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铸件质量是一个综合性概念。从现代的观点来看,铸件质量要从产品质量、工艺过程质量和铸件设计质量三方面考虑。提高铸件质量要有控制指标。根据出国考察和资料,先进工业国家重要铸铁件的控制指标(包括内控)多达14项,而我国只考核很少几个机械性能和金相组织。对国外增加的共晶团数、共晶饱和度、相对强度、相对硬度、弹性模量和控制共晶团的过冷度及过冷度比等,下面讨论它们的概念和意义。
Casting quality is a comprehensive concept. From a modern point of view, casting quality from the product quality, process quality and casting design quality considerations. Improve casting quality control indicators. According to overseas inspection and information, advanced industrial countries, the control of important cast iron pieces (including internal control) as many as 14, and only a few of our assessment of the mechanical properties and microstructure. The number of eutectic groups, eutectic saturation, relative strength, relative hardness, elastic modulus and the degree of supercooling and supercooling of the eutectic groups are also discussed. The concepts and meanings of these eutectic compositions are discussed below.