| 李萍,金鑫,高艳红,王君玲,席晓燕,苑少强.双相钢热镀锌前热处理工艺研究[J].唐山学院学报,2024,37(6):14-19,26 |
| 双相钢热镀锌前热处理工艺研究 |
| Research on the Heat Treatment Process of Dual-Phase Steel Before Hot-Dip Galvanizing |
| 投稿时间：2024-03-29 |
| DOI：10.16160/j.cnki.tsxyxb.2024.06.003 |
| 中文关键词: 热处理 微观结构 力学性能 热镀锌 双相钢 加工硬化 |
| 英文关键词: heat treatment microstructure mechanical properties hot-dip galvanizing dual-phase steel work-hardening |
| 基金项目:河北省高等学校科学技术研究项目(ZC2023001);唐山学院博创基金(BC202204) |
| 作者 | 单位 | | 李萍 | 唐山学院 机电工程学院, 河北 唐山 063000
河北省智能装备数字化设计及过程仿真重点实验室, 河北 唐山 063000 | | 金鑫 | 唐山学院 机电工程学院, 河北 唐山 063000
河北省智能装备数字化设计及过程仿真重点实验室, 河北 唐山 063000 | | 高艳红 | 唐山学院 机电工程学院, 河北 唐山 063000 | | 王君玲 | 唐山学院 机电工程学院, 河北 唐山 063000
河北省智能装备数字化设计及过程仿真重点实验室, 河北 唐山 063000 | | 席晓燕 | 唐山学院 机电工程学院, 河北 唐山 063000
河北省智能装备数字化设计及过程仿真重点实验室, 河北 唐山 063000 | | 苑少强 | 唐山学院 机电工程学院, 河北 唐山 063000
河北省智能装备数字化设计及过程仿真重点实验室, 河北 唐山 063000 |
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| 中文摘要: |
| 对DP600钢进行热镀锌前的热处理工艺研究,探讨不同再加热工艺条件下DP600钢的组织和力学性能。通过扫描电子显微镜和透射电子显微镜观察,分析快速冷却温度、再加热过程保温时间对组织演变的影响。拉伸试验表明,不同的微观结构组成表现出不同的力学性能和加工硬化行为,随着快速冷却温度从250 ℃降低到150 ℃,粒状残余奥氏体晶粒的体积分数增加,抗拉强度从658 MPa降低到643 MPa;快速冷却温度为200 ℃时,随着保温时间的增加,屈服强度(YS)、拉伸强度(TS)和屈服强度与拉伸强度的比值(YS/TS)均呈下降趋势。此外,在两阶段的加工硬化行为中,保温时间为10 s的样品与30 s和50 s样品相比,在阶段Ⅰ和阶段Ⅱ皆略高,这归因于未转化奥氏体在较短保温时间内稳定性较低,在随后的冷却过程中已转化为马氏体。 |
| 英文摘要: |
| The heat treatment process of DP600 steel before hot-dip galvanizing was studied, and the microstructure and mechanical properties of DP600 steel under different reheating process conditions were discussed. Through scanning electron microscope and transmission electron microscope observations, the effects of rapid cooling temperature and holding time during the reheating process on microstructure evolution were analyzed. Tensile experiments show that different microstructure compositions exhibit different mechanical properties and work-hardening behaviors. As the rapid cooling temperature decreases from 250 ℃ to 150 ℃, the volume fraction of granular retained austenite grains increases, and the tensile strength decreases from 658 MPa to 643 MPa; When the rapid cooling temperature is 200 ℃, with the increase of holding time, the yield strength (YS), tensile strength (TS) and the ratio of yield strength to tensile strength (YS/TS) all show a downward trend. In addition, in the two stages of work-hardening behavior, the samples with a holding time of 10 s are slightly higher in both stage Ⅰ and stage Ⅱ compared with the samples with holding times of 30 s and 50 s, which is attributed to the lower stability of untransformed austenite within a shorter holding time and its transformation into martensite during the subsequent cooling process. |
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