摘要在熔模铸造工艺流程中，型壳的干燥、脱蜡和铸液浇注等三个环节是决定铸件质量的重要工序。在上述工艺过程中，了解温度的变化和温度场的控制是关键。本文在实验条件和生产条件下，采用理论分析和实验验证相结合的方法，使用红外热像仪、热电偶等器材测量了三个环节中型壳、蜡料的温度变化。运用Origin、Excel等软件对数据进行处理、分析，结合传热、传质等传输理论得出了以下研究成果：1、针对型壳干燥过程，使用红外热像仪研究了型壳结构、通风强制干燥以及材料成分对型壳面层干燥的影响规律。使用传质系数判断型壳不同区域干燥快慢，并通过实验对其验证。此外，依据吹风以及制壳材料对干燥的影响规律提出了生产的优化方案，有助于推动企业精益生产。2、针对脱蜡工序，在实验条件和实际生产条件下，对蒸汽脱蜡、闪烧脱蜡过程中型壳以及蜡料的温度变化进行了测量。并且在蒸汽脱蜡工艺中，成功实现了高温高压状态下对蜡料及型壳温度的获取，得出了高压蒸汽状态蜡料从型壳脱除的规律。此外还对比了蒸汽脱蜡和闪烧脱蜡的异同之处。3、针对浇注过程的温度控制，以高温合金和铝铜合金为研究对象，使用K系热电偶研究了浇注过程中型壳的温度变化，验证了高温合金控温手段的有效性以及液态金属强制冷却对减少铝铜合金偏析的可行性。热像仪的引入以及高温高压下温度获取手段的实现有助于更充分的研究和理解熔模铸造中一些关键工艺工序的内在规律，有利于对生产环节的精细控制和提高优良铸件的生产率；液态金属冷却方法的应用，丰富了铸件在浇注后冷却处理的手段，有助于控制铸件组织凝固行为，从而减少偏析的出现。关键词：干燥；脱蜡；浇注；红外热像仪；高温高压

AbstractIn numerous investment casting production process， shell drying， dewaxing， pouring process are very important， for they have a vital role in producing excellent casting. Therefore， the paper focuses on the temperature field of shell and wax in the drying， dewaxing and pouring process. The temperature changes in experimental conditions and actual production conditions are measured using infrared imager ， thermocouple . The obtained data is analyzed ， part of the rules are mastered. This paper unfolds as following:(1) By using infrared thermal imager， the influence laws of the shell shape， dry blow and shell making materials of the shell surface are studied. The formula used as judgment criterion of shell drying speed is deduced and verified. In addition， according to the law that shell making materials and wind how to change the drying， the optimized production plan is put forward. This help to promote enterprise lean production.(2) Under the experimental conditions and actual production conditions， the change of the temperature of the shell and the wax in the flash burn dewaxing process and steam dewaxing process were measured. With the successful implementation of wax and shell temperature acquisition in the high temperature and high pressure condition， it is concluded that how the wax remove from the shell. In addition， the similarities and differences of flash burn dewaxing and steam dewaxing are compared.(3) By using K type thermocouple the casting process of high temperature aluminum-copper alloy was studied， the effectiveness of the methods to control high temperature alloy temperature and forced cooling using liquid metal to reduce the segregation are verified. The introduction of the infrared thermal imager and the realization of the temperature acquisition method under high temperature and high pressure help to more fully study and understand the inherent law of the key process in the investment casting. What’s more， it is good for fine control of production process and helpful to improve the fine casting productivity.Key words : Drying; Dewaxing; Pouring; Infrared Thermal Imager; High Temperature and High Pressure