薄板坯连铸连轧C-Si-Mn TRIP钢组织和力学性能的研究

特殊钢 ›› 2005, Vol. 26 ›› Issue (6): 32-34.

薄板坯连铸连轧C-Si-Mn TRIP钢组织和力学性能的研究

张迎晖,康永林,于浩,刘晓,方圆

1北京科技大学材料科学与工程学院，北京100083;
2上海宝钢集团公司，上海200941;
3江西理工大学材料与化学工程学院，赣州341000

收稿日期:2005-06-30 出版日期:2005-11-08 发布日期:2023-04-12
基金资助:
国家自然科学基金资助项目(50334010)

Study on Structure and Mechanical Properties of C-Si-Mn TRIP Steel Produced by Thin Slab Casting and Rolling Process

Zhang Yinghui,Kang Yonglin,Yu Hao,Liu Xiao,Fang Yuan

1 Materials Science and Engineering School,University of Science and Technology Beijing,Beijing 100083;
2 Baosteel Group Co,Shanghai 200941;
3 Materials and Chemical Engineering School,Jiangxi University of Science and Technology,Ganzhou 341000

Received:2005-06-30 Published:2005-11-08 Online:2023-04-12
About author:张边晖(1968-),女，副教授，1993年东北大学毕业，从事薄板坯连铸连轧产品的工艺、组织性能研究。

摘要/Abstract

摘要： 用Gleeble-1500热/力模拟机研究了成分(%)为:0.20C-1.08Si-1.43Mn TRIP(相变诱导塑性)钢连续冷却时的组织,并测得动态CCT(连续冷却转变)曲线,得出冷却速度达10℃/s时出现粒状贝氏体,冷却速度15℃/s时得到板条贝氏体。在实验室模拟C-Si-Mn TRIP钢薄板坯连铸连轧工艺试验:用10 kg真空感应炉冶炼,成分(%)为:0.20C-1.54Si-1.55Mn的TRIP钢,钢锭尺寸为(mm):60×100×130,经7道次轧制成厚度6.40 mm板,终轧温度810℃,轧后空冷至700℃,再水冷至400℃模拟卷取。试验结果表明,该钢组织含有5.13%残余奥氏体,37.20%贝氏体,机械性能σ_b715 MPa,σ_s520 MPa,屈强比0.73,δ20%。

关键词: C-Si-Mn TRIP钢, 动态 CCT 曲线, 组织, 力学性能

Abstract: The structure of TRIP(transfornation induced plasticity)steel 0.20C- 1.08Si- 1.43Mn during continuous cooling has been studied by Gleeble- 1500 thermal simulation machine to get CCT( continuous cooling transforation)curves and to obtain that the bainite particle occured with cooling rate 10 ℃/s and the lath bainite got with cooling rate 15 ℃/s. The thin slab casting and rolling process test of 0.20C- 1.54Si- 1.55Mn TRIP steel melted by a 10 kg vacuum induction furnace with ingot dimension 60 mm×100 mm×130 mm was carried out in laboratory which was rolled to 6.40 mm plat by 7 pass rolling with finish rolling at temperature 810 ℃,and air cooling to 700 ℃ than water cooling to 400 ℃ to simulate coiling. The test results showed that there was 5. 13% retained austenite,37.20% bainite and the rest-ferrite in structure of steel,of which the mechanical property- σ_b was 715 MPa,σ_s 520 MPa,ratio of yield strength to tensile strength 0.73 and elongation δ 20%.

Key words: C-Si-Mn TRIP Steel,Dynamic CCT Curves,Structure,Mechanical Properties

张迎晖, 康永林, 于浩, 刘晓, 方圆. 薄板坯连铸连轧C-Si-Mn TRIP钢组织和力学性能的研究[J]. 特殊钢, 2005, 26(6): 32-34.

Zhang Yinghui, Kang Yonglin, Yu Hao, Liu Xiao, Fang Yuan. Study on Structure and Mechanical Properties of C-Si-Mn TRIP Steel Produced by Thin Slab Casting and Rolling Process[J]. Special Steel, 2005, 26(6): 32-34.