Heat treatment applicated in fabrication of Carbide Circular Slitter Round Blade

Published On: August 21, 2020

Tungsten carbide circular saw blade is a necessary cutting tools for wood, paper, metal, print and other industries. It covers a lot of specifications and varieties, so difficulty of heat treatment is large. As the evolution of above industries, amount of Carbide Circular Slitter Round Blade for cutting tool is increasing year by year. Machine object of mechanical blade is mainly non-metallic material, cutting edge is thin and slender. Owing to particularity of processing, carbide circular saw blade is supposed to not only keep strong toughness, high hardness and certain thermal hardness, but also has high anti fatigue fracture and carbide anti spalling ability. Especially planner cutter and rotary cutter used in wood processing, behavior in service requirements are higher.


Carbide circular saw blades for cutting tool production process is need to be explained. Exists two kinds of materials now for Carbide Circular Slitter Round Blade: alloy steel and high speed steel. Latter covers two forming methods: brazing and high temperature of join materials. Next I will introduce some heat treatment.

Non-oxidizing protective atmosphere heating technology

Steel parts is likely to emerge defects like oxidation and decarburization when heated in air. To avoid those disadvantages, people fill neutral atmosphere to furnace, for instance, nitrogen. To protect and heat workpiece, this technology is called protective atmosphere heat treatment. Nitrogen is numerous in air, covers about 79% of air. To acquire nitrogen in industry, oxidation and nitrogen in air can be separated by chemical or physical way. Nitrogen in molecular state is neutral to general steel and metal in heat process. It neither oxidizes, decarbonizes nor reduces oxides. Use nitrogen based atmosphere is prospects of heat treatment, it is energy saving and environmental protection.


Rapid heating technology

In cutting tool heat treatment craft, two most important process parameters must mention here, namely heating temperature and heating time. Based on accordance to formula that P=t(37tgts). In the formula, P equals quenching heating parameter; T means heating temperature; TS equals heating time.

Generally, the higher the austenitizing temperature is, the better the carbide circular slitter round blade’s wear resistance and thermal hardness are. However, considering grain refinement and toughness improvement, quenching temperature should not be too high. In line with use characteristic of workpiece, lower quenching heat temperature and longer holding time should be adopted, yet this will waste much energy. Through repeated practice, rapid heating technology is explored. It means using higher temperature and shorter time to make blade hard and tough. From the formula, it can be seen that effect of increasing temperature is better than prolonging time. As long as the parameters of the two functions are same, effect of heat treatment should be same too. In the production,people realized that the concept of “degree” must be mastered in the process of rapid heating, otherwise it will be self defeating.


Heat treatment is core competence of tungsten carbide circular saw blade production.Konetool offers a variety of Carbide circular saw blades for cutting tool with complete specifications. Some products can supply in stock. Non-standard products can be produced in accrodance for product drawing, specifications, materials and hardness value provided by customers. Welcome to order products from all over the world and we will provide professional service for you.

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