耐食アルミニウム合金加工硬化材の MIG 溶接における軟化域
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概要
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When work hardened materials of corrosion-resistant aluminum alloy are welded, the hardness increased by the cold working is softened partially welding heat. and also the mechanical strength locally is reduced and then the joint efficiency falls naturally. Therefore, in this investigation, the author inquired into the generating condition of softened zone using A2P7-1/4H work hardened materials of 0.5cm thick plate and simultaneously investigated about the countermeasure for the falling of the strength of the joint by the generation of the softened zone. The author measured the thermal cycle in each point of heat affected zone and made sure that the softened degree by welding heat was depended upon the degree of the influence of the heating largely on the peak temperature. Consequently, in this experiment the author found that the softening began at about 300℃ and proceeded gradually beyond this temperature and then completed perfectly at about 500℃; and also width of softened zone was increased and the strength of the joint was reduced proportionally to the welding heat. The author made clear that to raise the joint efficiency up to 100 per cent without falling of the strength of the joint in welding the width of the softened zone ought to be kept under 0.8cm; from the relation of the width of the softened zone and the strengrh of joint. Next, the author tried an improvement of the strength of the joint by PEENING method, and consequently made clear that this PEENING method was comparatively way.
- 1965-03-25
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関連論文
- 耐食アルミニウム合金加工硬化材の MIG 溶接における軟化域
- (63) 耐食アルミニウム合金加工硬化材の MIG 溶接における軟化域の問題(第 2 報) : 軟化域の発生による継手強度低下にたいする対策について(昭和 39 年度春季全国大会講演概要)
- (62) 耐食アルミニウム合金加工硬化材の MIG 溶接における軟化域の問題(第 1 報) : 軟化域の発生条件について(昭和 39 年度春季全国大会講演概要)