通过化学成分和生产工艺优化，使钢材的各项性能达到标准要求。
The steel's properties come up the standards by optimizing chemical composition and production process.
本文介绍采用通过化学成分分析、硬度测定及金相组织检测等手段，对轴承损坏原因进行分析的情况。
This paper has described and analyzed the reason of the damaged bearing by means of chemical analysis, the determination of the hardness as well as the metallographic analysis.
通过化学成分分析、硬度试验、宏观和微观检验等方法，对减速机齿轮齿面弧形裂纹的产生原因进行了分析。
The reason of arc crack on retarder gear surface was analyzed by means of chemical composition analysis, hardness testing, macrostructure and microstructure examination.
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