粉末冶金技术2017，Vol.35Issue(3)：188-194,7.DOI:10.19591/j.cnki.cn11-1974/tf.2017.03.005
烧结温度对钴基耐磨合金微观组织和性能的影响
Effect of sintering temperature on microstructures and mechanical properties of Co-based wear-resistant alloy
梁锦奎 1侯星宇 2崔宇 1张洪宇 2张卫兵 3夏艳萍 3孙元 2金涛2
作者信息
- 1. 西安航空动力控制科技有限公司,西安 710077
- 2. 中国科学院金属研究所,沈阳 110016
- 3. 株洲硬质合金集团有限公司,株洲 412000
- 折叠
摘要
Abstract
The carbide-reinforced Co-based alloy was prepared by powder metallurgy technology in this paper. The effects of sintering temperature on the microstructures and mechanical properties of the prepared alloy were investigated by scanning electron microscope (SEM), electron probe microanalyzer (EPMA), and X-ray diffractometer (XRD), and the formation mechanism of reinforced phase was discussed. The results show that, the matrix of carbide-reinforced Co-based alloy prepared by powder metallurgy technology is composed ofγ-Co in face center cubic (FCC) structure andε-Co in hexagonal closed-packed (HCP) structure. The reinforced phases include M6C carbide and M23C6carbide. When the sintering temperature is 1250℃, the blocky M6C carbide and the granular M23C6 carbide are dispersed homogeneously in the matrix. When the sintering temperature increases to 1340℃, the M6C carbide grows into sharp-edge like shape with the average size more than 30μm, meanwhile, the M23C6 carbide is disappeared. When the temperature reaches to 1360℃, the M6C carbide develops into skeleton form, meanwhile, theε-Co phase disappears. The mechanical property test shows that, when the sintering temperature is 1270℃, the prepared Co-based alloy achieves the optimal property with the hardness over 60HRC, the compressive strength of 1921 Mpa, the tensile strength of 203 Mpa, and the friction coefficient of 0.561.关键词
钴基合金/耐磨材料/粉末冶金/微观组织/力学性能Key words
Co-based alloy/wear resistant material/powder metallurgy/microstructure/mechanical property分类
矿业与冶金引用本文复制引用
梁锦奎,侯星宇,崔宇,张洪宇,张卫兵,夏艳萍,孙元,金涛..烧结温度对钴基耐磨合金微观组织和性能的影响[J].粉末冶金技术,2017,35(3):188-194,7.
