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 .


Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:  sales@chinatungsten.com
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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.


Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:  sales@chinatungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

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.

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 .


Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:  sales@chinatungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn