SCIENTIFIC ABSTRACT KURMANOV, M. I. - KURMAYEV, R. KH.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R000927720013-0
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: June 20, 2000
• Sequence Number: 13
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

T, I C- V,
15/17
Scientific-TOchn.-cal Cionfer,'-zice c,-,, Metal'-vpgraphy a.-)d E'eatV
at firf;t oiid then opprc,:, i v, 'I a 1 u 0 f
thc, core. The 2-11-ructur,~'; of layers
obt-.,ined by shct pecnil-,
diffea~ conzldorul
Cam~licl-te of Tlechl ~).I
th
Li hii'l- mu
En.-iiacer Sh. R.
alloY Steel 15GDYuT C,
0. or --C loci If I , 0 .
0. 15-0-30% Si 0. 04-0~08% Al)
which -.vas dovelopc-d 'bL,, U~,:I-raiilian Res!-arc"- Institute;
t aese-'-itanii.Lra :IJU-h Cop"por for
u I
incrQa-cia- the otrerr,,:1`7 t'-,-- corrosion
and with fr,r ~~o n- to
obt,,.~in. a hiL;h i-pact For
oluciduLin 'Uhu of --,f on
t'-In, propor~ie.,--, of W-1,11,; used
by :aer-'ims, of wldc,~~ 14: 1
pre--(-"V,cc of
nes:; of
bo nor-ali :-.ed. T' C:~ to
-1-),j ur-.ud i F*C j,' C, f
C c I I L I t,,, 11. 1
ird 5/ () ~ .

Ocientif ic-Technical Collf ercmce- on- Meta 12 09-:caP!rY and Reat,
Treatment, Kharlikov
shoots. A particulir
i.--ipacL --tren_f7-bl- at ','0 to 100 C. It d!-~
tlian some steels used for tilc pu-,-o-se. Also, t1-is
stecl. has favourable strem-th propertic-3 -ood ~,-ialdability
b
and touE;hness, particularly at lo-.-. to:a,..-)cratureL~, quid
also it has little inclination to a,~,-ein,,-. ThiS steel is
at present beinG furth-~~r te.,Lted to elucidate its behaviour
in co:aplex strecs states and under vibl-a-t-Jon loadc,
Furthermore, the weldability and tho opti:.ium chemicaL
invecti,-.,
composition aro bL b - Utod in isroat dotail,
Candidate of Technical Sciencoo N. V. 11ol~Arayov (KhPI)
in his paper "Influ-~~,nc,--- of Nicbium on Fro-pert-Jeo, of
Mar-&-mccc, Steel" de~ilt o-1 Uhe influence
of niobium, on ",-h:,, britz~lorir-,C.13 aila (),- the .~,echanical
properties of mam-anese It that
0.20-0.L~S% N-1) rod-UzeS of :..-rim-anese
U
Stee'l, %,,,hich is one of c1ioap.,DEAU steol-c hi,(rh
otr,~~n;-;bh propertic~,-. If th-~ NI; coA-lit
tho impact stren-th of by 16he
Card
6/20 nor;aal mothod
tho formation of coLir-,,e cirb-ld,-,s. 7 j ,

XLWUNOV, M.I., kand. tekhn. nauk; SOIA)VfYICVA, G.G., Inzh.
Significance of testinge on the resilience of sheet steel and
discussion of results in determining its valitv- Truly Ukr. nauch.-
isel. inst. met. no.4:221-231 158. (MM 12:3)
Sheet oteel-Testing)
tallurgical plants-Qulity control)
M

