Hardening of Cast Steel Crankshaft Surface by Induction Heating

Induction heating is one of the most commonly used methods for hardening the surface of cast steel crankshafts. The process involves the use of high-frequency electrical current to heat the surface of the crankshaft to a temperature above its critical temperature, which is the temperature at which the steel undergoes a phase transformation from austenite to martensite. The surface is then quenched rapidly to produce a hard, wear-resistant surface layer.

Advantages of Induction Heating for Crankshaft Surface Hardening

Induction heating offers several advantages over other surface hardening methods such as carburising, nitriding or normalising. These advantages are:

- Faster heating rates: Induction heating provides rapid and uniform heating of the crankshaft surface, resulting in reduced processing times.
- Precise temperature control: The temperature of the crankshaft surface can be accurately controlled using induction heating, resulting in consistent and repeatable hardening results.
- Reduced distortion: Induction heating produces minimal distortion of the crankshaft, resulting in improved dimensional accuracy and reduced machining costs.
- Reduced energy consumption: Induction heating consumes less energy compared to other surface hardening methods, resulting in lower operating costs.
- Environmentally friendly: Induction heating produces fewer emissions compared to other surface hardening methods, making it a more environmentally friendly option.

Conclusion

Induction heating is a highly effective method for hardening the surface of cast steel crankshafts, offering numerous advantages over other surface hardening methods. Its rapid heating rates, precise temperature control, reduced distortion, lower energy consumption and environmental friendliness make it a popular option for crankshaft manufacturers worldwide.

Cast steel crankshaft is hardened by
induction heating ans