合金化Fe-Mo-Ni-Cu-C烧结硬化钢性能研究
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摘要
以Fe-Mo预合金粉为基粉,通过添加合金元素Ni、Cu,经820℃部分扩散制成Fe-Mo-Ni-Cu部分扩散合金粉,应用粉末冶金技术制备了Fe-Mo-Ni-Cu-C烧结硬化钢,对该材料的组织结构和物理机械性能进行了研究。实验结果表明:烧结硬化钢材料在烧结后期于氢气保护下直接冷却,不需要单独淬火,随冷却速度不同,Fe-Mo-Ni-Cu-C烧结硬化钢的主要金相组织为回火马氏体、珠光体和下贝氏体。合金元素Mo、Ni、Cu的加入改善了材料的组织,大幅度提高了材料的强度和硬度。材料硬度:HRC 50,拉伸强度:σb936 MPa,冲击韧性:23.6 J/cm2,密度:7.23 g/cm3。
The Fe-Mo-Ni-Cu partially diffused alloy powder was produced by partially disffusing Ni and Cu at 820℃into Fe-Mo prealloyed base powder. The Fe-Mo-Ni-Cu-C sinter hardening steel was produced by P / M technology.The physical、mechanic properties、microstructure and fractures of this material were studied. The experimental results show that with different cooling speed the main microstucture of Fe-Mo-Ni-Cu-C sintered steel consist of tempered martensite、perlite and lower bainite. The microstructure of the material is improved,the intensity and the hardness of the material are observably increased by adding Mo、Ni、Cu. Hardness: HRC 50,Tensile-strength: 936 MPa,Impact-toughness: 23. 6J / cm2,Density: 7. 23 g/cm3.
The Fe-Mo-Ni-Cu partially diffused alloy powder was produced by partially disffusing Ni and Cu at 820℃into Fe-Mo prealloyed base powder. The Fe-Mo-Ni-Cu-C sinter hardening steel was produced by P / M technology.The physical、mechanic properties、microstructure and fractures of this material were studied. The experimental results show that with different cooling speed the main microstucture of Fe-Mo-Ni-Cu-C sintered steel consist of tempered martensite、perlite and lower bainite. The microstructure of the material is improved,the intensity and the hardness of the material are observably increased by adding Mo、Ni、Cu. Hardness: HRC 50,Tensile-strength: 936 MPa,Impact-toughness: 23. 6J / cm2,Density: 7. 23 g/cm3.
引文
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[2]郑朝旭,郭瑞金.烧结硬化钢高速高扭矩齿轮的开发,粉末冶金技术,2003,21(6):334-337
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[5]Khraisat W,Nyborg L.Liquid phase sintering of ferrous powder by carbon and phosphorus control,Powder Metallurgy,2003,46(3):265-270
[6]Brian James W,CO'Brien R.High Performance Ferrous PM Materials:The Effect of Alloying Method on Dynamic Properties,Metal Powder Report,1984(4):251-260
[7]崔约贤,王长利.金属断口分析.哈尔滨:哈尔滨工业大学出版社,1998:39-40
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[9]吕海波,杨德统.合金元素Ni、Mo、W及熔渗铜对烧结钢耐磨性的影响,粉末冶金技术,2003,21(4):213-217
[10]Zhang Haorong,German R M.Sintering MIM Fe-Ni alloys,The International Journal of Powder Metallurgy,2002,38(1):51-61.
[2]郑朝旭,郭瑞金.烧结硬化钢高速高扭矩齿轮的开发,粉末冶金技术,2003,21(6):334-337
[3]Guo Ray,Poirier J,Chagnon F.Transfer case sprocket production through the sinter hardening process,Powder Metallurgy Technology,2003,21(6):327-332
[4]Magalhaes SMS,Silvia S M.Surface Composition and Microstructure Control during Forming and Sintering of Ferrous Powder Metallurgy Materials.Gteborg:Chalmers University of Technology,2003
[5]Khraisat W,Nyborg L.Liquid phase sintering of ferrous powder by carbon and phosphorus control,Powder Metallurgy,2003,46(3):265-270
[6]Brian James W,CO'Brien R.High Performance Ferrous PM Materials:The Effect of Alloying Method on Dynamic Properties,Metal Powder Report,1984(4):251-260
[7]崔约贤,王长利.金属断口分析.哈尔滨:哈尔滨工业大学出版社,1998:39-40
[8]Lumpkin E R.Jr.A theoretical review of the copper infiltration of P/M steel,Advances in Powder Metallurgy,1985,17(3):120-123
[9]吕海波,杨德统.合金元素Ni、Mo、W及熔渗铜对烧结钢耐磨性的影响,粉末冶金技术,2003,21(4):213-217
[10]Zhang Haorong,German R M.Sintering MIM Fe-Ni alloys,The International Journal of Powder Metallurgy,2002,38(1):51-61.