| 大型锻件坯料内裂纹愈合的物理模拟 |
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| 作者姓名： | 米国发 张军强 徐斌 孙明月 |
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| 作者单位： | 河南理工大学材料科学与工程学院,焦作,454000;河南理工大学材料科学与工程学院,焦作454000;中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳110016;中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳110016;中国科学院金属研究所核用材料与安全评价重点实验室,沈阳110016 |
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| 基金项目： | 国家重点研发计划资助项目(2016YFB0300401)国家自然科学基金-辽宁联合基金资助项目(U1508215)辽宁百千万人才工程项目[2015]12资助项目 |
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| 摘 要： | 针对锻造过程中钢锭内部裂纹缺陷的愈合情况进行研究,设计了裂纹愈合的实验室模拟实验与工业级模拟实验.通过在Gleeble热压缩试样中预制裂纹缺陷,研究了变形温度和变形量对内部裂纹愈合的影响,发现变形温度越高,变形量越大,内裂纹的愈合效果越好.为了验证Gleeble实验结果的准确性,保证其结果在实际锻造生产中的适用性,设计了锻件内部裂纹愈合的工业级模拟实验.结果表明在1200℃,变形量为40%时,可以有效焊合锻件内部裂纹.
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| 关 键 词： | 大型锻件 内裂纹 愈合 变形 变形温度 |
| 收稿时间： | 2017-03-20 |
Physical simulation of internal crack healing in a heavy-forged billet |
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| Affiliation: | 1) School of Material Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China2) Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China3) Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China |
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| Abstract: | The healing behavior of internal cracks in an ingot during the forging process was investigated using laboratory and industrial simulation studies. During the laboratory experiment, specimens with artificial cracks were hot compressed by a Gleeble simulator, and the effect of temperature and deformation ratio on inner crack healing was studied. The experimental result shows that the higher the deformation temperature or greater the deformation, the better the healing effect. To verify the accuracy and applicability of the result in an actual forging process, an industrial experiment was designed and performed. The result shows that internal cracks can be effectively metallurgically bonded at a temperature of 1200℃ and deformation ratio of 40%. |
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