To provide a fusion-bonded product capable of maintaining required strength of a bonded portion while having a high-strength part of required precision.
The fusion-bonded product having a high- strength part, comprises: a first preform constituted by integrally, frictionally pressure-welding a first low-carbon steel part made of low-carbon steel containing less than 0.45% of C and a high-carbon steel part made of high-carbon steel containing not less than 0.45% of C; and a second preform having a second low-carbon steel part made of second low-carbon steel containing less than 0.45% of C. The high-carbon steel part of the first preform is provided with a high-strength part that has been previously formed into a desired shape and quenched, the second low-carbon steel part of the second preform has been previously formed into a predetermined shape, and the first low-carbon steel part of the first preform and the second low-carbon steel part of the second preform are bonded to each other by fusion welding.
KUWANOTE TAKASHI
| JP2004528521A | 2004-09-16 |
Hiroyuki Nagai
Junpei Okada
Hirohito Katsunuma
Katsuomi Isogai