高频加热机高效且节能

2019-07-09 9:13:34

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高频加热机是目前对金属材料加热效率较高、速度快，低耗节能环保型的感应加热设备。

高频加热机的特点是温度集中在表层，这就是为什么具有高效，节能和小变形的优点。然而，由于从硬化层到芯的温度急剧变化，在过渡区中经常引起大的残余拉应力。

从高频加热机淬火冷轧辊残余应力的分布可以清楚地看到这一现象，对于经回火预热处理的工件，在感应加热过程中，其中一个过渡区的回火温度高于回火温度，但低于A，过渡回火区最终将变为弱区。

因此，对于感应加热设备的淬火齿轮，如果硬化层较浅，在硬剪应力和外部载荷形成的高残余拉伸应力的共同作用下，弱过渡区很可能会产生疲劳裂纹，会导致硬化层剥落。

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