SCIENTIFIC ABSTRACT SIDOCHENKO, T. - SIDORENKO, A.K.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R001550420019-4
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: March 14, 2001
• Sequence Number: 19
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

`~ iPOC 'HEzNK0 T~ ~ i a r-'L , r-,,:~(-,gr a f , nau.-zq UP "f ENA, B.R .
Wed'.-her fcree~as'-, for the U.S.S.R. in October 1965. Meteor,
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I gid-ci. no,110;~.n3ert 1-4 0 165. (MIRA 1839)
1. TSentrallayy inatltuL pr,~)gnczov.

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ACC NRi AP6032055 SONCE CODL: UR/01h8/66/000/009/0158/ol6l
AUVOR: Yuafina. L. I.; Min.kqvich_, A. ~.; Raatore,~yp L. Ni Sidokhina, N. B.
. _yL_ Z:;- 3 JI
ORG: Moscow Institute of Steel and Allo s_(Mookovskiy inatitut stali i splavov) U
TITLE.: Producing nickel boride and cobalt boride layery on iron
SOURCE: IVUZ. Chernaya metallurgiya, no.. 9, 1966, 158-161
TOPIC TAGS: nickel compound, coball compound, x ray diffraction analysis, micro-
hardening, boride r
ABSTRACT: The authors plated the surfaces of Armco iron specimens with a 70-100 v
thick layer of nickel and cobalt. These specimens were tested for 1-6 hours at'9500C
in a bath composed of 60% molten borax and 40~ carbide or in a melt of borax using
electrolysis. A thick boride layer was formea on all specimens which went through the
first bath under all processing conditions. The thickness of the boride layer in-
creases with time of treatment. After holding from 1 to 3 hours, the nickel boride
layer still consists of one zone. After 4 h6urs of holding, two zones appear in the
layer. X-ray diffraction analysis shows that these zones correspond to N13B2 and
Ni2B. This process is much quicker in the case of electrolytic plating. The inter-
mediate layer cannot be observed after 3 hours of holding. A figure is given showing
the microhardness of all the phases formed in the surface layers. A study of the
boride layer shows an acicular microstructure. The length of the boride needles
-Card

,T 09133-67
ACC NRI A!; 6 0-3 2- -0 5-5
Naries, and in some places they pierce both the cobalt layer and the iron. X-ray dif-
fraction analysis shows that the cobalt content at the surface is 91-92% in those
places where the boride needles do not penetrate the iron. Cobalt concentration ap-
proaches 100% at a given distance from the surface and then decreases sharply. This
shows that cobalt penetrates iron to a depth of 10 p which cannot be observed in
studying microstructure or microhardness. A completely different picture is seen
where the needles penetrate the entire cobalt layer. The microhardness of these need-
les varies along their entire length. At the surface their microhardness is from
1250-158o kg/mm2 and 1680-2050 kg/mm2 at their ends. Iron content at the ends of the
needles reaches 92-88%. At the same time, cobalt content in these places is only 10-
2%. As can be seen, the boride needles which penetrate the iron mainly represent
boride with admixtures of cobalt and iron. Iron content diminishes in the boride
toward the surface, the needles consisting basically Of C02B. On the other hand,
Fe2B is found in the specimens in the center layer. Orig. art. has: 5 figures.
SUB CODE: ll/ SUBM DATE: 15Feb66/ ORIG REF: 005/ OTH REF: 001

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HAVAS, Gheorghe, ing., laureat al Premiului de Stat; MINGULESCU, Aristotel, ing.
SIDON, Andrei, Laureat al Premiului de Stat
Elaboration of a technological process for the production
of box calf with rectified right side by means of bovine
leather over 25 kg. Industria Usoara. 8 no.2:42-46 F 161.

SIDON, Andrei, laureat al Premiului de Stat
Bovine hide liming. Industria usoara 9 no.10:434-436 0 162.

SIDON, Andrei, laureAt al Prerdului de Stat
Dry6-warm. tannage of upper leather with chrome salts. Industria
usoara 10 n0.3;88-91 Rr 163,
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SIDONI Andrei, iaureat al Premiului do Stat
Method of tanning sole leather with chromium-tannin-syntan. Industria
usoara 11 no.2;57-59 F -64,

S. Uber arthagonale En"xicithingen. Acta Univ.
lect. Sri. Math. 10. 206-25,; (19,13). [.I~j ji- 1(.748] rVor a sinjilar r"tift. see J; 11
i farcliikle'wicz, Studill Math' 8,
Thi~ -w-27 (1939).]
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