| 摘要 |
PURPOSE:To obtain a blanking punch for cold working having excellent toughness,abrasion resistance, etc., by applying a beam having a blurred focus to the joint surface of a high-C steel material and a sintered alloy then irradiating the focused beam to the welding surface. CONSTITUTION:A high-energy beam having a blurred focus is irradiated to a steel material 2 contg. >=0.5% C and a sintered alloy 1 side within the <=2mm. range from the joint face 3 in tight contact with the alloy 1 while the materials to be welded are rotated, in welding of said material 2 and the alloy 1. The energy required for obtaining welding depth is irradiated to the joint surface by throttling the beam diameter in the welding stage. The blanking punch having excellent strength, toughness, resistance 20 repeated fatigue failure, etc. is obtained without generation of any crack in the alloy 1 of the joint face 3. |
