应根据工件材料、硬度及加工要求，选择适当的砂轮进行磨削。
Select the suitable wheel. Need wheel to grind base on the workpiece material, rigidity and manufacturing requirement.
在适当的压力、温度环境下合成致密度、弯曲强度、断裂韧性、硬度值可满足实际应用背景的梯度夹层。
The compacting density, bending strength, fracture toughness and rigidity value of the synthesis can be prepared to be applicable gradient material structure under suitable pressure and temperature.
根据显微组织和硬度检测结果，适当调整热处理工艺，可进一步提高弹簧的疲劳寿命。
According to microstructure and the results of hardness test, appropriate adjustment of heat treatment could promote fatigue lift of spring steel.
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