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Product Introduction of Low Temperature Tempering Furnace
The main use of low temperature tempering furnace: normalizing, annealing, and quenching of metal parts. The furnace uses energy-saving electric furnaces made of lightweight refractory bricks and refractory fibers. 1200 ℃ can be used for heating and quenching of metal or alloy steel parts.

Main technical parameters of low temperature tempering furnace:

Rated power (kw): 35

Maximum working temperature (℃): 350

Hearth size (mm): 600 × 900 × 450

Loading capacity (kg): 420

Process method of low temperature tempering furnace:

1) Cryogenic treatment using equipment with computer continuous monitoring and automatic adjustment of liquid nitrogen ingress and automatic temperature rise and fall

2) Processing process The processing process consists of three programs: precision cooling, ultra-low temperature insulation and heating. The reasons why cryogenic treatment can improve performance are as follows:

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

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

3) It can produce more uniform, smaller, and micro material structures with greater density in metal grains;

4) Due to the addition of micro-carbide particles and a finer crystal lattice, it leads to a denser molecular structure, and the tiny voids in the material are greatly reduced;

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

6) In the treated cemented carbide, a new combination of molecular structures is produced due to the decrease of its electronic kinetic energy.

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Keywords: low temperature tempering furnace

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