History of carbide tools

Mon Jul 04 11:57:40 CST 2022

1.What cemented carbide

It is based on high hardness and high melting point metal carbide as the matrix, mainly with carbon as the binder, using powder metallurgy to form a kind of alloy. Its hardness and wear resistance is excellent, high heat resistance, cutting speed can be several times higher than high speed steel. In particular, its high hardness and wear resistance, even at 500 degrees Celsius will not be deformed, still has a high hardness at 1000 degrees Celsius. Now the new hardness alloy cutting tool is equal to carbon steel several times.

2. China is the development of cemented carbide tools.

Now cemented carbide has dominated, up to 70 percent. However, high speed rigid cutting tools are decreasing at a rate of 1-2 percent per year. Now it's basically down to about 30 percent. Diamond, cubic boron nitride ultra-hardness tool proportion of about 3 percent. China's current annual tool sales of 14.5 billion yuan, the proportion of the carbide tool accounted for less than 25%, not only with the international market tool product structure is far from, also can not meet the domestic manufacturing industry to carbide cutting tool growing demand. China's annual output of high-speed steel is about 80,000 tons, accounting for about 40% of the world's total output, consuming a large amount of precious tungsten, molybdenum and other rare resources. This blind expansion of the low level of repetition, so that the production of high speed steel tool a large number of surplus, had to be sold by the government, resulting in a large number of tool production enterprises low efficiency. China's current annual output of cemented carbide 16,000 t, also accounted for about 40% of the world's total output. But carbide products with high value-added cutting tool output of only 3000 t, only 20%. This situation, on the one hand, leads to the shortage of carbide cutting tools, on the other hand, the precious carbide resources have not been fully utilized. In terms of economic benefit, the annual sales income of cemented carbide in China is about 560 million US dollars.  is only 40% of China's production, but the sales revenue is as high as us $2.633 billion, its inserts (cutting tool) proportion is as high as 72%, so that resources have been fully utilized, the enterprise has also obtained good benefits.