| 引用本文: | 王文权,桑娜,胡春华.表面纳米化对Dievar模具钢高能离子注渗WC层性能的影响[J].中国表面工程,2020,33(2):75~86 |
| Wang Wenquan,Sang Na,Hu Chunhua.Effects of Surface Nano Crystallization on Properties of High Energy Ion Implanted WC Layer on Dievar Die Steel[J].China Surface Engineering,2020,33(2):75~86 |
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| 摘要: |
| 通过超声表面滚压处理制备出具有梯度纳米结构表层的 Dievar 模具钢试样。 在滚压试样和未滚压试样表面进行高能离子注渗 (High energy ion implantation, HEII)工艺优化试验,制备出高能离子注渗碳化钨层,并从微观组织结构、成分、硬度和高温摩擦磨损性能等方面研究表面纳米化对于高能离子注渗碳化钨性能的影响。 结果表明:与 HEII 试样相比,USRP+HEII 试样的梯度纳米结构表层明显增强了高能离子注渗碳化钨的效果。 相对于 HEII 试样,USRP+HEII 试样的表面组织更加致密均匀,其注渗层深度提高了约 27%;USRP+HEII 试样的表面硬度为 944. 9 HV,分别较原始母材硬度和 HEII 试样表面硬度提高了约 373%和 27%;USRP+HEII 试样的平均摩擦因数和体积磨损量在不同温度条件下低于 HEII 试样,说明 USRP+HEII 试样具有更加优良的抗高温磨损性能。 |
| 关键词: Dievar 模具钢 表面纳米化 高能离子注渗 (HEII) 摩擦磨损 |
| DOI：10.11933/j.issn.1007-9289.20191021001 |
| 分类号:TG174.444 |
| 文章编号:1007-9289(2020)02-0075-12 |
| 文献标识码:A |
| 基金项目:吉林省科技厅重点科技研发项目(20180201005GX)； 汽车教育部重点实验室基金 (451170301056) |
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| Effects of Surface Nano Crystallization on Properties of High Energy Ion Implanted WC Layer on Dievar Die Steel |
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Wang Wenquan, Sang Na, Hu Chunhua
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Key Laboratory of Automobile Materials, Ministry of Education, School of Materials Science and Engineering, Jilin University, Changchun 130025 , China
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| Abstract: |
| Surface gradient nanostructural Dievar die steel was prepared by ultrasonic surface rolling processing (USRP). On this nanostructural steel and the as-received die steel, high energy ion implantation (high energy ion implantation, HEII) was conducted to prepare a tungsten carbide layer. The chemical compositions, hardness, and high temperature friction and wear performance were studied to evaluate the effects of surface nano crystallization on the properties of the tungsten carbide layer. Re- sults shows that the gradient nanostructure after the two-step treatment by USRP+HEII process significantly affect the properties of the high energy ion implantation of tungsten carbide, compared with the sample without the treatment by USRP process. Com- pared with the simple HEII processed sample, the surface microstructure of USRP+HEII sample is more uniform and the thick- ness of the diffusion layer increases by about 27%. Specifically, the hardness of the outermost layer of USRP+HEII sample rea- ches 944. 9 HV which is about 373% and 27% higher than the that of the as-received die steel and the simple HEII processed sample. The average friction coefficient and materials loss by wear of USRP +HEII processed samples are smaller than that of HEII processed samples at various temperatures, indicating that USRP+HEII processed samples behave excellent high tempera- ture friction and wear performance. |
| Key words: Dievar die steel surface nano crystallization high energy ion implanting (HEII) friction and wear |
