Views: 0 Author: Site Editor Publish Time: 2022-06-14 Origin: Site
Serrated knives have the advantages of high hardness and good wear resistance. It is widely used in the paper industry, packaging industry, tobacco industry, food industry, recycling industry, and other fields. It is commonly used in paper shredders, packaging machines, and other machinery. At present, the Serrated knives on the market are mainly made of SKD-11 and cemented carbide (tungsten steel). This article will briefly introduce the advantages of using high-speed steel as the raw material of Serrated knives.
Brief introduction of high-speed steel
Advantages of using high-speed steel
High-speed steel (HSS) is a kind of tool steel with high hardness, high wear resistance, and high heat resistance, also known as high-speed tool steel or front steel, commonly known as white steel. High-speed steel was created by F.W. Taylor and M. white in 1898.
High-speed steel has good process performance and a good combination of strength and toughness. Therefore, it is mainly used to manufacture complex thin edge and impact-resistant metal cutting tools, as well as high-temperature bearings and cold extrusion molds. In addition to the high-speed steel produced by the smelting method, powder metallurgy high-speed steel appeared after the 1960s. Its advantage is to avoid the reduction of mechanical properties and heat treatment deformation caused by carbide segregation caused by the smelting method.
High-speed steel is a kind of alloy steel with complex composition, which contains carbide forming elements such as tungsten, molybdenum, chromium, vanadium, and cobalt. The total amount of alloy elements is about 10 ~ 25%. It can produce high heat in high-speed cutting, maintain high hardness at about 500 ℃, and HRC can be more than 60. This is the main characteristic of high-speed steel - red hardness. After quenching and low-temperature tempering, carbon tool steel has high hardness at room temperature, but when the temperature is higher than 200 ℃, the hardness decreases sharply. At 500 ℃, the hardness has been reduced to a degree similar to the annealing state, completely losing the ability to cut metal, which limits the use of carbon tool steel in making cutting tools. High-speed steel, due to its good red hardness, makes up for the fatal shortcomings of carbon tool steel and can be used to manufacture cutting tools.
High-speed steel generally does not do tensile strength inspection, but mainly metallographic and hardness inspection. After proper heat treatment, the Rockwell hardness of tungsten and molybdenum high-speed steel can reach more than 63 and that of cobalt high-speed steel is more than 65. The acid impregnated macrostructure of steel shall be free of visible shrinkage and peeling. The center is loose. Generally, the porosity should be less than grade 1. Metallographic examination mainly includes three items: decarburization layer, microstructure, and carbide non-uniformity.
The use of high-speed steel as the raw material of Serrated knives can effectively ensure the hardness of the blade. When the blade performs production tasks, it is not easy to break and affects the production efficiency. In addition, high-quality high-speed steel materials can also save the maintenance cost of the machine for manufacturers.
The above is the content of this article. Maanshan King knife Machinery Co., Ltd is a blade manufacturer integrating production and sales. We can produce any type of blade according to customer requirements and meet the cutting quality required for packaging cutting blades. If you are interested in our products, please contact us for detailed information and quotation!
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