Tungsten market: domestic economic environment continued to slump, lack of tungsten market funds, business operations are not active, despite the current market is still more inquiry, but the actual volume was light, the buyer continued to actively keep the prices down, the seller cheap goods will go low, The two sides deadlocked, the high cost of tungsten concentrate the stock market, low-cost shipping that is facing a loss, so shipments will hold stocks lower part of even still working capital, the desire to purchase low-cost supply, in order to lower the average inventory cost, lower loss. Mainstream waste tungsten market remains steady sidelines, despite the weakening of the business mentality, but the price is not strong willingness mostly, of course, no shortage of cash-strapped businesses part of low-cost shipping, expected short-term will continue to play tug of war between two or more in price.

Mainstream waste tungsten market remains steady sidelines, despite the weakening of the business mentality, but the price is not strong willingness mostly, of course, no lack of tension in the business part of the funds cheap shipping. Expected in July and August, tungsten City or weaker overall market run, tungsten scrap prices also fell slightly possible.

Tungsten scrap market continues to hold steady on the sidelines. Currently waste tungsten drill mainstream transaction price excluding tax is still concentrated in the 188-190 yuan / kg, domestic waste tungsten blade 169-171 yuan / kg, imported blade 179-181 yuan / kg. 30-40 degrees grinding tungsten scrap material concentrated near the trading price of 1.6 yuan / kWh, 50-70 degrees concentrated in the vicinity of 1.76 yuan / kWh, more than 70 degrees centered around 1.85 yuan / kWh, but the individual businesses that 1.72 yuan / kWh you can receive 80 degrees sources.

Overseas tungsten City steadily. 23 evening MB ferrotungsten Rotterdam quote 41.5-42.5 U.S. dollars / kg tungsten, steady. Paratungstate Europe quoted 360-370 U.S. dollars / metric ton, steady, Hong Kong offer $ 361-370 / t degrees, low, dropping $ 4. As the European market into the summer break season, very weak overseas demand, the overall turnover deserted, expected short-term overseas tungsten City or continue weakening trend.


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New high-speed adjustable tungsten carbide boring tool came up with a University of Technology, who designed and manufactured a new type of high-speed machining to adapt adjustable boring tool. Under normal circumstances, a double-edged effect for rough machining boring tools are good. Currently on the market supply of double-edged sword boring most of its structure is similar: that is equipped with two knife caught in the cutter body, by means of a cylindrical screws to fasten the serrated gripping surfaces. When the centrifugal force generated by the rotation head is received by the screws and the serrated surface of sufficient size, even when the changes of improper tightening, relying pressurized cylindrical surface of the locking screw, the holder purging phenomenon does not occur. But in fine boring, the situation is quite different kind. Larger adjustment range pole fine boring tools, when the ordinary structure, when the speed reaches 10000r/min. Significantly decreased its processing results. Especially in modern machining centers, when speed is greater than 6000r/min be more boring, prone to howling and flutter, affecting the accuracy and surface quality of the hole.

By experiment, it has been found that the imbalance is at the root tip of the above problems. The reason is so unbalance occurs arbor strain, presetting tooling holes out there is a big error in diameter and accuracy. For the amount of overhang of the tool is longer, the surface roughness Rz value to 3 ~ 6μm. To address this problem, responsible for development and testing to design a re-tune the pore size, from the structure of compensation can automatically feed the balance of the new high-speed adjustable tungsten carbide boring tool.

 

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Tungsten market: recent domestic economic environment remains in the doldrums, tungsten downstream demand remained weak, tight liquidity market businesses generally. Tungsten concentrate prices almost bottomed out, buyers bargain Inquiry increased, but traders reluctant to sell, the actual turnover scarce, price is relatively stable, more tungsten scrap some traders stock market, worries about the market outlook began to increase, the proposed recent shipments may be appropriate, tungsten market is expected in summer or difficult to have a big breakthrough.

Recent domestic economic environment remains in the doldrums, tungsten downstream demand remained weak, tight liquidity market businesses generally. Downstream manufacturers and product unmarketable because of funding constraints, while procurement is not active, actively lower prices; Scheelite high cost stock traders, shipping basically are faced with upside risks, so low will ship, and try to purchase low-cost supply of working capital , with low price and reduce risk.

