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By N. F. Kazakov

Diffusion Beading of fabrics is an try and pool the event in vacuum diffusion bonding collected by means of a couple of mechanical engineering works, study institutions, and faculties. The publication discusses the valuable bonding variables and advised strategies for diffusion bonding in vacuum; the apparatus for diffusion bonding and construction expense; and the mechanization and automation of apparatus. The textual content additionally describes the diffusion bonding of steels; the bonding of forged iron and forged iron to metal; and the bonding of multiple metals and alloys. The bonding of refractory and lively metals and their alloys; the bonding of high-temperature alloys, nickel and nickel alloys; and the bonding of cemented carbides and of a cemented carbide to metal also are thought of. The ebook extra tackles the fix and reconditioning by means of diffusion bonding; the bonding of porous fabrics; and diffusion metallurgy. The textual content additionally encompasses nonmetals and their becoming a member of to metals; qc of diffusion-bonded joints; twist of fate prevention; and cleanliness in vacuum diffusion bonding.

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Metallographic analysis of joints between steel-20 (av. 20% C) and Ml copper, made by diffusion bonding in vacuum, shows that the surface of the joint is different in structure. Neither metallographic analysis nor X-ray microspectrometry can reveal any noticeable diffusion zone, and the bond occurs along grain boundaries. From an analysis of joints in 12X18H10T steel and 310 silicon sheet steel it is seen that the former has a higher microhardness. On the 310 steel side, grain growth is observed.

KAZAKOV, N. F. Diffusion Bonding in Vacuum. Mashinostroyeniye, Moscow, 1968 (in Russian). 8. KAZAKOV, N. F. The Formation of a Joint in Diffusion Bonding. "Svarochnoye proizvodstvo", 1973, No. 9, pp. 48-50 (in Russian). 9. KAZAKOV, N. F. Diffusion Bonding of Materials. Mashinostroyeniye, Moscow, 1976 (in Russian). 10. KONYUSHKOV, G. , KOPYLOV, Yu. N. Diffusion Bonding in Electronics. Ed. by N. F. Kazakov. Energiya, Moscow, 1974 (in Russian). 11. KOCHERGUIN, K. A. Pressure Welding. Mashinostroyeniye, Leningrad, 1972 (in Russian).

At the interfaces they form layers which interrupt the continuity of concentrations. The point is exemplified by a vacuum diffusion-bonded joint between specimens of CT3 steel and aluminium, 20 mm in diameter and 30 mm high. On the microsection, the intermetalhc layer stands out as a continuous white stripe separating the two parent metals. 5 /xm of the bond zone 72, and at the intermetalhc interface, 2 120. The original microhardness of CT3 steel is 107 Vickers, within 4μπι it is 165 Vickers, HV 1 2 J 4 _%£\Λ=I 5/ ^/ 200 FIG.

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