AUTHORS: Kurmanov, II.I., Navrotskiy, I.V., 32-1-40/55
lands_FeNi15_V_a, Zh.F.
TITLE: A Device for the Investigation of the Damping of Oscillations
in Metal.3 (Ustanovka dlya issledovaniya zatukhaniya kolebaniy
v metallakh).
FERIODICAL: Zavodnknya Lrtbnratoriya, 1958, Vol. 24, Nr i , pp. iOl-103 (USSR)
ABSTRACT: In this paper the construction of such a device is described and
examples for the computation of the logarithmic damping decrement
of oscillations are given. The principal part of this device con-
sists of a firmly Yielded frame which is suspended from the ceiling
by means of a rope. In the upper part of the frame there is a
clamp , by means of which the sample is fastened, which has the
form of a metal strip, and on which oscillations are measured. At
the edge of the sample a magnet is mounted in a metal setting.
Under the magnet, on a table, there is a coil vrith 600 windings.
By means of a screw it is possible to adjust the distance between
the magnet and the coil. By the micrometer screw the initial
Card 1/2 bend-through of the sample is fixed by the magnet. When switching

It
Z
A Device for the Investigation of the Damping 32-1-40/55
of Os-illations in Metals
off the magnet the sample begins to oscillate; oscillations 31owlj
die down while the cur-rent formed in the coil is led to the ossil-
lograph, and a vibrogr-aphic recording is made. The logarithmic
damping decrement is then computed according to the follow-~ng
formula: (jr I n 2
n - I
where ndenotes the number of vibrations. There are 5 figures.
ASSOCIATION: Ukrainian Scientific Research Institute for Yetals (Ukrainiskiy
nauchno-issledovatel'skiy institut metallov).
AWLABLE: Libr-ar7 of Congress
Card 212 1. Oscillations-Control systems

80772
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0
Translation from, Referativnyy zhurnal, Metallurgiya, 1960, No 2, p 261, # 3K6
ATJTHOPS~, Kurmanov, M.I., Dobruskina, Sh.R.,RabinovAch, A.G.
TIME. High-Strength Low-Alloy l5rAJO T (15GDYuT) Grade Steel
PERIODICAL: Sb. tr. Ukr. n.-i. In-t motalloy 1959, No 5, PP 114 - 136
TEXT: A new grade of low-alloY 15GDYuT steel was developed containing
(in %)- C 0.13-0-18, Mn 1.20-1.50, Si 0.15-0.37, CU 0.30-0.50, Ti 0.06-0.10,;
Almet 0.011-0.08. Seven experimental smelts of the new steel grade were made
in a 10-ton basic open-hearth furnace and rolled into sheets of 12 - 36 mm thick-
ness- It was established that l5GDYuT steel after normalization possessed the
following properties: 6b - 57.2 kg/mm2; a, - 43.5 kg/mm2; C - 28.7%; Y -
74.7%; ak - 20.2 kgm/cm2; ak - 8.5-9.9 kgm/~=2 at -800C. After quench- 2
hardening from 9000C with tempering at 5600C the steel possessed Crb - 55.2 kg/mm
Card 1/2

80772
3/137/60/000/02/u7/010
fligh-Strength Low-Alloy 15rAW T (15CIDYuT) Grade Steel
2 2
44.3 kg/mm ; S - 17.8%; Y - 67.6%; ak - 20.8; ak - 7.7 kvVcM at
-860C. It Is reconunended to use 15GDYuT steel in the form of thick sheets in
heat treated state, This steel grade Is particularly fit for operation at low
temperatures down to - 1000C. There are 10 bibliographic titles.
T.F.
C ard 2/2

Icand.tekhn.nauk; HAYROTSKIT, I.Y., inzh.; FILIPPOVA,
T.F. . 1nzh.
Effect of arsenic on the properties of M16C steel (state
standard 6713-53). Trudy Ukr.nauch.-isslAnst.mot. no.5:
187-200 '59. (MIRA 13:1)
(Steel-Testing) (Arsenic)

.. KURMAJ107.j M.I., kand.takhn.nauk,- LEVE, N.F., prof.; SOWVIYEVA, G.G.,
Inzh.; GUREVICII, A.B., kand.lthim.naulc
Effect of arsenic an the reversible temper brittleness of
alloyed stools. Trudy Ukr.nuuch.-issl.1wst.ta9t, lio-5:202-211
'59. (MIRA 13:1)
(Steel--Brittleness) (Arsenic)