It is understood that, because the market generally facing funding constraints of this problem, so now many products are tungsten cash transactions, especially tungsten ore, non-cash does not ship. Due to the current inquiry was okay, less low-cost supply, resulting in the difference of 55-65 grade tungsten ore pulled a small, 55-grade tungsten concentrate purchase price is 105,000 yuan / ton, 60 more than the price buyers are willing to accept 10.5 -10.6 yuan / ton.


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Researchers in China have taken a major step towards overcoming one of the main hurdles that is hampering the exploitation of carbon nanotubes for many high-tech applications – how to synthesise chirally pure samples.

The chirality of a single walled carbon nanotube (SWNT) is defined by the diameter of the tube and the wrapping angle, or twist (m), expressed as the index (n,m). Slight changes in these parameters can lead to markedly different properties, so being able to produce a single chirality on demand would represent a major step forward. So far, however, this has proved challenging.

Now, researchers led by Yan Li of Peking University have developed a nanocrystalline tungsten-containing alloy catalyst that that produces SWNTs with more than 90% uniform chirality of the form.

Chemical vapour deposition (CVD) methods of producing SWNTs rely on a carbon-containing vapour, such as ethanol, attaching to nanocrystals of a metal-containing catalyst, whose structure largely determines the chirality of the resulting nanotube. Typically these catalysts contain mixtures of metals such as iron, nickel, copper or cobalt.

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Tungsten market: Tungsten City continued weak run, demand continues to slump dragged down by excess supply, tungsten prices steady kicked upstairs, thinly traded, and only a small amount of the transaction are also trading, APT market downturn in overall demand, market inquiry single-less, if there is no long-term acquisition of APT do inventory, market transactions or worse than tungsten concentrate. Sodium tungstate increasingly weak demand, the overall market showed a downturn trend, manufacturers or reduced sodium tungstate run, or suspend production sidelines ahead, manufacturers sluggish sales, is expected this week tungsten City or weak die hard.

This week APT overall market demand is low, the single market exercise less, if there is no long-term acquisition of APT do inventory, market transactions or worse than tungsten concentrate. Currently focused on the trading price of 16.3-16.6 yuan / ton. Expected this summer, APT weak market or mainstream steady run. It is understood that the majority of manufacturers are compressed APT production operations, some manufacturers even run cut edge becomes improved production equipment to meet increasingly stringent environmental requirements.

Downstream market due to lack of pigment started, sodium tungstate increasingly weak demand, the overall market was sluggish trend, manufacturers or reduced sodium tungstate run, or suspend production sidelines ahead, manufacturers sluggish sales, the main supply and old customers long-term cooperation, new orders difficulties.


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Recently, reporters learned that the industry has been focused on the tool grinding equipment round up one company, the latest development and production of LD702CNC automatic CNC tungsten carbide screw-tap grinder tap through Shanghai Tool Works Co., acceptance, well into production operations, becoming China's first Taiwan goods automatic CNC thread grinder Taps, it also marks our automatic CNC tungsten carbide screw-tap grinder gradual integration of world-class technical level, winning glory for the enterprise, winning glory for the people, for the nation proud. 　

It is mainly used in production of the manufacturers tungsten carbide screw-tap thread grinding, high automation, high precision, high efficiency, high intelligence, stability and reliability. Tungsten carbide screw-tap thread achieve full function processing, can be processed straight flute taps, spiral flute taps, taper pipe thread tap and squeeze tap. 　　　

Machine control section uses advanced digital control systems and our self-developed software has good man-machine interface and interactive features, do not need professional CNC program, the use of intelligent reporting operation menu, no special requirements on the operator.

 

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Tungsten is usually used as a target material in x-ray protection for two reasons:

1. Tungsten has a relatively high density, which could protect relatively high energy characteristic x-rays

2. Tungsten has the highest melting point of any metal, and because over 99% of the energy put into the x-ray tube to produce the beam is turned into heat energy, the ability to disparate the heat without loosing structural integrity is critical.
 

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