Title of article :
Effect of Different Isothermal Time on Microstructure and Mechanical Property of the Low-Carbon Steel Treated by Dual-Stable C-Mn Partitioning Process
Author/Authors :
Xu, Shubo School of Materials Science and Engineering - Shandong Jianzhu University - Jinan 250101, China , Jing, Cainian School of Materials Science and Engineering - Shandong Jianzhu University - Jinan 250101, China , Ding, Xiaoyun School of Materials Science and Engineering - Shandong Jianzhu University - Jinan 250101, China , Ye, Daomin School of Materials Science and Engineering - Shandong Jianzhu University - Jinan 250101, China , Zhao, Jingrui School of Materials Science and Engineering - Shandong Jianzhu University - Jinan 250101, China , Lin, Tao School of Materials Science and Engineering - Shandong Jianzhu University - Jinan 250101, China
Abstract :
The stability of retained austenite was improved by the dual-stable C-Mn partitioning process. The phase transformation andelement diffusion of dual-stable C-Mn partitioning process of tested steel were investigated by means of EPMA, SEM, OM,tensile testing machine, and other analysis methods. The effects of thefirst and second austenite stabilization time on themicrostructure and mechanical properties of low-C-Si-Mn steel were studied, respectively. The enrichment of C and Mnelements is obvious after the dual-stable C-Mn partitioning process, and the microstructure of the tested steel is constituted ofmartensite, ferrite, and retained austenite. Compared with the conventional Q&P steel, the tensile strength of the steel treated bythe dual-stable C-Mn partitioning process is slightly lower, but the plasticity is improved significantly. The tensile strength is875-910 MPa, the elongation is 20-24%, and the product of strength and elongation can reach 21 GPa·%.
Keywords :
Different Isothermal Time , Microstructure , Mechanical Property , Low-Carbon Steel Treated , Dual-Stable C-Mn Partitioning Process , C-Mn
