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2205双相不锈钢渗碳组织及性能研究

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Indexed by:期刊论文

Date of Publication:2017-01-01

Journal:热加工工艺

Included Journals:CSCD

Volume:46

Issue:20

Page Number:198-202

ISSN No.:1001-3814

Key Words:2205双相不锈钢; 渗碳; 固溶时效; 微观结构; 电化学腐蚀

Abstract:为了研究渗碳对2205双相不锈钢的显微组织、化学成分及性能的影响,对该钢进行了高温渗碳和固溶时效处理。结果表明:渗层由扩大的奥氏体和小块状铁素体
   组成。渗碳后奥氏体与铁素体内部有错综杂乱的位错缺陷,铁素体晶内有微量规则的析出相。再经过固溶时效处理,晶界处与晶内均有不同形状的碳化物析出。渗层
   的C、Cr含量升高,Fe含量降低,且渗层铁素体中的Cr、Mo含量要高于心部铁素体。由于渗层的奥氏体固溶了较多的碳元素,渗层的硬度高于心部组织,硬
   度从表面到心部有缓慢的过渡;渗碳前后耐蚀性未发生明显变化。

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