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Affiliation of Author(s):

冶金工程学院

Journal:

材料工程

Key Words:

焊后热处理;水下搅拌摩擦焊接;7A04铝合金;组织性能;

Abstract:

对7A04铝合金板进行水下搅拌摩擦焊接(Submerged Friction Stir Welding,SFSW),并对焊接接头进行焊后热处理(Post Weld Heat Treatments,PWHT),研究焊后热处理对接头组织性能的影响。结果表明:焊后热处理接头呈现出弥散分布的细小析出相形貌,明显优于SFSW接头呈现出的少量析出相分散分布的特征。与SFSW接头相比,焊后热处理明显改善接头的力学性能。接头焊核区的平均硬度值提高了39.7HV,抗拉强度提高了67MPa,达到母材抗拉强度的96.1%,接头的应变硬化能力增强,拉伸断口呈现微孔聚合和解理混合断裂特征。

First Author:

Kuaishe Wang,qiaoke,wangwen

Indexed by:

Journal paper

Correspondence Author:

郝亚鑫,徐瑞琦,李天麒

Translation or Not:

no

Date of Publication:

2016-06-20