(1. 中南大学 地球科学与信息物理学院，长沙 410083；
2. 中南大学 有色金属成矿预测与地质环境监测教育部重点实验室，长沙 410083)
摘 要: 通过多金属电解法制备FeNiCo预合金粉末，采用X射线衍射仪和扫描电子显微镜对预合金粉末及其烧结体进行形貌观察和物相分析，研究FeNiCo预合金粉不同温度烧结时烧结体的力学性能和磨损性能，并探讨其在金刚石绳锯中应用的可行性。结果表明：制备的FeNiCo预合金粉一定程度上实现合金化，粉末呈不规则状，粒度较细；FeNiCo预合金粉在800~840 ℃烧结时，烧结体硬度最大值为107.6 HRB，三点抗弯强度最大值为1638.3 MPa，致密度最大值为96.2%，磨损质量损失为0.498~0.555 g，烧结温度适应性较好。采用FeNiCo预合金粉为主要胎体成分制作金刚石绳锯锯切硬质石材时，切割效率为8.6 m2/h，工具寿命为11.3 m2/m，具有较好的综合使用性能。
关键字: FeNiCo预合金粉；金刚石绳锯；微观结构；力学性能
（1. School of Geosciences and Info-Physics, Central South University, Changsha 410083, China;
2. Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring, Ministry of Education, Central South University, Changsha 410083, China）
Abstract:The FeNiCo pre-alloyed powder was prepared by polymetallic electrolytic method. The phase composition and morphology of pre-alloyed powder and sintered body were characterized by XRD and SEM. The mechanical properties and wear loss of metal body sintered at different temperatures were tested, and the application of FeNiCo pre-alloyed powder in the diamond wire was researched. The results show that alloying is realized in the FeNiCo pre-alloyed powder to some extent, and the size of the powder is finer with irregular shape. When sintered at 800 ℃ to 840 ℃, the largest hardness of the metal body is 107.6 HRB, the largest bend strength is 1638.3 MPa, the largest relative density is 96.2%, and the wear mass loss is 0.498-0.555 g, thus with a good adaptability of sintering temperature. Using FeNiCo pre-alloyed powder as the main component of the matrix to produce diamond wire saw, it has a good comprehensive performance when cutting hard stone, the cutting efficiency is 8.6 m2/h and the tool life is 11.3 m2/m.
Key words: FeNiCo pre-alloyed powder; diamond wire saw; microstructure; mechanical property
