2015年6月1日星期一

How much do You Know about a W-Mo Alloy?



As we all know an alloy is a substance mixed by two or more than two kinds of chemical substances (at least one component is a metal) with metal characteristics, generally a homogeneous liquid fused by individual components, and obtained through condensation again. We can often see Tungsten Products and Molybdenum Products such as Molybdenum Rod, Molybdenum Bar, Molybdenum Sheet, Molybdenum PlateMolybdenum RingMolybdenum Electrode. But do you know what a W-Mo alloy is?

Molybdenum Tungsten alloy (W-Mo alloy) is composed of tungsten and molybdenum. The content of Tungsten in the commonly used W-Mo alloy is between 30% ~ 50% (quality).

Then you may wonder by which method W-Mo alloy is obtained. Actually it’s quite simple. The method for producing tungsten molybdenum alloy is the same as that of producing metal molybdenum and molybdenum alloy, namely, there are two kinds of methods: powder metallurgy sintering processing and smelting processing, which can produce rods, plates, wires or other profiles.

Here comes how it’s used in modern industry. Tungsten and molybdenum alloy containing Tungsten 30% (mass) has excellent corrosion resistance to liquid zinc, used to make a churn in zinc smelting industry, pipeline, container liner and other components. Tungsten molybdenum alloy due to the good high temperature strength, performance being similar with that of tungsten and proportion being smaller than that of tungsten, so it can be used as the high temperature components, electronic tube filament, parts and other high temperature material among rockets and missiles under the corresponding high temperature conditions.

Molybdenum and metal alloy in manufacturing the arms, in the top field of rocket and missile etc., has an important position. In addition, the tungsten filament is used to make the filament of a lamp, heating element in a high temperature furnace. The metal Molybdenum is easily processed into wire, brand, sheet, rod, etc., and has a wide application in the electronic industry. Molybdenum wire is used as small hooks supporting heating filament is an electric bulb, electronic tube grid, etc. Molybdenum and Molybdenum Boat are used for vacuum plating.

There is no doubt that we owe the use of W-Mo alloy to its special nature. The two elements: Tungsten and Molybdenum are at the same column in the periodic table of the elements. They also show the same properties. The average concentration of two elements in the earth's crust is 1.5 ppm. Molybdenum is a kind of essential nutrients for plants and animals. At high concentrations, molybdenum can cause poisoning, which is sometimes from the cases of alkaline ash leachate. Tungsten is an important strategic metal, which is used for a variety of industrial applications. It is usually mined from scheelite, CaWO4 powder, WO4 optical channel wolframite (Fe, Mn). Tungsten is released into the environment, for example through the use of its winter tires and ammunition we can look on the whole, the environmental behavior of tungsten is not known.

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