Modern technology is constantly advancing and people's fields of exploration are expanding and deepening, while the requirements for tools are getting higher and higher, because the environment of human exploration is harsh and harsh, and many tool parts have to work in such an environment, they must have a variety of comprehensive and strong performance. For example, they need to face challenges such as high pressure sealing, acid and alkali corrosion. The high hardness, high density and high melting point of carbide button and good chemical stability give it an absolute advantage, and it has a wider application in mining, oilfield drilling, tunneling and rock excavation.
The strong wear resistance of carbide mining insert is proven by a large number of studies done by domestic scholars. The carbide button were used for grinding experiments on granite. A vertical lathe was chosen as the instrument to test the depth of intrusion of the fixed button, thus testing the wear resistance of the carbide button. Carbide mining inserts have a high hardness, but they are a brittle material and not very tough. The lower the wear per unit of friction work, the greater the wear resistance of the carbide button mining.
It is easy to see from the research experiments that the wear ratio of carbide ball teeth grinding granite is around a thousand, the lower the wear ratio the more it matches the working conditions of the submersible drill button on site. The vast majority of carbide mining insert fail due to wear and tear when working with submersible drill bits, with only a small number failing due to impact fracture. In some high pressure drilling operations, the production process is also more stringent, and if the carbide buttons are worn out and need to be replaced frequently, this can lead to a significant increase in labour and material costs. Researchers have therefore looked at the effects of tungsten carbide (WC) grain size, trace elements, binder and chemical heat treatment on the wear resistance of carbide button. Here we focus on the effect of trace element addition on the wear resistance of carbide button.
In general, the grain size of tungsten carbide carbide teeth is refined by the addition of grain growth inhibitors; the corrosion resistance of carbide carbide teeth is improved by the addition of corrosion resistant components; and the alloy properties are changed by the addition of rare earth elements or high melting point metals. A large number of experiments and statistics have shown that the most effective inhibitors of grain growth in WC-20Co are vanadium carbide and elements such as niobium, tantalum, titanium and zirconium, which help to refine the grains and improve wear resistance. The addition of rare earth elements can occur in a spherical complex compound with impurities such as oxygen O, calcium Ca and sulphur S, i.e. changing the distribution of the original interfacial impurities. In addition the wettability of the cobalt Co elements on the tungsten carbide WC is improved to a certain extent and the strength of the interfacial linkage is increased, thus improving the wear resistance.
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