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时效处理对AISI304钢接头组织和性能的影响

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Indexed by: Journal Article

Date of Publication: 2012-05-25

Journal: 焊接

Included Journals: ISTIC、PKU

Volume: 20

Issue: 5

Page Number: 28-31

ISSN: 1001-1382

Key Words: 奥氏体不锈钢;时效;焊接接头;σ相

Abstract: 研究了时效热处理对奥氏体不锈钢AISI304焊接接头组织和性能的影响.首先,分别采用E309 - 16和E310-15焊丝对AISI304不锈钢进行焊接,并对两种奥氏体不锈钢焊接接头进行750℃时效热处理,分析了不同时效时间对上述两种接头组织和性能的影响规律.结果表明:经过一定时间时效处理后两种接头焊缝的晶界处中均有硬而脆的金属间化合物σ相析出,并且σ相的数量及体积随时效时间的延长而增加;在相同时效条件下,σ相在E309-16接头中更易析出,在两种接头中σ相的形貌也不相同;σ相的形成破坏了接头的冲击韧性.

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