Cr-Mo-V系高铁制动盘用钢的热力学研究  

Thermodynamic of Cr-Mo-V steel for high-speed railway brake discs

作　　者：吴丹[1] 王福明[1] 王程明[1] 冯亚丽[1] 李长荣[2] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]北京科技大学材料科学与工程学院,北京100083

出　　处：《材料热处理学报》2016年第8期228-233,共6页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(51174020;51374018);国家高技术研究发展计划资助项目(2013AA031601)

摘　　要：采用Thermo-Calc热力学计算软件,对高铁制动盘用钢在400-1600℃存在的平衡析出相进行了热力学计算,并研究了合金元素对析出相和A3点温度的影响。结果表明,制动盘用钢中主要析出相为MX、MC、M23C6和M7C3,其中M为Cr、Fe、Mn、Mo、V等,X为C、N和空位Va。C、Mn、Cr、Ni元素会降低A3点温度,而Si、Mo、V能提高A3点温度。综合考虑,适当降低C、Mn、Ni和Cr的含量,提高V、Mo的含量,以增加MX、MC的含量和提高钢的A3点温度,从而提高制动盘用钢的力学性能。Equilibrium precipitation phases in Cr-Mo-V steel for high-speed railway brake discs at 400-1600 ℃ were calculated using thermodynamic software Thermo-Calc.The influence of alloying elements on the equilibrium precipitation and A3 point temperature of the steel was investigated.The results show that the main equilibrium precipitation phases in the brake disc steel are MX,MC,M23C6 and M7C3（M = Cr,Fe,Mn,Mo,V; X = C,N and vacancy）.The elements of C,Mn,Cr and Ni can reduce the A3 point temperature,on the contrary,Si,Mo and V increase the A3 temperature.Considering the calculated results comprehensively,appropriate reduction of C,Mn,Ni and Cr contents and increase of V and Mo contents enhance the amounts of MX,MC and increase the A3 point temperature,which can improve the mechanical performance of the brake disc steel.

关 键 词：制动盘用钢 析出相 热力学 A3点温度 

分 类 号：TG142.1[一般工业技术—材料科学与工程]