316L不锈钢粉末温压与模壁润滑的高密度成形  

High density compaction of stainless steel 316L powders through warm compaction and die wall lubrication

作　　者：果世驹[1] 杨霞[1] 陈邦峰[1] 胡学晟[1] 魏延萍[1] 

机构地区：[1]北京科技大学粉末冶金研究所,北京100083

出　　处：《粉末冶金技术》2005年第6期403-408,共6页Powder Metallurgy Technology

基　　金：国家"863"计划资助项目(2001AA337010)

摘　　要：通常在室温下,用内润滑方式难以将316L不锈钢粉末压制成高密度生坯。本工作研究了316L不锈钢粉末的温压、模壁润滑和同时使用温压与模壁润滑的压制过程。研究发现:(1)模壁润滑和温压的同时使用可大幅度提高316L粉末的模压生坯密度。(2)复合润滑剂比单质EBS蜡更适用于有模壁润滑的温压过程,在工业常用的压制压力下,粒度<74μm的316L粉末的生坯密度超过7.4g/cm3。(3)316L粉末的高密度成形使得粉末颗粒强烈塑性变形,出现了晶粒内的亚晶结构。(4)同时使用模壁润滑和温压得到的高密度生坯在烧结过程不会发生体积膨胀,烧结密度超过7.56 g/cm3。It is difficult to achieve high green density for compacting stainless steel 316L powders at room temperature by inner lubrication. In the present paper, high density compaction of stainless steel 316L powders through warm compaction and die wall lubrication has been investigated. The experimental results show that （ 1 ） combination of die wall lubrication and warm compaction results in rather higher green densities of 316L powders; （2） mixture of lubricants is more efficiency than single compound such as EBS wax, the green density higher than 7.4g/cm^3 for 316L powders of particle size 〈 74μm can be obtained with normal compaction pressure; （3）there is a large amount of sub-grains in powder particle , which formed by intensively plastic deformation during warm compaction; and （4） higher green density does not result in volume swell during sintering and sintered density of above 7.56 g/cm^3 can be achieved.

关 键 词：粉末冶金 生坯 温压 模壁润滑 

分 类 号：TF123.2[冶金工程—粉末冶金] TQ314.258[冶金工程—冶金物理化学]