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2219铝合金大直径圆锭铸造性能分析及其改进措施
Analysis and Improvement Measures on Casting Property of 2219 Aluminium Alloy Large Diameter Round Ingot
【摘要】 为了满足新一代运载火箭用超大规格2219铝合金环件的需求,开展了2219铝合金大直径铸锭的研发。但是随着铸锭直径的增大,凝固冷却速度较低,因此出现了铸锭晶粒粗大、合金成分和第二相分布不均匀、主微合金元素固溶程度较低及大量粗大金属间化合物等铸造缺陷。针对这些问题,提出了优化合金化学成分、调整半连续铸造工艺、引入超声铸造、采用多级均匀化热处理等技术措施对铸锭质量进行改善。
【Abstract】 In order to meet the need of large specification 2219 aluminium alloy ring for the new-generation launch vehicles, the large diameter 2219 aluminium alloy round ingot was developed. But with the increase of ingot diameter, the solidification cooling rate reached a lower level. Then casting defects, such as coarse grain size, the unevenly distribution of alloy composition and second phase, the lower levels solid solution of main micro-alloy element, a lot of intermetallic compounds and so on, appeared in the aluminium alloy ingot. In view of these problems, technical measures, including optimizing alloy composition, adjusting process parameters of semi-continuous casting, adopting ultrasonic casting process, using multi-homogenizing heat treatment, were proposed to improve the ingot quality.
【Key words】 large diameter round ingot; 2219 aluminium alloy; casting property; improvement measures;
- 【文献出处】 航天制造技术 ,Aerospace Manufacturing Technology , 编辑部邮箱 ,2014年06期
- 【分类号】V261.31
- 【被引频次】19
- 【下载频次】359