高致密度Fe-Cr合金的粉末冶金制备工艺研究  

Research on Preparation of Fe-25Cr Alloy with High Density by Powder Metallurgy

作　　者：梁燕[1] 贾磊[2] 张晓峰[2] 

机构地区：[1]西北有色金属研究院,陕西西安710016 [2]西安理工大学材料科学与工程学院,陕西西安710048

出　　处：《铸造技术》2012年第9期1039-1042,共4页Foundry Technology

摘　　要：以单质Fe粉和Cr粉为原料,采用粉末冶金法制备了Fe-25Cr合金。研究了压制压力、烧结温度和烧结时间对合金致密度和显微组织的影响。结果表明,烧结坯体的最终密度在所研究的范围内与压制压力、烧结温度、烧结时间成正比,但当烧结温度为1 300℃,烧结坯体的晶粒明显发生长大。粉末冶金法制备高致密度Fe-25Cr合金的最佳工艺参数为:压制压力800 MPa,烧结温度1 280℃,烧结时间60 min,所得到烧结坯体的相对密度为95.23%,实际密度为7.313 5 g/cm3。Fe-25Cr alloys were prepared by powder metallurgy technology from pure Fe and Cr powders with different processing parameters. The effect of sintering parameters on the microstructure and density of Fe-Cr alloys was investigated. The results show that the density of Fe-Cr alloys is in proportion to press pressure, sintering temperature and sintering time, but when the sintering temperature is as high as 1 300 ℃, the grains of the sintered body grow obviously. The optimal parameters for Fe-25Cr alloys are press pressure 800 MPa, sintering temperature 1 280 ℃ and sintering time 60 min, which result in a relative density of 95.23%, actual density 7.313 5 g/cm3.

关 键 词：粉末冶金 Fe-25Cr合金 工艺参数 致密度 

分 类 号：TF124[冶金工程—粉末冶金]