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.
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。
Two novel technologies which are radically different from traditional SPD methods, such as large strain machining(LSM) and large strain extrusion machining(LSEM), were introduced.
并介绍了两种完全有别于传统的剧烈塑性变形制备超细晶和纳米晶金属材料的最新工艺，如大应变切削和大应变挤压切削。
Discuss the change between the numerical control machining and the traditional machine methods from nine aspects, such as working procedure define, cutting parameter, thermal deformation, etc...
从工序定义、切削用量、热变形等九个方面讨论数控加工相对于传统加工在工艺上产生的变革。
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