SCIENTIFIC ABSTRACT DUPAL, O. - DUPLITSKAYA, V.A.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R000411610007-1
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: August 25, 2000
• Sequence Number: 7
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

GADEK) J.; FHEIWILLIG, R.; DUPAL, 0.
Reaction between carbide and mother metal In acme steel alloys, Hut
21sty 16 no.12:874-885 D 161.
1. Vymkumny ustav butnietvi seleza., Praha.
(Steel alloys) (Carbides)

Z/034/62/000/008/002/004
E073/E535
A'OTHORS: %ladek, J., Engineer, DunAL11,JO.. Doctor of Science and
Freiwilli~g, R. Engineer
TITLZ: Precipitation of carbides in alloy steels.
Part I. Precipitation of carbides during tempering of
chromium-molybdenum steels at 65a0c
P!_'~RIGDICAL: HutnickA listy, no.8, 1962, 573-580
TZXT: This aild the succeeding parts of the study relate to
the orecipitatiou of carbides in chromium-niolybdenum, chromium-
tungsten and chroviiuta-vanadiuo steels at 650*C in the case of
tempering for periods between 6 min and 5000'.hours, as well as for;
the case of isothermal decomposition of austenife and annealing
at the same tei7iiperature for periods up to 50-00 hours of the
proc;ucts of this decomposition. In this first part the results
.relating to fifteen chromium-niolybdenuta steels with compositions
as ,,,3.ven In Table 1 are reported. The results of studies of~the
precipitation of the carbide M 2C and the reaction M C-0 M6C were
the su!)ject of earlier work (liutnick4 listy, 16, 1991, no.12,
p-27LO, _hex-e t1ia PrGeipitation of tb.,3 carbides in some of the
CArd 1/4

Precipitation of carbidbs Z/034/62/000/008/002/004
E073/E535
fifteen steels (CM2, CM115, C119, Cmlo and CM12) studied in this
paper was also reported. The carbides were isolated electro-
lytically and then subjected to X-ray diffraction and chemical
Analyses. The most frequently observed carbides, particularly
in t1he case of *high alloyed steels, were M2, C and M 6C. This is
attributed to the tendency of chromium and o~ybdenum'to form in-
Fe-Cr-Mlo-C alloys carbides which are characteristic for Fe-Cr-C
and Fe-Mo-C alloys, although they are distinguished by a
sufficiently high solubility of iron and of the other element
(',Ao or Cr) , but not to forro carbides 117C or MC, which have a low
solubility for molybdenum and possibly aRso for chromium and iron.
The car-bide 1-1 ?3 C6 may contain only 11.2% Cr and 5.2% Mo and even
less or, on th other hand, it may contain up to 11.5% or even
aziore of molybdenum; the 'chromium. concentration in M 6C may be as
high as 9%. Even a very slight addition of chromium into
i.-.o3.ybk`enu-z steels causes a radical slowing down,or completely
su2presses, the formation of MC,carbide. In the equilibrium state
the solubility of molybdenum in 2.1 C i s only about 2% but in the
,7 3-10
'letastable state it may reach I
lybdenum reduces the rate of
10%
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E073/r.535
t:1C. reaction NAI-C -.> 1-1 -, CAt chromium concentrations of up to
1.5-Z/i tlle stzi")i-lity o?' ~"'a carbide M C is only slightly affected
by the chromium content; however, at RiSher concentrations
chromium reduces the stability of M 2C. The iron concentration
in MOC imay reach about 10% and in some cases it may reach 27%-
Zia 6hro.;Uum concentration may reach 22%. The view is widely
.ield tiiat if the solubility of a given element in a given
carbide is less than the concentration of this element in the
soli(. solution, the carbide may accept the given element in a
concentration not hiSher than the concentration in the solid
Solution. It was found that this view is not generally valid,
.Lor instance, M-C which precipitates during 6 irrin terapering in
tile steel CM7 ('i.li% Mo and 4.2% Cr) contai'n&d 5.3% Mo and 2.6% cr;-
tLe authurs could not explain this phenomenon. Neither the
precipitation of the intermetallic Laves phase Fe 2Mo nor the
fornation of a quaternary carbide could be proved for any of the
steels investirated; all-the carbides which precipitated and
,vaich e.-cisted in the stable state were derived from carbides of
the appropriate binary or ternary sub-systems. There are 16
figures and 3 tables.
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B073/E535
ASSOCIATION: Vy'zkumn~ ustav hutnictvl Zveleza, Praha
(Iron and Steel Research Institute, Prague)
Table 1
Composition,% Ratiom
Steel
-at.% Cr at.% mo
~C r at.%C '0 at.% C
4.,x Austenization temperature 1250*C
Ca~d 4/4
c I mn SL I Cr I m0
CMI 0,37 0,21 0,02 1135 0,48 0,942 0,192
CM2 33
M 0.26 0.04 1.50 0.92 1,050 0.341
CIN13 9 0.46 0.02 .1,63 1.97 0,963 0,632
CM4
'
0 10 IA 3,29 1,00L 1,083

VI
C
5

3
':'0
1
'.2
"
S.
A

1,69

.70

,301

,375
C1116 047 0,38 0,42 4.51 0.58 2,215 0,149
C1.17 1:42 0,39 0,40 .4,22 1.15 2.321 0,331
cma 0,36 0,34 0.43 4.74 2.13 2,057 0,T14
CM9
39
0 0
41 10
1 :1 1 5
5 2,532 1,131

cm
10
41
d:
031
:
032
:
.25 45
5:
2,394
1,662
cmil..) 0.37 0,27 045 4.39 6,62- 2,740 2,240
C1412 *)
: 0,25 0,28 0,33 4.57 5,77 4.213 2,883
')
CM13 0,60 0.25 '0,11 12,56 2.00 4,61S 0,417
Cb%14*-) 0,48 0,29 0,31 12,67 3.22 d,lu O'B"
CM1500) 0,16 .0.39 0,39 13.46 4.26 6,7SO 1,703

CATEGORY
ABS. JOUR.
AUTHOR
INSTITM
TITLE
ORIG. PM.
:-'jZhX;H0SL0VAK1A---
:Chemical Technology. Chemical
Annlications. Food Industry
: RWWm,,, NO 17# 19591 110- 625'il
:Posy)isilova, J; Dupal,R.
U
Products and Their
:Comment on the Determinaiion of I-Ascorbic Acid
in Horse-Radiab bv the Titration Method Wit~ 21$
:Prumys] potravin$ 1958, 9, No 9, 499-500
ABSTWT :By chromatogranhy on naper it was established
that borse-Tadish., aside of the L-ascorbic acid
t][), does not contain other substances, that re-
duce 2', B-d4~chlorphenolyndophonol...Investigation
t).f various -narts of the raaisb root revealed -that
the maximum concentration of I is confined to the
central portion. The Preraration of samnles and
analysis of horse-radish must be carried'out ra-
pidly in order to avoid the action of ascorbiase
on I. Finely diced horse-radish at 200 loses
*6-Dichlor-nhenolyndonbenol.
Card: 1/2

CATWORY
AM. JOUR- P2XKhiM,j, No 17,# 1959; No- 62551
AUMOR
USTITUTS
TITLE
OFdG. PUB.
ABSTMCT