Polycrystalline diamond-hard alloy composite rock breaking button down-the-hole bit and manufacturing process thereof

Abstract

The invention discloses a polycrystalline diamond-hard alloy composite rock breaking button down-the-hole bit and a manufacturing process thereof. The bit comprises a hard alloy button main body (1), and at least one polycrystalline diamond is arranged in the hard alloy button main body (1). The polycrystalline diamond is a polycrystalline diamond short cylinder (2) which is arranged in a hole of the hard alloy button main body (1); and the polycrystalline diamond short cylinder (2) has the length and diameter dimension of 1-50mm*phi 1-30mm. The manufacturing process comprises the following steps of: obtaining a down-the-hole bit steel body in needed dimension through a machining mode; fixing the hard alloy button main body of the polycrystalline diamond-hard alloy composite button in the hole of the down-the-hole bit steel body; and fixing the composite button of the down-the-hole bit steel body, performing post-treatment, inspecting the quality, packaging and discharging. Therefore, the manufactured polycrystalline diamond-hard alloy composite button down-the-hole bit has high capacity of impacting and breaking rocks.

Description

technical field [0001] The invention relates to a rock crushing button, in particular to a polycrystalline diamond-tungsten carbide composite rock crushing button with strong impact resistance and high wear resistance. Background technique [0002] Tungsten carbide button down-the-hole drill bit is an existing rock-breaking material. Compared with other down-the-hole drill bits made of metal materials, it has certain impact resistance and higher hardness. It is widely used as an industrial tooth for impacting and breaking rocks. [0003] Various down-the-hole drills are made of cemented carbide buttons embedded in metal steel bodies. When impacting and crushing soft rocks, they show high efficiency and long life, which can meet the requirements of rock crushing in engineering construction. When encountering rocks with high hardness, although the cemented carbide button also has a relatively high hardness, the cemented carbide button still wears quickly, which is characteriz...

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Problems solved by technology

[0003] Various down-the-hole drills are made of cemented carbide buttons embedded in metal steel bodies. When impacting and crushing soft rocks, they show high efficiency and long life, which can meet the requirements of rock crushing in engineering construction. When encountering rocks with high hardness, although the cemented carbide button also has a relatively high hardness, the cemented carbide button still wears quickly, which is characterized by short life and low efficiency, so that the cemented carbide button bit is seriously damaged. It affects the effect of rock breaking. In many hard formations such as granite, the life of impact rock breaking drill bits made of cemented carbide buttons is less than 10 meters. This not only affects the construction progress of the project, but also causes a lot of material damage. Consumption, and the main raw materials for the production of cemented carbide buttons are tungsten carbide, cobalt, nickel, etc. These are non-renewable natural resources, and the extremely short service life of cemented carbide button down-the-hole drills has brought huge waste of resources. Therefore, it is necessary to find and invent a new type of composite button down-the-hole drill bit that can improve impact and broken rock, so as to improve the disadvantages of short life and low efficiency of cemented carbide button down-the-hole drill bit for rock breaking.

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