添加Cu粉对GCr15磨屑粉体性能的影响  

Effect of adding copper powder on the properties of GCr15 powder from grinding chips

作　　者：仲洪海[1] 申文浩[1] 单娜[1] 余亚岚 倪狄 蒋阳[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009

出　　处：《粉末冶金工业》2015年第1期32-37,共6页Powder Metallurgy Industry

基　　金：国家自然科学基金资助项目(61076040);安徽省自然科学基金资助项目(1308085ME71)

摘　　要：分析了GCrl5轴承钢粉体的压制规律,探索了添加Cu对压坯密度、弹性后效、烧结密度和力学性能的影响及压制压力和烧结温度对材料密度、硬度的影响。结果表明:GCr15轴承钢粉体符合黄培云压制方程,在小于1 300MPa的压力下,压坯密度随压力的增大而增加;在低于1 300℃烧结温度下,烧结坯的密度随烧结温度的升高而增加;添加Cu可以提高压坯密度和烧结密度,但对弹性后效影响不大;压制压力为1 200MPa时,不含Cu的GCr15轴承钢磨屑粉压坯密度为6.60g/cm^3,弹性后效为1.73%,H_2气氛中1 150℃烧结2h后密度为6.91g/cm^3;添加5%Cu(质量分数)粉的压坯在H_2气氛中1 300℃烧结2 h后密度达7.23g/cm^3,硬度为36.3 HRC。The compaction law of GCr15 bearing steel powder was analyzed.Influences of Cu addition on the green density,spring-back,sintered density and performance were explored,and the effect of pressure and sintering temperature on the density and hardness was studied.The results show that the compaction law of GCr15 bearing steel powder is accorded with Huang Pei-yun compaction equation.The green density increases with increasing pressure lower than 1300 MPa,and the sintered density increases with increasing sintering temperature lower than1300℃.Addition of copper can improve the green and sintered density,but has little effect on the spring-back.For the GCr15 compacts without copper,the green density of 6.60 g/cm^3 and spring-back of 1.73%are obtained when the pressure is 1200 MPa,and after sintered at 1 150℃ for 2 h in H_2 atmosphere,the sintered density is6.91 g/cm^3.While the compacts of GCr15 bearing steel powders with 5%（mass percent） copper powder sintered at1300℃ for the same time and in the same atmosphere,the density of 7.23 g/cm^3 and the hardness of 36.3 HRC are achieved.

关 键 词：GCR15轴承钢 密度 弹性后效 Cu粉 硬度 

分 类 号：TF122[冶金工程—粉末冶金]