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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相扩散发生;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℃,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。
In order to eliminate the residual stress at the interface of the explosion welded stainless steel / carbon steel composite plate, the experimental samples were subjected to stress relief heat treatment, mechanical properties testing, microhardness measurement, SEM and metallographic analysis. The results show that the components on both sides of the interface diffuse into each other with or without heat treatment. The mechanical properties, microstructure and microhardness do not change much when the heat treatment temperature is less than 550 ℃. When the heat treatment temperature is higher than 650 ℃, the hardness curve decreases To close to the hardness of the raw material, but at the same time the surface of the interface near the carbon steel decarburization phenomenon; heat treatment temperature of 750 ℃, carbon steel internal phase transformation also occurs. Therefore, the optimal heat treatment temperature of stainless steel / carbon steel composite board may be around 600 ℃.