福建冶金2026，Vol.55Issue(1)：25-28,4.
退火工艺对双相钢DP980组织与力学性能的影响
Effect of Annealing Process on Microstructure and Mechanical Properties of Dual-Phase Steel DP980
摘要
Abstract
This study systematically investigated the effects of adjusting cold rolling and annealing process parameters(soaking temperature,rapid cooling temperature,and strip speed)on the microstructure and mechanical properties of dual-phase steel DP980.The results show that as the soaking temperature increased from 800 ℃ to 850 ℃,the austenitization process was enhanced,and the accelerated carbon diffusion rate led to an increase in martensite content with a more dispersed distribution,thereby improving the tensile strength to 1100 MPa.However,the elongation decreased to 7.76%due to increased dislocation density.When the rapid cooling temperature rose from 300 ℃ to 450 ℃,the tensile strength decreased from 1100 MPa to 850 MPa,while the elongation increased from 7.8%to 18.89%,accompanied by bainitic transformation at 450℃.Increasing the strip speed shortened the annealing time,suppressed ferrite grain coarsening,optimized the ferrite-to-martensite ratio,and significantly enhanced the comprehensive mechanical properties.This research provides a theoretical basis for formulating industrial mass production process strategies for dual-phase steel DP980.关键词
双相钢/退火工艺/显微组织/力学性能Key words
dual-phase steel/annealing process/microstructure/mechanical properties引用本文复制引用
贾贵兴,刘自权..退火工艺对双相钢DP980组织与力学性能的影响[J].福建冶金,2026,55(1):25-28,4.基金项目
河北省重大科技成果转化专项项目(项目编号18041033Z) （项目编号18041033Z）
