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Process of heat-treatment of articles of cast-iron containing nickel and chromium
Process of heat-treatment of articles of cast-iron containing nickel and chromium
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机译:含镍,铬铸铁制品的热处理工艺
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摘要
Articles, particularly wear-proof parts, of cast-iron alloyed with nickel and more than 2% chromium is heat- treated in two phases, in order to improve wear-resistance. In the first place the article is maintained at a temperature of 550 ± 75'C for two to six hours, after reaching that temperature throughout, and in the second place is maintained at a temperature of 775 ± 75°C for two to twelve hours, after reaching that temperature throughout. Thereafter the article is left to cool. As a result of this treatment, the chromium carbides are finely dispersed in the matrix.
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