Si含量对冷作模具钢Cr8Mo2SiV组织和性能的影响  

Effect of Si Content on Structure and Properties of Cold Work Die Steel Cr8Mo2SiV

作　　者：李冬丽[1,2] 马党参[2] 迟宏宵[1,2] 詹肇麟[1] 康爱军 

机构地区：[1]昆明理工大学机电工程学院,昆明650093 [2]钢铁研究总院结构材料研究所,北京100081 [3]东北特殊钢集团,抚顺113001

出　　处：《特殊钢》2010年第2期57-59,共3页Special Steel

基　　金：国家十一.五科技支撑计划项目资助(2007BAE510B04)

摘　　要：研究了Si含量对25 kg真空感应炉冶炼的Cr8Mo2SiV钢(%:0.96～0.97C、0.31～0.36Mn、7.98～8.04Cr、2.01～2.08Mo、0.31～1.52Si、0.20V)组织和力学性能的影响。结果表明,随着Si含量的增加,共晶碳化物尺寸变大,数量增多,淬火峰值硬度向高温区移动;经1 030℃淬火,550℃回火后,随着Si含量的提高,Cr8Mo2SiV钢的二次硬化能力和冲击韧性明显提高。Cr8Mo2SiV钢最佳的Si含量为1.5%。The effect of Si content on Structure and mechanical properties of steel CrMo2SiV （ %：0.96-0.97C,0.31～0.36Mn,7.98-8.04Cr,2.01-2.08Mo,0.31～1.52Si,0.20V） melted by a 25 kg vacuum induction furnace has been studied. Results show that with increasing Si content the size and amount of eutectic carbides in steel increase and the peak hardness of quenched steel moves to higher temperature region ; and with increasing Si content the secondary hardening ability and impact toughness of steel Cr8Mo2SiV quenched at 1 030 ~C and tempered at 550℃ obviously increase. The optimum Si content in steel Cr8Mo2SiV is 1.5%.

关 键 词：冷作模具钢Cr8Mo2SiV Si含量二次硬化冲击韧性 

分 类 号：TG142.4[一般工业技术—材料科学与工程]