镇凡,刘静,黄峰,邵春娟,曲锦波,李小兵

• 1:武汉科技大学省部共建耐火材料与冶金国家重点实验室
• 2:江苏省(沙钢)钢铁研究院
• 3:江苏科技大学冶金与材料工程学院

摘要(Abstract)：

利用Gleeble-3800热模拟试验机制备了316L/Q420不锈钢复合板试样，采用拉伸试验、显微硬度仪、光学显微镜、扫描电镜、能谱仪和电子探针等研究了变形率对316L/Q420不锈钢复合板界面结构和结合性能的影响。结果表明：316L不锈钢复层组织为奥氏体，Q420基层组织为贝氏体(B)+少量针状铁素体(AF),脱碳层(DL)组织为贝氏体(B)+多边形铁素体(PF)+少量针状铁素体(AF)。界面区域由渗碳层(CL)、过渡层(TL)和脱碳层(DL)组成，各层硬度分布规律为过渡层>渗碳层>脱碳层。原始界面(OI)上存在孔洞和SiMn氧化物，随着变形率增加，其形貌由不连续线状转变为球状颗粒，比例由36%降低至4%,渗碳层、过渡层和脱碳层的厚度逐渐降低，晶粒得到细化，过渡层的硬度峰值增加，复合板的抗拉强度先增加后趋于稳定，伸长率增加。复合板界面存在元素扩散行为，随着变形率的增加，Cr、Ni、C等元素的扩散层厚度逐渐减小。

关键词(KeyWords)： 不锈钢复合板;316L不锈钢;Q420低合金高强钢;变形率;复合板界面;结合强度

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51871171);; 江苏省自然科学基金(BK20210889)

作者(Author): 镇凡,刘静,黄峰,邵春娟,曲锦波,李小兵

DOI: 10.13289/j.issn.1009-6264.2022-0289

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