车刀用W_2C颗粒增强Fe基复合材料组织和性能分析  

Analysis of Microstructure and Mechanical Properties of W_2C Particle Reinforced Fe Matrix Composite Materials Used in Turning Tool

作　　者：姜小丽[1] 吴贵军[2] 

机构地区：[1]冀中职业学院机电工程系,河北定州073000 [2]安阳工学院机械工程学院,河南安阳455000

出　　处：《热加工工艺》2017年第24期162-164,共3页Hot Working Technology

摘　　要：利用直流电弧原位冶金技术制备W_2C颗粒增强Fe基复合材料。通过物相分析、显微组织观察和力学性能测试,研究车刀用W_2C颗粒增强Fe基复合材料的组织和力学性能。结果表明:复合材料的物相组成为WC、W_2C和(Fe,Ni),花状枝晶含有大量的C和W,是固溶了Cr的W_2C;Fe基固溶体与M_7C_3共同构成的菊状共晶结构。W_2C颗粒增强以后,复合材料的拉伸强度、屈服强度、伸长率分别为248.3 MPa、188.6 MPa和12.8%,硬度为61.8 HB。复合材料拉伸断口存在少量撕裂棱以及大量韧窝结构,呈现微孔聚集性断裂特征。The W2C particle reinforced Fe matrix composite material was prepared by using Dc arc in situ metallurgy technology. And the microstructure and mechanical performance analysis of WEC particle reinforced Fe matrix composite materials were analyzed by phase, microstructure observation and mechanical performance test. Results show that the phases of composite material are composed of WC, W2C and （Fe, Ni）, the flower dendrite contains a large number of C and W, which is W2C with Cr dissolving; Fe based solid solution and M7C3 constitute foliated eutectic structure. After the W2C particle reinforcement, the tensile strength, yield strength, elongation of the composite material are 248.3 MPa, 188.6 MPa and 12.8, respectively, the hardness is 61.8 HB. A small number of torn edges and a large number of dimples appear in the tensile fracture of composite material, which present the microporous gathered fracture characteristic.

关 键 词：FE基复合材料 W2C颗粒 组织 性能 

分 类 号：TB333[一般工业技术—材料科学与工程]