郭林坡,包晔峰,谢秉錡,柳昱,王子睿,曹冲,许楠,宋亓宁

• 1:河海大学机电工程学院

摘要(Abstract)：

采用光学显微镜、扫描电镜、动电位扫描试验及点蚀浸泡试验研究了时效处理对含Cu双相不锈钢堆焊层组织及耐蚀性能的影响。结果表明,经1170℃固溶后,两种双相不锈钢堆焊层主要由铁素体相(α)、奥氏体相(γ)和少量MnO·Cr_2O_3氧化物组成。其中4Cu堆焊层试样经580℃时效60 min后,在α相中析出了尺寸约为1μm的ε-Cu相。Cu元素的添加促进了堆焊层试样钝化区的形成。此外,由于γ相相比α相具有更高的点蚀当量值,点蚀优先在α相中萌生,而点蚀的扩展则受到γ相的抑制。短时时效处理形成的大量富Cu团簇降低了堆焊层的点蚀性能,时效60 min后,由于富Cu团簇发生粗化转变为稳定的ε-Cu相,耐点蚀性能有所提高。

关键词(KeyWords)： 双相不锈钢;堆焊;时效处理;点蚀

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51879089)

作者(Author): 郭林坡,包晔峰,谢秉錡,柳昱,王子睿,曹冲,许楠,宋亓宁

DOI: 10.13289/j.issn.1009-6264.2021-0329

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