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采用高能喷丸方法,在ST12钢表面获得一定厚度的纳米晶层。喷丸处理后的样品在温度500℃,保温时间为3 h下进行等离子渗钛处理,可以获得一定厚度的渗钛层。运用光学显微镜,扫描电镜,X射线衍射分析和电化学测试系统等测试技术对纳米晶层、渗钛层的组织结构、显微硬度与耐腐蚀性等进行了研究。结果表明,采用高能喷丸法,在ST12钢表面获得一定厚度的纳米晶层。高能喷丸处理可以显著地降低等离子渗钛的温度。渗钛处理后的ST12钢,其显微硬度和耐腐蚀性能得到了提高。
Using high-energy shot peening method, a certain thickness of nanocrystalline layer is obtained on the surface of ST12 steel. After shot peening treatment, plasma titania treatment was carried out at a temperature of 500 ° C. and a holding time of 3 h to obtain a certain thickness of titanium-impregnated layer. The microstructures, microhardness and corrosion resistance of nanocrystalline and titania layers were investigated by optical microscopy, scanning electron microscopy, X-ray diffraction analysis and electrochemical test system. The results show that the nanocrystalline layer with a certain thickness is obtained on the surface of ST12 steel by high-energy shot peening. High-energy shot peening can significantly reduce the plasma titanium temperature. After the titanium treatment of ST12 steel, its microhardness and corrosion resistance has been improved.