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研究了钢在800℃中温盐浴硼-稀土-铝多元渗工艺及随后的热处理,并分析了渗剂成分、扩渗时间、渗后热处理对渗层的组织、结构和性能的影响。试验表明:钢经中温盐浴扩渗后可在表面形成渗层;在盐浴中加入一定量的铝、稀土可显著增加渗层厚度、改善渗层组织,并可将多元渗与普通热处理直接复合强化;热处理后渗层组织致密、结合牢固,具有良好的耐磨、耐蚀、抗氧化等性能。本试验的工艺特点是:渗剂来源广、成本低、处理温度低、变形小、简便易行、渗后热处理简化、节能省工。
The boron-rare earth-aluminum multiple infiltration process and subsequent heat treatment of steel at 800 ℃ were studied. The effects of infiltrant composition, infiltration time and post-infiltration heat treatment on microstructure, structure and properties of the infiltrated layer were analyzed. The experimental results show that the steel can be infiltrated on the surface after being infiltrated by the medium temperature salt bath. Adding a certain amount of aluminum and rare earth into the salt bath can significantly increase the thickness of the infiltrated layer and improve the structure of the infiltrated layer, and can directly penetrate the multiple infiltration and ordinary heat treatment Compound strengthening; after heat treatment, the osmotic tissue is dense and firm, with good wear resistance, corrosion resistance and oxidation resistance. The process of this experiment is characterized by: a wide range of sources of penetration agent, low cost, low processing temperature, small deformation, simple, post-seepage heat treatment simplification, energy saving.