引用本文:汪少婷,彭文屹,张林伟,陆磊,陆德平,邓晓华.45钢的脉冲爆炸-等离子体表面改性[J].中国表面工程,2018,31(4):88~95
WANG Shao-ting,PENG Wen-yi,ZHANG Lin-wei,LU Lei,LU De-ping,DENG Xiao-hua.Surface Modification of 45 Steel by Pulse Detonation-plasma Technology[J].China Surface Engineering,2018,31(4):88~95
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45钢的脉冲爆炸-等离子体表面改性
汪少婷1, 彭文屹1, 张林伟2, 陆磊2, 陆德平2, 邓晓华3
1.南昌大学 材料科学与工程学院, 南昌 330031;2.江西省科学院 应用物理研究所, 南昌 330029;3.南昌大学 空间科学技术研究院, 南昌 330031
摘要:
采用脉冲爆炸-等离子体（PDP）技术对45钢进行表面改性处理，用OM、SEM、XRD分析了PDP处理前后试样的截面形貌和相结构变化，利用显微维氏硬度计、磨损测试和电化学方法研究了PDP处理前后显微硬度、耐磨性能和耐腐蚀性能。结果表明：由于PDP过程中含有空气成分，并在处理时快速加热与冷却试样，使改性层有残余奥氏体出现，并生成新相Fe3N，形成了一层厚约52.10 μm的含有柱状晶与细晶区双层结构的改性层。PDP处理使45钢表层在一定深度范围内显微硬度提高约2.9倍，耐磨损性能也得到了有效的改善，磨损质量损失仅为基体的1/3，磨痕宽度也明显减小。
关键词:  脉冲爆炸-等离子体  45钢  表面改性
DOI：10.11933/j.issn.1007-9289.20180123002
分类号:TG668
基金项目:国家自然科学基金（51461030,51501085）
Surface Modification of 45 Steel by Pulse Detonation-plasma Technology
WANG Shao-ting1, PENG Wen-yi1, ZHANG Lin-wei2, LU Lei2, LU De-ping2, DENG Xiao-hua3
1.School of Materials Science and Engineering, Nanchang University, Nanchang 330031;2.Institute of Applied Physics, Jiangxi Academy of Science, Nanchang 330029;3.Institute of Space Science and Technology, Nanchang University, Nanchang 330031
Abstract:
45 steel were treated by pulse detonation-plasma (PDP) technology. The cross section morphology and phase structure of 45 steel before and after treatment were analyzed by OM, SEM and XRD. The microhardness, wear resistance and corrosion resistance before and after treatment were investigated by microhardness tester, wear test and electrochemical method, respectively. The results show that both Fe3N phase, retained austensite and γ-Fe phase appear in the double-structure modified layer with the thickness of about 52.10 μm, including column-like zone and fine microstructure zone, for the detonation plasma including air and the specimen heated and cooled rapidly during the PDP process. The PDP technology can improve the microhardness nearly tripling that of the substrate in a certain depth, and the wear resistance is also improved effectively. The wear loss is only one third of that of the substrate and the width of grinding is also significantly reduced. However, the corrosion resistance after treatment is weakened as well.
Key words:  pulse detonation-plasma (PDP)  45 steel  surface modification
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