| 摘要 |
PROBLEM TO BE SOLVED: To perform the friction welding of a work formed of steel containing, by weight, >=0.2% C and >=1.2% Mn so that the hardness of a welded part is <=Hv 400, and the weld part is not broken in a bending test. SOLUTION: In this friction welding method in which at least one of two works 1A and 1B contains, by weight, >=0.2% C and >=1.2% Mn, the rotation stopping time T2 before the work 1A is stopped after deceleration thereof is started after the friction step is completed is set to be 0.7-1 second, and the press starting time TP2L before the pressing of the work 1A is started after deceleration thereof is started is set to be 0.4-0.6 second.
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