The bimetal band saw blade is a high-tech product processed by a series of processes such as electron beam or laser welding, machining, and heat treatment, which uses two different kinds of steels (high-speed steel and backed steel). It is an industrial consumable that is used for metal cutting with a band sawing machine. Band sawing is one of the mainstream cutting methods currently used, and its range of cutting objects is extremely wide, including all kinds of steel and non-ferrous metals such as copper and aluminum.

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At the end of 1985, China produced the first batch of domestically-made bi-metal band saw blades, which opened the beginning of China's bi-metal band saw blade industry. After nearly 30 years of development, the bi-metal band saw blade industry in China has experienced the glorious history of zero-based local brands from scratch, gradually replacing imported brands, and achieving volume export.

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At present, the local brands of bi-metal band saw blades are mainly concentrated in Hunan, Liaoning, and Zhejiang provinces, among which the most representative are: Hunan Taijia New Material Technology Co., Ltd., Hunan Tiancheng Saw Co., Ltd., and Liaoning Benxi Tools. Group Co., Ltd., Benxi Shuangjin Saw Co., Ltd., Dalian Shuangjin Saw Co., Ltd. and Dalian Special Steel Products Co., Ltd., and Zhejiang manufacturers are mainly small-sized enterprises.

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Bimetal band saw blades can be divided into high-speed steel bi-metal band saw blades and hard alloy band saw blades according to the material selection and production process. The former is a bimetal band saw blade obtained by welding two kinds of alloy steels using a laser or electron beam welding process, which is processed by tooth milling, tooth splitting, heat treatment, and the like. Backing materials mainly use spring steel, and tooth materials mainly use high speed alloys. steel. The latter mainly uses cemented carbide as a tooth material. Due to the large difference in material technology, the price of carbide band saw blades is 7 to 9 times the price of high-speed steel band saw blades.

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At this stage, high-speed steel bi-metal band saw blades are the mainstream products of domestic double metal band saw blades. Due to the relatively expensive price and relatively short development history, the scale of production and sales of cemented carbide band saw blades is still far lower than that of high-speed steel bi-metal band saw blades.

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