Heat Treatment Process and Structure of a Low Carbon Super-high Strength Quenching and Partitioning Steel Plate

Special Steel ›› 2009, Vol. 30 ›› Issue (5): 68-70.

Heat Treatment Process and Structure of a Low Carbon Super-high Strength Quenching and Partitioning Steel Plate

Dong Chen , Jiang Haitao , Chen Yulai , Tang Di , Cheng Zhisong

National Engineering Research Center for Advanced Rolling Technology,University of Science and Technology,Beijing 100083

Received:2009-04-16 Online:2009-10-01 Published:2022-11-17
Contact: Chen Yulai

低碳超高强度Q & P钢板的热处理工艺和组织性能

董辰，江海涛，陈雨来，唐获，程知松

北京科技大学高效轧制国家工程研究中心，北京 100083

通讯作者: 陈雨来
作者简介:董辰(1983-)，男，硕土研究生，高强度汽车板Q&P钢的开发和研究。

Abstract

Abstract: Test Q & P(quenching and partitioning)steel(%:0. 17C,1.40Si,1.48Mn,0.25Al)was melted a 7.5 kg vacuum induction furnace then rolled to 1.0~1.5 mm plate.The heat treatment process of the test Q & P steel plate was simulated by a shaft salt bath furnace with austenizing at 910 ℃,quenching to 200~245 ℃ for 20 s,heating to parti-tioning temperature 300～450℃ for 60～600 s,then quick cooling.Results show that with quenching to 245℃ for 20 s, partitioning at 300～350℃ for ≥300 s,it is available to assure the carbon atom accumulating to residual austenite from martensite and get high product of strength-elongation(25000～30000 MPa%).

Key words: Q &, P Steel, Heat Treatment, Structure, Strength and Elongation

摘要： 试验的Q & P(淬火和配分)钢(%:0.17C、1.40Si、1.48Mn、0.25Al)由7.5 kg真空感应炉冶炼,轧成1.0～1.5 mm钢板,采用井式盐浴炉模拟了试验Q & P钢的热处理工艺,经910℃奥氏体化,淬至200～245℃,20 s,升温至配分温度300～450℃,60～600 s,快冷。结果表明,采用淬火245℃ 20 s,配分300～350℃≥300 s可保证碳原子由马氏体向残留奥氏体富集,试验钢具有高的强塑积(25000～30000 MPa%)。

关键词: Q &, P钢, 热处理, 组织, 强度和塑性

Dong Chen , Jiang Haitao , Chen Yulai , Tang Di , Cheng Zhisong. Heat Treatment Process and Structure of a Low Carbon Super-high Strength Quenching and Partitioning Steel Plate[J]. Special Steel, 2009, 30(5): 68-70.

董辰, 江海涛, 陈雨来, 唐获, 程知松. 低碳超高强度Q & P钢板的热处理工艺和组织性能[J]. 特殊钢, 2009, 30(5): 68-70.

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