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Tungsten needle can be produced using tungsten wire with the diameter of 1mm as raw material. The tip of tungsten needle can be processed into needle or spade shape depending on the shape of the broken end of tungsten wire. Besides, the depth of tungsten wire tip immersed in electrolyte can be adjusted at any time to slow down the tip slope, and therefore, it can be processed into cone shape. Tungsten needle with high hardness can be used to…

Ground tungsten rod is a type of tungsten rod, whose surface is ground. The tungsten rod of ground surface has the characteristics of uniform internal structure, fine grain size, good wear resistance, high hardness, high melting point, high density, high temperature resistance, good processing performance, no surface cracks, no burrs and no obvious oxidation phenomenon. Therefore, it can be used to manufacture tungsten wire, tungsten cathode, tungsten anode, tungsten electrode, outgoing line and bracket. Grounding process can be carried out…

Spot welding tungsten rod means the tungsten rod is specifically designed for spot welding. As the electrode of spot welding machine, tungsten rod has the characteristics of good high-temperature strength, excellent creep resistance, nice heat conduction, electrical conductivity and electron emission performance, thereby it can improve the temperature of the welding spot and avoid cold solder joint, and therefore, it improves the welding quality, reduces the defective rate. In the traditional spot welding machine, copper rod is used as the…

Tungsten rod can be sintered tungsten rod or forged tungsten rod, whose surface may be ground. Forging and Annealing Test on Pure tungsten bar Sample Preparation Raw material: Pure tungsten powder with particle size of 2.01μm. The Ф50mm tungsten rods were obtained by isostatic pressing and intermediate frequency sintering. Then, these samples were forged and drawn to obtain the tungsten rods with diameter of 23mm. According to the difference in the average forging ratio, three types of forging processes were…

Forged tungsten bar means the tungsten bar is produced by forging and rolling with refined metal crystal grains. The fiber is continuous as it is pressed repeatedly. This type of tungsten bar can be applied as the tool bit of lathe tool, tungsten wire for lighting equipment and various thermal conductors. “Forging & Rolling” is the combined processing method that uses the forging and rolling machine to put pressure on the metal blank to generate plastic deformation to obtain the…

Sintered tungsten bar may be produced by indirect-heated way to sinter under uniform temperature conditions using medium-frequency induction sintering furnace as an important piece of producing equipment. Compared with vertical sintering method, the quality of tungsten bar prepared by indirect sintering method is improved with excellent energy-saving effect. And this type of tungsten bar can be used for the preparation of tungsten wire. Medium-frequency induction sintering furnace adopts tungsten tube as heating element, and zirconium oxide as insulation material. The…

Tungsten bar has the characteristics of high melting point, high density, low vapor pressure and low thermal expansion properties. It also offers good thermal conductivity, sufficient electrical resistance, and high modulus of elasticity. It can be sintered or swaged. And it is available in thicknesses of 0.1~15mm and size up to 450x1000mm. Forging and Annealing Process of Pure Tungsten Bar The sintered pure tungsten bar was forged by different average forging ratio and forging method, then was annealed with different…

Tungsten tube may be prepared by chemical vapor deposition (CVD). CVD technology is an important method for producing pure tungsten products. In the late 1980s, it has been reported that CVD technology was used to prepared high-density, high-purity tungsten products abroad. In recent years, a large number of researches on the process, microstructure, and properties of CVD tungsten coatings also have been carried out in China. The tungsten tube produced by CVD technology may appear crack. And the cracked tungsten…

Tungsten pin may be prepared by electrolytic process using thin tungsten wire as raw material, which has advantages of high hardness, good rust resistance and strong ductility. And the pin made of tungsten is not easy to break so that it is durable with long service life. What is more, it can be reused after electrolysis if there is wear or tear. Tungsten Pin Prepared by Electrolysis 1. Experimental material: (1) Thin tungsten wire, diameter of 0.32mm, length about 5cm.…