终冷温度对Ti微合金化汽车大梁用钢组织和性能的影响

韩楚菲; 董毅; 时晓光; 孙成钱; 王俊雄; 徐海健

doi:10.7513/j.issn.1004-7638.2024.05.023

终冷温度对Ti微合金化汽车大梁用钢组织和性能的影响

doi: 10.7513/j.issn.1004-7638.2024.05.023

韩楚菲^{1, 2,},
董毅^{1, 2},
时晓光^{1, 2},
孙成钱^{1, 2},
王俊雄^{1, 2},
徐海健^1, ,

1.
海洋装备用金属材料及其应用国家重点实验室, 辽宁鞍山 114009
2.
鞍钢集团钢铁研究院, 辽宁鞍山 114009

详细信息

作者简介:
韩楚菲，1991年出生, 女，硕士研究生，工程师，主要从事先进钢铁结构材料的研究， E-mail：chufeihan2021@163.com

通讯作者:
徐海健，1987年出生, 男，博士研究生，高级工程师，主要从事先进钢铁结构材料的研究；E-mail: haijianxu2013@163.com

中图分类号: TF76, TG156.1
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- 文章访问数: 263
- HTML全文浏览量: 98
- PDF下载量: 15
- 被引次数: 0
出版历程
- 收稿日期: 2023-08-05
- 网络出版日期: 2024-10-30
- 刊出日期: 2024-10-30

Influence of final cooling temperature on the microstructure and mechanical properties of Ti microalloyed automobile beam steel

Han Chufei^{1, 2
,},
Dong Yi^{1, 2},
Shi Xiaoguang^{1, 2},
Sun Chengqian^{1, 2},
Wang Junxiong^{1, 2},
Xu Haijian^{1
, ,}

1.
State Key Laboratory of Metal Materials for Marine Equipment and Applications, Anshan 114009, Liaoning, China
2.
Iron and Steel Research Institute of Angang Group, Anshan 114009, Liaoning, China

摘要

摘要: 对成分为0.11C-1.20Mn-0.055Ti的510L汽车大梁钢进行热轧及层流冷却试验，研究了不同终冷温度(650、610 ℃和570 ℃)对其组织和力学性能的影响。试验结果表明：随着终冷温度的降低，钢的强度显著降低，伸长率增加；组织中等轴状铁素体含量逐渐减少，珠光体含量逐渐增加，晶粒逐渐细化。透射分析结果表明，Ti微合金化的510L汽车大梁钢组织中，析出相为立方结构的TiC相，终冷温度降低导致弥散细小TiC析出相的数量降低，终冷温度对Ti微合金化汽车大梁钢强度的影响是细晶强化和析出强化共同作用的结果。在其它工艺参数不变的情况下，为了保证钢板强韧性指标满足要求，应将钢板的终冷温度保持在650 ℃。
- 汽车大梁钢 /
- 钛微合金化 /
- 析出相 /
- 强度 /
- 组织
Abstract: In order to reveal the influence of final cooling temperature on microstructure and mechanical properties of Ti-microalloyed automobile 510L beam steel, the hot rolling and laminar cooling (LC) experiment was conducted on 0.11C-1.20Mn-0.055Ti beam steel. The experimental results showed that with the final cooling temperature decreasing, the strength of the steels decreased and the elongation increased. Moreover, the ratio of equiaxed ferrite in the steel decreased while the ratio of pearlite increased. And the average grain gradually refined. The TEM observation results showed that the precipitation of dispersed and fine particles was cubic structure TiC particles in the Ti-microalloyed automobile 510L beam steel. The number density of TiC particles decreased with decreasing the final cooling temperature. The effects of final cooling temperature on the strength of the 510L beam steel combine precipitation strengthening and fine grain strengthening.
- automobile beam steel /
- Ti microalloy /
- precipitates /
- strength /
- microstructure

HTML全文

图 1 不同终冷温度下510L汽车大梁钢组织形貌

Figure 1. Microstructure of the automobile 510L beam steel at different coiling temperatures

(a) 650 ℃; (b) 610 ℃; (c) 570 ℃

下载: 全尺寸图片幻灯片

图 2 不同终冷温度下510L汽车大梁钢纳米析出相形貌

Figure 2. Morphologies of precipitates of the automobile 510L beam steel at different cooling temperatures

(a) 650 ℃; (b) 610 ℃; (c) 570 ℃

下载: 全尺寸图片幻灯片

图 3 MnS析出相的TEM分析

(a) 高分辨晶格像; (b) 高分辨的傅里叶变换; (c) FFT过滤的高分辨晶格像

Figure 3. TEM analysis of MnS precipitates

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图 4 TiC析出相的TEM分析

(a) 高分辨晶格像; (b) 高分辨的傅里叶变换; (c) FFT过滤的高分辨晶格像

Figure 4. TEM analysis of TiC precipitates

下载: 全尺寸图片幻灯片

图 5 不同终冷温度下510L汽车大梁钢相图

Figure 5. Phases diagram of automobile 510L beam steel at different cooling temperatures

下载: 全尺寸图片幻灯片

图 6 不同终冷温度下510L汽车大梁钢力学性能

Figure 6. Mechanical properties of the automobile 510L beam steel at different cooling temperatures

(a) 650 ℃; (b) 610 ℃; (c) 570 ℃

下载: 全尺寸图片幻灯片

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