新型碳化物颗粒增强铁基粉末冶金材料的组织与性能
Microstructure and Properties of A New-Typed Carbide Particles Reinforced Fe-Based Powder Metallurgy Material
摘 要
制备了一种新型的碳化物颗粒增强铁基粉末冶金材料, 采用光学显微镜、扫描电镜、能谱分析仪和力学性能试验机等研究了烧结温度和退火温度对其组织与性能的影响。结果表明: 随着烧结温度升高, 碳化物形貌从块状向针状转变; 1 270 ℃烧结时的相对密度和硬度最高, 1 240 ℃烧结时的抗弯强度和冲击韧度最高; 脆性针状碳化物在晶界上以半连续网状析出, 降低了材料的性能; 1 200 ℃退火后, 晶界上的针状碳化物分解并球化, 其相对密度、硬度、抗弯强度和冲击韧度分别达到96.2%, 44.5 HRC, 628 MPa, 3.8 J·cm-2。
碳化物
颗粒强化
烧结
退火
组织
性能
powder metallurgy
carbide
particle reinforce
sinter
anneal
microstructure
property
Abstract
A new carbide particles reinforced Fe-based powder metallurgy material was prepared. The effect of the sintering temperature and annealing temperature on the microstructure and properties of the material was studied by optical microscopy, scanning electron microscopy, energy dispersive spectroscopy and mechanical property testing. The results show that the morphology of carbides changed from bulk to needle-like with the increase of the sintering temperature. The relative density and hardness of the material sintered at 1 270 ℃ and the bending strength and impact toughness of the material sintered at 1 240 ℃ were maximal, respectively. The brittle needle-like carbides precipitated in semi-continuous network form along grain boundaries and thus decreased the property of the material. After annealing at 1 200 ℃, the needle-like carbides decomposed and spherified, and the relative density, hardness, bending strength and impact toughness of the material were 96.2%, 44.5 HRC, 628 MPa, 3.8 J·cm-2, respectively.
中图分类号 TF125.9
所属栏目 试验研究
基金项目 国家自然科学创新团队基金资助项目(50721003); 湖南省自然科学基金资助项目(11JJ3044)
收稿日期 2011/5/7
修改稿日期 2011/12/20
网络出版日期
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备注刘芳(1973-), 女, 湖南涟源人, 助理研究员, 博士。
引用该论文: LIU Fang,ZHOU Ke-chao,LI Zhi-you. Microstructure and Properties of A New-Typed Carbide Particles Reinforced Fe-Based Powder Metallurgy Material[J]. Materials for mechancial engineering, 2012, 36(5): 18～21
刘芳,周科朝,李志友. 新型碳化物颗粒增强铁基粉末冶金材料的组织与性能[J]. 机械工程材料, 2012, 36(5): 18～21
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参考文献
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【13】吴晓莉, 杨德统.熔渗铜对高合金烧结钢组织的影响[J]..
【2】FISCHER A.Well-founded selection of materials for improved wear resistance[J].Wear, 1996, 194: 238-245.
【3】MATSUBARA Y, SASAGURI N, SHIMIZU K.et al.Solidification and abrasion wear of white cast irons alloyed with 20% carbide forming elements[J].Wear, 2001, 250: 502-510.
【4】HAUERT A, ROSSOLL A, MORTENSEN A.Ductile-to-brittle transition in tensile failure of particle-reinforced metals[J].Journal of the Mechanics and Physics of Solids, 2009, 57(3): 473-499.
【5】张仲和, 王爱华, 李念卒.铁基粉末冶金结构零件的开发[J].粉末冶金工业, 1998, 8(1): 31-34 .
【6】ERGUN E, ASLANTAS K, TASGETIREN S.Effect of crack position on stress intensity factor in particle-reinforced metal-matrix composites[J].Mechanics Research Communications, 2008, 35(4): 209-218.
【7】BABAKHANI A, HAERIAN A, GHAMBRI M.Effect of heat treatment, lubricant and sintering temperature on dry sliding wear behavior of medium alloyed chromium PM steels[J].Journal of Materials Processing Technology, 2008, 204: 192-198.
【8】WRIGHT C S, WRONSKI A S, ITURRIZA I.Development of robust processing routes for powder metallurgy high speed steel[J].Material Science and Technology, 2000, 16(9): 945-957.
【9】MEI Z, YAN Y W, CUI K, et al.Effect of matrix composition on the microstructure of in situ synthesized TiC particulate reinforced iron-based composites[J].Materials Letter, 2003, 57(21): 3175-3181.
【10】ZHANG P, LI F G.Effect of particle characteristics on deformation of particle reinforced metal matrix composites[J].Transactions of Nonferrous Metals Society of China, 2010, 20(4): 655-661.
【11】刘芳, 周科朝, 李志友.高合金铁基粉末冶金材料摩擦磨损性能的研究[J].材料科学与工艺, 2011, 9(2): 92-95.
【12】MENAPACE C, MOLINARI A, BORTOLOTTI F, et al.Effect of copper infiltration on Fe-based PM parts[C]// Proceedings of the 3rd International Powder Metallurgy Conference.Ankara: Turkey Sponsor, 2002.
【13】吴晓莉, 杨德统.熔渗铜对高合金烧结钢组织的影响[J]..
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