不锈钢/碳钢爆炸复合板消除应力热处理

THE HEAT TREATMENT OF THE RESIDUAL STRESS RELIEVED FOR EXPLOSIVE WELDED STAINLESS STEEL/CARBON STEEL CLADDED PLATE

为了消除爆炸焊接不锈钢／碳钢复合板界面的残余应力，对实验样品进行了消除应力热处理，并做了力学性能测试、显微硬度测量、扫描电镜分析和金相分析。结果表明，不论是否经过热处理，界面两侧的成分都有互扩散发生；热处理温度小于５５０℃时，力学性能、金相组织和显微硬度变化不大；热处理温度高于６５０℃时，硬度曲线下降到接近原材的硬度，但同时界面近区碳钢表层发生脱碳现象；热处理温度在７５０℃时，碳钢内部还发生相变。因此不锈钢／碳钢复合板的最佳热处理温度可能在６００℃左右。

The heat treatment of explosive welded stainless steel/carbon steel cladded plates were conducted in order to relieve the residual stress near the welded interface.The mechanical performences of the samples and the microhardness curves of both sides of interface were measured.The composition of both sides near the interface were analysed by the scanning electron microscope and the metalloscopy.The results indicate that whether the sample is heattreated or not,the compositions of both sides of the interface are diffused each other;When the heattreated temperature below 550℃,the mechanical propertives and hardness of the samples do not change much.When the temperature above 650℃,the hardness reduces but the decarburization of carbon steel in taken placed.At 750℃,the phase change is taken place in the carbon steel.Consequently,the optimum heattreated temperature is possibly 600℃.