陈华,李月英,刘勇兵,杨友,曹晓杰

• 1:吉林大学汽车材料教育部重点实验室
• 2:吉林大学汽车材料教育部重点实验室
• 3:吉林大学汽车材料教育部重点实验室
• 4:吉林大学汽车材料教育部重点实验室

摘要(Abstract)：

将Cr以铬铁的形式加入到FeNiMoCu系预合金粉末中,经充分混合后单轴600MPa下压制,然后分别采用冷压烧结、烧结热锻和复烧工艺,研究铬对FeNiMoCu系预合金粉末烧结密度、组织及性能的影响。实验结果表明,添加到预合金粉末中的铬在1573K温度烧结时可均匀扩散到组织中,使组织性能得到改善;随添加的铬量和复烧温度的提高,微观组织硬度和表观硬度逐渐增加,经热锻及热锻复烧可获得较高的烧结密度和硬度。当复烧温度为1573K时,Fe-1.5Cr-2.0Ni-0.85Mo-1.7Cu-0.5C获得的密度为7.71 g/cm3,硬度为105HRB;Fe-4.0Cr-3.0Ni-0.85Mo-1.7Cu-0.5C获得的密度为7.63 g/cm3,硬度为105HRB。

关键词(KeyWords)： 预合金粉末;铬铁粉;高密度;热锻烧结;复烧

Abstract:

Keywords:

基金项目(Foundation): 吉林大学“985工程”科技创新平台资助

作者(Author): 陈华,李月英,刘勇兵,杨友,曹晓杰

参考文献(References)：

• [1]Randal I,German M.Manipulation of strength during sintering as a basis for obtaining rapid densification without distortion[J].Materials Transactions,2001,42(7):1400-1410.
• [2]古里维契.粉末钢的热处理[M].高后秀,译,天津:天津大学出版社,1990,11:23-56.
• [3]李绍忠.我国汽车用粉末冶金结构零件的现状与发展[J].粉末冶金技术,1996,24(2):139-144.LI Shao-zhong.Development and status of automotive P/M structure parts[J].Powder Metallurgy Technology 1996,24(2):139-144.
• [4]毛志强.粉末冶金零件在汽车上的应用[J].粉末冶金工业,2003,13(1):8-11.MAO Zhi-qiang.Application of automotive P/M parts[J].Powder Metallurgy Industry,2003,13(1):8-11.
• [5]Lame O,Bellet D,Di Michiel M,et al.Bulk observation of metal powder sintering by X-ray synchrotron microtomography[J].Acta Materialia,2004,52(4):977-984.
• [6]Campos M,Sanchez D,Torralba J M.Sintering behaviour improvement of a low Cr-Mo prealloyed powder stell through Mn additions and others liquid phasepromoters,materials processing technology[J].Journal of Materials Processing Technology,2003,143:464-469.
• [7]Srinivasan N S,Dyanmic.Study of changes in structure and morphology during the heating and sintering of iron powder[J].Powder Technology,2002,124:40-44.
• [8]郭庚辰.液相烧结粉末冶金材料[M].北京:化学工业出版社,2002:34-60.
• [9]MAO Zhi-qiang.Application and development of powder metallurgy materials for automobile parts[J].Powder Metallurgy Industry,2003,13(1):8-11.
• [10]Shimada,Kazuo.Developments of the production engineering in ferrous sintered machine parts[J].Journal of the Japan Society of Powder and PowderMetallurgy,1995,42(10):1093-1098.
• [11]Narasimhan K S.Sintering of powder mixtures and the growth of ferrous powder metallurgy[J].Materials Chemistry and Physics,2001,67:56-65.
• [12]Youn-Che Kim,Shoji Goto.The effect of Cu addition method on dimensional change of Fe-Cu sintered compacts[J].Powder Metallurgy,2005,52:89.

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