| 引用本文: | 张明铭,陈乐平,陆磊,余玖明,付青峰.脉冲爆炸-等离子体技术处理对W18Cr4V高速钢组织及性能的影响[J].中国表面工程,2023,36(1):200~207 |
| ZHANG Mingming,CHEN Leping,LU Lei,YU Jiuming,FU Qingfeng.Effect of Pulse Detonation-plasma Technology Treatment on Microstructure and Properties of W18Cr4V High-speed Steel[J].China Surface Engineering,2023,36(1):200~207 |
|
| 摘要: |
| 脉冲爆炸-等离子体技术(PDT)是一种在大气环境下进行的表面改性技术。目前对 PDT 的研究主要集中在使用 W 电极改性，对其他电极改性效果研究不足。为探究电极材料为 Ta 时，在不同电容下 PDT 技术对的 W18Cr4V 高速钢改性效果和机理，使用 Ta 电极对 W18Cr4V 高速钢分别在 800 μF 与 1 040 μF 电容下进行 PDT 处理，对处理后的物相、组织与性能进行了研究。采用 X 射线衍射仪和场发射扫描电子显微镜对材料表面物相与截面组织形貌进行观察。发现经 PDT 处理后试样表面形成一层改性层，不同电容条件下，改性层厚度不同，在改性层表面形成 Fe4N、Ta5N6、Ta2O5等新相，改性层组织为超细晶马氏体、残余奥氏体与网状铁钨碳化物组织，Ta 元素渗入到改性层一定厚度中。经过 HX-1000SPTA 型显微维氏硬度计和 HT-1000 高温摩擦磨损试验机对试样硬度和耐磨性能进行测试，发现硬度最高提升 1.7 倍，耐磨性能最高提升 2.6 倍。使用 Ta 电极对 W18Cr4V 进行 PDT 处理后，W18Cr4V 性能得到大幅度提升。在不同电容下使用 Ta 电极对 W18Cr4V 高速钢进行 PDT 改性的效果与机理推进了对 PDT 的研究。 |
| 关键词: 脉冲爆炸-等离子体技术(PDT) W18Cr4V 高速钢 表层组织 硬度 耐磨性能 |
| DOI：10.11933/j.issn.1007?9289.20220329001 |
| 分类号:TG142 |
| 基金项目:国家自然科学基金(51961015)和江西省重大科技研发专项(20194ABC28011)资助项目 |
|
| Effect of Pulse Detonation-plasma Technology Treatment on Microstructure and Properties of W18Cr4V High-speed Steel |
|
ZHANG Mingming1, CHEN Leping1, LU Lei2, YU Jiuming2, FU Qingfeng2
|
|
1.School of Aeronautical Manufacturing Engineering, Nanchang Hangkong University,Nanchang 330063 , China;2.Institute of Applied Physics, Jiangxi Academy of Sciences, Nanchang 330096 , China
|
| Abstract: |
| Pulse detonation-plasma technology (PDT) is a surface modification technology for atmospheric environments introduced by the Patton Welding Institute in Ukraine to improve the hardness and wear resistance of materials. At present, research on PDT mainly focuses on the modification of materials using W electrodes. Research on the modification effects of other electrodes is insufficient. The effects of PDT treatment on W18Cr4V high-speed steel using Ta as the electrode material were investigated under the capacitance of 800 μF and 1040 μF, respectively. The phase, microstructure, and properties of the treated steel were studied. Scanning electron microscopy was used to observe the surface of the treated sample. It was found that the scratches on the treated sample surface disappeared. When the treatment capacitance was 800 μF, sputtering molten droplets were generated on the sample surface. When the treatment capacitance was 1040 μF, patches of molten pools were generated on the sample surface along with small cracks. A large amount of Ta (over 50 wt.%) was found on the surface of the treated sample. X-ray diffraction and field-emission scanning electron microscopy were used to observe the surface phase and section morphology of the material. A modified layer formed on the sample surface after PDT treatment. Under different capacitance conditions, the thickness of the modified layer varied; and new phases, such as Fe4N, Ta5N6, and Ta2O5, formed on the surface of the modified layer. The substrate structure is a ferrite and iron-tungsten carbide phase. The modified layer is a superfine martensite, residual austenite, and reticular iron-tungsten carbide structure. The Ta element penetrated a certain thickness of the modified layer. The hardness and wear resistance of the samples were tested using the HX-1000SPTA micro Vickers hardness tester and HT-1000 high-temperature friction and wear testing machine. The results showed that the hardness increased by 1.7 times to reach 823.3 HV, while the wear resistance increased by 2.6 times. Thus, the PDT treatment of W18Cr4V steel with the Ta electrode significantly improved its performance. The improved hardness and wear resistance were attributed to the following. The appearance of the iron nitride, tantalum nitride, tantalum oxide, and other hard phases on the surface of the material significantly improved its hardness and wear resistance. After the PDT treatment, a modified layer containing superfine martensite, residual austenite, and an alloy carbide structure was formed. The martensite structure had high hardness and wear resistance, indicating that that the hardness and wear resistance of the sample greatly improved. The Ta element also penetrated and combined with the surface of the material for alloying, which improved the hardness and wear resistance of the material. |
| Key words: pulse detonation-plasma technology(PDT) W18Cr4V high-speed steel surface microstructure hardness wear resistance |
