φ≤150mm 的小型冷轧辊要求整个截面全部淬透,采用频率较高、加热速度很快的中频感应加热是很难实现的,如过分延长感应加热的透热时间,就会使淬火后轧辊性能变坏。采用工频或双频感应对于大、中型冷轧辊淬火可显著提高淬透深度,但用于小型轧辊却有很大局限性。我厂在原来的中频感应加热设备的基础上,配备一台带有预热炉的淬火机床,实现了小轧辊的穿透加热淬火,淬火后组织细密、性能优良。机床的感应器固定,轧辊既能升降又能旋转,机床上设有一台贯通立式电炉,感应 The small cold roll with φ≤150mm requires full quenching of the whole cross section. It is very difficult to realize the medium frequency induction heating with high frequency and fast heating. For example, excessive prolongation of the soaking time of induction heating will make the performance of quenched roll Become bad. The use of frequency or dual-frequency induction For large and medium-sized cold roll quenching can significantly improve the penetration depth, but there are limitations for small rolls. I plant on the basis of the original IF induction heating equipment, equipped with a quenching machine with a preheat furnace, to achieve a small roll penetration quenching, microstructure after quenching, excellent performance. The machine’s sensor is fixed, the roller can both lift and rotate, the machine has a through vertical electric furnace, induction