Phone: +86 13303078975

Induction Heat Treatment – Quenching

The reasons for the occurrence of cracks in steel bars during the quenching process of Induction heating equipment may include the following:

1. Excessive cooling rate: Rate firing is the process of rapidly cooling materials to form martensitic structure. If the cooling rate is too fast, especially within an unsuitable temperature range, it may lead to uneven stress on the surface and inside of the material, resulting in thermal stress and cracking.

2. Excessive temperature gradient: When the steel rod undergoes a large temperature gradient during the firing process, the shrinkage and stress distribution of the material will be uneven. This may lead to surface and internal stresses exceeding the strength limit of the material, resulting in cracks.induction hardening furnace

3 Defects or pre existing strong lines: If there are defects, cracks, or internal stress concentration areas in the steel rod itself, the stress during the firing process will be concentrated in these areas, leading to crack propagation.

4. Material selection and organizational structure issues: If materials that are not suitable for quenching are selected or the organizational structure of the materials is uneven, it may lead to cracks during the quenching process.

5. Unsuitable cooling medium or temperature: Different steels require the use of suitable cooling medium and temperature for firing. If incorrect cooling medium or temperature is used, it may lead to too fast or too slow cooling rate, which can cause cracks.steel bar quenching furnace

6. Improper equipment operation: Improper operation or adjustment of equipment parameters may lead to uneven quenching process, which in turn can lead to the generation of cracks.


Overseas manager: Tom Wang

Phone: 0086-13303078975(whatsapp, wechat,line)

Specialist of  bar heat treatment furnace in China; Glad to be your business partner in induction heating field.

Post time: 08-15-2023