李小兵,陈民,蒋国民,郑传波,镇凡,邵春娟,麻晗

• 1:江苏科技大学冶金工程学院
• 2:江苏省(沙钢)钢铁研究院

摘要(Abstract)：

研究了轧后控制冷却和回火处理对316L/Q370qE不锈钢复合板组织和性能的影响。采用金相显微镜、扫描电镜(SEM)、能谱仪(EDS)和背散射电子衍射仪(EBSD)分析复合板的显微组织,通过拉剪和拉伸试验测试复合板的界面结合强度和力学性能。结果表明:与水冷-空冷的冷却方式相比,轧后快速水冷至室温的不锈钢复合板脱碳层和渗碳层厚度分别减小至40和20μm;水冷加速碳钢发生低温转变,碳钢脱碳层组织为细晶铁素体和贝氏体,不锈钢渗碳层中的奥氏体晶粒细化,复合界面的拉剪强度显著提高;水冷复合板经回火处理后,复合界面的脱碳层和渗碳层厚度稍有增加,碳钢组织在500℃以上回火时转变为粗晶铁素体和回火索氏体,不锈钢奥氏体组织发生均匀化,复合界面剪切强度降低,但仍高于轧后水冷-空冷的复合板;轧后水冷至室温后再经450℃回火1 h制备的不锈钢复合板具有较好的综合力学性能,界面拉剪强度为364 MPa,屈服强度和抗拉强度分别为594和661 MPa,断后伸长率为18%。

关键词(KeyWords)： 不锈钢复合板;热轧复合;热处理;界面;脱碳层

Abstract:

Keywords:

基金项目(Foundation): 江苏省自然科学基金(BK20210889);; 江苏省研究生实践创新计划项目(SJYC24＿2615);; 张家港市科技计划项目(ZKYY2412)

作者(Author): 李小兵,陈民,蒋国民,郑传波,镇凡,邵春娟,麻晗

DOI: 10.13289/j.issn.1009-6264.2024-0490

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