高强韧钢淬火-配分工艺中碳配分计算模型的研究进展  

Research Progress of Calculation Models for Carbon Partitioning During Quenching-Partitioning Process in High Strength and Toughness Steel

作　　者：刘杨 王刚[1] 王岭 齐鹏远[1] 杨健 王博全 郑伟 LIU Yang;WANG Gang;WANG Ling;QI Pengyuan;YANG Jian;WANG Boquan;ZHENG Wei(School of Materials Science and Engineering,Yingkou Institute of Technology,Yingkou 115014,Liaoning,China)

机构地区：[1]营口理工学院材料科学与工程学院,辽宁营口115014

出　　处：《材料导报》2024年第8期229-237,共9页Materials Reports

基　　金：辽宁省自然基金区域创新联合基金计划(2020-YKLH-26,2021-YKLH-01)。

摘　　要：淬火-配分(QP)钢作为第三代先进高强钢,为汽车轻量化、能源使用效率提升及更早地实现“碳达峰、碳中和”的目标提供了重要保障。在淬火-配分(QP)工艺中,淬火过程形成初始组织(残余奥氏体+马氏体),配分过程则是保留和稳定残余奥氏体的关键环节。QP钢配分时除了会发生碳配分,还常常伴有置换原子短程扩散、奥氏体/马氏体界面迁移、奥氏体/马氏体间相变、奥氏体/贝氏体间相变及碳化物析出等现象,使得对配分过程组织演化和碳浓度分布的研究变得十分困难。国内外学者以相关实验为基础,针对具体配分过程提出了许多计算模型,以达到对最终组织相组成的准确预测,并揭示配分过程中多现象同时发生的潜在机制。本文从以下两方面对QP钢碳配分过程的计算模型进行了综述:(1)基于热力学和动力学建立的计算模型,主要包括理想化的CCE模型、考虑界面移动性的QP-PE模型和QP-LE模型、考虑碳化物析出的CCEθ模型和QPT-LE模型、考虑贝氏体相变的耦合模型以及考虑多现象同时发生的耦合模型;(2)利用相场手段进行的相关计算模拟。最后,对今后碳配分过程的模拟计算研究前景做出展望。Quenching-partitioning(QP)steel,as the typical representative of the third generation of advanced high strength steel,provides an important guarantee for automotive lightweight,improving energy efficiency and realizing carbon peak and carbon neutralization.In quenching-partitioning(QP)process,the initial microstructure(residual austenite+martensite)is formed during quenching,and the partitioning process is the key to retaining and stabilizing the residual austenite.In addition to carbon partitioning there are often some phenomena such as short-range diffusion of substitutional atoms,austenite/martensite interface migration,austenite/martensite transformation,austenite/bainite transformation and carbide precipitation occurring in the partitioning process of QP steel,which make it difficult to study the microstructure evolution and the carbon concentration distribution.On the basis of corresponding experiments,many calculation models have been put forward to explore the underlying mechanism of complex phenomena in the specific partitioning process.In this paper,the calculation models of carbon partitioning process in QP steel are reviewed from the following two perspectives:(1)the calculation models that are based on thermodynamics and dynamics,including the ideal CCE model,QP-PE model and QP-LE model with considering interface mobility,CCEθmodel and QPT-LE model with considering carbide precipitation,the coupling model with considering bainite transformation and the coupling model with considering the simultaneous occurrence of multiple phenomena;(2)the adoption of phase field method to performing relevant calculation simulation.Finally,future research prospects for the calculation model for carbon partitioning are discussed.

关 键 词：先进钢 淬火-配分 碳配分 强韧性 计算模型 

分 类 号：TG142.1[一般工业技术—材料科学与工程]