2015年4月29日星期三

Wrought Alloy and Casting Alloy Differences

Wrought Alloy and Casting Alloy Differences
Magnesium alloy come in many forms within two primary categories: wrought alloy and cast alloy. These terms describe the processes by which the magnesium alloy product is created and also alludes to the quality of the metal. Although both types of magnesium alloy are sought after for their lightweight, strength, and performance, there is a great difference between the two.
Magnesium alloy sheets fall into this category of metals. Presses that apply extensive pressure in order to achieve a certain shape are used to cold form wrought alloys. Because they are cold formed from one piece of magnesium, wrought alloy products are considered to be stronger and more tensile than cast alloys. They are also lighter. Wrought alloys are also exposed to fewer opportunities to compromise the metal as cast alloys are.
The magnesium is heated to an extremely high temperature to melt it. The liquid is then poured into a mold. It is allowed to cool before the newly shaped part moves on to assembly. Cast magnesium can take on an infinite number of shapes, as long as a mold is created for the final shape. Strength and weight are qualities that put magnesium alloys over steel, but also the properties that make cast alloys slightly worse than wrought alloys. The wrought alloys also cannot hold an unlimited variety of shapes, as can the cast alloys.
Unfortunately, injection molding has issues because of the heat, compromising the strength. Other issues that plague cast alloys are defects in the mold that cause blemishes, misalignment and more in the finished product. Unskilled alloy pourers can cause air bubbles in the liquid metal that lead to defects in the final product.

Casts, however, were thought of as the best thing in metals until recently. In fact, it was the cast alloys that were first on the market and widely used in manufacturing. Wrought magnesium alloys are joining the rush, but only as an alternative to the steel that forms frames, panels and more.

Any metal that is rolled, pressed, and sheeted is a wrought metal while shaped, solid pieces of the alloy may just be a cast alloy.
Titanium and titanium alloy have excellent use of properties, have been recognized worldwide an excellent materials in bio-medical field, compared with stainless steel, cobalt-based alloys and other metal materials, titanium have larger applicationsand big development.
1)  Aviation industry: Aircraft engine parts and rockets, missiles structure, fuel and oxidizer tank and pressure vessel.
2) Marine areas: Titanium is used to make propeller shafts, rigging and heat exchangers for seawater desalination plants; also used in saltwater aquariums cold water heaters, fishing and diving knife.
3)  petrochemical industry: mainly for various containers, reactors, heat exchangers, distillation columns, pipes, pumps and valves.
4)  Medical: titanium can be used for artificial bones and various appliances.
5)  As an electrode and the power plant condenser and environmental pollution control devices.
Ensuring our customers get the satisfying products,strict test is necessary.
a. Visual inspection to check surface quality,ensuring without flaw,black dot and any other defects.
b. Ultrasonic Flaw Detection making sure there are no defects inside.
c. Chemical Composition Detection making sure all chemical component can satisfy customer's demands
d.Mechanical Features testing making sure all titanium bars have satisfying mechanical features before delivery.

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