High hardness of the coating layer or layers on the tungsten carbide cutting tools substrate coated tool wear good metal or non-metallic compound film, combined with the matrix of high strength, high toughness and coating of high hardness, high wear of advantage, reducing the friction factor between the cemented tungsten carbide cutting tools and the workpiece, to improve the wear resistance without lowering the toughness of the tool substrate. Therefore, coated tungsten carbide cutting tools with high hardness and excellent wear resistance, extend tool life, this is a revolution in the development of cutting tools.

Currently tungsten carbide cutting tools coating method is still a chemical vapor deposition (CVD) and physical vapor deposition (PVD) based, these two methods more prominent problem is the low bond strength between the coating and the substrate, coating easily peeled off, so that the coating can not be made too thick, and the coating once it is worn, the tool will wear rapidly. In recent years, there have been some new coating method appears as plasma-assisted chemical vapor deposition (PACVD), medium temperature chemical vapor deposition (MTCVD), sol - gel (Sol-Ge1), high-speed oxygen - Gas thermal spraying (HVOF ), vacuum cathodic arc deposition (VCAD) and other methods. The toughness of the cemented tungsten carbide cutting tools substrate by CVD, PVD, HVOF coating methods such as a thin layer of wear-resistant metal compound, allows the strength and toughness of the coating matrix to improve the abrasion resistance of the hard combining overall performance alloy tool.




Tungsten Carbide Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-carbide.com.cn
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
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

Cobalt, nickel binder for powder metallurgy sintered density tungsten alloy, known as high-density alloy, also called heavy alloy. Such alloys can be formed by forging or heat treatment to improve their density and strength. Usually tungsten alloy tensile strength σb> 981MPa, hardness> HRC40.

Thermal conductivity than pure tungsten tungsten alloy small, grainy chip, tool - chip contact length is short, high cutting temperature, prone to tumors and adhesive wear knife. Tungsten alloys require cutting tool material thermal conductivity, high flexural strength and toughness, good red hardness. Recommended use ultra-fine grain tungsten carbide-based fine grain, such as YDl5, YM051 and so on.
       
Tungsten alloy cutting tool requires sharp, but also to ensure the edge strength. Tool geometry parameters can be selected: γO = -8o, αO = 8o, Κr = 75o, rε = 0.5mm. Cutting can be used: νC = 38m / min, f = 0.24mm / r, ap = 1mm. Cutting without cutting fluid.




Tungsten Powder Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-powder.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
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
 

Mainly used in the manufacture of tungsten metal powder like tungsten trioxide or tungsten blue oxide;the downstream products of metallic tungsten powder have tungsten material series, such as tungsten, tungsten and other electric vacuum materials; there are alloy series too, such as tungsten carbide alloy blade, alloy drill, alloy molds, etc.; and other wear, pressure, temperature and other machinery and equipment components.Tungsten oxide can be obtained by calcined tungstic acid or APTCalcined in air (oxidizing atmosphere) to obtain tungsten trioxideCalcined in weak reducing atmosphere can be obtained industrial blue tungsten oxide - a mixture of a lot of WO2.9 and a small amount of WO2.72 with traces of WO3 and WO2.

Tungsten Powder Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-powder.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
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

The spectrophotometric determination of impurities in the ammonium paratungstate, mainly determined by the reaction temperature, reaction time, NaOH concentration and stirring speed on the active ingredients wolframite tungsten leaching. Also investigated the properties of the resin in the ion exchange process, the exchange of the solution before concentration and flow rate, desorbent concentration, flow rate and temperature and other factors on the impurity removal rate during crystallization temperature paratungstate crystals.

Tungsten Powder Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-powder.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
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

:In tungsten hy drometallurgical process , ammonium paratungstate nature affects directly tungsten powder nature , so it is very important to prepare good physical properties ammonium paratungstate .In this article , the relations between ammonium paratungstate physical properties and control conditionsare summarized .The focus of this article is on influencing mechanisms of some factors on ammonium paratungstate physical properties .The factores are crystallizationmethod , temperature , degree of supersaturation of solutio n(WO3 initial concentration , NH4Cl concentration , impurities in solution),pH range , agitation rate , seed crystal , supplements (NH4)2WO3 solution , crystallization period , crystallization end point mother liquor density , surfactant , vacuum degree and so on .

Tungsten Powder Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-powder.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
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

Violet tungsten oxide was prepared with pure ammonium paratungstate in argon gas. Tungsten powder was obtained from violet tungsten oxide through deoxidation in hydrogen gas (rate of purity: 99.99%, dew point: –40 °C), and tungsten powder was oxidized in the air. Tungsten oxide was reduced to tungsten powder in hydrogen gas. The samples were characterized with the laser particle size distribution measuring instrument and the electron probe scan instrument. The results show that submicron tungsten powder can be obtained through circulatory oxidation twice and reduction three times. The percentage of the particle size distribution of submicron spherical tungsten powder is 95.73% between 0.1 μm and 1.0 μm, and its BET is 1.082 m2/g.

Tungsten Powder Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-powder.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
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

There are few tips which is important for long life dartboard.

First, you must remember to rotate your dartboard. While this will only work if your care dartboard has the removable metals ring with the numbers on it, if the numbers are painted on the board, you will not be able to rotate it. Frequently rotating the board will make it last longer.

Then remember that do not spray any types of liquids on a bristle board, which will ruin your dartboard.

Tungsten Alloy Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-alloy.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
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

Paper dartboards are made different from wooden dartboards. Instead of pieces of wood connected together, paper is wound tightly to the dartboard. When a dart hits the board, it sinks into a seam in the paper.

The reason why using a paper dart board is that the darts never take away at the paper the same way they chew up wooden boards in theory. The darts on a paper dartboard will slip between the layers of paper, and if twisted out, they leave no trace, so that the paper dartboard may have longer life compared with wooden dartboard.

Tungsten Alloy Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-alloy.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
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

Wooden dartboards are made from end grain pieces of basswood.

Wooden dartboard comes in two sections, a center section which is a circular area that includes the blue rings, and an outside "frame" area. The center section will rotate, although it usually takes a bit of elbow grease at first.

Since the same innings are often used over and over, wooden dartboard wears unevenly, to prevent that, you can rotate it which will let dartboard get as much life as possible.

Tungsten Alloy Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-alloy.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
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

Triangle dartboard is not refers to the shape of the board, but that the shape of the wire. Many types of dartboards are with circle wires, while triangle dartboard are with triangle shape iron wire, which greatly reduces the risk of darts bounce outs by wire.

Many important champions such as world darts championships adopt the triangle dart board.

Tungsten Alloy Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-alloy.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
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