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。
所属栏目
试验研究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
2011/5/72011/12/20
作者单位
刘芳:中南大学粉末冶金国家重点实验室, 长沙 410083
周科朝:中南大学粉末冶金国家重点实验室, 长沙 410083
李志友:中南大学粉末冶金国家重点实验室, 长沙 410083
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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