SCIENTIFIC ABSTRACT VACEK, J. - VACEK, V.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R001858320008-6
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: August 31, 2001
• Sequence Number: 8
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

4
9161 11=51 Sts m tr
*1 bm"
Pokr OkVoW.Od0~11
Bruo 195 1954).-MatccWs such as WC, W*4:;
B.Pca"n'
Mo&C, CrOCI, Bg can be made Into cermets, by using out-
ficlent pressure At elevated temps;, whkh am ItW Iowa than
:the m.
Thus, WC maybe compressed from the powder lntLi
x contmuoua shape* at any temp. above 1600*. The maxe
bardnew (Rockwell 94) is sitt-Ined at'.1-7600', .-VA46M,

3 is
Wolfram as material for welding electrodes, P. 356P ZVARANIE (Kinisterstvo
hutneho prumhslu a rudnych bani a Kinisterstvo strojarstvo) Baratislava,
Vol. 3, No. 12, Dec. 1954
SOURCE: West European Accessions List (Ei~AL), Librriry of ConFrc:35p
Vol. 4, No. 12, December 1955

4017, AIVI f Mot W rkllr.;.
MAW a "I"
DO. 7. July -' .17-42~.
Powder eta; tnaIwItcvrhg~y4trd oiniidc Irtiln~'Yqr, 1:r"Ifit fr(tjir~
Ae

je;
DI S4~-rilbutl~-,on of 12abava Olato i;, .'.'orthueutc~rr, Par' of
7, TISD
~91 --7-1 7' !iol. 2 2, if-,
pra:-Z,
SO: Iont]Ll-y Lict of Ea-st European Accessiono, (=), IC, "01- 1
No. 5) Uric!.

V 1)
25(l) PHASE I BOOK EXPLOITATION CZECH/2418
Agte, Curt, Doctor, Engineer; and Jirvi Vacek, Doctor, Engineer
NeJnov'e"J's*'i/ technicke-' s4ry v pral"skove.' metalurgii (Modern Englneering
Trends ir) Powder Metallurgy) Praha, Statni Nakladatelstovi
Technicke Literatury, 1955. 101 P- 1,200 copies printed.
Reviewers; L. Jenfe-ek, Engineer, Doctor, Professor, and A. Vambersky/,
Engineer,t Dogtor; Resp. Ed.: Fr. Hruza, Engineer; Tech. Ed.:
Vlasta V ova; Managing Ed. for Literature on Metallurgy: Pavel
Knobloch (Chief Ed.)
PURPOSE: The book is intended for readers interested in powder
metallurgy.
COVERAGE: Thiebook provides information on modern engineering
trends1n powder metallurgy. The book is based recent work
of the Vyzkumny ustav pro pra8kovou metallurgii Nesearch
Institute for Powder Metallurgylin Ve8tec near PragueD, It
deals with the chemistry of mixtures, ointerability, forming
and production of alloys during powder metallurgy processes.
Card 1/5

Modern (Cont.)
CZECH/2418
The authors thaUk M. Petrdlik, 6. Ocet4, H. effi6lna, L. KAtk~,
Z. Ministr, A. Cturtnik, J. Hrusna, and L. Jenfc)5k of the
Research Institute staff. There are 62 references: 34 Czech,
17 German, 7 Engllsh, 3 Russian, and 1 French.
TABLE OF CONTENTS:
Preface 5
1.00 Introduction 7
2.00 Chemistry of Mixtures 7
Ll,'.10 Preparation of powder mixtures by crushing or milling 8
2.20 Making a paste of the dry base component with a solution
containing other components in the form of metallic salts,
etc. 10
2.21 Production of hard metals 10
2.22 Production of ASKO contacts (method S) 12
2.23 Treating tungstic acid with admixtures which prevent
Card 2/5

Modern (Cont.)
CZECH/2418
recrystalization (electric bulb industry) 12
2.24 Manufacture of metallic filters of considerable capa-
city 13
2-25 Improvement of sinterability by means of small admix-
tures 13
2,26 Other types of treatment 14
2.27 Treatment with molten metals 15
2..30 Reaction in the solid state 16
2.31 Preparation of tungstenates and molybdenates as by-
products in production of pseudo-alloys (ASKO ma-
terials) fi 16
2.32 Formation of tungstenates, titanates and titainium
tungstenates In the technology of hard metal 17
2.40 Reduction and precipitation reactions 18
3.00 Acceleration of Reactions 19
3.10 Buoyancy-type reaction 19
3.20 Induced reactions 24
3.30 Reactions influenced by catalysis 25
Card 3/5

Modern (Cont.)
3.40 Reactions in vacuum
CZECH/2418
4.00 Sinterability
4.10 Conditions for generation of good sinterability
4.11 jurity of the tungstic acid used
4.12 Grain size of W03 and of W, reduction of W03
4*13 Shape of the tungsten grain
4.14 Lattice distortion
4.20 Effect of admixtures on sinterability
5.00 Methods of Forming
5.10 Forging in flat and round dies;
5.20 Production of sheet metal from
system
5.30 Direct rolling of powders
5.31 Description of the method
5.32 Fabrication of Iron sheets
5.33 Fabrication of metal sheets
5.34 Rolling brittle powders
5.341 ASKO materials
rolling
the metal-metallic oxide
from ductile powders
26
2_17
27
28
35
36
42
58
58
64
68
68
70
72
72
73
Card 4/5

