| 引用本文: | 常颖,卢金栋,靳菲,盈亮,王斌,王存宇,赵坤民.热成形中材料热物性参数对Beck反算KIHTC的影响[J].哈尔滨工业大学学报,2015,47(3):97.DOI:10.11918/j.issn.0367-6234.2015.03.017 |
| CHANG Ying,LU Jindong,JIN Fei,YING Liang,WANG Bin,WANG Cunyu,ZHAO Kunmin.Influence of thermal properties on KIHTC in hot forming[J].Journal of Harbin Institute of Technology,2015,47(3):97.DOI:10.11918/j.issn.0367-6234.2015.03.017 |
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| 热成形中材料热物性参数对Beck反算KIHTC的影响 |
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常颖1,2, 卢金栋2, 靳菲2, 盈亮2, 王斌2, 王存宇3, 赵坤民1,2
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(1. 工业装备结构分析重点实验室(大连理工大学), 116024 辽宁 大连; 2. 大连理工大学 汽车工程学院, 116024 辽宁 大连; 3. 钢铁研究总院 特殊钢研究所, 100081 北京)
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| 摘要: |
| 为探究22MnB5钢板热冲区过程中影响换热强度因素、准确求解KIHTC, 利用Beck反算法,准确求解热成形22MnB5高强钢在冲压淬火过程中的界面换热系数KIHTC, 并分析了模具和样件热物性参数的改变对KIHTC的影响．研究中利用自制圆台试验模型和自主开发的Beck反算法程序,分别通过选取不同模具材料(45号钢、H13钢)的方式和通过选用淬火过程中有马氏体相变的22MnB5钢与无相变的AISI-304不锈钢对比的方式来分别研究模具热物性参数的改变和硼钢淬火马氏体相变过程热物性参数的改变对热成形工艺中KIHTC的影响．分析结果表明:22MnB5钢样件与45号钢模具间的KIHTC要比与H13钢模具间的KIHTC大,其中导热系数的改变对KIHTC的改变起主导作用;马氏体相变的发生,对KIHTC产生正向增益的效果,且增益量约30.2％,同样,相变前后导热系数的差异对KIHTC的改变起主导作用． |
| 关键词: 热成形 界面换热系数 Beck反算法 热物性参数 马氏体相变 |
| DOI：10.11918/j.issn.0367-6234.2015.03.017 |
| 分类号:TG156 |
| 基金项目:国家自然科学基金(51101036);中央高校基本科研业务基金(DUT12RC(3)100)． |
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| Influence of thermal properties on KIHTC in hot forming |
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CHANG Ying1,2, LU Jindong2, JIN Fei2, YING Liang2, WANG Bin2, WANG Cunyu3, ZHAO Kunmin1,2
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(1. State Key Laboratory of Industrial Equipment Structural Analysis(Dalian University of Technology), 116024 Dalian, Liaoning, China; 2. School of Automotive Engineering, Dalian University of Technology, 116024 Dalian, Liaoning China; 3. Institute for Special Steels, Central Iron ＆ Steel Research Institute, 100081 Beijing, China)
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| Abstract: |
| To study the factors which can influce the thermal properties of both die and specimen, calculate the Interfacial Heat Transfer Coefficient(KIHTC) during hot stamping process is very important. A round table test and Beck′s inverse estimation method were used to study the relationship between the thermal properties and the KIHTC. The dies were made of materials with different thermal conductivity and heat capacity. The thermal properties in terms of martensite transformation were obtained by using specimen made of 22MnB5 sheet. Specimen made of stainless steel AISI-304 that does not have martensite transformation during quenching were tested as well for comparison. The results show that the KIHTC between boron steel specimen and die of ＃45 Steel is larger than that of H13 Steel (approximately twice as much) and the thermal conductivity plays a significant role; the martensite transformation yields a positive gain on KIHTC (approximately by 30.2％) and the change in thermal conductivity before and after phase transformation is a major contributor. |
| Key words: hot forming KIHTC Beck′s inverse estimation method thermal physical properties of material martensite transformation |
