Nb含量对W3Mo2Cr4V(Nb)高速钢组织和力学性能的影响  

Effect of Nb Content on Structure and Mechanical Properties of High Speed Steel W3Mo2Cr4V (Nb)

作　　者：张永[1,2] 马党参[2] 刘建华[2] 陈再枝[2] 雍岐龙[1,2] 

机构地区：[1]昆明理工大学材料与冶金工程学院,昆明650093 [2]钢铁研究总院结构材料研究所,北京100081

出　　处：《特殊钢》2007年第3期44-46,共3页Special Steel

摘　　要：研究了0～1.5％Nb对25 kg真空感应炉冶炼的W3M02Cr4V钢(％:0.8～1.1C、3.8～4.1Cr、2.9～3.2W、1.8～2.1Mo、1.0～1.3V)组织和力学性能的影响。试验结果表明:随着Nb含量提高,铸态组织中铌碳化物增多;淬火奥氏体晶粒变细;1180℃淬火时,1.2％～1.5％Nb钢比≤0.1％Nb钢HRC值提高了6.0;二次硬化能力和红硬性也得到了提高;使钢在较高淬火温度下的机械性能得到改善。The effect of 0 -1.5 % Nb on structure and mechanical properties of steel W3 Mo2Cr4V （0. 8 - 1.1 C, 3.8 -4, 1Cr, 2. 9 -3.2W, 1.8 -2. 1Mo, 1.0 -1.3V） melted by 25 kg vacuum induction furnace has been studied, Test results showed that with increasing Nb content the amount of niobium carbide in cast structure increased ; quenching austenite grain was refined; as quenched at 1 180 ℃, compared with HRC value of ≤0. 1% Nb steel the HRC value of 1.2% - 1.5% Nb steel increased by 6. 0 ; the secondary hardening ability and red hardness of Nb steel were obviously increased ; and the mechanical properties of Nb steel quenched at higher temperature improved.

关 键 词：含Nb高速钢W3M02Cr4V 二次硬化 力学性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TF133.2[金属学及工艺—金属材料]