Affiliation:
1. The State Key Laboratory of Refractories and Metallurgy Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and Technology 947 Heping Avenue Wuhan 430081 China
2. University of Science and Technology Beijing Beijing 100083 China
3. Wuhan Iron and Steel Company Limited Wuhan 430080 China
Abstract
The effects of coiling temperature on microstructure and properties of a Ti–Nb microalloyed high‐speed guardrail steel are investigated. The results show that when the coiling temperature varied from 570 to 670 °C, the optimum comprehensive mechanical properties are obtained at the coiling temperature of 620 °C. The yield strength, tensile strength, and total elongation are 729, 813 MPa, and 11.8%, respectively. The difference in yield strength between the samples at varying coiling temperature is attributed to different strengthening effects of grain refinement, precipitation, and dislocation strengthening, among them the grain refinement and precipitation strengthening contributions are dominating, with contributions of 290 and 186 MPa, respectively, at 620 °C. Moreover, the fine nano‐scale (Ti, Nb)C particles are formed during and after the coiling stage.
Funder
National Nature Science Foundation of China
Subject
Materials Chemistry,Metals and Alloys,Physical and Theoretical Chemistry,Condensed Matter Physics
Cited by
6 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献