Structure of and method for laser welding metal members and fuel

Details Structure of and method for laser welding metal members and fuel Structure of and method for laser welding metal members and fuel

1998-12-11

2000-12-19

Evans, Geoffrey S.

Electric heating

Metal heating

By arc

25112921, 428594, 428685, B23K 2622, F16K 3102, F02M 5106

Patent

active

06163011&

ABSTRACT:
A first member (11) and a second member (12) of metal materials of different kinds are overlapped one upon the other, and the surface of the first member (11) is irradiated with a laser beam to form a melt-solidified portion (2). The melt-solidified portion (2) has a nearly inverted triangular shape in cross section becoming gradually narrow toward the inside from the front surface side of the first member (11), and has a low-hardness layer (21) on the front surface side and a high-hardness layer (22) on the inside. The high-hardness layer (22) has a welded structure in which first layers (23) and second layers (24) having a hardness smaller than that of said first layers (23) are alternatingly laminated in the direction in which the welding proceeds.

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