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一、前言在钢铁的化学热处理领域里,渗铬是最早使用的渗金属方法之一。因为碳化铬渗层的硬度高、耐磨性好,且能耐高温和耐各种介质的腐蚀,所以渗铬处理除了大量用于需要抗氧化、抗高温气体腐蚀和抗高温磨损的机件,还被广泛用于提高工模具的耐热、耐磨、耐蚀等方面的性能。例如,经渗铬和铬钛共渗后的锉刀,在锉削HRC40～50的试块时,寿命提高6～8倍。当锉削HRC62的试样时,普通锉刀已没有锉削能力,而渗铬锉刀仍能在较长时
I. Introduction In the field of chemical heat treatment of steel, chromizing is one of the earliest methods of infiltration metal. Because of chromium carbide layer infiltration of high hardness, good wear resistance, and high temperature resistant and resistant to a variety of media corrosion, so in addition to a large number of chromium treatment need antioxidant, high temperature gas corrosion and high temperature wear parts, but also Is widely used to improve tool heat, wear, corrosion and other aspects of performance. For example, the file after chromizing and chromium-titanium co-infiltration, filing HRC40 ~ 50 test block, the life expectancy increased by 6 to 8 times. When filing HRC62 sample, the ordinary file has no filing ability, while the chromizing file can still be longer