Cemented carbide teeth are made of cemented carbide ball teeth brazed to alloy structural steel and are generally used in coal mining machines to cut and extract coal directly, so they are also called cemented carbide coal cut-off teeth.
China's coal resources are abundant, so in the process of industrial mining, the performance of carbide teeth is also put forward higher requirements.
In the process of coal mining, the mechanized operation is scientific and efficient, but the existence of layers of coal with large differences also brings a lot of difficulties to the mining work. In our mining production process, the wear and tear of mining machinery carbide, but also for the work efficiency has a greater impact. As a tool for cutting coal on the drum of mining machinery, carbide cutter has good strength, wear resistance and toughness, but wear is inevitable under high intensity work. How to optimize the carbide teeth?
Generally speaking, we can improve the performance of carbide teeth by adjusting the particle size, composition and ratio of the alloy for the failure form and its causes. First of all, the Co content should not be too low, because it can effectively improve the thermal fatigue resistance, enhance the plasticity of the alloy, relaxation stress, etc.. However, the increase of Co content will affect the wear resistance to a certain extent. According to the hardness of coal seam, it is generally controlled between 8%-13%, and the Co content increases appropriately when the texture is hard. Next is the choice of WC particle size and the ratio, the total surface area of fine-grained WC particles decreases, the specific surface area increases, and its average free range of Co is improved, which is equivalent to the brief increase in Co content, and is conducive to the improvement of alloy fracture toughness. In order to strengthen the Co phase, the use of appropriate heat treatment process is also a relatively effective way to use the polymorphic transformation of Co to produce other phases to enhance the face-centered cubic cobalt, so as to achieve the purpose of toughening carbide teeth.
The tooth body of cemented carbide road construction gears is made of heat-treated high-strength alloy steel, which can maintain high toughness and high wear resistance; all the gear clamping springs are made of high-strength spring steel, and the gear clamping springs have excellent wear resistance. The head of coal cut-off gear adopts isothermal quenching process, and the hardness is not reduced. The carbide adopts YG13C produced by domestic regular big factory, with stable quality. Wear-resistant layer can be added according to customer's need. The hardness of the carbide teeth reaches 65 degrees or more.
The advantages of cemented carbide road construction cut-off teeth are
1. Long service life, 1-1.5 times of traditional coal carbide teeth.
2. High working efficiency: 2.5 times of the old coal cutoffs.
3. Good energy-saving efficiency: the number of replacement of cut-off teeth drops significantly, which shortens the downtime of coal mining machine and reduces the cost of mining.
Quality standard of carbide teeth output.
1. Hardness of cone part: HRC＞65.
2. Rod hardness: HRC28°-32°.
3. Surface hardness: HV＞2000; special heat treatment process is adopted for cut-off teeth, which reaches 40-45 degrees and the surface of cut-off teeth is basically oxidation-free.
Knife-type cut-off teeth: cut-off teeth are one of the important parts of coal mining machine, which is a tool for breaking coal directly, and its merits and demerits directly affect the effect of breaking coal. The heat treatment process is adopted, and the quenching concentration is strictly controlled, so that the hardening layer concentration of cut-off teeth is thickened, and the wear resistance and impact resistance are greatly enhanced.
Coal mining machine cut-off teeth: cut-off teeth models: U82, U84, U85, U92, U94, U95, S100, S120, S135, S150, S160, S170, U62, U47, etc.
Roadheader cut-off teeth: The main models of roadheader cut-off teeth are: U47, 135, S150, S160, S200, DRT47, DRT135, DRT7038, etc.
Carbide teeth seat: We produce various types of hijacking parts for rock and coal interceptors to adapt to different working conditions and improve the utilization rate and cutting efficiency of interceptors.
Carbide teeth - the best partner of roadheader header
Whether road excavation or tunneling in the mountain, the roadheader works on hard rock and cement concrete, which makes the cut-off teeth of roadheader consume quickly.
The cut-off gears produced by Hunan Jetvision are developed and customized by our technicians. Both the hardness of the alloy head and the welding of the cut-off gears are technically mature. Moreover, in terms of the wear resistance of the cut-off teeth, the head and shank are treated separately during the production process, with the head part having high hardness and the shank part having high toughness, which ensures the wear resistance and toughness of the cut-off teeth at the same time.
Hunan Jetvision Industrial Co.Ltd offer kinds of tungsten carbide products for mining, such as carbide button, carbide teeth, carbide insert for mining, carbide coal button, carbide PDC substrate, etc. With top quality and low factory price.
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