对淬火介质的选择，淬火过程的控制，以及回火处理也作了介绍。
The selection of cooling medium, control of quenching process, as well as tempering treatment was also described.
其研究结果对于不同参数的齿轮在选择合理激光工艺参数，以避免发生背面回火方面具有实际应用价值。
The result provides practical value for selecting reasonable laser technology parameters to avoid back-tempering for different gear parameters.
本文所选择的的材料为淬火+低温回火状态的NM360A，具有优秀的耐磨性能。
The material chosen for this paper is NM360A whose heat treatment state is quenching + tempering at low temperature, it has excellent wear resistant performance.
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