退火工艺对双相钢DP980组织与力学性能的影响OA
Effect of Annealing Process on Microstructure and Mechanical Properties of Dual-Phase Steel DP980
本文通过调整冷轧退火工艺参数(均热温度、快冷温度、带速),系统研究其对双相钢DP980 显微组织与力学性能的影响规律.结果表明,随着均热温度从 800℃升至 850℃,促进了奥氏体化进程,碳扩散速率加快,导致马氏体含量增加且分布弥散,抗拉强度提升至1100 MPa,但延伸率因位错密度升高而降至7.76%;快冷温度由300℃升至 450℃时,抗拉强度从 1100 MPa降至 850 MPa,延伸率由 7.8%增至 18.89%,且 450℃时发生贝氏体相变;提高带速可缩短退火时间,抑制铁素体晶粒粗化,优化铁素体与马氏体比例,综合力学性能显著改善.本研究为双相钢DP980工业大生产的工艺方案制定提供了理论依据.
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.
贾贵兴;刘自权
河钢集团,河北 石家庄 050023河钢集团邯钢公司技术中心,河北 邯郸 056015
双相钢退火工艺显微组织力学性能
dual-phase steelannealing processmicrostructuremechanical properties
《福建冶金》 2026 (1)
25-28,4
河北省重大科技成果转化专项项目(项目编号18041033Z)
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