由於大型铸件断面的厚薄相差很大，冷却速率不一，而造成铸件的变形及表 面硬度不匀。为此，采用了很多方法（如加　水，把薄断面加厚等）来补救。虽 然化费了很多工时，但仍然未能解决。昆明机床厂在工作中虚心地学习并使用了苏 联的冷砖铸造的方法後，解决了上述的铸件缺陷，提高了机床的质量。简化了铸造 的工序，降低了铸件的成本。今特介绍如下，供各厂学习参考。 As a result of large sections of large casting thickness vary greatly, the cooling rate varies, resulting in deformation of the casting and uneven surface hardness. To this end, a lot of methods (such as adding water, thickening the thin section, etc.) to remedy. Although it costs a lot of working hours, it still can not be solved. Kunming Machine Tool Plant in the work humbly learning and using the Soviet Union’s cold brick casting method to solve the casting defects, improve the quality of the machine tool. Simplify the casting process, reducing the cost of casting. Now introduced as follows, for the factory learning reference.