In recent years, the individuation of blade steel materials has been great progress in the manufacturing industry. Some enterprises design steel composition by themselves according to the product characteristics, and sign the supply and demand agreement with the steel plant. The Cr8 series is the most competitive and has produced great social and economic benefits. It is a new blade material worthy of attention and promotion. Here introduce two heat treatment methods in the steel blade production process.

Computer technology applicated in heat treatment is the progress of computer technology and the demand for industrial development products. To some extent, temperature determines everything. Phase transformation is caused by temperature change, and deformation is caused by temperature. Konetool has successfully and stably applied computer temperature control technology in mechanical blade heat treatment. And it has made great strides forward to intelligent heat treatment.

After normal quenching of high-speed steels, 25%-35% retained austenite(rR). If rR is not stable, it would turn into martensite. During martensitic transformation, when stress is lower than yield strength, plastic deformation will occur. This phenomenon is named martensitic transformation plasticity.

For many years, heat correction of quenched parts is believed can achieve remarkable results. Although it contains factors that will cause thermoplasticity and contribution to good rR plasticity, the most important one is phase transformation superplasticity’s effect. The superplasticity effect of phase transformation occurs in the whole process of R → M phase transition, but this effect is transient. When phase transformation is most intense, the superplasticity effect of phase transformation is the most significant, so the frequency curve of the plastic variable should demonstrate a peak value.

Metal heat treatment is one of the important processes in mechanical manufacturing. Compared with other processing technologies, heat treatment generally does not change the shape and chemical composition of the whole workpiece but endows or improves the performance of the workpiece by changing the internal microstructure or chemical composition of the workpiece surface. Its characteristic is to improve the internal quality of the workpiece, which is generally not visible to the naked eye.