High-speed steel cross-cut blades

This process replaces the traditional method of welding high-speed steel tools using coke furnaces. A new atmosphere-controlled welding process has been introduced, utilizing a furnace with silicon carbide heating elements. The advantages include: uniform electric heating, precise temperature control, and oxidation-free welding under protective atmosphere. The cutting edge steel and the base material are securely bonded without defects such as insufficient welding or unwelded areas. The brazing and heat treatment processes are completed in the same heating and cooling cycle, achieving a bright hardening effect. The heat treatment hardness reaches HRC 63–65 with excellent uniformity, avoiding potential adverse effects that might result from post-weld heat treatment.

The blades undergo cryogenic treatment in liquid nitrogen at –196°C, which significantly enhances the hardness, red hardness, wear resistance, and impact toughness of the cutting edge steel. This increases the blade service life by 2 to 3 times compared to conventional heat treatment. All production processes are carried out in accordance with Japanese process requirements, ensuring product quality and performance standards.

Straight cross-cut blades, spiral cross-cut blades, and notch fly knives