The relaxation properties of carburized steel depend upon the structure of the case. Steel with a high (up to 15%) carbide content in the case has the highest capacity for relaxation. With a decrease in the quantity of carbides in the case, the relaxation capacity of the steel drops. Steel with the minimum (less than 1%) quantity of carbides in the case has the lowest relaxation capacity.
Chrome-nickel steel with an increased content of dispersed residual austenite (up to 45%) in the carburized case possesses high relaxation properties, while steel with an increased quantity (up to 60%) of residual austenite in the form of coarse inclusions and also steel whose structure consists of martensite and an insignificant (up to 10–12%) quantity of residual austenite possess a low capacity for relaxation.
Between the relaxation properties of the steel and its antigalling resistance there exists a correlation. Steel with an increased capacity for relaxation also has high antigalling resistance.
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Kozlovskii, I.S., Manevskii, S.E. Influence of the relaxation properties of the carburized case on the antigalling resistance of constructional steels. Met Sci Heat Treat 25, 759–764 (1983). https://doi.org/10.1007/BF00712253
- High Capacity
- Relaxation Property