表面凹槽形态对Q-P-T钢成形能力预测的影响
Influence of Surface Groove Morphology on Formability Prediction of Q-P-T Steel
摘 要
为了确定成形极限图(FLD)理论的凹槽模型中合理的凹槽角度和凹槽深度比, 以新型淬火-分配-回火(Q-P-T)钢为研究对象, 分别制备了凹槽深度比为5%, 10%, 15%, 25%和凹槽角度为45°, 60°, 90°的拉伸试样, 经单轴拉伸试验后, 采用不同的本构模型对拉伸曲线进行拟合, 随后利用Swift-Hill公式对单轴拉伸条件下的极限应变值进行了计算, 并将理论预测值与经验数据进行比较。结果表明: 合适的FLD理论计算应取凹槽深度比为5%左右, 凹槽角度等于或小于45°; 单轴拉伸条件下极限应变值的计算方法为构成完整FLD的其它加载方式下的极限应变理论预测奠定了基础。
成形极限图
凹槽模型
单轴拉伸
quenching-partitioning-tempering(Q-P-T) steel
forming limit diagram (FLD)
groove model
uniaxial tension
Abstract
In order to determine the reasonable groove angle and groove depth ratio in groove models of forming limit diagram (FLD) theory, the novel quenching-partitioning-tempering (Q-P-T) steel was investigated. Some tensile samples with different groove angles (45°, 60°, 90°) and groove depth ratios (5%, 10%, 15%, 25%) were prepared, and their uniaxial tests were also performed. After that, different constitutive models were used to fit the tensile curves, and the strain limit values under uniaxial tension were calculated by using Swift-Hill equation and compared to the empirical data. The results indicate that the most suitable situation for predicting FLD was determined at the groove depth ratio being 5% and the groove angle being equal to or smaller than 45°. The calculation method of strain limit values under uniaxial tension is the base of those of strain limit values under other loading modes composing whole FLD.
中图分类号 TG142 DOI 10.11973/jxgccl201508003
所属栏目 试验研究
基金项目 国家自然科学基金重点资助项目(51031001)和面上项目(51371117)
收稿日期 2013/12/16
修改稿日期 2014/11/8
网络出版日期
作者单位点击查看
备注龚俊杰(1989-),男,浙江义乌人,硕士研究生。
引用该论文: GONG Jun-jie,HAO Qing-guo,ZUO Xun-wei,GUO Zheng-hong,CHEN Nai-lu,RONG Yong-hua. Influence of Surface Groove Morphology on Formability Prediction of Q-P-T Steel[J]. Materials for mechancial engineering, 2015, 39(8): 16～21
龚俊杰,郝庆国,左训伟,郭正洪,陈乃录,戎咏华. 表面凹槽形态对Q-P-T钢成形能力预测的影响[J]. 机械工程材料, 2015, 39(8): 16～21
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参考文献
【1】徐祖耀. 用于超高强度钢的淬火-碳分配-回火 (沉淀)(QPT) 工艺 ［J］.热处理,2008,23(2): 1-5.
【2】RONG Y H. High strength ductility steels treated by novel quenching-partitioning-tempering process［J］.International Heat Treatment & Surface Engineering,2011,5(4): 145-154.
【3】ZHANG K, ZHANG M, GUO Z, et al. A new effect of retained austenite on ductility enhancement in high-strength quenching-partitioning-tempering martensitic steel［J］.Materials Science and Engineering: A,2011,528(29): 8486-8491.
【4】ZHOU S, ZHANG K, WANG Y, et al. The mechanism of high strength-ductility steel produced by a novel quenching-partitioning-tempering process and the mechanical stability of retained austenite at elevated temperatures［J］.Metallurgical and Materials Transactions: A,2012,43(3): 1026-1034.
【5】SWIFT H W. Plastic instability under plane stress［J］.Journal of the Mechanics and Physics of Solids,1952,1(1): 1-18.
