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| 烧结温度对粉末冶金铁基材料组织与性能的影响 |
| Effect of Sintering Temperature on Microstructure and Properties of Powder Metallrgy Iron-Based Materials |
| Received:July 10, 2020 |
| DOI：10.3969/j.issn.1674-6457.2021.02.006 |
| 中文关键词: 粉末冶金 铁基材料 烧结温度 显微组织 |
| 英文关键词: powder metallurgy iron-based materials sintering temperature microstructure |
| 基金项目:企业委托项目(19H0218) |
| Author Name | Affiliation | | LI Xiang-rong | School of Mechanical Engineering, Sichuan University, Chengdu 610044, China | | XU Ying | School of Mechanical Engineering, Sichuan University, Chengdu 610044, China | | SONG Xiang-yu | School of Mechanical Engineering, Sichuan University, Chengdu 610044, China
Zhejiang Zhenxing Petrochemical Machinery Co., Ltd., Wenzhou 325200, China | | XIONG Ji | School of Mechanical Engineering, Sichuan University, Chengdu 610044, China | | HUANG Yuan-qing | Yangjiang Shibazi Knife and Shearing Products Co., Ltd., Yangjiang 529931, China |
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| 中文摘要: |
| 目的 利用粉末冶金工艺制备了Fe-Ni-Cu-Cr-Si-C(石墨)材料，并且研究烧结温度对材料显微组织、硬度、致密度、耐磨性的影响。方法 在1050，1100，1150 ℃烧结温度下烧结2 h后得到了3组样品，并利用光学显微镜、扫描电子显微镜、X射线衍射仪对样品进行组织结构分析。采用布氏硬度计和电子天平分别对样品进行硬度和密度测试，采用球盘磨损实验机对样品进行耐磨性分析。结果 随着烧结温度的升高，晶粒尺寸逐渐变大。当烧结温度从1050 ℃增大到1100 ℃时，奥氏体量增加，表明奥氏体的转变在进行，且硬度和致密度也逐渐增加。烧结温度从1100 ℃增大到1150 ℃时，硬度的增速放缓，且在1150 ℃时硬度达到最大值，烧结温度在1150 ℃时耐磨损性能最好。随着烧结温度的升高，摩擦因数逐渐减小，由于材料的硬度增大，基体更有能力支撑表面润滑膜，从而表现出更加优越的耐磨损性能。结论 在1050~1150 ℃范围内，烧结温度的提高可以改善显微组织，提高组织的硬度、致密性、耐磨性。 |
| 英文摘要: |
| The work aims to prepare Fe-Ni-Cu-Cr-Si-graphite alloy by powder metallurgy and study the effect of sintering temperature on microstructure, hardness, density and wear resistance of material. Three groups of samples were obtained after sintering at 1050, 1100 and 1150 ℃ for 2 h. The microstructure of the samples was analyzed by optical microscope, scanning electron microscope and X-ray diffractometer. The hardness and density of the samples were measured by Brinell hardness tester and electronic balance respectively, and the wear resistance of the samples was analyzed by ball-on-disk wear tester. The results showed that the grain size increased with the increase of sintering temperature. The austenite mass increased when the sintering temperature increased from 1050 ℃ to 1100 ℃, indicating that austenite transformation was still going on. Hardness and density also increased, but the increase rate of hardness slowed down when the sintering temperature increased from 1100 ℃ to 1150 ℃. Abrasion resistance was the best in the sintering temperature of 1150 ℃. With the increase of sintering temperature, the friction coefficient gradually decreased. The increase of the hardness of the material enhanced the bonding ability between the matrix and the surface lubrication film. Thus, it showed the better wear resistance. In the range of 1050 ℃ to 1150 ℃, the increased sintering temperature will improve the microstructure and improve the hardness, density and wear resistance of the microstructure. |
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