1. What is a hard alloy?
It is based on a high hardness and high melting point metal carbide as a matrix, mainly using carbon as a binder to form an alloy by powder metallurgy. Its hardness and wear resistance are excellent, heat resistance is high, and the cutting speed can be several times higher than that of high speed steel. In particular, his high hardness and wear resistance are not deformed even at 500 degrees Celsius, and still have a high hardness at 1000 degrees Celsius. Now the cutting of the new hardness alloy tool is equal to several times that of carbon steel.
2. Development of cemented carbide tools in China.
Cemented carbide is now dominant, reaching 70 percent. However, high-speed cutting tools are being reduced by 1-2 percent per year. Now it has basically dropped to around 30 percent. The proportion of ultra-hardness tools such as diamond and cubic boron nitride accounts for about 3 percent. China's current annual tool sales of 14.5 billion yuan, its proportion of cemented carbide tools is less than 25%, not only far from the international market tool product structure, but also can not meet the growing demand for cemented carbide tools in the domestic manufacturing industry. China's current annual output of high-speed steel is about 80,000 tons, accounting for about 40% of the world's total output, and consumes a lot of precious resources such as tungsten and molybdenum. This blind expansion of low-level repetition has resulted in a large surplus of high-speed steel tools and has to be sold at low prices, resulting in a low profitability of a large number of tool manufacturers. China's current annual output of cemented carbide is 16,000 tons, which also accounts for about 40% of the global total. However, the highest value-added cutting inserts for cemented carbide products are only 3,000 tons, accounting for only 20%. This situation, on the one hand, has caused insufficient supply of cemented carbide tools in the country, and on the other hand, the precious carbide resources have not been fully utilized. In terms of economic benefits, China's annual sales revenue of cemented carbide is about 560 million US dollars; Japan only produces 40% of China's output, but its sales revenue is as high as 2.633 billion US dollars, and its blade (knives) proportion is as high as 72%, making resources It has been fully utilized and the company has also achieved good results. China's tool industry should get some useful enlightenment. At present, the imbalance of the tool structure produces the tool and the demand is not right. For example, users need a large gap in cemented carbide tools, but high-speed steel tools are over-produced; modern manufacturing urgently needs high-efficiency tool gaps, but low-grade standard tools are over-produced.
History of cemented carbide tools
1. What is a hard alloy?