Processes occurring during the tempering of wear-resistant cast irons

Conclusions

• 1. Carbon exerts a greater influence than manganese on the temper resistance of cast irons with 30% Cr.

• 2. The critical tempering temperature of wear-resistant cast irons depends on the carbon content and is independent of the manganese content.

• 3. According to diagrams that we have constructued, it is possible to determine the hardness of cast iron as a function of its carbon and manganese content and the tempering temperature; this makes it possible to assign heat-treatment regimes on a rational basis.