压坯粉重对钼环组织和性能的影响  

Influence of compacts powder weight on the microstructure and mechanical properties of molybdenum ring

作　　者：孟涛[1] 杨莉[2] 

机构地区：[1]常熟理工学院机械工程学院,江苏常熟215500 [2]徐州工程学院机电工程学院,江苏徐州221008

出　　处：《电焊机》2015年第6期129-132,共4页Electric Welding Machine

基　　金：江苏省科技厅资助项目(BK20141228)

摘　　要：在对钼粉材料压坯与烧结实验研究的基础上,改变压坯粉重及改进压制、烧结工艺进行实验以获得组织合理、性能优化的钼粉烧结体(钼环试样)。通过OM、SEM及硬度测试等试验,结果表明:当粉重为0.35 g时,因为压坯粉重小而导致压坯致密度较低;当压坯粉重达到0.4 g时,钼环组织细小,具有较低的气孔率和较强的排胶力;随着压坯粉重的增加,其硬度值呈先上升后下降的趋势,在压坯粉重为0.385 g时显微硬度值最高。The microstructure and mechanical property of the molybdenum rings in the different weight is analyzed by the optical microseape （OM）,scanning electron mieroscopy （SEM） and the microhardness tester.The results show that when the weight of the powders is 0.35 g,the low densification is obtained due to the lightweight of the powders,the molybdenum ring with the refined microstructure, lower porosity and better discharge ability is obtained when the weight of the powders is 0.4 g.The hardness is increased firstly and then decreased with the increase of the weight of powders ,when the weight is 0.385 g,the largest value is obtained.

关 键 词：钼环 压坯粉重 组织 力学性能 

分 类 号：TG457.1[金属学及工艺—焊接]