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離心鑄造Ti47Al 2Nb1Cr1W0.2Si合金汽車氣閥的鑄造特性
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廣東省中國科學院全面戰(zhàn)略合作項目專項資金（2011B090300013）


Cast Characteristics of Ti47Al2Nb1Cr1W0.2Si Alloy Car Valves by Centrifugal Casting
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    摘要:

    采用等溫淬火與金相觀察相結(jié)合的方法研究了離心鑄造Ti47Al 2Nb1Cr1W0.2Si合金的凝固特征。確定了合金的固、液相線溫度分別為1465和1520 ℃。應(yīng)用一次真空感應(yīng)熔煉離心鑄造氣閥，獲得過熱度對氣閥成型性及氧含量的影響規(guī)律，確定了使氣閥獲得良好成型且氧含量低的最佳過熱度為160 ℃。

    Abstract:

    The solidification characteristics of centrifugal casting Ti47Al2Nb1Cr1W0.2Si alloy was studied by means of the isothermal quenching technology and optical microscope (OM) observation. The solidus and liquidus of the alloy were determined to be 1465 °C and 1520 °C, respectively. The Ti47Al2Nb1Cr1W0.2Si alloy car valves were cast with different superheats by the single step centrifugal casting process. The influence of the superheat on the fraction of fully filled mould and oxygen content of valve was studied. The results show that the best superheat for casting car valves is 160 °C.

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馬穎澈,熊 超,陳 波,高 明,劉 奎.離心鑄造Ti47Al 2Nb1Cr1W0.2Si合金汽車氣閥的鑄造特性[J].稀有金屬材料與工程,2012,41(7):1293~1297.[Ma Yingche, Xiong Chao, Chen Bo, Gao Ming, Liu Kui. Cast Characteristics of Ti47Al2Nb1Cr1W0.2Si Alloy Car Valves by Centrifugal Casting[J]. Rare Metal Materials and Engineering,2012,41(7):1293~1297.]
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  • 收稿日期:2011-07-29
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