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钢铁的表面铬合金化常称为钢铁上渗铬,是在高温下使铬与铁相互扩散,在钢铁表面生成一层结合牢固的铬-铁合金,它具有抗窝蚀、抗高温氧化、耐磨耗等性能。可以在相当范围内代替高铬不锈钢,从而节约了铬的用量。钢铁上渗铬的方法很多,大致可以分为粉末包装法、熔盐法、气体法、真空蒸发法及涂渗法等。熔盐法渗铬的研究在近十余年来才有所发展,其优点是操作简单,加热均匀,加热周期短,铬粉不易氧化,且有可能将渗铬和随后的热处理结合进行,减少一道工序。一般的所谓熔盐法是在盐浴(碱金属或碱土金属的氯化物)中加入氯化亚铬作为渗铬剂。Mo-
Chromium alloy steel surface often referred to as steel on the infiltration of chromium, chromium and iron at high temperature is mutual diffusion, the steel surface to generate a layer of solid combination of chromium - iron alloy, which has anti-corrosion, high temperature oxidation, wear Consumption and other performance. Can replace the high-chromium stainless steel within a considerable range, thus saving the amount of chromium. There are many ways of chromium in steel, which can be roughly divided into powder packing method, molten salt method, gas method, vacuum evaporation method and coating method. The research of molten salt chromizing has been developed in the last ten years. The advantages of this method are simple operation, uniform heating, short heating cycle, less oxidation of chromium powder, and the possible combination of chromizing and subsequent heat treatment to reduce A process. The so-called molten salt method is the salt bath (alkali metal or alkaline earth metal chloride) by adding chromium chloride as chromizing agent. Mo-