The influence of surface condition on N80 tubing laser enhancement is studied for obtaining better surface enhancement layer.
为获得较好的表面强化层，研究了表面状态对N80油管激光强化的影响。
The result showed that hardness of crankshaft and cooling way had direct influences on enhancement of surface hardness of nitrocarburizing layer.
结果表明：曲轴基体硬度和冷却方式对共渗层表面硬度的提高有着直接的影响。
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