Patent ID: 9604307
Date: 2017-03-28
CPC Classifications: B23K,B32B,Y10T

Claim:
1. A method of manufacturing a composite metal material which includes a first metal member made of first metal and a second metal member made of second metal having a smaller linear expansion coefficient than first metal, the method comprising in the following order: a metal member preparation step of preparing the first metal member, and a plurality of divided members which are made of second metal and form a first metal member accommodating portion capable of enclosing the first metal member when assembled to each other; an assembling step of assembling the plurality of divided members to each other in a state where the first metal member is arranged in the first metal member accommodating portion thus forming an assembled body; and a bonding step of, by applying a first temperature and a first pressure which enable the respective metal materials to be bonded to each other to the assembled body, bonding the plurality of divided members to each other thus forming the second metal member, and also of bonding the first metal member and the second metal member to each other, wherein the respective divided members of the plurality of divided members are respectively separate pieces, the first pressure is applied from the outside of the assembled body, and the first metal member is expanded by the first temperature which causes the first metal member to expand outward against the second metal member, causing the first metal and second metal member to be bonded together.