Nickel Alloy and Cobalt Alloy Electrode (Difference)

The development of China’s aerospace industry indicates that China’s comprehensive national strength has been further improved. From the completion of manned spaceflight to the present, it is inseparable from the efforts of all walks of life. Among them, the alloys widely used in aerospace technology are nickel-based alloys, Cobalt Chrome Alloy and cobalt alloy electrodes can be used, but the “strength mechanism” of the two alloys is different.

The high strength of the nickel-based alloy containing titanium and aluminum is due to the formation of a phase strengthening agent having a composition of NiAl (Ti). When the operating temperature is high, the phase strengthening agent particles are transferred to the solid solution, and the alloy quickly loses strength. The heat resistance of the Cobalt Alloy Plate is due to the formation of refractory carbides, which are not easily converted into solid solutions, and the diffusion activity is small. When the temperature is above 1038 ° C, the superiority of the cobalt alloy is revealed. This is just right for a high-efficiency, high-temperature engine.

Cobalt alloy is a hard alloy that is resistant to all types of wear and corrosion and high temperature oxidation. That is, the so-called cobalt chromium tungsten (molybdenum) alloy or stellite alloy (stellite alloy was invented by American Elwood Hayness in 1907). Cobalt alloys contain cobalt as a main component and contain a considerable amount of nickel, chromium, tungsten and a small amount of alloying elements such as molybdenum, niobium, tantalum, titanium, niobium, and occasionally iron. Depending on the composition of the alloy, they can be made into welding wire. The powder can be used for hard surface surfacing, thermal spraying, spray welding, etc., and can also be used for casting and forging parts and powder metallurgy parts.

The Cobalt Alloy is a general term for an alloy made of one or more of cobalt and chromium, tungsten, iron, and nickel. Tool steel containing a certain amount of cobalt can significantly improve the wear resistance and cutting performance of the steel. Stanley cemented carbide containing more than 50% cobalt does not lose its original hardness even when heated to 1000 ° C. Today, this hard alloy has become an important material for gold-containing cutting tools and aluminum. In this material, cobalt combines the other metal carbide grains in the alloy composition to give the alloy a higher toughness and less impact sensitivity. This alloy is welded to the surface of the part to make the part Life expectancy is increased by 3-7 times.

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