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音频技术在蠕墨铸铁检测中的应用
Application of Audio Frequency Method in Vermicular Graphite Cast Iron Inspection
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- DOI:
- 作者:
- 周飞
ZHOU Fei
- 作者单位:
- 安徽海立精密铸造有限公司
Anhui Highly Precision Casting Co., Ltd., Ma'anshan 238101,China
- 关键词:
- 蠕墨铸铁 蠕化率 音频频率
vermicular graphite cast iron vermicular graphite rate audio frequency value
- 摘要:
- 蠕墨铸铁传统判定蠕化率的检测方式是在同一批铸件中抽样检测本体金相,该方式具有检测准确的优点。缺点是当铸件质量不稳定时,不能满足对所有铸件产品进行百分之百的检测。结合音频检测的原理,H公司与设备商开发了一套蠕墨铸铁飞轮音频设备,对飞轮金相(不同蠕化率)与音频进行了对比试验。结果表明,音频检测法是可靠的,飞轮的蠕化率与音频频率成线性关系,并确定了音频频率检测范围。此外,音频法还可以间接检测敲击处是否存在缺陷。The traditional method to determine vermicular rate of vermicular cast iron was to sample and test the metallography of the same batch of castings. The disadvantage was that when the casting quality was unstable, it can not meet the requirement of 100% inspection of all casting products. Combined with the principle of audio detection, H company and the equipment manufacturer developed a set of vermicular graphite cast iron flywheel audio equipment, and carried out a comparative test between the flywheel metallography(different vermicular rates) and audio. The results show that the audio-frequency detection method is reliable, and the creep rate of flywheel is linear with the audio-frequency, and the audio-frequency detection range is determined. In addition, the audio method can also indirectly detect whether there is a defect at the percussion.