| 新型自润滑模具材料的制备和高温性能研究 |
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| 引用本文： | 刘清阳,王华君,周春杨,姚振华,燕松山. 新型自润滑模具材料的制备和高温性能研究[J]. 粉末冶金技术, 2020, 38(1): 51-58. DOI: 10.19591/j.cnki.cn11-1974/tf.2020.01.008 |
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| 作者姓名： | 刘清阳 王华君 周春杨 姚振华 燕松山 |
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| 作者单位： | 1.武汉理工大学材料科学与工程学院, 武汉 430070 |
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| 基金项目： | 武汉理工大学优秀学位论文培育资助项目(2017-YS-006) |
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| 摘 要： | 以铁镍基合金为基体, 添加硬质相Cr2O3及固体润滑剂CaF2, 利用粉末冶金工艺制备了高温自润滑热锻模具材料。采用X射线衍射仪、扫描电子显微镜及显微硬度计, 研究了烧结工艺对铁镍基自润滑材料力学性能的影响, 分析了Cr2O3和CaF2对铁镍基自润滑材料烧结性能的影响, 并得到了最佳烧结工艺。结果表明: 当烧结工艺为1320℃、保温2 h时, 制备得到的铁镍基自润滑材料力学性能优越; 硬质相Cr2O3质量分数从0增加到30%, 试样相对密度下降4.0%, 硬度从HV 227.3增加到HV 342.8;固体润滑剂CaF2质量分数从0增加到10%, 试样相对密度和硬度均下降; 通过600℃摩擦磨损实验发现, 随CaF2质量分数的增加, 试样摩擦系数和磨损率先降低后升高; 当添加质量分数20% Cr2O3和8% CaF2时, 自润滑模具材料的综合性能最佳。
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| 关 键 词： | 粉末冶金工艺 自润滑材料 烧结工艺 摩擦 磨损 |
| 收稿时间： | 2018-11-14 |
Preparation and high temperature properties of new self-lubricating die materials |
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| LIU Qing-yang,WANG Hua-jun,ZHOU Chun-yang,YAO Zhen-hua,YAN Song-shan. Preparation and high temperature properties of new self-lubricating die materials[J]. Powder Metallurgy Technology, 2020, 38(1): 51-58. DOI: 10.19591/j.cnki.cn11-1974/tf.2020.01.008 |
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| Authors: | LIU Qing-yang WANG Hua-jun ZHOU Chun-yang YAO Zhen-hua YAN Song-shan |
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| Affiliation: | 1.School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China2.School of Mechanical and Electrical Engineering, Wuhan University of Technology, Wuhan 430070, China |
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| Abstract: | A new high-temperature self-lubricating die materials was prepared by powder metallurgy using Fe-Ni alloy as the base materials, Cr2O3 as the hard phase, and CaF2 as the solid lubricant. The effects of sintering process on the mechanical properties of Fe-Ni-based self-lubricating materials were investigated by X-ray diffractometer, scanning electron microscope, and microhardness tester, the influences of Cr2O3 and Ca F2 on the sintering properties of the self-lubricating materials were studied, and the optimum sintering process was obtained. The results show that, the self-lubricating materials sintered at 1320 ℃ for 2 h exhibit the excellent mechanical properties. When the content of Cr2O3 by mass increases from 0 to 30%, the relative density of the sample decreases by 4.0%, and the hardness increases from HV 227.3 to HV 342.8. When the content of CaF2 by mass increases from 0 to 10%, the relative density and hardness of the sample gradually decrease. With the increase of CaF2 content by mass in the friction and wear test at 600 ℃, the friction coefficient and wear rate decrease first and then increase. The self-lubricating die materials show the best combination performances as the Cr2O3 content of 20% and the CaF2 content of 8% by mass. |
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| Keywords: | powder metallurgy technology self-lubricating materials sintering process friction wear |
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