Technology for preparing diamond sandwich type hard alloy mine rock drilling blade
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A cemented carbide and sandwich technology, applied in drilling equipment, earthwork drilling, drill bits, etc., can solve the problems of high impact force and high frequency, achieve high cutting speed, save consumption, and have broad application prospects in the product market
Inactive Publication Date: 2013-10-23
吴庆华 +2
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Unfortunately, in rock drill bit blades, due to the low speed of the drill pipe (linear speed) <10-20 (m / s), most of them can only use semi-water-cooled and semi-air-cooled cooling conditions, and at the same time, the frequency is very high. Therefore, how to introduce diamond particles into rock drilling blades and create a rigid support condition with high load, three-dimensional high strength and high rigidity has been the dream of material workers for many years. fantasy
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Embodiment 1
[0033] Prepare 100 samples of the K42-5 model, 5-hole diamond sandwich type mining rock drilling blade, the alloy grade is Y611C, and no brazing with the steel drill bit is required. It should be done in the following steps.
[0034] 1. Preparation of porous blade blank:
[0035] a. According to the shape and size requirements of the blade actually used, all relevant dimensions are enlarged by 20%, and the molding mold is designed after the enlargement. figure 2 . All dimensions shall be calculated as follows:
[0036] L=1.2×R where: L- mold linear size (including the inner diameter of the small hole);
[0037] R- the actual required size of the blade after sintering;
[0038] 1.2 - Amplification factor.
[0039] Note: The mold design work can be entrusted to professional units.
[0040] b. Mixture preparation:
[0041] Prepare a 15Kg alloy mixture according to the composition requirements of the YG11C alloy grade, first weigh 13.35kg of WC powder with an average parti...
Embodiment 2
[0070] Prepare 100 samples of K42-4 type schematic, 4-hole diamond sandwich type mining rock drilling blade, alloy grade is YG11C, no need to braze with steel drill bit.
[0071] It should be done in the following steps.
[0072] 1. Preparation of porous blade blank:
[0073] The following are basically the same as in Example 1, a; 1, b; 1, c; except that the mixed powder is pressed into four porous blanks with a diameter of Φ2mm and vertically through.
[0074] 2. Vacuum sintering:
[0075] It is basically the same as 2 and 2 in Example 1, except that the inner diameter of the inspection four holes should be (φ1.60~1.66) mm. After passing the test, turn to the filling process.
[0076] 3. Filled with diamond:
[0077] It is basically the same as 3 and 3 in Example 1, the difference is that the 4-hole blade is placed in the filling mold, see the attached image 3 Continuously add diamond powder with the help of a funnel, and continuously punch it with a steel needle until...
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Abstract
With continuous development of national economy, hard alloy mine rock drilling bit blades are used a lot in the industries of railways, highways, mines, coal mines, real estates and the like. Over the sixty years, the drilling rate and anti-abrasion service life of a mine rock drilling bit are always what people expect to improve because the kind of drilling bit blade is usually used in the underground and cave conditions, wherein the underground and the cave conditions are very cold, wet or hot, and ventilation and dust exhausting are very poor. Therefore, obviously, anyone expects that the faster the cutting drilling of the mine rock drilling bit blade is, the better the blade will be, and the longer service life is, the better the blade will be. Unfortunately, over the sixty years, the performance of the drilling bit blade has no big changes. The invention provides a technology for preparing a diamond sandwich type hard alloy mine rock drilling blade. By the adoption of a novel artificial diamond sandwich technology, artificial diamond particles are evenly and deeply embedded into the working section of a common YG11C hard alloy mine blade in a high-pressure and mechanical mode. Moreover, high-temperature brazing is performed for solidifying, and the novel hard alloy mine rock drilling bit blade is prepared and low in cost, very high in drilling rate and very good in anti-abrasion performance. Therefore, working efficiency of the existing mine rock drilling blade is greatly improved. The technology and equipment used for the technology for preparing the diamond sandwich type hard alloy mine rock drilling blade are mature technologies of years. The technology for preparing diamond sandwich type hard alloy mine rock drilling blade is suitable for large-scale production, low in investment, very wide in domestic and foreign markets and suitable for investment and management of small enterprises, medium enterprises and micro enterprises.
Description
technical field [0001] The invention belongs to the technical field of preparation of cemented carbide mining tool alloys in metal materials, and in particular provides a new artificial diamond sandwich technology, in the working section of conventional cemented carbide mining drill blades, uniformly deep high-pressure Artificial diamond particles are mechanically embedded and reinforced by high-temperature brazing to prepare a new type of hard alloy rock drilling blade with excellent drilling speed and wear resistance. This technology is suitable for industrialized large-scale production, easy to popularize and use, and has a very broad market prospect. Background technique [0002] my country is a big producer of cemented carbide, with an annual output of more than 8,000 tons. my country's tungsten ore resources are very rich, ranking first in the world, and the annual consumption of cemented carbide in mining tools exceeds 1,500 tons. With the continuous development of ...
Claims
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