In the past, it was believed that drilling must be carried out at lower feed rate and cutting speed , this view in the use of ordinary drill processing conditions were right . Now, with the emergence of carbide drill bits , drilling concept has also changed. In fact, by the correct selection of a suitable carbide drill bits , drilling can greatly improve productivity, reduce processing costs per hole .

The basic types to choose from carbide drill carbide drill is divided into four basic types : solid carbide drills , carbide indexable insert drills , welding and replaceable carbide carbide drills crown drill . Each drill has the advantage for a particular processing conditions .

Solid carbide drills Solid carbide drills are suitable for use in advanced machining center. Such drills manufactured using fine particles of carbide materials , in order to extend the service life , but also for the coating, blade -type geometry designed with self -centering drill bit , good chips in drilling most workpiece materials control and chip performance. The self-centering function and manufacturing precision drill strict quality control to ensure that the hole drilling , drilling without further follow-up after finishing .

Welded carbide drill welded carbide drill steel drill body in solid carbide weld a crown made ​​. This self-centering drill bit using geometric edge -type , small cutting force , for most workpiece materials can achieve good chip control , processing of the hole surface finish, dimensional accuracy and positioning accuracy are high, do not have to follow-up fine processing. The drill using the cooling method can be used in machining centers , CNC lathes or other high rigidity, high speed machine .


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Tungsten market : tungsten concentrate market remains in the doldrums , the market waiting to see atmosphere more intense , more concentrated near the cost price , production businesses are profitable , said the current low price , shipping negative , so the procurement activity , but the turnover continued stalemate, tungsten scrap stock market more, but not many on the spot distribution market , mainly because of low holding cargo ship will not high , currently holding more choice of goods on the sidelines. Transaction is expected before May plight die hard.

Molybdenum market : With the market rally signals gradually subsided , the venue there is a greater difference in the business mentality , increasing bearish outlook , participants shipped cash conscious. Inadequate venue favorable factors, the lack of support for the market momentum . Molybdenum concentrate , molybdenum iron products traded at a slower pace , participants raise the degree of operating cautiously . Many businesses put high expectations, coupled with the level of boost steel trick little difficult optimistic outlook . Expected short-term molybdenum market or weak to run.

Currently scrap tungsten stock market more, but not many on the spot distribution market , mainly because of low holding cargo ship will not high , currently holding more choice of goods on the sidelines. Market traded mostly small quantities of cash transactions , the lack of short-term demand is expected to support the price of tungsten scrap hard up, or continue to stabilize .

According to research to understand today, mainstream tungsten scrap prices little changed compared with last week . The distribution market : waste tungsten drill traded 186 yuan in cash / kg , and the volume is several hundred kilograms , was minimal ; waste imported tungsten blade 177 yuan / kg , needs and procurement are too few ; domestic waste tungsten blade 169 yuan / kg, the price is relatively strong, direct manufacturers to sell at a predetermined price higher . Manufacturers final purchase price than the market price is generally about distributing high 2 yuan / kg.


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Zhengzhou Comprehensive The scientists have found a new type of tungsten ore in the rock and mineral identification process. The study determined that the ore containing rare earths, tungsten ore elements in the form of ion adsorption occurs in the main carrier mineral containing barium psilomelane .

After identification, the ore grade of the total rare earth oxide 0.23%, W and rare earth elements are enriched in barium-containing Eu psilomelane , and the uniform distribution. Which , Eu2O3 content of between 0.34% ~ 0.47%, W2O3 content of between 3.2% to 4.2 %.

Deposit of rare earth industry mainly endogenous Bastnaesite and monazite ores , exogenous ion adsorption type ( weathering crust ) and sedimentary placer ( monazite type ) ore. Zhengzhou integrated with the newly discovered rare earth tungsten ore mainly occurs in sandstone fracture zone in the case of table generation due to the detailed causes of further study. The researchers said the mine 's ore-forming elements specific combinations and unique mode of occurrence was first discovered in the country is worthy of further study.

According to the Principal revealed that this type of tungsten ore reserves larger prospecting better. The discovery , for improving the utilization of the value of the tungsten ore is significant. This is a major contribution to the Mineral Exploration Zhengzhou comprehensive appraisal made ​​by the rock .


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Today, the mainstream price of tungsten concentrate temporarily stabilized, but buyers continue to lower prices , currently above 60 degrees tungsten ore market has now low Inquiry 1.4 yuan / kWh , the price is more concentrated near the cost of production businesses have said the current price earnings is very low, negative shipments , leading market purchases although active, but turnover continued stalemate between old customers only small quantities traded, not the old customers to buy them arrive.

Ukrainian analysts believe that despite the war, the country to stimulate domestic demand and so favorable macro tungsten market , but continued to support the lack of real demand , turnover is expected before May plight die hard , short-term weakness in the price of tungsten , or watching the market sentiment will continue strong.


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Tungsten concentrate market remains in the doldrums , the market waiting to see atmosphere more intense , more concentrated near the cost price , manufacturing businesses have indicated that the current price of profit is very low, shipments negative , so the procurement activity , but the turnover continued stalemate is expected before May turnover dilemma die hard.

Macro level, one -quarter industrial profits up by 10.1% in March and medium-sized steel enterprises losses ; many ministries started verifiable elimination of backward production capacity , thorough investigation of illegal enterprises for many years ; this year's national urban rail investment will reach 220 billion .


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Tungsten is extremely scarce and irreplaceable strategic resource , but also the national economy and national defense irreplaceable foundation of modern materials and strategic resources , manufacturing tungsten carbide known as "dental industry ," Carbide is widely used in military , areas of aerospace, mechanical processing , metallurgy, oil drilling , mining tools, electronic communications, construction , etc., is the key material tungsten lighting , electronics and other industries. In these applications, has not yet found a direct substitute for tungsten.

