连续退火工艺对440MPa级含La高强IF钢组织和性能的影响

doi:10.13251/j.issn.0254-6051.2020.02.015

金属热处理 ›› 2020, Vol. 45 ›› Issue (2): 76-80.DOI: 10.13251/j.issn.0254-6051.2020.02.015

连续退火工艺对440MPa级含La高强IF钢组织和性能的影响

任志恒¹, 任慧平^1,2, 金自力², 李玮²

1. 内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室, 内蒙古包头 014010;
2. 内蒙古科技大学材料与冶金学院, 内蒙古包头 014010

收稿日期:2019-08-18 出版日期:2020-02-25 发布日期:2020-04-03
通讯作者: 任慧平,教授,E-mail:renhuiping@imust.edu.cn
作者简介:任志恒(1993—),男,硕士研究生,主要从事高强汽车板连续退火工艺的研究,联系电话:15847637312,E-mail:296770496@qq.com。
基金资助:
国家自然科学基金(50761005);内蒙古自治区科技重大专项(0902061701)

Effect of continuous annealing on microstructure and properties of 440 MPa grade high strength IF steel containing lanthanum

Ren Zhiheng¹, Ren Huiping^1,2, Jin Zili², Li Wei²

1. Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resource, Baotou Inner Mongolia 014010, China;
2. School of Material and Metallurgy, Inner Mongolia University of Science and Technology, Baotou Inner Mongolia 014010, China

Received:2019-08-18 Online:2020-02-25 Published:2020-04-03

摘要/Abstract

摘要：

通过用热模拟试验机对440MPa级含La高强IF钢经过不同连续退火工艺下的组织、析出物和性能进行研究,分析了连续退火工艺对组织和性能的影响。结果表明:440MPa级含La高强IF钢在连续退火过程中,在800℃,120m/min的退火工艺下能发生完全再结晶,并且提升退火板带的运行速度能有效的细化晶粒,减少FeTiP的析出并优化织构,从而提升板材的硬度和深冲性能,得到合格产品。

关键词: 高强IF钢, La, 连续退火, 织构, 性能

Abstract:

Microstructure, precipitates and properties of 440 MPa grade high strength IF steel containing lanthanum under different continuous annealing conditions were studied by thermal simulation tester. The influence of continuous annealing process on the microstructure and properties of the tested steel was analyzed. The results show that, under the continuous annealing process of 800 ℃-120 m/min, complete recrystallization occurs, the grain size is refined effectively by increasing the running speed of the strip, the precipitation of FeTiP is reduced, and the texture is optimized, thereby improving the hardness and deep drawing properties of the sheet then obtaining qualified products.

Key words: high strength IF steel, La, continuous annealing, texture, properties

中图分类号:

TG142.1

任志恒, 任慧平, 金自力, 李玮. 连续退火工艺对440MPa级含La高强IF钢组织和性能的影响[J]. 金属热处理, 2020, 45(2): 76-80.

Ren Zhiheng, Ren Huiping, Jin Zili, Li Wei. Effect of continuous annealing on microstructure and properties of 440 MPa grade high strength IF steel containing lanthanum[J]. HTM, 2020, 45(2): 76-80.

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连续退火工艺对440MPa级含La高强IF钢组织和性能的影响

Effect of continuous annealing on microstructure and properties of 440 MPa grade high strength IF steel containing lanthanum

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