30CrMo精冲钢连铸板坯高温力学性能研究

特殊钢 ›› 2021, Vol. 42 ›› Issue (5): 65-68.

30CrMo精冲钢连铸板坯高温力学性能研究

段卫平¹，袁航²，李京社²，杨树峰²

1. 天津铁厂有限公司，邯郸 056400 ；
2. 北京科技大学冶金与生态工程学院，北京 100083

收稿日期:2021-06-28 出版日期:2021-10-01 发布日期:2023-02-03
作者简介:段卫平(1967-)，男，硕士(2006年北京科技大学)，工程师，连铸坯质量控制研究。

Study on High Temperature Mechanical Properties of Fine Blanking 30CrMo Steel Continuous Casting Slab

Duan Weiping¹ , Yuan Hang², Lin Jingshe², Yang Shufeng²

1. Tianjin Iron Works Co.,Ltd., Handan 056400 ；
2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083

Received:2021-06-28 Published:2021-10-01 Online:2023-02-03

摘要/Abstract

摘要： 利用Gleeble-3800 热模拟机测试了30CrMo精冲钢连铸坯从1350 °C以5°C/s和15°C/s冷却至600~900°C拉伸的高温力学性能，通过扫描电镜对拉伸试样的断口形貌和显微组织进行了观察分析，讨论了各温度区域变形断裂的机理。结果表明，冷却速度增大，铸坯整体的断面收缩率减小,铸坯的热塑性降低。30CrMo精冲钢的第Ⅲ脆性温度区间在650~750°C。将二冷区矫直点入口处的铸坯角部温度提升至800°C以上可以有效避免角部裂纹发生。

关键词: 30CrMo,精冲钢, 高温力学性能, 热塑性,断裂机理

Abstract: The high temperature mechanical properties of 30CrMo fine blanking steel continuous casting slab cooling from 1350 °C with 5 °C/s and 15 °C/s to 600-900 °C and tensioning are tested using Gleeble-3800 thermal simulator. The fracture morphology and microstructure of the tensile specimens are observed and analyzed by scanning electron microscopy, and the mechanism of deformation fracture in each temperature region is discussed. Results demonstrate that with the increase of cooling rate, the overall reduction of area of the slab decreases and the thermo-plasticity of the slab also decreases. The H brittleness temperature range of 30CrMo fine blanking steel is 650 ~750 °C , and raising the comer temperature of the slab in the straightening section of secondary cooling zone to above 800°C can effectively avoid the comer cracking.

段卫平, 袁航, 李京社, 杨树峰. 30CrMo精冲钢连铸板坯高温力学性能研究[J]. 特殊钢, 2021, 42(5): 65-68.

Duan Weiping , Yuan Hang, Lin Jingshe, Yang Shufeng. Study on High Temperature Mechanical Properties of Fine Blanking 30CrMo Steel Continuous Casting Slab[J]. Special Steel, 2021, 42(5): 65-68.

参考文献

[1] 夏琴香，胡玄通，陈登，等.精冲技术的研究现状与发展趋势 [J].锻压技术,2015, 40(7):1-6.
[2] 郑瑞，刘阳春，刘馄，等.国内精冲钢产品的生产现状和发展趋势[J].锻造与冲压,2019(16)：16-18.
[3] 陈璐.精冲材料的现状与发展趋势[J].锻造与冲压，2020 (16)： 21-23.
[4] 袁航，杨树峰，王田田，等.亚包品微合金钢连铸板坯角部横裂纹研究进展[J].中国冶金,2020, 30(10)： 1-8.
[5] 刘军.微合金钢铸坯角部横裂纹控制技术的应用[J].连铸， 2019, 44(3)： 34-38.
[6] 王新华，朱国森，于会香，等.高碳钢连铸板坯高温力学性能 [J].北京科技大学学报，2005 , 27(5): 545-548.
[7] 董凯，刘建华，张佩，等.12CrlMoVC钢连铸妬高温力学性能研究[J].钢铁钮钛，2020, 41(5)：124-129.
[8] 艾松元，龙木军，张梦远，等.L245MB钢铸坯髙温强度与弹性性能研究[J].钢铁，2019, 54(8)：194-201.
[9] 王炜，周律敏，熊力，等.SS400含硼钢连铸坯的高温力学性能[J].钢铁,2015, 50(7)： 38-42.
[10] 郝彦英，白素宏，高琦，等.中碳MnV系列非调质钢连铸坯高温力学性能研究及应用[J].连铸，2015, 40(6):63-66.
[11] 王宁涛，阮士朋，段路昭，等. SAE8640合金钢280 mm x 325 mm连铸坯的高温力学性能[J].特殊钢，2018, 39(1)：68-70.
[12] 邓建军，王咨.高强度冷轧汽车用钢1500MS连铸板坯的高温力学性能[J].特殊钢,2018, 39(1):54-56.
[13] Mintz and Crowther. Hot Ductility of Steels and its Relationship to the Problem of Transverse Cracking in Continuous Casting [J]. Inteniational Materials Reviews,2010, 55(3)：168-196.
[14] Barrie Mintz. The Influence of Composition on the Hot Ductility of Steels and to the Problem of Transverse Cracking [J]. ISIJ International, 1999, 39(9): 833-855.