Fe基预合金粉的结构及低温烧结性能研究  

Research on Structure and Low-temperature Sintering Properties of Fe Based Prealloyed Powders

作　　者：谢德龙[1] 万隆[1] 宁春旭[2,3,4] 林峰[2,3,4] 方啸虎[2,3,4] 秦海青[2,3,4] 潘晓毅[2,3,4] 

机构地区：[1]湖南大学材料科学与工程学院,长沙410082 [2]中国有色桂林矿产地质研究院有限公司,桂林541004 [3]国家特种矿物材料工程技术研究中心,桂林541004 [4]广西超硬材料重点实验室,桂林541004

出　　处：《人工晶体学报》2015年第1期1-6,共6页Journal of Synthetic Crystals

基　　金：广西科学基金资助项目(桂科基0342004-3);科技部科研院所技术开发研究专项(2013EG115007);广西自然科学基金(2013GXNSFAA019320);广西科学研究与技术开发计划项目(桂科攻1348008-3);中色集团科技开发项目(2013KJJH11);桂林科学研究与技术开发计划项目(20140104-4)

摘　　要：采用共沉淀法制备了Fe基预合金粉,并进行了不同温度下的烧结实验,对烧结后的试样块进行了力学性能测试及结构表征。结果表明,在共沉淀过程中该预合金粉已经形成了固溶体,实现了合金化,粉末的微观结构更有利于烧结的进行。预合金粉的烧结温度不宜超过900℃,最佳烧结温度为850℃,在此温度下试样具有较好的综合力学性能。烧结体的SEM观察表明在850℃烧结温度下材料的微观结构比较均匀,无明显晶粒长大,胎体材料对金刚石的包镶能力也最好。Fe based prealloyed powders were manufactured by co-precipitation method. The mechanical properties of samples sintered at different temperatures were tested. Alloy ＇s structure formed during coprecipitation process was studied by XRD and the morphology was observed by SEM. The results show that the sintering temperature should be less than 900 ℃ and the mechanical properties of the alloys are the best when sintered at 850 ℃. The samples sintered at 850 ℃ have the uniform grain size and best mechanical retention of matrix applied to diamond.

关 键 词：预合金粉 金刚石 烧结 共沉淀 力学性能 

分 类 号：TG454[金属学及工艺—焊接]