Effect of heat treatment on the structure and properties of sintered steels produced by dynamic hot pressing
After quenching and tempering, sintered steels possess mechanical properties superior to those of cast and forged steels of the same carbon content. This is evidence that quenching preserves the hardening induced by the thermomechanical effect of DHP.
Cementite in high-carbon sintered steels produced by DHP exhibits increased stability. Its propensity for graphitization and coagulation grows as a result of quenching and tempering at 600°C. This phenomenon ensures that hypereutectoid steels subjected to quenching and tempering possess good ductility.
Performing DHP so as to obtain a HTMT effect makes it possible to produce high-strength sintered articles and dispense with additional heat treatment (quenching).
KeywordsMechanical Property Heat Treatment Ductility Carbon Content Cementite
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