Conclusions
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1.
Thermal stresses generated in hard alloy -U8 carbon steel welded joints as a result of the difference in linear expansion between these materials can be appriciably lowered by the use of iron shims of about 12% porosity.
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2.
Iron shims with a porosity of less than 12% can also be employed for the welding of hard alloys to U8 steel, but the welding operation must be followed by heat treatment.
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3.
At the hard alloy -Permalloy welded interface, the Permalloy component exhibits a transition layer consisting of solid solutions and chemical compounds formed from the elements present in the materials being welded.
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Translated from Poroshkovaya Metallurgiya, No. 10 (118), pp. 101–105, October, 1972.
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Mukha, I.M., Dovbishchuk, M.N. & Kal'nenko, B.I. Use of porous shims in the diffusion welding of hard alloys to steels. Powder Metall Met Ceram 11, 857–860 (1972). https://doi.org/10.1007/BF00844717
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DOI: https://doi.org/10.1007/BF00844717