【摘要】 通过对称组坯和真空热轧技术,成功制备了不锈钢复合板,其界面过渡层主要包括脱碳层、界面和渗碳层,这主要是由于在温度和压力作用下,合金元素相互扩散所造成的。通过弯曲测试发现界面结合较为优良,无脱层裂纹存在。通过弯管和焊接工艺,获得焊接接头优良的不锈钢复合管,其焊缝、熔合区和热影响区无宏观和微观缺陷存在,不锈钢层热影响区晶粒较为粗大,随着离焊缝距离的减小,碳钢层组织由不完全重结晶区转变为完全重结晶区,又过渡至粗晶区,而不锈钢焊缝随着离熔合区距离的增加,由少量的平面晶转变为胞状晶,最后转变为树枝晶。更多还原

【Abstract】 The stainless steel clad plate was successfully fabricated by laying- up symmetric and vacuum hot rolling. The interfacial transition zone contains decarburized layer,interface and carburized layer,which is attributed to the diffusion of alloy element at the interface under the high pressure and temperature condition. The bending test reveals a prefect interface presented in the clad plate,without obvious delamination crack. The stainless steel clad pipe with excellent welded joint can be obtained by elbow and welding. There are no macroscopic and microscopic defects in the weld zone,fusion zone and heat affected zone. The heat affect zone of stainless steel layer is comprised of coarse grain,whereas the heat affect zone of carbon steel layer contains coarse grain area,completely recrystallized zone and partial recrystallized zone. With the increase of distance between weld zone and fusion zone,the small plane grain changes into a cellular crystal grain,and finally into a dendrite in the stainless steel weld zone.更多还原