DIFFUSION LAYERS PRODUCED ON IRON AND STEEL SURFACE IN CHROMIUM CHLORIDE ATMOSPHERE AT LOW PRESSURE

Chemical vapor deposition of chromium on the surface of iron and low-carbon steel has been investigated using a novel method that combines the low cost of pack cementation method with advantages of vacuum technique. The processes have been performed in chromium chlorides atmosphere at a low pressure range from 1 to 800 hPa, the treatment temperature 800 to 950oC. The effect of the vacuum level during the process and the process parameters such as time and temperature on the growth kinetics of diffusion layer on steel surface has been investigated. The investigations have proved that the chromizing process under low pressure, with static vacuum instead of dynamic vacuum conditions during the holding is the most effective as far as the growth kinetics of diffusion layers is concerned.

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• Технические науки. Промышленность
• Физико-математические науки
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