304/Q235B热轧复合卷板的组织性能研究  

Research on Microstructure and Properties of 304/Q235B Hot Rolled Clad Steel Coil

作　　者：牛涛[1,2] 安成钢 吴新朗[3] 于晨[3] 张彩霞[3] 代晓莉[1,2] 

机构地区：[1]首钢技术研究院,北京100043 [2]北京市能源用钢工程技术研究中心,北京100043 [3]首钢股份公司迁安钢铁公司,河北迁安064404

出　　处：《新技术新工艺》2017年第5期8-11,共4页New Technology & New Process

摘　　要：采用力学试验、光学电镜(OM)、场发射扫描电镜(SEM)和能谱分析(EDS)等方法对工业热连轧生产304/Q235B热轧复合卷板的力学性能、显微组织以及接合面夹杂物与析出进行了分析,结果表明,热连轧生产的304+Q235B热轧复合卷板的力学性能、晶间腐蚀性能均满足技术要求,剪切强度良好。基板Q235B的显微组织为铁素体/珠光体类型,还含有少量贝氏体,覆层为典型的奥氏体类型,局部呈现孪晶形貌,接合面附近存在约40μm宽的脱碳层。接合面处存在少量小尺寸硅、锰的氧化物夹杂,伴随铬的碳化物附着析出;覆层不锈钢仅在晶界处有少量细微析出,保证了良好的耐晶间腐蚀性能。In this study, tensile test, optical microscopy （OM）, field emission scanning electron microscope （SEM）, and energy dispersion spectrum （EDS） are used to analyze the mechanical properties, microstructure and inclusions and pre- cipitates characteristics at the interface. Results show that 304/Q235B hot rolled clad steel coil manufactured using hot roll- ing line has a good performance in combined mechanical properties, intergranular corrosion property and shear strength. Mi- crostructure of Q235B mainly consists of ferrite and perlite, with a little amount of Bainite, while that of 304 stainless steel consists of deformed austenite with part of twin crystal morphology. There is a 40 μm wide decarburized layer near the in- terface, as well as a little amount of oxide inclusion containing Si and Mn, and carbide precipitates of Cr adhere to them. Only a small amount of Cr-containing precipitates has been found on the grain houndaries, which guarantees the good interg- ranular corrosion property of 304 stainless steel.

关 键 词：热轧复合卷板 显微组织 力学性能 接合面 析出 

分 类 号：TG142.1[一般工业技术—材料科学与工程]