感應加熱設備的加熱深度是多少？

當感應加熱設備的功率為30kw，頻率為20KHZ，加熱時間為5s時，45鋼表面的加熱深度是多少？

The range of 15-50KHz is called super audio frequency induction heating power supply, and the depth of super audio frequency induction heating is 1.5-4mm