采用低倍检验、金相检验及化学成分分析等方法对火车轮箍机加工出现裂纹的原因进行了分析。
Methods such as macroscopic evaluation, metallography examination and chemical composition analysis were used to study the forming reason of crack in machining process of tyres for train.
分别进行了塔形发纹检验、显微组织分析、低倍酸浸试验及断口试验分析，确定出该曲轴中的主要缺陷为“白点”。
The article talks about crank crack of shearing machine caused by flakes through testing tower-shaped texture and fracture, dipping in less-acid solution and analyzing its microstructure.
采用低倍组织试验、化学成分分析及金相检验等方法，对出现边裂的带钢卷进行了解剖分析。
Structure testing in low magnificution, chemical composition analysis and microstructure examination were used to analyze the edge cracking of strip steel coil.
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