What is the effect of metal coating treatment on Cu-based powder metallurgy friction materials and brake tribology? What role do they play in the machinery industry?
In automobiles, machinery and other fields, brake stability and braking performance are the key. Cu-based powder metallurgy friction materials are more and more widely used in brakes. In order to improve the performance of Cu-based powder metallurgy friction materials in brakes, the method of metal coating treatment on graphite surface is used to modify Cu-based powder metallurgy friction materials, and their brake tribological behavior is tested and analyzed.
Cu-based powder metallurgy friction materials have good wear resistance and can maintain good wear resistance under high temperature and high speed operating conditions. This property makes it often used in the mechanical industry to manufacture highly worn components such as bearings, gears, brakes, etc.
Friction materials have a low coefficient of friction, which can reduce friction loss and heat generation in mechanical equipment, and improve the efficiency and stability of mechanical equipment. Cu-based powder metallurgy friction materials have good corrosion resistance and can also be used in wet or corrosive environments.
This characteristic is very important in the mechanical industry, because some machinery and equipment need to operate in harsh working environments. Cu-based powder metallurgy friction materials have high thermal conductivity and can quickly transfer heat to other components to avoid overheating and damage of mechanical equipment.
However, how to improve Cu-based powder metallurgy friction materials, surface hardness and wear resistance is also very important, adding hard phase particles to Cu-based alloys, such as WC, TiC, SiC, etc., can significantly improve the hardness and wear resistance of the material.
Through the appropriate heat treatment process, the grains in the Cu-based alloy can be refined and the strengthening phase dispersed, thereby improving the hardness and wear resistance of the material.
When designing and selecting friction materials, it is necessary to reasonably select the composition and preparation process of Cu-based friction materials in combination with actual applications to achieve optimal surface hardness and wear resistance.
For Cu-based powder metallurgy friction materials, the surface hardness and wear resistance can be improved by adding reinforced phase, surface covering, heat treatment and material property matching.
After metal coating treatment on the surface of Cu-based powder metallurgy friction material, the metal can improve the surface hardness and wear resistance of the material, reduce the amount of wear, and improve the wear performance of the material.
The surface metal cladding layer can smooth the surface of Cu-based powder metallurgy friction materials, reduce the friction between the contact surfaces, and thus reduce the friction coefficient.
Graphite surface metal coating treatment can improve the thermal conductivity and high temperature resistance of the material, thereby improving the heat transfer performance of the brake, accelerating the cooling speed of the brake, improving the braking performance and stability, the metal coating treatment can form a protective layer, reduce the surface is oxidized and iron corrosion, thereby improving the friction and corrosion resistance of the material.
In the machinery industry, graphite, as a material with superior thermal properties, is often used in harsh working conditions such as high temperature, high pressure, and high speed, and the metal coating on the surface of graphite can improve the thermal conductivity of graphite, which is more stable and reliable in high temperature environments.
Graphite surface metal coating can be graphite surface covered with a layer of metal materials with better chemical stability, improve its stability and corrosion resistance in complex chemical environment, surface metal coating treatment in the mechanical industry is a very important technology, it can significantly improve the thermal properties, electrical properties, mechanical properties and chemical stability of graphite, opening up a broader application field.
Graphite surface metal coating treatment can also speed up brake cooling and improve braking performance and stability by the following aspects: improve thermal conductivity, increase friction coefficient, improve wear resistance, and inhibit oxidation.
The use of metals with high thermal conductivity for cladding, such as copper, aluminum, etc., can improve the thermal conductivity of graphite brake materials, thereby accelerating the cooling rate of brakes.
The metal coating treatment on the graphite surface can effectively improve the friction coefficient of the material, so that the brake can reach the working temperature more quickly and reliably when braking, and improve the braking performance and stability.
The metal cladding layer can form a metal protective layer with good wear resistance properties on the surface of the graphite brake material, thereby protecting the graphite material from factors such as wear and thermal expansion and improving the wear resistance.
The metal cladding can delay the oxidation reaction of the graphite brake material, thereby slowing down the aging rate of the material and improving the service life.
The metal cladding layer uses metals with good oxidation resistance, such as aluminum, magnesium, zinc, etc., which can effectively inhibit the oxidation reaction. The metal cladding layer should evenly cover the entire surface of the graphite brake material to ensure uniform protection against oxygen in each part, thereby delaying the oxidation reaction.
Thickness is also an important factor affecting the inhibition of oxidation reaction, too thick or thin coating effect is not good, appropriate thickness can better play the role of inhibition of oxidation.
Appropriately reduce the use temperature of graphite brake materials, can slow down the speed of oxidation reaction, extend the life of materials, before the use of graphite brake materials, appropriate heat treatment can be carried out to further strengthen the oxidation resistance of materials.
Graphite is also widely used in the machinery industry to manufacture mechanical seals, friction materials and other components, and graphite surface metal coating can improve the surface hardness, wear resistance, pressure resistance and other mechanical properties of graphite, thereby improving its service life and reliability.
It can be seen that the metal coating treatment on the graphite surface has a significant positive effect on the braking tribological behavior of Cu-based powder metallurgy friction materials, which can not only improve the wear resistance of the material, reduce the friction coefficient, but also improve the braking performance and stability, and importantly, improve the corrosion resistance of the material.
