Characteristics and functions of tungsten electrode
Tungsten is very suitable for TIG welding and other similar electrode materials for its characteristics. Adding rare earth oxides into tungsten to stimulate the electron work function of tungsten, so that the welding performance of tungsten electrode will get developed: The arc starting performance of electrode is better, the stability of arc column is higher, and the burn out rate of electrode is smaller. Usually the rare earth additives have cerium oxide, lanthanum oxide, zirconium oxide, yttrium oxide and thorium oxide etc.
Tungsten electrode is made of materials with high melting point, corrosion resistance, and high density, good thermal and electrical conductivity. Tungsten electrodes are widely used in welding. After grinding or polishing, the final colors of tungsten electrode are different, and you can tell the difference. More importantly, the difference of final color indicates that the tungsten content is different in tungsten electrode. When welding, the right tungsten electrode can make the welding more easily; What's more, it is important to obtain the high quality welding. Some important factors must considered if you want to make the right choice , and the factors are the power (inverter or transformer), welding materials (steel, aluminum or stainless steel) and the type of material thickness.
Tungsten has high melting point (3683 - 20℃), strong electron emission ability, high elastic modulus, and low vapor pressure, so it has been used as a thermal electron emission material very early. The emission efficiency of pure metal tungsten is very low, and in the high temperature, the recrystallization will form the equiaxed grain organization and make the tungsten wire droop and fracture. To overcome the above disadvantages, and adapt to the development of the modern industry new technology and new processing, the material scientists f all countries are committed to the research and development of various new electrode materials.
Rare earth oxide doped with some low electronic work function can not only improve the recrystallization temperature of tungsten, but also can activate the electron emission. Rare earth metal oxide has excellent thermal electron emission ability, and the electrode material of rare earth has been the development direction of replacing the traditional radioactive thorium tungsten electrode materials. This paper introduces the fabrication and research results of some rare-earth tungsten electrode material, and the related applications of electrode material, and the wide application prospects of tungsten electrode, which provide the reference for the research and application of rare earth tungsten electrode materials in china.
Tungsten electrodes play a very important role in he arc, stability of arc and the welding quality in the electrode TIG welding. The tungsten electrode has the quality loss under the effect of high temperature of arc; this is called the ablation of tungsten electrode. In order to help to discuss the ablation mechanism of tungsten electrode, the ablation can be divided into add oxide ablation and tungsten itself ablation.
Tungsten electrode is made of materials with high melting point, corrosion resistance, and high density, good thermal and electrical conductivity. Tungsten electrodes are widely used in welding. After grinding or polishing, the final colors of tungsten electrode are different, and you can tell the difference. More importantly, the difference of final color indicates that the tungsten content is different in tungsten electrode. When welding, the right tungsten electrode can make the welding more easily; What's more, it is important to obtain the high quality welding. Some important factors must considered if you want to make the right choice , and the factors are the power (inverter or transformer), welding materials (steel, aluminum or stainless steel) and the type of material thickness.
Tungsten has high melting point (3683 - 20℃), strong electron emission ability, high elastic modulus, and low vapor pressure, so it has been used as a thermal electron emission material very early. The emission efficiency of pure metal tungsten is very low, and in the high temperature, the recrystallization will form the equiaxed grain organization and make the tungsten wire droop and fracture. To overcome the above disadvantages, and adapt to the development of the modern industry new technology and new processing, the material scientists f all countries are committed to the research and development of various new electrode materials.
Rare earth oxide doped with some low electronic work function can not only improve the recrystallization temperature of tungsten, but also can activate the electron emission. Rare earth metal oxide has excellent thermal electron emission ability, and the electrode material of rare earth has been the development direction of replacing the traditional radioactive thorium tungsten electrode materials. This paper introduces the fabrication and research results of some rare-earth tungsten electrode material, and the related applications of electrode material, and the wide application prospects of tungsten electrode, which provide the reference for the research and application of rare earth tungsten electrode materials in china.
Tungsten electrodes play a very important role in he arc, stability of arc and the welding quality in the electrode TIG welding. The tungsten electrode has the quality loss under the effect of high temperature of arc; this is called the ablation of tungsten electrode. In order to help to discuss the ablation mechanism of tungsten electrode, the ablation can be divided into add oxide ablation and tungsten itself ablation.
