Tungsten-cobalt Alloy Valve Seat PM Sintered Parts
Tungsten-cobalt alloy is expressed in English as WC-Co hard alloy and tungsten-cobalt alloy is also called tungsten carbide-cobalt cemented carbide. A cemented carbide composed of tungsten carbide and metallic cobalt. According to the cobalt content, it can be divided into three types: high cobalt (20% ~ 30%), medium cobalt (10% ~ 15%), and low cobalt (3% ~ 8%); according to its WC grain size, it can be divided into microcrystalline There are four types of alloys: grain, fine grain, medium grain, and coarse grain; according to their use, they can be divided into three categories: tungsten cutting tools, mining tools, and wear-resistant tools.
Product Introduction
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Tungsten-cobalt alloy valve seat PM sintered parts |
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Item |
Material |
Production Process |
Sintering Temperature |
Mold |
Custom |
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Tungsten-cobalt alloy valve seat powder metallurgy |
Carbide |
Powder metallurgy pressing |
1680℃ |
To be customized |
Yes |
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Available Materials |
Low carbon stainless steel, titanium alloy (Ti, TC4), copper alloy, tungsten alloy, hard alloy, high temperature alloy (718, 713) |
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Smoothness |
Dimensional accuracy |
Product density |
Appearance treatment |
Appropriate weight |
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Roughness 1～5μm |
(±0.1%～±0.5%) |
7.3-7.6g/CM³ |
According to customer requirements |
0.03g～400g) |
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Tungsten-cobalt alloy is expressed in English as WC-Co hard alloy and tungsten-cobalt alloy is also called tungsten carbide-cobalt cemented carbide. A cemented carbide composed of tungsten carbide and metallic cobalt. According to the cobalt content, it can be divided into three types: high cobalt (20% ~ 30%), medium cobalt (10% ~ 15%), and low cobalt (3% ~ 8%); according to its WC grain size, it can be divided into microcrystalline There are four types of alloys: grain, fine grain, medium grain, and coarse grain; according to their use, they can be divided into three categories: tungsten cutting tools, mining tools, and wear-resistant tools.
The performance of tungsten-cobalt alloy is related to alloy composition, structure, and manufacturing process. Among the most important factors are: the composition and content of the bonding metal. Tungsten-cobalt alloy is a high-hardness, refractory metal compound powder, which is compacted and sintered with metals such as cobalt or nickel as a binder. The carbides in it are harder and more resistant to high temperatures. In industry, high-speed steel-cutting tools are difficult to cut high-hardness materials, such as hardened steel or materials with higher hardness. High-speed steel tools cut general ferrous metals. Due to the limitation of heat resistance, their cutting speed and production efficiency are still at a low level. Therefore, the advent of tungsten-cobalt alloy cutting tool materials has brought a leap in cutting production efficiency.
Because of its high bending strength, compressive strength, impact toughness, elastic modulus, and small thermal expansion coefficient, the tungsten-cobalt alloy is the largest and most widely used type of cemented carbide. Generally, the flexural strength and fracture toughness of tungsten-cobalt alloys increase with the increase of cobalt content, while the hardness decreases. The appearance of the tungsten-cobalt alloy coating is close to that of the chromium coating, and the dispersion and coverage of the plating solution are good. Through testing, the influence of sodium tungstate, cobalt sulfate, additives, current density, and pH value on the tungsten content and performance of the coating, it is found that tungsten-cobalt alloy has good corrosion resistance, heat resistance, and wear resistance, Tungsten-cobalt alloy valve seat PM sintered parts can be used as tools to process cast iron, non-ferrous metals, non-metals, heat-resistant alloys, titanium alloys,1 and stainless steel, etc., and can also be used as extension dies, wear-resistant parts, stamping dies and drills.
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