复合铸造技术在特种产品上的应用

介绍了将复合铸造技术运用到航空炸弹中的复杂工件,特别是大型薄壁铝合金舱体的优势。分析了石膏型熔模铸造结合真空增压技术的特点,同时,采用该技术研制大型复杂薄壁铝合金铸件,通过合理设计铸件浇注系统,选择铸型工艺,优化浇注工艺参数和严格控制固溶处理温度与校形时机,提高了铝合金的充型能力,改善了铸件的致密度和针孔度,解决了大型薄壁铸件充型及内部质量难以控制的难题。

Application of Precision Casting Technology in Specialty Products

The advantages of investment casting applied to complicated workpieces, especially a large-scale thin-walled aluminum alloy cases, of aerial bombs were discussed. The characteristics of plaster mold investment casting combined with vacuum pressurization technology were analyzed. Meanwhile, by reasonably designing a casting pouring system, selecting pouring processes, optimizing pouring process parameters and precisely controlling solid solution treatment temperature and correction time, the investment casting technology improved the filling capacity, compactness and porosity of the large-scale thin-walled complicated aluminum alloy casting. The problems of control difficulty in filling and internal quality of the large- scale thin-walled casting were solved.