热轧不锈钢复合板界面组织与拉伸断裂的研究  

Study on interfacial morphologies and tensile fracture of hot-rolled stainless steel clad plates

作　　者：张心金 祝志超 刘会云 

机构地区：[1]中国第一重型机械股份公司天津研发中心,天津300457

出　　处：《武汉科技大学学报》2017年第6期408-414,共7页Journal of Wuhan University of Science and Technology

基　　金：国家高技术研究发展计划(863计划)资助项目(2013AA031302)

摘　　要：本文借助SEM、EDS和EPMA等分析了热轧不锈钢复合板界面组织及拉伸断口特征,结果表明:复合板结合界面存在元素扩散现象,不同元素扩散距离不同从而导致形成特殊带状组织;无Ni结合界面的拉伸断口呈沿晶断裂特征;含Ni结合界面因元素扩散受到抑制,拉伸断口呈韧性断裂特征,其界面抗剪强度相比无Ni结合界面虽有所下降,但仍远大于国标要求的210 MPa。拉伸断裂过程动态抓拍结果显示:复合板结合界面先发生曲折开裂,随后基层与复层发生不同步断裂。The interfacial microstructure and tensile fracture characteristics of hot-rolled stainless steel clad plates were analyzed by means of SEM,EDS,EPMA and so on.The results show that the diffusion of different elements with different diffuse distances exists around the interface,which leads to the formation of the special banded structure.The tensile fracture of clad plates without Ni interface is intergranular fracture and the ductile fracture occurs for the clad plates bearing Ni interface.Although the shear strength of Ni-bearing interface decreases compared with Ni-free interface,it is still much larger than 210 MPa required by the national standard.The tensile fracture process was captured by the camera,and it is found that the zigzag shape crack forms at the interface and then the fracture of base and clad layers occurs at different time points.

关 键 词：不锈钢复合板 真空热轧成形 界面组织 元素扩散 拉伸断裂 断口形貌 

分 类 号：TG142[一般工业技术—材料科学与工程]