| 减少铸造Al-Si合金Sr变质潜伏时间工艺研究 |
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| 引用本文： | 王琳,杨欢庆.减少铸造Al-Si合金Sr变质潜伏时间工艺研究[J].火箭推进,2013,39(1):58-64. |
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| 作者姓名： | 王琳 杨欢庆 |
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| 作者单位： | 西安航天发动机厂,陕西西安,710100 |
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| 摘 要： | Sr变质潜伏时间延长除了给生产带来很多不便外,还会造成Sr烧损增加,变质效果衰退以及铝合金表面氧化-吸氢加剧,对合金造成污染,其中液态金属温度,液态金属的对流强度,Al-Sr合金的几何尺寸及表面状态是影响Sr变质潜伏时间的重要因素。通过建立物理模型,对Sr扩散过程进行流场模拟计算,并进行了试验验证。通过工艺改进,Sr变质潜伏时间由60分钟,缩短至20分钟,变质后合金性能优良,Al-Sr合金取得了良好的变质效果。
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| 关 键 词： | Sr变质 变质潜伏时间 Al-Si合金 |
Process study to reduce Sr modification latent time of Al-Si alloy |
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| WANG Lin
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YANG Huan-qing.Process study to reduce Sr modification latent time of Al-Si alloy[J].Journal of Rocket Propulsion,2013,39(1):58-64. |
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| Authors: | WANG Lin YANG Huan-qing |
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| Institution: | (Xi’an Aerospace Engine Factoty,Xi’an 710100,China) |
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| Abstract: | Besides inconvenience in production, the extension of Sr modification latent time will cause the increase of Sr melting loss, recession of modification effect, increase of oxidation-hydrogen absorption on Al alloy surface, and eventually the pollution of the alloy. The temperature and convection strength of the liquid metal and the geometric dimension and surface state of Al-Sr alloy are important factors that influence Sr modification latent time. Flow field simulation and calculation of Sr diffusion were conducted by establishing physical model and verified by tests. After process optimization Sr modification latent time was reduced from 60 min to 20 min with excellent modification effect of Al-Sr alloy. Al-Si alloy possessed good properties after modification. |
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| Keywords: | Sr modification modification latent time Al-Si alloy |
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