3/137/60/000/0P,/08/010
Translation from, Referativnyy zhurnal, Metallurglya, 1960, No 2, p 261, # 3887
AUTHORS- Kurmanov, M.I., r~obrusklna, Sh.R., Leve, N.F., Gurevich, A.B.
TITLE - 04MMMMMI~ 1, I'knd Its E:ffect on the Properties
Phase Distribution of Titanium
of fligh-3trength Low-Alloy 5 r IOT (15GDYul') teel
PERIODICAL~ Sb. tr. Ukr. n.-i. in-t metallov, 1959, No 5, pp 212 - 222
TEXT.~ Investigations were carried out into phase distrIbution of Ti and
Al in 150DYuT steel and into-the effect of these elements on the steel properties.
Specimens were cut out of hot-rolled 24-mm thick nheets In the aft.er-rolling and
after-normalization state at 8000- 1,2000C. The steel was composed as
f,ollows (in %): C 0.10-0.13; Mn 1.20-1.34; Si 0.13-0.17; Cu 0.36-0-.39; Titot
o.o%-o.oft; Altot 0.11-0-053; N 0.024-0.038. It was established that in hot-
rolled steel 85% of.the total Ti amount (0.1%) was contained in the carbide phase
and 15% in the solid solution. In steel normalized at 8000, 9000 and 1,OOOOC, the
Card 1/2 /~[~3

3/137/60/WO/02/08/(j 10
Fhase Dtstribut:on of Titanium and Its Effect on the Properties of fligh-strerglh
Low-Alloy 15rAOT (15GDYuT) Steel
whole Ti amount was contained in the carbide phase; after normalization at.
1,2000C the carbide phase contained 70 and the solid solution 30% of the f0tal
Ti. amount. There are 13 bibliographic titles.
T.F.
A?
Card 2/2

KURRANOV, M.I., kand.tekhn.nau k; I14SHEM92SKIT, V.I., inzh.; SOWVIYEVA,
G.G., PIKULIH&. L.H.r
Investigating causes.-~.6f the low toughness of thick sheet
(up to 50mm.) M16C nt~el corresponding to State Standard
6713-53. Trudy Ukr.nauch.-isol.inst.met. n0-5:223-233
159. MlLk 13:1)
1. Ukrainekly institut metallov i Zavod im. Vornehilova.
(Sheet steel-Tenting)
(Steel-Metallography)
I

MMNOV, M-I-; HAVROTSKIT, I.V.; MIMIX0. YU.S.
Ivaluation of the cold trittleneee of structural P6-at steel. Zav.
Inb. no-11:1370-1372 159. (MIRA 13:4)
l.Ukrainekiy nauchno-ionledoyntelleMy Inatitut motallov.
(Steel --Brittleness)

12
AUTHORS:
`HTLE:
693A
S/129/60/000/05/008/023
E193/E283
Kurmanov, M. I,,, and Rabirlovich, A. G., Candida*~es of
TcTdhnical-S-C'Ie.Tices, and Dobruskina, Sh. Engineer
Low-Alloy, High Strength Steel PlaUe_~'
PERIODICAL: Metallovedeniye i termicheskaya obrabotka metallov,
1960, Nr 5, PP 30, and 35-39 (USSR)
ABSTRACT: The object of the investigation, described in the present
paper, was to develop a low-a;loy steel0having a yield
point not lower than 40 9g-/_mm-. Man6anese and small
quantities of titanium aluminium, -arid copper were used
as the alloying additions, titanium being added not
only to increase the strength of steel, but also to
reduce the oxygen content, improve its weldability, and
reduce the grain size. The experimental melts were
carried out in a 250 kg induction furnace with a basic
lining. 65 k ingots were forged to bars 0(16 X 70 mm
cross-section~ and then normalized at 900 C. The results
of mechanical tests showed that steels, containing
0 05 to ~J5%0 Ti, all had the yield point higher than
46 k6liam ; further addition of titanium decreac~ed the
ductility and toughness of steel without appreciably
Card 1/8 increasing its strength. The mechanical properties 1'Y

