合金化镀锌双相钢DP980的研制开发
Research and development of galvannealing dual-phase steel DP980
张亮 1黄学启 1刘李斌 2李振 1谢春乾 2史昌 1刘兴全1
作者信息
- 1. 北京首钢股份有限公司,北京 100041
- 2. 首钢集团有限公司技术研究院,北京 100043
- 折叠
摘要
在实验室试验研究的基础上,依托工业连续热镀锌(CGL)生产线成功开发了合金化镀锌双相钢DP980-GA产品.产品基体的微观组织由铁素体、马氏体及很少量的贝氏体组成;镀层相结构由靠近基体的厚度0.6 μm薄层Γ相、主体8相和表层少量ζ相构成,镀层Fe含量适中,控制在10.5％左右.产品的力学性能表现出较低的屈强比(0.624)、良好的伸长率以及较好的扩孔率.量产产品已批量应用于A柱内板等零件,其屈服强度、抗拉强度、伸长率等指标具备良好的过程能力.
Abstract
On the basis of laboratory test and research,galvannealed dual-phase steel DP980-GA was successfully developed relying on industrial continuous galvanizing line(CGL).The results show that microstructure of the steel substrate is composed of ferrite,martensite and a small amount of bainite.The phase structure of the coating is composed of thin Γ layer with 0.6 μm thickness near the substrate,principal phase δ and a small amount of ζ phase,where the Fe content in the coating is around 10.5％.The mechanical properties of the DP980-GA steel product show low yield ratio(0.624),good elongation and hole expansion ratio.The industrial mass produced products were applied to parts such as A pillar inner,of which the process capacity of yield strength,tensile strength and elongation is controlled stably.
关键词
合金化镀锌/DP980双相钢/微观组织/镀层相结构Key words
galvannealing/DP980 dual-phase steel/microstructure/coating phase structure引用本文复制引用
出版年
2024
NETL
NSTL
万方数据