This paper has analyzed the causes of foundry defects and proposed the ways to prevent foundry defects so as to improve the quality of castings.
就铸造缺陷的成因及如何采取措施防止铸造缺陷的产生，提高铸件质量作简单的分析。
Comprehend foundry technics, familiar with the casting defects in the form of easy to produce.
对铸造工艺有一定了解，熟悉铸件易产生的缺陷形式。
Foundry method, melting process, heat treatment process for nodular iron crankshaft was introduced and the measures to prevent common defects were described.
介绍了球墨铸铁曲轴的铸造方法、熔炼工艺和热处理工艺，同时描述了预防一般缺陷的措施。
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