| 引用本文: | 盈 亮,贾治域,常 颖,唐行辉,李树娟,靳 菲,赵坤民.高强度热冲压钢板强韧性工艺优化研究[J].材料科学与工艺,2013,21(6):72-77.DOI:10.11951/j.issn.1005-0299.20130613. |
| YING Liang,JIA Zhi-yu,CHANG Ying,TANG Xing-hui,LI Shu-juan,JIN Fei,ZHAO Kun-min.Optimization of strength and toughness parameters in hot stamping process for ultra high strength steel[J].Materials Science and Technology,2013,21(6):72-77.DOI:10.11951/j.issn.1005-0299.20130613. |
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| 高强度热冲压钢板强韧性工艺优化研究 |
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盈 亮1,贾治域2,常 颖1,唐行辉1,李树娟1,靳 菲1,赵坤民1
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(1.大连理工大学 工业装备结构分析国家重点实验室 汽车工程学院,辽宁 大连 116024; ;2.北京汽车股份有限公司 汽车工程研究院,北京 101300)
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| 摘要: |
| 为改善强韧性,本文基于热冲压高强度钢板强度、塑性和韧性指标,选取加热温度、保温时间和开始淬火温度为设计因子,引入Kahn试验获得高强度热冲压硼钢撕裂强度和单位面积裂纹形核功来表征材料断裂韧性,进行多指标综合评分的L9(34)正交试验设计,以研究不同淬火工艺参数对热冲压高强钢强韧性的影响规律.结果表明:在加热温度为920~950℃、保温时间1min、开始淬火温度为650~700℃条件下,热冲压硼钢SPFH具有优良的成形性能和强韧化指标.采用优化后工艺进行典型车身结构件热冲压试验,其撕裂强度、单位面积裂纹形核功和强韧比分别提升10.91%、20.32%和22.17%,在保证强度的基础上韧性得到了大幅度提高. |
| 关键词: 高强钢 强韧性 工艺参数优化 撕裂强度 热冲压 Kahn试验 |
| DOI：10.11951/j.issn.1005-0299.20130613 |
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| 基金项目:国家自然科学基金资助项目(10932003)；国家重点基础研究发展计划资助项目(2010CB832700)；国家工信部04重大专项资助项目(2011ZX04001-021)；中央高校基本科研业务费(DUT12LK03；DUT12RC(3)100);教育部留学回国人员科研启动基金联合资助. |
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| Optimization of strength and toughness parameters in hot stamping process for ultra high strength steel |
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YING Liang1,JIA Zhi-yu2,CHANG Ying1,TANG Xing-hui1,LI Shu-juan1,JIN Fei1,ZHAO Kun-min1
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(1. State Key Laboratory of Structural Analysis for Industrial Equipment, School of Automotive Engineering, Dalian University of Technology, Dalian 116024,China; ;2. BAIC MOTOR Corporation,Ltd. Beijing Auto motive Technology Center, Beijing 10130,China)
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| Abstract: |
| To improve the strength and toughness, the effect of heating temperature, holding time and quenching temperature on strength and toughness of born steel SPFH was researched, and L9(34) orthogonal experiment was carried out based on the Kahn tear method to obtain the value of fracture toughness and unit initiation energy(UIE) for SPFH steel. The results indicated that the excellent formability and high strength and toughness for born steel SPFH with 1.6mm thickness was obtained when the heating temperature was from 920to 950℃, the holding time in 1min and the quenching temperature was 650～700℃. Optimum parameters were used in hot stamping test for typical structural parts, and the properties of specimen such as tear strength, unit initiation energy and the ratio of unit initiation energy to strength was improved by 10.91％, 20.32％ and 22.17％ respectively. Toughness was increased substantially on the basis of a small decrease of strength. |
| Key words: high strength steel strength and toughness properties optimizing process parameters tear strength hot forming kahn test |
