Patent ID: 6037559
Filing Date: 2000-03-14
Classification: B23K

Abstract:
A process for lap-bonding of two types of metal members having different melting points by lapping a first metal member and a second metal member having a melting point higher than a melting point of said first metal member onto each other, and bonding resulting lapped areas to each other, said process including the steps of selecting an Al-based member having a planar portion as said first metal member and an Fe-based member having a planar portion as said second metal member; lapping the first and second metal members onto each other at said planar portions; pressing said lapped areas by a pair of electrodes and supplying a current between both the electrodes, thereby forming a recess on a bonded surface of said Al-based member by a deformation of the Al-based member through medium of a pressed and current-supplied portion of said Fe-based member; and bonding said pressed and current-supplied portion and said Al-based member to each other at said recess.