Abstract
The effect of austenitizing and tempering temperature on the microstructure and mechanical properties of 65Mn spring steel refined by Tempforming (tempering and deforming of a quenched steel) process was investigated. The martensite substructure of ultrafine grain is composed of high density dislocations and a few twins, but the quantity of twins increases in normal grain martensite steel. Super strength (2220 MPa) and good ductility (8.6%) are achieved at grain size of 5.6 μm when austenitized at 790 °C and tempered at 250 °C. However, contrasted 65Mn steel with normal grain (18.7 μm) displayed almost no any ductility when processed at identical temperature parameters. Accordingly, the tempforming preprocessing contributes to the decrease in grain size and formation of crystallographic texture, which is beneficial for eventual grain refinement after subjected to reheat treatment. By appropriate quenching and tempering treatment after tempforming process, 65Mn spring steel achieved ultrafine grain and super strength and good ductility.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
