回火处理对挤压轮用H13钢组织性能的影响  

Effect of Tempering Treatment on Microstructure and Properties of Forged H13 Steel

作　　者：徐寒晓 王延辉[1] 燕云[2] 

机构地区：[1]大连交通大学连续挤压教育部工程研究中心,辽宁大连116028 [2]抚顺特殊钢股份有限公司技术中心,辽宁抚顺113001

出　　处：《大连交通大学学报》2017年第1期112-116,共5页Journal of Dalian Jiaotong University

摘　　要：采用金相分析、冲击韧性试验、硬度试验及扫描电子显微镜等方法,对挤压轮用H13热作模具钢经不同温度以及不同回火次数处理后的组织演变和性能变化进行研究.结果表明,带状偏析、伪共晶组织的存在可以导致H13钢抗回火性能的下降.H13钢在相同回火次数的条件下,回火温度越高,硬度下降越多,即抗回火性能越差.在最终热处理过程中,应该采用高淬高回的热处理方式.The changes of microstructure evolution and property after different heat treatment process at different temperatures and different numbers of tempering of the extrusion wheel with H13 hot-work die steel were studied by using metallographic analysis, impact toughness test, hardness test,SEM and other methods. The resuhs slmw that the existence of zonal segregation and pseudo eutectic organization can make the properties of tempering resistance of H13 steel declined. The more the higher tempering temperature is the more hardness is decreased,and the worse properties of tempering resistance of the H13 steel under the condition of same times of tempering. High temperature quenching and tempering heat treatment should be used in the process of the final heat treatment.

关 键 词：H13钢 抗回火性能 碳化物 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TG161[金属学及工艺—金属材料]