Influence of Annealing and Aging Parameters on the Microstructure and Properties of 1200 MPa Grade Cold-Rolled Dual-Phase Steel.

IF 3.1 3区材料科学 Q3 CHEMISTRY, PHYSICAL

Materials Pub Date : 2024-10-09 DOI:10.3390/ma17194933

Xiaoyue Ma, Xiaohong Chu, Yuebiao Yang, Hongzhou Lu, Wenjun Wang, Zhengzhi Zhao

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引用次数: 0

Abstract

With the rapid development of the automotive industry, the requirements for bodywork materials are not only focused on high strength but also on improved forming properties. To develop a new generation of automotive steels with higher strength-plasticity matching, a high elongation 1200 MPa grade V-Nb microalloyed cold-rolled reinforced formable dual-phase steel was developed in this experiment through rational compositional design and precise process machining. The properties of the test steel are improved by varying the over-aging temperature as well as the annealing temperature to achieve a good strength-plasticity balance. The results show that as the aging temperature increases, the tensile strength and yield strength of the test steel decrease, while the elongation continues to increase. At an aging temperature of 310 °C, the steel exhibits not only high strength but also better ductility. As the annealing temperature increases, the tensile strength and yield strength of the test steel initially increase and then decrease, while the elongation continues to increase. When the heat treatment process involves an annealing temperature of 860 °C and an over-aging temperature of 310 °C, the test steel achieves the best strength-plasticity balance.

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退火和时效参数对 1200 兆帕级双相冷轧钢微观结构和性能的影响

随着汽车工业的快速发展，对车身材料的要求不仅要有高强度，还要有更好的成形性能。为了开发出具有更高强度-塑性匹配的新一代汽车用钢，本实验通过合理的成分设计和精密的工艺加工，开发出了高伸长率 1200 MPa 级 V-Nb 微合金冷轧强化可成形双相钢。通过改变过时效温度和退火温度，改善了试验钢的性能，实现了良好的强度-塑性平衡。结果表明，随着时效温度的升高，试验钢的抗拉强度和屈服强度降低，而伸长率继续增加。在 310 °C 的时效温度下，钢材不仅强度高，而且延展性更好。随着退火温度的升高，试验钢材的抗拉强度和屈服强度先升高后降低，而伸长率则继续升高。当热处理过程的退火温度为 860 ℃、过时效温度为 310 ℃ 时，试验钢的强度和塑性达到最佳平衡。

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来源期刊

Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

5.80

自引率

14.70%

发文量

7753

审稿时长

1.2 months

期刊介绍： Materials (ISSN 1996-1944) is an open access journal of related scientific research and technology development. It publishes reviews, regular research papers (articles) and short communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Materials provides a forum for publishing papers which advance the in-depth understanding of the relationship between the structure, the properties or the functions of all kinds of materials. Chemical syntheses, chemical structures and mechanical, chemical, electronic, magnetic and optical properties and various applications will be considered.