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Low-Alloy, High Strength Steel Plate
of steel were not affected by its aluminium content;
however, with the aluminium content lower than 0.05%,
coarsely-crystalline ferrite was obtained, as a result
of which the critical temperature of cold brittleness
was raised. With the increasing C + 0.25 Mn content,
UTS (6b) increased more rapidly than the yield point
(6T); consequently., with the increasinE magnitude of
C + 0.25 Mn, the OT/6b ratio decreased. On the basis
of these preliminary experiments, the following composi-
tion was chosen for the proposed, low-alloy, high
strength steel 15gDYqT-~t 0.13 to 0.16% C, 1.2 to 1.5% Nin,
0.15 to 0.3?% Si) 0.3 to 0.5% Cu, 0.06 to 0.1% Til
0.04 to 0.08% Al (metallic) and no more than 0.04%
S and P. No difficulty was experienced in making steel
within the sDecified composition limits, as is shown
by the results of chemical analysis of five experimental
melts of this steel, given in Table 1; (the last
column of this table gives the sum of the carbon content,
Card 2/8 plus a quartor of tbe mangniv.,se content). Fig I shows

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Low-Alloy, High Strength Steel Plate
how 6T, 6 b (kg/mm2 ) elongation 6, reduction of
area, ~, impact strength ak (kgm/cm2), and the(5T/ 6b
ratio (right-hand scale) varied with the varying C + 0.25
Un content. Fig 2 shows the variation of impact strengths
ak (kgm/cm2) as a function of test temperature (OC),
curves 1 to 4 relating to steel with the C + 0.25 mm
content equal 0,43, 0.462, 0.447, and 0.547%, respectively.
It will be seen that the impact strength of the steel
under consideration at temperatures as low as -600C is
quite high, even when the C + 0.25 Mn content is relatively
high. In the next chapter of the present paper, the
effect of phase distribution of titanium on the properties
of the investigated steel, is discussed. Steel 15GDYuT,
containing more than 0.05% Ti, can be used only in the
heat-treated condition, since steels of this type, in
the hot-worked condition, are brittle; it has been
postulated (Ref 2, 4) that this brittleness is due to
the fact that all titanium Dresent in the steel is in
the solid solution; in the absence of experimental
Card 3/8 proof of this hypothesis, the present authors studied

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Low-Alloy, High Strength Steel Plate
the constitution of two steels containing 0.04 and 0.15% Ti,
in the hot-worked and normalized (at 900 C) condition.
The results are given in Table 2 under the following
headings: number of the melt; carbon content, %;
titanium content, %, (a) total, (b) in carbo-nitrites,
and (c) in solid solution, and impact strength$ ak
(kgm/cm2) for (1) hot-worked steel and (2) normalized
steel. It will be seen that only traces of titanium
were found in the ferrite of steel with less than 0.05,04
titanium; this quantity of dissolved titanium did not
affect the impact strength and normalizing treatment was
unnecessary. At higher titanium content, part of this
element is precipitated as carbo-nitrites, part is in
solid solutioni normalization of tho hot-worked material
brings about precipitation of dissolved titanium, as a
result of which th~ impact strength increases from
1.5 to 30.2 kgm/cm , The effect of the normalizin6
temperature on the mechanical properties of steel
15GDYuT is illustrated in Fig 3, where 6Ts (5bi (left-hond
Card 4/8 scale), 6, ak (right-hand scale), and hardness HRB
7~ -2777=

