现代熔模精密铸造方法在工业生产中得到实际应用是在二十世纪四十年代。当时航空喷气发动机的发展,要求制造象叶片、叶轮、喷嘴等形状复杂,尺寸精确以及表面光洁的耐热合金零件。由于耐热合金材料难于机械加工,零件形状复杂,以致不能或难于用其它方法制造,因此,需要寻找一种新的精密的成型工艺,于是借鉴古代流传下来的失蜡精密铸造,经过对材料和工艺的改进,现代熔模精密铸造方法在古代工艺的基础上获得重要的发展。所以,航空工业的发展推动了熔模精密铸造的应用,而熔模精密铸造的不断改进和完善,也为航空工业进一步提高性能创造了有利的条件。
The
practical application of modern investment casting methods in
industrial production was in the 1940s. At that time, the development of
aviation jet engines required the manufacturing of heat-resistant alloy
parts with complex shapes, precise dimensions, and smooth surfaces,
such as blades, impellers, and nozzles. Due to the difficulty of
mechanical processing of heat-resistant alloy materials and the complex
shape of parts, it is impossible or difficult to manufacture them using
other methods. Therefore, it is necessary to find a new precision
forming process. Therefore, drawing on the wax loss precision casting
that has been passed down from ancient times, modern investment casting
methods have achieved significant development on the basis of ancient
technology through improvements in materials and processes. Therefore,
the development of the aviation industry has promoted the application of
investment casting, and the continuous improvement and improvement of
investment casting have also created favorable conditions for the
aviation industry to further improve its performance.
我国是于上世纪五、六十年代开始将熔模精密铸造应用于工业生产。其后这种先进的精密铸造工艺得到巨大的发展,相继在航空、汽车、机床、船舶、内燃机、气轮机、电讯仪器、武器、医疗器械以及刀具等制造工业中被广泛采用,同时也用于工艺美术品的制造。
China
began to apply investment casting to industrial production in the 1950s
and 1960s. Subsequently, this advanced precision casting process
underwent tremendous development and was widely adopted in manufacturing
industries such as aviation, automobiles, machine tools, ships,
internal combustion engines, gas turbines, telecommunications
instruments, weapons, medical equipment, and cutting tools, as well as
in the manufacturing of arts and crafts.
所谓熔模精密铸造工艺,简单说就是用易熔材料(例如蜡料或塑料)制成可熔性模型(简称熔模或模型),在其上涂覆若干层特制的耐火涂料,经过干燥和硬化形成一个整体型壳后,再用蒸汽或热水从型壳中熔掉模型,然后把型壳置于砂箱中,在其四周填充干砂造型
The
so-called investment casting process, in simple terms, refers to the
use of fusible materials (such as wax or plastic) to make a fusible
model (referred to as investment mold or model), which is coated with
several layers of specially made refractory coatings. After drying and
hardening to form a whole shell, the model is melted away from the shell
by steam or hot water, and then placed in a sand box, filled with dry
sand around it for molding