回火温度对4Cr5MoSiV1钢组织和性能的影响  

Effect of tempering temperature on microstructure and properties of 4Cr5MoSiV1 steel

作　　者：田玉新[1] 陆明和[1] 李悦[2] 

机构地区：[1]宝山钢铁股份有限公司,上海201900 [2]宝钢特钢有限公司,上海200940

出　　处：《金属热处理》2016年第4期41-45,共5页Heat Treatment of Metals

摘　　要：采用光学显微镜、体视显微镜和扫描电镜,并结合性能测试,研究了不同回火温度对4Cr5Mo Si V1钢组织和性能的影响。结果表明,随回火温度的提高,组织中马氏体含量减少,逐渐转变为回火索氏体,同时伴随着碳化物和铁素体相的聚集和长大,从而导致钢的强度与硬度降低,而塑性与韧性升高。4Cr5Mo Si V1钢在1080℃淬火,640℃回火,可获得最佳的强韧性配合及良好的抗热疲劳性能。Effect of different tempering temperature on microstructure and mechanical properties of 4Cr5 Mo Si V1 steel was analyzed by optical microscopy,stereomicroscope, SEM and mechanical property testing,respectively. The results show that with increasing tempering temperature,martensite content decreases and martensite transforms gradually to tempered sorbite,accompanying with aggregation and growth of carbide and ferrite. These changes result in an decrease of hardness and strength,but increase of plastic and toughness. Optimal performance can be obtained after quenching at 1080 ℃ and tempering at 640 ℃.

关 键 词：4CR5MOSIV1钢 回火温度 组织 力学性能 热疲劳 

分 类 号：TG113.12[金属学及工艺—物理冶金] TG113.25[金属学及工艺—金属学]