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“柔性金属贴布”(Powdered Alloy Sheet,简称PAS)涂层技术上近年来国外研究开发的一种在金属表面特别是形状复杂的钢铁工件表面复合涂层的新方法。PAS涂层技术由粉末冶金制粉、有机和无机增塑剂、粘结剂粉末增塑轧制或刮板形成、粉末冶金熔渗烧结、异质材料连接等技术综合而成。主要工艺为:先将所需成分的粉末(包括金属陶瓷:WC、TiC、TiN、TiCN、Cr_3C_2、TAC粘结金属粉末:Fe、Cu、Co、Ni、Ti、Mn等)与有机和无机成形剂、粘结剂、增塑剂制成一面涂有特殊粘附层并象布一样柔软的“金属贴布”,然后冲裁成所需形状并粘贴到金属工件表面,采用适当的方式加热,在金属表面形成具有耐磨、耐蚀、而热或具有其它特殊性能的复合涂层。与传统的常规金属表面改性方法比较,PAS涂层技术有如下特点:(1)涂层厚度可调。根据使用要求,PAS硬贴面
Powdered Alloy Sheet (PAS) Coating Technology In recent years, a new method of composite coatings on the surface of steel, especially the complex shape of steel parts, has been researched and developed abroad. PAS coating technology consists of powder metallurgy, organic and inorganic plasticizers, binder powder plastic rolling or scraper formation, powder metallurgy infiltration sintering, heterogeneous material connection and other technologies. The main process is as follows: First, the powders of the required components (including cermets: WC, TiC, TiN, TiCN, Cr_3C_2, TAC binder metal powders: Fe, Cu, Co, Ni, Ti, Mn and the like) Agents, adhesives, plasticizers made of a special adhesive layer coated with the same cloth as the soft “metal patch”, and then blanked into the desired shape and paste the surface of the metal workpiece, using the appropriate method of heating, In the metal surface with wear-resistant, corrosion-resistant, and heat or have other special properties of the composite coating. Compared with the traditional method of metal surface modification, PAS coating technology has the following characteristics: (1) adjustable coating thickness. According to the requirements of use, PAS hard surfacing