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Research of Producing Reduction Steel Powder from GCr15 Steel Scrap
Abstract:
In order to use GCr15 steel scrap from Wuxi, production process of reduction steel powder was studied according to its characteristic, including the effect of magnetic separation process on removing impurity, the selection of reduction process parameters. The results showed that bake in air at 500°C should be conducted to burn lubricant off. Magnetic separation on removing impurity should be conducted after burning lubricant off, and ball-milling in water should be added before wet magnetic separation. Effect of magnetic separation and recovery rate of steel scrap were comprehensive best when magnetic induction was selected at 80mT. Reduction system should be adopted at 850°C, 5 h in reducing atmosphere of dissociated ammonia.-100 mesh particle size and 20mm in material thickness should be selected. Through the above process, performance of GCr15 reduction steel powder produced by steel scrap from polishing process was as follows, TFe content was 97.18%, acid insoluble content was 0.38%, and it can be used to produce powder metallurgy structural parts. Performance of GCr15 reduction steel powder produced by steel scrap from grinding process was as follows, TFe content was 95.14%, acid insoluble content was 2.49%, and it can be used as steel powder for welding electrode.
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Pages:
182-186
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Online since:
June 2014
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