摘要
与通常采用纯雾化铁粉和部分合金化铁粉作为温压基粉不同,作者对水雾化Fe-Ni-Mo合金钢粉作基粉的Fe-1.5Ni-0.5Mo-1.0Cu-xC(x=0.6,0.8,1.0)粉末进行了温压与烧结行为的研究.结果表明,通过设计新型聚合物润滑剂,高硬度的合金钢粉仍适用于温压工艺.当粉末和模具的加热温度分别为125和145℃时,Fe-1.5Ni-0.5Mo-1.0Cu-0.8C的温压密度较高,在735MPa的压力下进行压制,压坯密度达到7.35g/cm^3,比室温压制提高了0.19g/cm^3左右.并且,温压压坯的弹性后效比室温压制降低了40％,在1120℃烧结1h后的烧结密度为7.32g/cm^3.
Study on warm compacting and sintering behaviour of Powder mixture with nominal compositions ofFe-1. 5Ni-0. 5Mo-1Cu-xC (where x = 0. 6, 0. 8, and 1. 0) made from water-atomized steel powder wascarried out in the present paper. Based upon designing new polymeric lubricants, the results show thatthe water-atomized steel powders with higher microhardness are still suitable to the warm pressing. It isalso found that, as graphite content is 0. 8%, the maximum green density of 7. 35 g/cm^3, which gainsdensity of 0. 19 g/cm^3 and decreases spring back of 40% compared with the ambient compaction, was ob-tained at 735 MPa as the heating temperatures of powder and die were 125 and 145 ℃ respectively. Thesintered density of the compact is 7. 32 g/cm^3 as sintered at 1 120 ℃ for 1 h.
出处
《粉末冶金材料科学与工程》
EI
2001年第2期128-133,共6页
Materials Science and Engineering of Powder Metallurgy
基金
国家"863"计划资助项目(715-012-0060)
