| Issue |
E3S Web Conf.
Volume 245, 2021
2021 5th International Conference on Advances in Energy, Environment and Chemical Science (AEECS 2021)
|
|
|---|---|---|
| Article Number | 01003 | |
| Number of page(s) | 5 | |
| Section | Energy Development and Utilization and Energy-Saving Technology Application | |
| DOI | https://doi.org/10.1051/e3sconf/202124501003 | |
| Published online | 24 March 2021 | |
Development of a DP980 steel with low cooling rate requirement
1 Insititute of Intelligent Manufacturing, Jianghan University, 430056, Wuhan, China
2 Baosteel Central Research Institute, 430056, Wuhan, China
* Corresponding author: pan97181@126.com
DP980 is a promising light-weightening material in car body. To avoid high investment of strong cooling system, a new DP980 steel with low cooling rate requirement was developed. The mechanical properties and microstructure were analyzed under different manufacturing process. It could be concluded that the chemical composition design should be reasonable and of low cost to achieve both high strength and also austenite to martensite transformation at low cooling rate. Strength increased with coiling temperature decreasing during hot rolling, and higher annealing temperature and lower over aging temperature were favourable to higher strength. The austenite-martensite transforming could be completed at even lower rapid cooling rate of 20°C/s. Through optimized manufacturing process parameters, the new DP steel product with good mechanical properties could be obtained successfully, which provided a new option for normal production line to produce ultra high strength steel.
© The Authors, published by EDP Sciences, 2021
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