Classification of copper alloys
There are three ways to classify copper alloys: according to the alloy system, it can be divided into non-alloy copper and alloy copper. Non-alloy copper includes high-purity copper, tough copper, deoxidized copper, oxygen-free copper, etc. Traditionally, people call non-alloy copper red copper or pure copper, also known as red copper, while other copper alloys belong to alloy copper. In China, alloy copper is divided into brass, bronze and white copper, and then divided into small alloy systems in large categories.
2022/12/22
Properties of composite materials
Fiber reinforced materials are widely used and used in composites. It is characterized by small specific gravity, large specific strength and specific modulus. For example, the composite material of carbon fiber and epoxy resin has a specific strength and specific modulus several times larger than that of steel and aluminum alloy, and also has excellent chemical stability, antifriction and anti-wear, self-lubrication, heat resistance, fatigue resistance, creep resistance, noise elimination, electrical insulation and other properties.
2022/12/22
Specific practice of aluminum steel
The specific method of aluminum steel is to immerse the steel parts in the molten aluminum bath, which is simple and easy for continuous operation. However, because the melting point of aluminum is as high as 660 ℃, the steel parts to be aluminized need to be pretreated and activated, and the oxidation of aluminum should be prevented. The surface of steel plate, steel strip and wire can be aluminized, and the thickness of aluminized layer can reach 0.05mm. Generally, the heat-resistant temperature of aluminized steel can reach 700 ℃, and its thermal reflection performance is also very good, which can reflect about 75% of the radiant heat. Aluminum steel can be used in muffle furnace, local heating device, heating furnace, etc.
2022/12/22
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