【6】HILL R. On discontinuous plastic states, with special reference to localized necking in thin sheets［J］.Journal of the Mechanics and Physics of Solids,1952,1(1): 19-30.
【7】MARCINIAK Z, KUCZYSKI K. Limit strains in the processes of stretch-forming sheet metal［J］.International Journal of Mechanical Sciences,1967,9(9): 609-620.
【8】ZHOU Y, NEALE K W. Predictions of forming limit diagrams using a rate-sensitive crystal plasticity model［J］.International Journal of Mechanical Sciences,1995,37(1): 1-20.
【9】ASARO R J, NEEDLEMAN A. Overview no. 42 texture development and strain hardening in rate dependent polycrystals［J］.Acta Metallurgica,1985,33(6): 923-953.
【10】WU P D, NEALE K W, VAN DER GIESSEN E. On crystal plasticity FLD analysis［J］.Mathematical, Physical and Engineering Sciences,1997,453: 1831-1848.
【11】GB/T 228-2002金属材料室温拉伸试验方法［S］.
【12】KOC P, TOK B. Computer-aided identification of the yield curve of a sheet metal after onset of necking［J］.Computational Materials Science,2004,31(1): 155-168.
【13】DZIALLACH S, BLECK W, BLUMBACH M, et al. Sheet metal testing and flow curve determination under multiaxial conditions［J］.Advanced Engineering Materials,2007,9(11): 987-994.
【14】余海燕,陈关龙,李淑慧.TRIP高强度钢板成形极限的实验研究［J］.中国机械工程, 2001,15(23): 2158-2161.
【2】RONG Y H. High strength ductility steels treated by novel quenching-partitioning-tempering process［J］.International Heat Treatment & Surface Engineering,2011,5(4): 145-154.
【3】ZHANG K, ZHANG M, GUO Z, et al. A new effect of retained austenite on ductility enhancement in high-strength quenching-partitioning-tempering martensitic steel［J］.Materials Science and Engineering: A,2011,528(29): 8486-8491.
【4】ZHOU S, ZHANG K, WANG Y, et al. The mechanism of high strength-ductility steel produced by a novel quenching-partitioning-tempering process and the mechanical stability of retained austenite at elevated temperatures［J］.Metallurgical and Materials Transactions: A,2012,43(3): 1026-1034.
【5】SWIFT H W. Plastic instability under plane stress［J］.Journal of the Mechanics and Physics of Solids,1952,1(1): 1-18.
【6】HILL R. On discontinuous plastic states, with special reference to localized necking in thin sheets［J］.Journal of the Mechanics and Physics of Solids,1952,1(1): 19-30.
【7】MARCINIAK Z, KUCZYSKI K. Limit strains in the processes of stretch-forming sheet metal［J］.International Journal of Mechanical Sciences,1967,9(9): 609-620.
【8】ZHOU Y, NEALE K W. Predictions of forming limit diagrams using a rate-sensitive crystal plasticity model［J］.International Journal of Mechanical Sciences,1995,37(1): 1-20.
【9】ASARO R J, NEEDLEMAN A. Overview no. 42 texture development and strain hardening in rate dependent polycrystals［J］.Acta Metallurgica,1985,33(6): 923-953.
【10】WU P D, NEALE K W, VAN DER GIESSEN E. On crystal plasticity FLD analysis［J］.Mathematical, Physical and Engineering Sciences,1997,453: 1831-1848.
【11】GB/T 228-2002金属材料室温拉伸试验方法［S］.
【12】KOC P, TOK B. Computer-aided identification of the yield curve of a sheet metal after onset of necking［J］.Computational Materials Science,2004,31(1): 155-168.
【13】DZIALLACH S, BLECK W, BLUMBACH M, et al. Sheet metal testing and flow curve determination under multiaxial conditions［J］.Advanced Engineering Materials,2007,9(11): 987-994.
【14】余海燕,陈关龙,李淑慧.TRIP高强度钢板成形极限的实验研究［J］.中国机械工程, 2001,15(23): 2158-2161.
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