Currently, only the world's total proven reserves of tungsten 2.898 million tons , is extremely scarce resources , more than 20 kinds of the world's known tungsten minerals , industrial value only scheelite and wolframite are two, are of high quality wolframite tungsten ore, scheelite are refractory ores . China 's tungsten resources abundant , accounting for nearly 70% of the world 's proven reserves of tungsten mineral resources , ranking first in the world .

2010-2013 , equivalent to the amount of tungsten concentrate production increased year by year , and reached its highest level in 2013 , tungsten concentrate production was 138,000 tons .

Through the analysis of primary tungsten and "Twelfth Five Year Plan" according to the analysis of waste tungsten tungsten industry, we assume that the future of native producers of tungsten in tungsten concentrate production quota increase of 1% per year , the 2017 Chinese tungsten concentrate equivalent to the amount of production will reach 143,600 tons .

Chinese tungsten ore market research report analyzes mentioned in 2014-2017 , has been the domestic and international market demand for tungsten basically showing steady growth in the state . Although the impact of the financial crisis is not over , the European sovereign debt crisis is still spreading and so the constraint of global economic development, but the trend of global economic growth will continue, tungsten demand will continue to grow in 2015 , total global demand may up to 83000t, with an average annual growth rate of 4%.


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April 25, 2014 tungsten reference price of all varieties :

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W-Cu composite material is a high melting point , high conductivity and high density of tungsten and a low coefficient of expansion , high thermal conductivity copper composition , both the advantages of both can , having high thermal conductivity properties such as low expansion coefficient , good high temperature strength and arc erosion resistant properties. As early as in the 1930s , tungsten -copper composite material due to its good compressive strength and resistance to electrical ablation performance, high-voltage electrical switches and other industrial sectors has been widely applied . Into the sixties, tungsten -copper composite material gradually gained in the field of resistance welding electrodes , aerospace and high-temperature parts. Since then, with gradually improved preparation technology , electronic packaging and in the nineties as a heat sink material began in the field of LSI and high-power electronic devices such as access to a wide range of applications . Into the 21st century, tungsten -copper composite material is used as cover material HEAT medicine , materials and target missile nozzle caused concern in the military and high-tech fields .

Now , tungsten -copper composite material due to its good electrical conductivity , thermal conductivity and excellent thermal stability , has become a high-power microwave devices and ultra large scale integrated circuit substrates , embedded blocks , essential key material connections and cooling components , etc. its high thermal conductivity , high thermal stability and good formability near net sizes , can improve the use of power microelectronic devices , is conducive to miniaturization of devices and sophisticated development. Low thermal expansion coefficient and the thermal expansion coefficient of tungsten-copper composite material adjustability , enabling connection to match its semiconductor materials and microelectronic devices with silicon , gallium arsenide and other useful ceramic materials , to avoid thermal fatigue damage caused by thermal stress broaden the tungsten -copper composite material in the field of microelectronics applications.

Tungsten -copper composite material due to its high electrical conductivity, thermal conductivity, excellent arc resistance , anti-friction and thermal stability , have already obtained important applications in rail guns , rockets and missile nozzle throat rudder and other high-temperature gas fields . In recent years , tungsten -copper composite material is gradually being used as cover material HEAT drug , its high density , high sound speed and good mechanical properties , help to improve HEAT Sunder power. Europe and other developed countries, studies show that, compared with the pure copper HEAT drug cover , tungsten -copper composite material cover the drug in the triple bombing high caliber of conditions, the armor depth can be increased by 30 %. With the continuous development of high-performance tungsten-copper composite materials preparation technology and applied research , and applications in the military industry will be more broad.

Tungsten-copper composite powder metallurgy materials is an important one of the widely used method for preparing a " Infiltration law ." The method is a mixture of tungsten powder, tungsten powder and a small amount of copper powder or pressed into the blank , by the pre- firing temperature for preparing a porous tungsten skeleton, and then the molten metallic copper and a capillary force to flow along the gap gradually tungsten particles fill skeleton obtained tungsten -copper composite material. Preparation of material dissolved infiltration with high density, good sintering properties , electrical conductivity, thermal conductivity , etc. ideal .

Due to the large gap between the melting point of tungsten and copper and immiscible , were prepared by powder metallurgy method of tungsten-copper composite material is often not high density , usually resulting in a conductive material , inadequate thermal and mechanical properties. In order to continue to meet the new requirements proposed industrial development , preparation techniques tungsten-copper composite task facing major reforms . In recent years , highly dispersed , the rapid development of nano- powder preparation techniques , new pressing and sintering technology , the performance of tungsten-copper composite gained further improved, effective broaden its application in high-tech fields.


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Tungsten market : the market with ample supply of raw materials and scrap tungsten inquiry there , but the turnover has continued to light , tungsten, iron market demand is low, the downstream business procurement initiative is low, less market inquiry , coupled with the raw material of tungsten concentrate market downward , tungsten iron spot transactions also showed a stalemate , and the market is slightly weaker . Mainly because of the buyer to take advantage of weaker market outlook and weighed on prices ; seller tungsten market is still holding on long-term expectations and will ship is not strong. Both sides continued stalemate on the issue price , in the absence of external force , expected short-term dilemma is difficult to break the stalemate .

Molybdenum market : External molybdenum prices fell slightly , but the business mentality better, post-market is still strong side . Molybdenum domestic goods market continued to maintain silence, less early trading atmosphere . Foreign businesses not cheap , price stability, hold stocks wait and see. Admission is about to move steel , molybdenum market or expected short-term maintenance of stability persist run .