回火温度对轧后直接水淬15CrMoV钢组织和力学性能的影响  

Effect of Tempering Temperature on Structure and Mechanical Properties of Steel 15CrMoV Direct-Water-Quenched after Finishing Rolling

作　　者：关婧[1] 蔡庆伍[1] 武会宾[1] 焦多田[1] 刘小林[2] 冉旭[1] 

机构地区：[1]北京科技大学高效轧制国家工程研究中心,北京100083 [2]新余钢铁有限责任公司,新余338001

出　　处：《特殊钢》2009年第2期66-67,共2页Special Steel

基　　金：国家自然基金资助项目(50671016)

摘　　要：试验用钢15CrMoV(%:0.15C、0.29Si、0.57Mn、1.01 Cr、0.37Mo、0.24V)16 mm板材的终轧温度为900～950℃,轧后在880～900℃水淬,并经670～800℃回火。结果表明,试验钢在线淬火后的组织为马氏体+贝氏体,随回火温度升高,钢中碳化物析出量增加,贝氏体板条束逐渐合并和减少,最终转化为碳化物+多边形铁素体组织;在730～780℃回火,15CrMoV钢具有良好的综合力学性能,抗拉强度680～760 MPa,冲击功55～130 J。Finishing roiling temperature of 16 mm plate of test steel 15CrMoV （% ： 0. 15C, 0. 29Si, 0. 57Mn, 1.01Cr, 0. 37Mo, 0.24V） was 900 -950℃, then the rolled plate was direct-water-quenched at 880 -900℃, and tempered at 670 - 800℃. Results showed that the structure of test steel after in-line quenching was martensite ＋ bainite, with increasing tempering temperature, amount of precipitated carbides increased, and bainite lath was gradually merged and finally transferred to carbide ＋ polygonal ferrite structure; with tempered at 730-780℃, the steel 15CrMoV had excellent comprehensive mechanical properties with tensile strength 680- 760 MPa and impact energy 55 -130J.

关 键 词：15CrMoV钢 在线淬火 回火 贝氏体 

分 类 号：TG161[金属学及工艺—热处理] TQ325.14[金属学及工艺—金属学]