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Low-Alloy, High Strength Steel Plate
(Rockwell B, scale on the extreme right) are plotted
against the normalizing temperature (OC). To determine
the phase distribution of titanium after quenching and
tempering, samples of melt 373, water-quenched from
12000C and then maintained for 2 h at temperatures between
300 and 11000C. were examined. The maximum quantity of
titanium dissolved in ferrite was found in the quenched
specimens; on re-heating (starting from about 6000C),
titanium was rapidly rejected from the solid solution, the
minimum quantity of this element being retained in the
solution after treatment at 9000C. The laboratory
investigation was followed by full-scale industrial
trials, the results of which are discussed in the last
chapter of the present paper. Seven batches of steel,
made in an open-hearth furnace, were rolled to plate 12,
24, and 36 mm thick, and then chemically analysed and
subjected to dilatometric and mechanical tests. The
test pieces for mechanical testing were either normalized
at 9000C or quenched from 9000C and tempered at 6000C.
Card 5/8 The resuits of tensile tests are given in Table 3 under LX

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Low-Alloy, High Strength Steel Plate
the following headings: direction of testing (normal
to the direction of rolling; parallel to the direction
of rolling); thickness of the plat mm; mechanical
pro kg/mm ~; 6
erties - 0 (yield point .~,(UTS, kg/mM2);
6 s~ ; 6, felongation, %~i (reduc ion of area, %).
it wii~ be seen that the investigated steel is characterized
by high strength combined with high ductility, irrespec-
tive of whether tested in the direction parallel or normal
to the direction of rolling; this small degree of
anistropy of the mechanical properties is attributed to
the beneficial effect of titanium on the grain size of
the investigated steel. The effect of the Z(C + 0.25 Mn)
on the mechanical properties (in the direction normal
to the direction of rolling) is shown in Table 4, under
the following headings: average value, %,, of
Y (C + 0.25 Mn); 6 1 6 and 6 for plate of various
thickness. The results o~'dynamic bending tests are
given in Table 5, showing: direction in which the test
Card 6/8 pieces were cut from the plate (transverse; longitudinal);/

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Low-Alloy, High Strength Steel Plate
thickness, mm of the plate; impact strength ak (kgm/cm2)
at various temperatures; ak after strain ageing. (In
these tests the specimens were bent throuCh 1800 over a
radius equal two thicknesses of the specimen; after
the dynamic test, the test pieces were bent further
until their ends met; only in a few cases of extra
wide (100 mm) test pieces, small cracks were detected
after testing; strain-ageing tests were carried out
according to GOST 7268-54). The properties of steel in
the fully heat-treated condition (quenched from 9000C
and tempered at 6000C), determined in the direction
normal to the direction of rolling, are given in Table 6,
where the first column shows the thickness of the
specimen. The impact strengths of steel after the same
treatment is given in Table ? under the following
headings: thickness, mm, of the plate; a at various
temperatures; ak after strain a--eing. TL results
of other (welding, Bending, piercing) tests showed that
in this respect, steel GDYuT is comphrable with other
Card 7/8 steels (lOEhGSMD or 1OKhShID), whose price per ton is
~d V

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Low-Alloy, High Strength Steel Plate
200 or 120 roubles higher. There are 3 figures,
7 tables and 5 references, 1 of which is Soviet 1 English
and 3 German.
ASSOCIATION: Ukrainskiy nauchno-issledovatellskiy institut
metallov (Ukrainian Scientific Research Institute of
Metals)
Card 8/6

KUlUIANOV, II.I.; NAVROTSKIY, I.V.; TOMEIIKO, Yu.Sh.; DOBRUSKIIIA, Zh.R.
Structural strength of certain high-freoistance low-alloy
steels. Trudy Ukr. natich.-issl. inst. met, no.6-.217-229 160.
(MIRA 14:3)
(Steel alloys--Testing)

