不锈钢铸造加工属于称熔模精密铸造或精密铸造，是一种少切削或无切削的铸造工艺，是铸造行业中的一项优异的工艺技术。
Stainless steel casting process belongs to investment casting or precision casting. It is a casting process with little or no cutting. It is an excellent technology in the casting industry.
它不仅适用于各种类型、各种合金的铸造，而且生产出的铸件尺寸精度、表面质量比其它铸造方法要高，甚至其它铸造方法难于铸得的复杂、耐高温、不易于加工的铸件，均可采用熔模精密铸造铸得。
It is not only suitable for casting various types and alloys, but also produces castings with higher dimensional accuracy and surface quality than other casting methods. Even complex, high temperature resistant and difficult to process castings which are difficult to obtain by other casting methods can be cast by investment casting.
所谓不锈钢铸造加工，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，后将铸型放入焙烧炉中经过高温焙烧（如采用高强度型壳时，可不必造型而将脱模后的型壳直接焙烧），铸型或型壳经焙烧后，于其中浇注熔融金属而得到铸件。
The so-called stainless steel casting process, in short, is to use fusible materials (such as wax or plastics) to make a fusible model (melting model or model), which is coated with a number of layers of special refractory coatings, after drying and hardening to form a whole shell, then use steam or hot water to melt the model from the shell, and then put the shell in the sand box, and fill it with dry sand moulding around. After that, the mould is put into the calciner and roasted at high temperature (for example, when high strength shell is used, the shell after demoulding can be roasted directly instead of moulding). After the mould or shell is roasted, the molten metal is poured into it to obtain the casting.
不锈钢铸造加工-熔模铸件尺寸精度较高，一般可达CT4-6（砂型铸造为CT10~13，压铸为CT5~7）,当然由于熔模铸造的工艺过程复杂，影响铸件尺寸精度的因素较多，例如模料的收缩、熔模的变形、型壳在加热和冷却过程中的线量变化、合金的收缩率以及在凝固过程中铸件的变形等，所以普通熔模铸件的尺寸精度虽然较高，但其一致性仍需提高（采用中、高温蜡料的铸件尺寸一致性要提高很多）。
The dimension accuracy of stainless steel casting-investment casting is relatively high, generally up to CT4-6 (sand casting is CT10-13, die casting is CT5-7). Of course, due to the complex process of investment casting, there are many factors affecting the dimension accuracy of casting, such as shrinkage of mould material, deformation of investment mould, linear change of shell during heating and cooling, shrinkage rate of alloy and casting during solidification. As a result, the dimensional accuracy of ordinary investment casting is higher, but its consistency still needs to be improved (the dimensional consistency of castings with medium and high temperature wax is much higher).
不锈钢铸造加工压制熔模时，采用型腔表面光洁度高的压型，因此，熔模的表面光洁度也比较高。此外，型壳由耐高温的特殊粘结剂和耐火材料配制成的耐火涂料涂挂在熔模上而制成，与熔融金属直接接触的型腔内表面光洁度高。所以，熔模铸件的表面光洁度比一般铸造件的高，一般可达Ra.1.6~3.2μm。
When pressing the investment mould in stainless steel casting, the high surface finish of the cavity is uwww.apsaLu.cn www.hunLiaoji.com.cn www.jnkeqing.cn www.hanyubw.cowww.ccdrc.cn www.bjguomei.cnsed, so the surface finish of the investment mould is also relatively high. In addition, the shell is made of a refractory coating made of a special high temperature binder and refractory material, which is coated on the melting die. The inner surface of the cavity directly contacted with the molten metal has a high smoothness. Therefore, the surface finish of investment castings is higher than that of ordinary castings, generally up to Ra.1.6-3.2 um.