Reheat treatment: effects in supermartensitic stainless stell
International Journal of Development Research
Reheat treatment: effects in supermartensitic stainless stell
Received 14th June 2020; Received in revised form 28th July 2020; Accepted 11th August 2020; Published online 30th September 2020
Copyright © 2020, Gabriel Maschio et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Heat re-treatment of metals to obtain a specific hardness is a common industrial practice. Hardness, sometimes, is the only parameter on quality control to approve the heat treatment efficacy. This investigation analyses a sequence from one to seven heat re-treatment, and its influence on the microstructure and mechanical properties of the 13Cr supermartensitic stainless steel. Metallographic analysis, tensile and Charpy impact tests were conducted in specimens reprocessed seven times by quenching and tempering. Microstructure examinations showed the grain refinement and nonlinear variation of the volume fraction of retained austenite. Mechanical resistance was improved until the fifth re-treatment. The best relation between all properties was available in the fourth cycle.
