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熔模鑄件尺寸精度較高,一般可達CT4-6(砂型鑄造為CT10~13,壓鑄為CT5~7),當然由于熔模鑄造的工藝過程復雜,影響鑄件尺寸精度的因素較多,例如模料的收縮、熔模的變形、型殼在加熱和冷卻過程中的線量變化、合金的收縮率以及在凝固過程中鑄件的變形等,所以普通熔模鑄件的尺寸精度雖然較高,但其一致性仍需提高(采用中、高溫蠟料的鑄件尺寸一致性要提高很多)。
The dimension precision of investment casting is higher, 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 precision of the casting, such as the shrinkage of the mold, the deformation of the investment mold, the linear change of the shell during heating and cooling, the shrinkage of the alloy. As well as in the solidification process of casting deformation, so although the ordinary investment casting size accuracy is higher, but its consistency still needs to be improved (using medium and high temperature wax casting size consistency to improve a lot).