S/133/60/000/007/010/016
AUTHORSs Kurmanov, U.I., Candidate of Technical Sciences; Filippova, T.
TITLE% The Effect of Arsenic on Carbon- and Alloyed Structural Steelsl
PERIODICAL; Stall, 1960, No. 7, pp. 637 - 642
TEXTs In order to investigate the effect of arsenic on carbon-con-
taining and alloyed structural steels 14 types of these steels (FUCT 4543-
48 - GOST 4543-48 and ,?)r
I U1050-52 - GOST 1050-52) were melted in induction
furnaces. Structural examinations proved that arsenic induced the develop-
ment of streak structure in the steel, which could not be eliminated oom-
pletely by conventional heat treatment and the homogenisation of the steel
at 1,2000C for 10 hours with a subsequent normalisation. It was found that
the arsenic content raised the resistance of the steel somewhat, whereas it
decreased plasticity and also to a slight extent its impact strength. Arse-
nic~ in a quantity below 0.3% changed the critical points. In steels alloyed
with Cu, Mn and Mo, arsenic raised the critical points, i0nickel alloys on-
1 Y &'; 51 in silicon Ac, and Ar3, whereas no change was observed in the crit-
Card 1/3

S/133/60/000/007/010/016
The Effect of Arsenic on Carbon- and Alloyed Structural Steels
ical points of steels alloyed with chrome and phosphor. Reversible and ir-
reversible brittleness were also increased by arsenic. The increase in ir-
reversible tempering brittleness was mainly found in alloyed steels, where
not only Lhe decrease in impact strength was observed, but also the shift
of the minimum to the direction of higher temperatures, moot probably as a
result of the lower content and the higher stability of the residual auste-
nits. The kinetics of the isothermal decomposition of austenite were exam-
ined by A4ulovla method and it was established that the isothermal decompo-
sition curves display a stable character when the As content was below 0.3yo,
the kinetics of austenite transformation, however, underwent considerable
changes. In steels alloyed with Hi, Si, F, Mn, Cr and Mo at temperatures
below the zone of minimum stability of austenite, arsenic shortened the pe-.
riod of incubation and transformation and decreased the amount of resiaual
austenite. In steel alloyed with Ni, Un and Mo arsenic decreases the in-
cubation period in the zone of minimum stablity of austenite. In steels
alloyed with Si, P, Cu and Cr the incubation period will b; longer. The
analysis of the curves of isothermal transformation indicates that harden-
ing properties are effected unfavorably by As, In cementation arsenic im-
Card 2/3

S/133/60/000/007/010/016
The Effect of Arsenic on Carbon- and Alloyed Structural Steels
peded the carbonisation of steel and as a result of this the cemented layer
was less saturated by carbon and its thickness was reduced (Ref. 15), When
increasing the As content up to 0.31~, the hardness of the cemented layer
increased somewhat, while the amount of residual austenite decreased. It
was established by metallographical'and X-ray structural analyses of the ni--
trided layer that during nitriding arsenic impeded the saturation of the
steel surface by nitrogen. When applying arsenic-containing steels, the ac-
tual manufacture conditions and the purposes of the machine parts must be
taken into account. There are 2 graphs, 1 set of photograph, 7 tables and
15 references~ 11 Soviet, 1 English, 1 French and 2 German.
ASSOCIATIOTTi Ukrainskiy nauchno-iseledovateliskiy institut metallov (Ukrain-
ian-Scientific Research Institute for Metals)
Ca-td 3/3

SIINEYEROVp Ya.A.j IXPORSKIYj V.V.; KAZARNOVSKIYt D.S.; K01INq A.G.I.JV_JHWOV,
~m,I.-J--PUKAGFWf A.I.j SLADKOSIITEM# V.T.; BULISM, M.T.; SVIA!Dmmg--
F.F.; SIDELIKOVSKIYp M.P.; KOZHKVNIKOVr I.Yu.9 red.; BORODAVKIN, M.L.v
red. izd-va; ISLENTIYVA9 P*G., tekbno red,
(Converting phoopborouo caot iron in open-hearth furnaces] Peredel fos-
foristykb chugunov v martenovskikb pechakb. Moskvat Gos. nanchno-
tekhn. izd-vo po chernoi i tsvetnoi metallurgiip 1961. 256 p.
(MIRA 3J+: 8)
(Open-hearth process)

