Knife and scissors vacuum heat treatment

In the international market, the cutting tool manufacturing industry in Japan and West Germany is very developed, and the technology and quality are in a leading position in the world, especially in terms of raw materials, which are superior to my country’s knife and scissors industry. Therefore, for the weak link of domestic knife and scissors manufacturing, first of all A breakthrough has been made in the manufacturing process, so that the product quality is close to the international level and the international competitiveness is improved.

At present, a few domestic manufacturers of tool product heat treatment use very backward coal-fired and gas-fired furnaces, and most manufacturers use resistance furnaces for heat treatment. However, these heat treatment methods generally have low efficiency, large energy consumption and low control accuracy. Unstable product quality, low-grade knives and scissors, etc., make it impossible to compete with the international market. Therefore, in the knife and scissors product industry, the heat treatment is transformed from a resistance furnace to a vacuum furnace heat treatment knife and scissors products that use a vacuum furnace for heat treatment, which is an important item in the production process of the knife and scissors industry.

Vacuum furnace technical indicators:
①Maximum working temperature is 1350ºC.
②Furnace temperature uniformity≤+5ºC.
③Ultimate vacuum degree 6×1-3.
④Pressure rise rate 06>Pa/H.
⑤The air cooling pressure is 6bar.

Compared with the traditional resistance fan heat treatment thermal process, the vacuum heat treatment process has the following characteristics:
①Low energy consumption;
② high production efficiency;
③ The production control process cost is low;
④Save labor cost;
⑤Environmental protection

The heat treatment process of knives and scissors is a key process that determines the quality of knives and scissors. Many domestic manufacturers meet the specified hardness requirements in heat treatment, and various process indicators are uneven. The high-grade products of advanced countries give full play to the microstructure and properties of the material after heat treatment, resulting in high and uniform hardness, while the difference in hardness between a knife and shear is very small, the metallographic structure shows fine grains, and the tempered martensite structure is uniform. , to ensure the best function of the knife and scissors when used.

Equipment selection: The RHVB series vacuum brazing furnace produced by SIMUWU is a high-quality product for the vacuum heat treatment of tooling and molds. Good temperature control accuracy and temperature control uniformity ensure the effective progress of the vacuum brazing process. SIMUWU specializes in the manufacture of vacuum furnaces, has more than ten years of relevant experience, and has a good reputation in the field of vacuum furnace manufacturing. The product line includes vacuum air quenching furnace, vacuum oil quenching furnace, vacuum brazing furnace, etc., which are widely sold in developed and developing countries.