Abstract: The stainless steel/carbon steel chips composite plates were prepared by the method of pressing at room temperature and three passes of vacuum hot rolling with the reduction rate of 40%, 40% and 50%, respectively. The relationship between the pressing forces at room temperature and the relative density of carbon steel chips was studied. The mechanics properties and microstructure of the composite plates with relative density of carbon steel chips 50%, 60%, 70% and 80% were analyzed before rolling. The results show that the brittle inclusions formed at the combined interfaces of the composite plate with 50% relative density of carbon steel chips before rolling hinder the diffusion of Cr, the composite plates do not produce metallurgical bonding, and the bonding strength is lower than the national standard of China. Inclusions at other relative densities are crushing, the composite plate meet the requirements, and the greater the relative density of carbon steel chips, the thicker the decarburization layers of the carbon steel chips layers, the better the metallurgical bonding effectiveness of the composite plates. There are no obvious inclusions at the combined interfaces of composite plates with a relative density of more than 70%. The composite plates with relative density of 70% have the highest tensile strength, reaching 589.97 MPa; the composite plates with relative density of 80% have the best elongation, which is 56.51%.

Key words: stainless steel / carbon steel chips composite plate, carbon steel chip density, vacuum rolling, microstructure, mechanics property

摘要： 利用室温压制、三道次真空热轧(压下率分别设置成40%、40%、50%)的方法制备了不锈钢/碳钢屑复合板，研究了室温下压制力和碳钢屑密度的关系，分析了碳钢屑轧制前相对密度分别为50%、60%、70%、80%的复合板力学性能以及微观组织。研究结果表明：碳钢屑轧制前相对密度为50%的复合板界面生成了脆性夹杂物而阻碍Cr元素的扩散，复合板未产生冶金结合，结合强度低于国家标准；其他相对密度情况下夹杂物被碾碎，复合板达到要求，并且碳钢屑的相对密度越大，碳钢屑层的脱碳层越厚，复合板冶金结合的效果越好，相对密度70%以上的复合板结合界面没有明显的夹杂物。相对密度70%的复合板抗拉强度最大，达589.97 MPa；相对密度为80%的复合板延伸率最佳，达56.51%。

关键词: 不锈钢/碳钢屑复合板, 碳钢屑密度, 真空轧制, 微观组织, 力学性能