3/137/62/OOG/001/137/237
A05Z/A101
AUTHORS: Veselyanskiy, Yu. s., Golik, V. R., Kurmanov, M. 1.
TITLEt, Miarofraotographic study.of steel fractures depending on the
4estruction temperature
PERIODICALI Referativnyy zhurnal.,Metallurglya, no. 1, 1962, 32-,-'33i - abstract
11217..,(Sb. tr.. Ukr..,n.-i, in-t metallov, no. 7, 1961, 199 - 205)
TEXT: By the electronic microscopy method (by investigating titanium im-
prints with SM -3 (EM-3) electronic. microscope) the fracture of ~.Mahazhe samples
made of normali zed - M C T 3 (MSt3) steel destructed at temperatures f rom +900C to
-1960C were studied. On the basis of microfractographic study of the microstruc-
ture of rractVres depending on ' the -testing. Aetbperature:, a criterion for the dis-
position.of steelto the brittle.destruction is suggested,.-+ The fractures are..
classified into the -semibrittlel" ones (with a "wavy pattern") and the "brittle
proper" ones (with "tongues"), There are 11 references.
T. Fedarova
[Abitracter-'s.-note: Complete'translation]
Card 1/1

SANDLER, N. I.0 kand. fiziko-matematicheskikh nauk; MOMAKHOVA I L. V.P
kand. tekhn. nauk; KUMWOV M kand. tekhn. nauk;
) A. 'Ma
ALEKSANDIROV F. ~Io Mor%~ekhn. 'nauk; SABIYEV M. P. inzh.
J, Y 9 1
Defects in manganese-aluminum steel slabs. Met i gornorud.
prom. no.1:62-66 Ja-F 163. (OA 1614)
1, Ukrainskly institut metal-lovs
(Steel ingots-Defects)

NAVROTSKIY, I.V.; SANDIM, N.I.; r1j"imilINOV, M.I., kana. Le~,I.T.. n8Lk.
Nature of hardenLng low-alloy manganene steel by vanadlim,
niobium, and t-,mgsten. Sbor trud. UNIIM no.9:377-393 Ift
(14IRA 18~,l)

, z I . !I ~' . , r,
, ~,F; . , I

I- - '; ::1~7,7'"',: L
. ,
.21 1." -

1,1 . zh. Metallurglya, Al-.,:-:.
.-; I !

DRYUKOVA, I.N.
Thermomechamical treatment of structural steel. Metalloved. i
term. obr. met. no. 2:38-41 F 165* (MIRA 18s.12)
1. Ukrainokiy nauchno-4seledovatel'skiy Institut metallov.

i. .,, , , ,, !. ,~i . ,; ~, ~ , ~ : ; 1. !~,~ .~ t,F~J.); Mj,, klind. t;jkhn.
1 .1. " ~~ J! t.41 I z elb- ...Y
e !-f-, t of -hi) f,&rtum c,,:L47r-,un of rare- iar, cl6manti on ths
"tire arld proportl,.~.t of a caz-bu~ ti,,,6ft~ !ngot. Sbar.trud.
I," Ul ',,,4 ncl,. I *-! a 21 50-? 61 1 f,5.
(MIRA 18:11)

KUP14MIOV, M.I.; DOBRUSKINA, Sh.R.
Conditions for obtaining a bainite structure in low-alloy
steel during continuous cooling. Sbor.trud. UIIIIM
no.11:267-276 165. (MIRA 18:11)

AZARKOVIGH, A.Ye., Cornri inzh.; DQNSKOY, M.G., Cornyy inzh.;
YURMAVOV? MIJI., gor-nyy inzh,
Efficiency of lowuring the yield of oversize during primary
blasting. Vzryv. rab. no.4:10/v-1-11 160. (14IRA 15:1)
1. Proizvodstvenno-oksperinentallnoye upravleniye Voesoyuznogo
tresta po burovym i vzryvnym rabotam.
(Blasting)

DULITSEV, P.P. , gornyy toklmik; HIMIL'OV, HJI. , gorny-j inzh.
Blanting oporationD at the "Kamskoyo Ujtlyo" gyp3um mine.
V~ryv. rab. no.4:112...121 160. (Mlw, 15: 1)
1. Proizvodstvenno.-.okspgrimntallnoye upravloniye VsesoyuznoEo
trosta po burovym i vzryvrrjm rabotam,
-(Kamskow Ust I yo-- Gypsum)
(U*Ating)

