多元低合金耐磨钢镶嵌硬质合金工艺的研究  

Study on the Process of Multi-Element Low Alloy Wear-Resistant Cast Steel Embedding WC-Based Hard Alloy

作　　者：李亚敏[1] 路王珂[1] 赵彬 于根杰 孙玉福[1] LI Ya-min LU Wang-ke ZHAO Bin YU Gen-jie SUN Yu-fu(School of Mechanical and Electronic Engineering, Xinlian College, Henan Normal University, Zhengzhou 450000, Henan, China Luoyang Institute of Special Materials Research, Luoyang 471023, Henan, China)

机构地区：[1]河南师范大学新联学院机电工程学院,河南郑州450000 [2]洛阳特种材料研究院,河南洛阳471003

出　　处：《铸造》2017年第2期145-149,共5页Foundry

摘　　要：针对立磨机磨辊易磨损的问题,采用双金属复合铸造技术,以ZG32MnCrMoNi多元低合金耐磨钢为基体材料,碳化钨基硬质合金为镶嵌材料,研究了多元低合金耐磨钢镶嵌硬质合金工艺对结合界面、组织和性能的影响。结果表明:镶嵌体积比为1.1:10,浇注温度为1 550~1 570℃时,镶嵌试块底面质量良好,多元低合金钢基体与硬质合金的结合方式为冶金结合。镶嵌试块经900℃正火+900℃淬火+300℃回火热处理后,多元低合金耐磨钢基体材料的抗拉强度为1 547 MPa,伸长率为6.0%,冲击韧度为17.9 J/cm^2,硬度为HRC46.2,硬质合金的硬度为HRC73.5,在保证基体材料强韧性的同时,显著提高了试样的耐磨性。Aiming at the problem of vertical grinding machine roller wearing easily, the bimetal composite casting technology was used, in which multi-element low alloy wear-resistant steel ZG32MnCrMoNi was used as based material and the WC-based hard alloy as inlay material. This paper mainly studied effects of damascene process of hard alloy inlay multi-element low alloy wear-resistant cast steel on interface, microstructure and properties. The results show that when the ratio of volume ratio was 1.1：10 and the pouring temperature is 1 550 - 1 570 ~C, the quality of embedded test block undersurface was good and the combination of low alloy steel matrix and hard alloy was metallurgical combination. After the mosaic test block was heat treated by normalizing at 900℃ ＋quenching at 900℃ ＋tempering at 300 ℃, the tensile strength, elongation, impact toughness and hardness of matrix material are respectively 1 547 MPa, 6.0%, 17.9 J/cm2 and HRC46.2, and the impact toughness of embedded material was HRC73.5. While ensuring the strength and toughness of the matrix material, the wear resistance of the sample was improved obviously.

关 键 词：ZG32MnCrMoNi 碳化钨基硬质合金 镶嵌 结合界面 力学性能 

分 类 号：TG24[金属学及工艺—铸造]