Now, with the tool of domestic consumption in hardware manufacturing, carbide cutting tools proportion reached 50%, and supply and demand structure disjointed problem is very serious. The consequence is a large excess of high-speed steel cutting tools at low export or domestic sales, while high-performance carbide cutting tools had to rely heavily on imports, imports increased from $ 090 million in 2001 up to 2005 of $ 450 million (about 3.6 billion yuan). International Association Secretary-General Luo Baihui mold that structural imbalance is a tool tool production and demand wrong way. For example: the user needs carbide gap is large, but high-speed steel cutting tools overproduction; modern manufacturing and efficient tool needed gap is large, but low-grade standard tool but overproduction.
In developed countries, currently accounts for carbide cutting tools dominance, the proportion reached 70%. The high-speed steel cutting tools at an annual rate of 1% to 2% of the rate reduction, the current proportion has dropped to below 30%. Diamond, cubic boron nitride and other superhard tools accounted for about 3%.
China's current annual output of 16,000 tons carbide, also accounted for about 40% of global output. However, the highest value-added products in the carbide cutting inserts yield only three thousand tons, accounting for only 20%. This situation, on the one hand carbide cutting tools are badly needed supply, it also makes a valuable Carbide resources are not being fully utilized.From the economic aspect of comparison, the annual sales income of carbide approximately $ 560 million; Japan is only 40% of our production, but sales of up to $ 2,633,000,000, of which blades (knives) the proportion of up to 72%, so that resources are fully utilized, companies also received good benefits. China's Tool Industry should get some useful lessons.International Association Secretary-General Luo Baihui mold pointed out that China should focus on high-quality tool market. In recent years, several high-end manufacturing technology to the tool brings new requirements. Such as automotive tool must have high efficiency, high stability and characteristics of specialization, and with the continuous development of the automobile industry forward, new requirements have emerged, from the technical point of view, there are heavy, complex, specialized, standardized, high-speed and species diversification trend. In the aerospace manufacturing sector, with the titanium, high temperature alloys and other difficult materials widely used, how to properly select, rational use of high-quality tool for efficient machining has become a very important industry-specific topics.
Made knives should have provided for the Molybdenum tube field service tool has a climate, geography, and the advantages. But in fact, import tool basically occupied the machining industry's high-end users, especially in the automotive engine manufacturing plant, aircraft engine manufacturers machine shop or turbine manufacturing plant, efficient, high-precision machining tool in almost import tool monopoly, it is difficult to see traces of domestic knives. And made knives are mostly used in medium and low requirements of the customer base, as seen in agricultural machinery, motorcycles, agricultural vehicles, general machinery and low-grade machinery manufacturing industry.
Moreover, the manufacturing sector led to extensive development tools and tool development is highly uneven, according to the International Association Secretary-General Luo Baihui mold, CNC machine tools currently developed countries and tool consumption ratio is 2:1, while the ratio of domestic low total consumption of machine tool consumption is less than the total 1/5 Many manufacturing companies spend millions to buy the machine, but the tool consumption timid, reluctant to buy advanced and efficient tool, traditional tools chronically high market demand, which is many domestic enterprises are unwilling to enter the advanced and efficient tool tool production of important reasons.
Molybdenum carbide has a high melting point and hardness, good thermal stability and mechanical stability, and excellent corrosion resistance and other characteristics. Molybdenum is a silvery white refractory metal, a melting point of 2615 ℃, density of 10.2 g / cm 3, the expansion coefficient is small, a special tube is almost the same coefficient of expansion of the glass. Molybdenum stable at room temperature is higher than 600 ℃, rapidly oxidized.
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