KWAKkNOV, M.M.; RUBTSOV, VA.
Improvement of boring and blasting operations and potentialities
for cost reduction in quarries. Gor.zhur. no.10:75 0 160.
(MIRA 13:9)
1. Podzemno-okepluatatsionnoye upravlaniye Soyuzvzryvproma,
Moskva.
0- (quarries and quarrying)

XMIAROV, Inn.
Greater efficiency of boring and blasting operations at the
Kamskoye Ust'7e Gypsum (~uwrY`- Vzr7y. delo no.45:134-147 16o.
(MM 14:1)
(Kamokoyo Ustlye-G7peum) (Blasting)

llyp-~ I, t., 14C n
r ,
Symf'cn'.-' '--ni c~'
IN
-onthlv lAzt of Rus~;ivm Accessions, LLlyrary of Con,-ress, 1-eccml~~r 195'.

SHITIKHINX V.V.; KURMASHEV -' A.M.; BAYUVCIfIKOVA, Z.V.; STOIYA.TZOV, A.G.,
red.izd-vai-BYK-- t V.V., tekhn.red.
[Exploratory directional drilling] Burenie napravlennykh geo-
logorazvedochrWkh skvazhin. Moskva, Goageoltekhizdat, 1960.
119 P. (MBU 15:5)
(Boring)

KUW.IASIeV, A.M.
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1. Vsesoyvznyy nauchno-isaledovateliskiy institut metodiki
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komiteta SSSR.

3/031/61/000/007/001/001
B116/B201
AUTHORS: Yatayev, Lt., Kurmaahev, D. , Candidate of Physics and
blathemat ion
TITLE: A critical cane of stability of a stabilized motion
according to Lyapunov
PERIODICAL: Akademiya nauk Kazakhokoy SSR. Vestnik, no-7 (190`11961,99~-104
TEXT: A study hau been made of a system of three differential equations,
who~-e characteristic equation in first approximation has a zero of third
order. A group of solutions in first approximation is assuned to
correspond to this zero. After some transformations the said system is
wrilti~n as dx/dt=y, dy/dt=z, dz/dt=Z(x,y, -,) (3). Z(-(' yy zis
-~xp,and,M in a powers series of z: Z(XV yl Z) . f0 (XI A + Z f (X f Y~
.1 1
+ z " f (I - j
2 XT Y) + . . . .If here fo(XV Y)~O, (3) will have an unstable
particular oolution: x = c1t + c29 Y . C, , z = 0. Therefore, the undisturbed
motion determined by (3) is not stable in this case. If f0 (x, y) # 0 and
C~ir6 1/4

S/031/61/000/007/001/001
A -ritical 4;,aBe of utability of... Bl16/B201
(X; PC. (X) + .11?1 (X) 4 y2Y2(x) + (3) will acquire the form
d x1d t - y, d y/d t z z, d z/d t = yo (x) + ykPj (X) ~ Y: tf 2 (X) + z f 1 (x I Y)
'2f (4). The case with qo(x)SO in fir9t examined
2(xly) +"' 2
The follo%Ning is assumed: fl(x, Y)-To(x) +Yfl(x) 4-Y lP2(x)
The sjstem to be investigated then reads: dx/dt =y, dy/dt. z,
d Z/ d t ~ Y'P
(X) + y 2T2 ( X) +
4 Z [To (X) + Y-Y, (X) +...I +z2 f2(xl Y) +
next.
. . .
I
Undi-iturbed motion is shown not to be stable if the series oftp,(x)
(5).
or
*TC(x) begin with odd powers, or with even powers the coefficients of which
ar,i pojitive, If the series of the same functions begin with even powers
w
't' (since
i fl),,n~ositive coefficients, two cases must be distinguished
VI(x BO : 1, kPj(c)