粉末冶金技术2024，Vol.42Issue(3)：234-241,8.DOI:10.19591/j.cnki.cn11-1974/tf.2022030002
铁粉原料类型对Fe-29Ni-17Co可伐合金组织性能影响
Effects of raw iron powder type on the microstructure and properties of Fe-29Ni-17Co Kovar alloys
摘要
Abstract
Fe-29Ni-17Co powder mixes were obtained by mixing nickels and cobalt powders,using the reduced iron powders and carbonyl iron powders as the raw materials,respectively,and the sintered Fe-29Ni-17Co Kovar alloy samples were prepared by pressing and sintering at the different temperatures.The effects of the raw iron powder type and sintering temperature on the microstructure and properties of the sintered body were investigated.The results show that the sintered samples prepared by the carbonyl iron powders have the higher relative density and the better comprehensive performance,the relative density of the sintered body sintered at 1250 ℃ is 97.51％,which is about 1.40％higher than that of the sintered body prepared by the reduced iron powders.The hardness and tensile strength of the samples prepared by the carbonyl iron powders reach HRB 84.6 and 533.8 MPa,respectively,and the thermal conductivity,average thermal expansion coefficient(20～400 ℃),and electrical resistivity are 16.45 W·m-1·K-1,4.71 × 10-6 K-1,and 0.38 Ω·cm,respectively.The distribution of austenite in the sintered body obtained from the carbonyl iron powders is more uniform,the microstructure stability is better after the low temperature treatment,and the degree of martensitic transformation is lower.关键词
可伐合金/粉末冶金/还原铁粉/羰基铁粉/烧结温度Key words
Kovar alloy/powder metallurgy/reduced iron powders/carbonyl iron powders/sintering temperature分类
矿业与冶金引用本文复制引用
张美,陈志鹏,李佳欣,陈闻超,陈鹏起..铁粉原料类型对Fe-29Ni-17Co可伐合金组织性能影响[J].粉末冶金技术,2024,42(3):234-241,8.基金项目
安徽省重点研究与开发项目(202104a05020046) （202104a05020046）
