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焊接参数对铝/钢TIG熔钎焊接头组织及性能的影响

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Indexed by:Journal Papers

Date of Publication:2014-12-15

Journal:焊接

Included Journals:PKU、ISTIC

Issue:12

Page Number:20-24

ISSN No.:1001-1382

Key Words:铝/钢异种金属;熔钎焊;焊接参数;显微组织;力学性能

Abstract:采用AlSi12药芯焊丝在不同的焊接参数下进行了纯铝/不锈钢TIG熔钎焊试验,采用OM,SEM,EDS对接头微观组织及焊缝和界面层处所生成的相进行了分析,并测试了接头的力学性能.结果表明:当焊接电流为50A,焊接速度为60 mm/min时,接头抗拉强度为92 MPa,达到母材强度的73%,断裂在铝母材热影响区;在电弧力的作用下界面层呈现出两种形态:根部和中部界面层比较均匀而尾部界面层呈锯齿状,且焊缝中分布着片状和汉字状的相;界面层与片状和汉字状的相均为т5-Al7.4 Fe2Si.

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