铸件缺陷的种类很多，分析铸件缺陷及成因，检验铸件质量，修补铸件的缺陷对于铸件生产工艺优化至关重要。
本文基于音频检测原理构建了可实现铸件缺陷快速检测的音频检测系统。
According to the resonant acoustic principle, a nondestructive inspection system of fast detecting the casting defects is constructed in this paper.
结合生产实际介绍了消失模铸造的一些技术要点，并分析了常见的铸件缺陷。
Important points about EPC are introduced, and the defects of castings are analyzed in this paper.
介绍了溶解扩散焊修复灰铸铁铸件缺陷技术的特点、原理、工艺及应用效果。
Characteristics, principle, process and application result of the technique to use melting diffusing welding to repair defect of gray iron castings was described.
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