1) Use a cryogenic treatment box with continuous computer monitoring and automatic adjustment of liquid nitrogen input and automatic temperature rise and fall.

2) Treatment process The treatment process consists of three programmed programs of cooling, ultra-low temperature insulation and heating.

1) It transforms austenite with a lower hardness into a harder, more stable martensite with higher wear resistance and heat resistance;

2) Through ultra-low temperature treatment, the crystal lattice of the processed material has more widely distributed carbide particles with higher hardness and finer particle size;

3) It can produce a more uniform, smaller, and denser micro material structure in the metal crystal grain;

4) Due to the additional micro carbide particles and finer crystal lattice, it leads to a denser molecular structure, so that the tiny voids inside the material are greatly reduced;

5) The internal thermal stress and mechanical stress of the material are greatly reduced after ultra-low temperature treatment, which effectively reduces the possibility of cracks and chipping of tools and knives. In addition, because the residual stress in the tool affects the ability of the cutting edge to absorb kinetic energy, the tool after ultra-low temperature treatment not only has higher abrasion resistance, but also the hazard of its own residual stress is greatly reduced than that of the untreated tool;

6) In the processed cemented carbide, due to the reduction of its electronic kinetic energy, a new combination of molecular structure is produced.

Rated power (kW): 35

Working temperature ( degree ): 350

Furnace size (mm): 600×900×450

Loading capacity (kg): 420

　　　It is used for normalizing, annealing and quenching of metal parts. The furnace adopts an energy-saving electric furnace with lightweight refractory bricks and refractory fibers. 1200 degree can be used for heating and quenching of metal or alloy steel parts.