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大量的有关渗硼的专题文献和渗硼工艺表明,一方面,对这种赋于材料优良耐磨性能的工艺越来越引起人们的重视;另一方面,出现了多种多样的工艺,力图消除渗硼工艺方法的种种不足之处。根据文献[1]～[3],盐浴炉中渗硼工艺的主要缺点是形成FeB和Fe_2B双相渗硼层,以及处理后零件清理困难。从这点来说,以碳化硼为主的粉末混料渗硼工艺比盐浴工艺更为优越。但是,大家都知道,用硼砂及碳化钠盐浴也取得了良好效果。这种工艺使用的盐浴活性较差,但可以获得单相渗硼层。下面介绍我们利用这种盐浴所取得的成果。这种盐浴是《金属技术研究所》设计的,用于处理缝纫机零件,而零件清理可以由以后的热处理予以解决。一、时间、温度因素与渗硼层形成的关系
A large number of the special literature on boronizing and boronizing process show that on the one hand, people pay more and more attention to the process of giving excellent wear resistance to the material; on the other hand, a great variety of processes have been attempted Elimination of boronization process of the various deficiencies. According to the literature [1] ~ [3], the main disadvantage of the boronizing process in the salt bath furnace is the formation of the dual-phase boronizing layer of FeB and Fe_2B and the difficulty of cleaning the parts after the treatment. From this point of view, boron carbide-based powder mixture boronizing process is more superior than the salt bath process. However, as we all know, borax and sodium carbonate bath also achieved good results. The salt bath used in this process is less active, but a single phase boronized layer can be obtained. Here we introduce the results of this salt bath. This salt bath was designed by the Institute of Metal Technology to handle sewing machine parts and part cleaning can be solved by subsequent heat treatment. First, the time, temperature and the formation of boronized layer relationship