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苏联灰铸铁的牌号一般都用机械性能的要求来表示的。例如Cч21-40铸铁,就表示抗拉强度为21公斤/公厘2,抗弯强度为40公斤/公厘2。但对于某一种牌号铸铁的化学成分,还必须根据铸件厚度和其他有关条件来决定。这里介绍一种根据铸件所应具有的机械性能、铸件厚度和浇铸方法来求得铸件化学成分的方法。
Soviet Union gray cast iron grades are generally used to represent the requirements of mechanical properties. For example Cч 21-40 cast iron means that the tensile strength is 21 kg / mm 2 and the bending strength is 40 kg / mm 2. But for a certain type of cast iron chemical composition, but also must be based on casting thickness and other relevant conditions to decide. Here is a description of a casting casting should have the mechanical properties, casting thickness and casting method to obtain the chemical composition of the casting method.