Chief application: brightness heat treatment for high speed steel, die steel, martensite stainless steel, high alloy steel, Ti-alloy etc. Characteristics: 1. Many kinds of application, e.g. quenching, tempering, annealing, brazing or sintering etc. 2. Automatic program control, stable operation. Man-machine interface (option) 3. Powerful cooling capability, wide application range of quenching. 4. Uniform heating and cooling, small deformation of the workpieces 5. Saving energy, non atmosphere pollution 6. Many kinds of protective function, safe operation. 7. Conversion-trans speed regulation of the cooling fan (option), flexible cooling mode.