Modern (Cont.) CZECH/2418
5-342 Friction materials 74
5-35 Sheets with several layers or strips 75
5.36 Hot impact extrusion 78
6.00 Production of Alloys by the Meth ods of Powder Metallurgy 81
6.10 Fe-Ni-Co alloys 82
6.20 Au-Pt alloys 86
6.30 Other alloys 89
7.00 Change in Lattice and Structural Transformations 90
7.10 Effect of crushing (milling) on the lattice and crystalline
structure of metal powders go
7.20 Significance of crystalling s tructure in the technology
of hard metals 94
8#00 Conclusions 95
Bibliography 98
AVAILABLE: Library of Congress
GO/Jb
Card 5/5 11-24-59

Sill,
10, 7.9
other Inufalo
""innf., C., 'Ni fo 1, r,,d rt,,rq,~,q, I i"
lltqN,
It
rM
th ~Ior tal,
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18(o);25(1) PHASE I BOOK EXPLOITATION CZECH/1255
Valruova" techniks, v metalurgil; 3bornfk refera"tfi (Vacuim Technology
-in Metallurgy; Collection of Articles) Prague, SHM, 1957.
194..po,. J1,450-copiet.printed.
Reviewer: Jenf~ek, Ladislav, Professor, Doctor, Engineer; Chief Ed.
for Mining Literature: Knobloch, Pavel.
PURP W : The book is intended for technicians and engineers working
in metallurgical, machine-building and electrotechnical plan'ts
and also for students of technical schools,
COVERAGE: This is a collection of articles on problems and possi-
bilities of using vacuum in metallurgy and describes manufacturing
techniques and equipment. The articles were collected by VTS-HS.
(Czechoslovak scientific Technical Society for Metal Making and
Founding) and were edited by SNTL (State Publishing House for,
Technical Literature). The names of Doctor Engineer F. Kinalky
and Candidate of Technical Sciences Z. Eninger (from ZVIL) are
mentioned as having contributed to this field. There are 19
Card 1/5

Vacuum Teohnology
CZECH/1258
references, 15 of which are Czech, 2 English, 1 German, 1 Rus-
sian,,
TABLE OF COIRTENTS:
FoxAmord
Espe.. Werner, Professor, Doctor. Vacuum Technology in Metal-
7
lurgy 11
Odstrvoil, Bohumil, Professor, Engineer. Use of Vacuum in
Metallurgy of Some Metals and Alloys 6T
Vacek, Ji~i", Doctor, Engineer. Use of Vacuum in Powder Metal-
lurgy 85
Mamula, Milan,, Engineer. Sintering of Metals In Vacuum 113
HI_x, Petr, State Prize Winner. Vacuum Devices,, Their
ftrAtAxction and PriTtelples of Operation 143
Card 2/3

Vacuum Technology CZECH/. 1258
AVAILABLE: Library of Congress
Card 3/3 CIO/ar
3-23-59

-YACSIK I J.
TECIINIOL(I~Y
nerir-dLcals: PL11Y Vol. 6. no. 9, Sent. 195"',
VAGEKp J. Research of' iron (-,r(:s in d;arr;~ndiim, itsms,,Tts an,(!
prospects. p. 291.
Nonthly List of East E,.jrcpr--an Accessions L- Vol 8. no. 5
!Tay 19~Q, Unclass.

TAi rIJ D
eawder -olMHuru. of n1oblum. '~"Vacek (Forsch)Fi-' thatt 10-1 min. ft The lattke coust. wus 3,3321 A.
't.
a
'X13t. v verm~m urgie. t ve The sintered rods were still porous and not wholly ductile. Z
403 MUM - -01pacts made of N% powde: were They were cold-worked, 5intered, again coLd-worked and, if
n5olidated by repeat
ed sintering and cold-working. TW nectssary,unnealed. Sunc of thesintered rMs were roujid-
-j Nb powder (size approx. 0.04
-0.8 mm.; rnalysis hammered (45" reduction) and.others culd-rolled
.06 1, C-a 0 .015, Cu 0 .016. Fe 0.107, Ag 0.045, N[n 0.078, ~ lc~j
AtO reductiun). Then the rods 'wert 5intercAl ugaits at
i
TI 0.033, 510,128, NI 0.01, Ta 1.97, C 0.088, 0 0.48, N during 45 min. Fr,)tn compacts obtained with -1 X 1 (0
0.10,HO.14)was pressM into rectangular corn pacts 6 x 6 X and 8 X IV g./sq. cm., resp., the following values ivve
100 mm. At specific pressures of 3 X 100 and I(P Z~/s
_4. qm. found: Af ter first sititering. d. 7 28, 7 A I g./cc.; pun,sit y
e
following values were found. porosity 39, 22%; -d. 15.9, 12.070; hardness HV 10: 48.1, -17.1; elec. reist~iwl
5*4 '6.8 g./cc.; elec. resistance 80, 12 ohms mm.s/In
10.243. 0-211 olkma 5q. jum./m.; and after the 3molld 161011-!
beni Y
ling strenph 0. 1.2 kg./sq, cm. Distinct sintering
ing: d. 8.28, 8.42, Porosit 4 2.8. elec. resistance U.~LJ,'
bepa at M . Tlie max. d. was "ached only at temps. '0.181. Tensile strength (kg./3q. Up. , elongation
near the m.p. At IdW* the compact% lost weljht through and elte. resistance (OhM - were: hamnlervd
evolution of CO caused by reaction of C and 0 In the metal,
wire, 1.2 mm. diam.; 70, 1.5, 0.170; cold-drawn wir
n er we S t os at
Ut is a ri e to the mm. d12M., unannealed: 00, 1.5, .1 t
hatiniierea wLre M: Fe 0.305. Ni 0 O.W 1. C~' o .
im -OW.C
&'volatilization of lower niobjurn oxides and of u
Optimal properties of the metid were obtained i All $1, Co. B4g, alkall metals traces; Mn, As, Ti Hil
64 at 2100" durHig ()0 min. aLA C ~008; S