BIMETAL ARTICLE MANUFACTURING METHOD Russian patent published in 2017 - IPC B23K20/14 B23K20/22 

FIELD: metallurgy.

SUBSTANCE: invention can be used for bimetal article manufacturing, made from cast intermetallic alloy based on Ni₃Al and age-hardened nickel alloy. Method involves stage of physical contact forming between bimetal workpieces due to nickel alloy workpiece deformation with production of semi-finished product and workpieces contact surfaces activation and setting stage due to part of nickel alloy semi-finished product deformation. nickel alloy workpiece deformation at physical contact stage is performed at rate of έ₁ at temperature of T₁, which are selected in accordance with said alloy grains size d in superplasticity intervals. Said part of semi-finished product deformation at activation and setting stage is performed at deformation rate of έ_2≥έ₁ at temperature of T₂, which are selected from condition T_SP>T₂>T*, where T_SP is least nickel alloy superplasticity temperature with grains size d, T* is temperature, at which flow stresses of nickel alloy with grain size d and intermetallic alloy are equal. Performing thermal treatment of produced bimetal article semi-finished product.

EFFECT: method provides increasing degree of workpieces contact surfaces activation and setting during pressure connection process.

7 cl, 5 dwg, 1 tbl