| 汽车增压器涡轮用铸造高温合金热裂研究进展 |
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| 引用本文： | 石照夏,董建新,张麦仓.汽车增压器涡轮用铸造高温合金热裂研究进展[J].材料工程,2012(6):91-96. |
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| 作者姓名： | 石照夏 董建新 张麦仓 |
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| 作者单位： | 北京科技大学高温合金研究室,北京,100083 |
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| 摘 要： | 采用高温合金浇注汽车增压器涡轮时,叶片极易产生热裂,热裂的存在严重影响了铸造高温合金在增压涡轮上的使用。介绍了几种目前国内广泛使用的汽车增压器涡轮用铸造高温合金,对铸件热裂的形成机理进行了综述,重点探讨了铝、钛、碳、锆和铪等元素对铸造高温合金热裂倾向性的影响。综述了合金凝固方式和铸型性质、浇注条件、铸件结构、浇注系统等铸造工艺参数对热裂的影响,并提出了防止热裂产生的措施。
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| 关 键 词： | 汽车增压器涡轮 铸造高温合金 热裂 |
Development of Hot Tearing on Cast Superalloys Used for Auto Turbocharger Turbine Wheel |
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| SHI Zhao-xia
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DONG Jian-xin
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ZHANG Mai-cang.Development of Hot Tearing on Cast Superalloys Used for Auto Turbocharger Turbine Wheel[J].Journal of Materials Engineering,2012(6):91-96. |
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| Authors: | SHI Zhao-xia DONG Jian-xin ZHANG Mai-cang |
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| Affiliation: | (High Temperature Materials Research Laboratories,University of Science & Technology Beijing,Beijing 100083,China) |
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| Abstract: | Hot tearing tended to occur in the turbine wheel blade when superalloys were used for auto turbocharger turbine wheel,which affected the application of cast superalloys used in turbocharger turbine wheel.Several cast superalloys which were currently widely used in auto turbocharger turbine wheel were introduced.The hot tearing mechanisms for castings were reviewed.Effects of the elements,such as Al,Ti,C,Zr and Hf on hot tearing susceptibility of cast superalloys were emphatically analyzed.Effects of solidification mode of superalloys and casting process parameters,such as characteristics of moulds,pouring conditions,constructions of castings and pouring system on hot tearing were also reviewed.In addition,measures to prevent hot tearing were proposed. |
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| Keywords: | auto turbocharger turbine wheel cast superalloy hot tearing |
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