Metal-coated cubic boron nitride abrasive grain, production method thereof, and resin bonded grinding wheel

A technology of cubic boron nitride and a manufacturing method, which is applied in the direction of chemical instruments and methods, manufacturing tools, metal processing equipment, etc., can solve the problems of increased manufacturing cost, weakened holding force, complicated coating means or process, etc., and the method is simple , reduce manufacturing costs, and achieve the effect of grinding processing costs

Active Publication Date: 2006-01-18
SHOWA DENKO KK
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, the following problems still exist: the holding force between the metal-coated abrasive grains and the resin bond is improved by these metal coatings, but on the other hand, the holding force between the metal coating and the abrasive grains is relatively weakened, due to the residual metal coating layer The proportion of abrasive grains f

Method used

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  • Metal-coated cubic boron nitride abrasive grain, production method thereof, and resin bonded grinding wheel
  • Metal-coated cubic boron nitride abrasive grain, production method thereof, and resin bonded grinding wheel
  • Metal-coated cubic boron nitride abrasive grain, production method thereof, and resin bonded grinding wheel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0104] Showa Denko Co., Ltd. Cubic Boron Nitride Abrasive SBN-B was tested in the air under the conditions of heating rate and cooling rate of 15°C / min, room temperature to maximum temperature of 1050°C, and maximum temperature holding time of 1 hour. (TM) (Nominal particle size 100 / 120) for heat treatment. The heat-treated abrasive grains were recovered, dipped in dilute hydrochloric acid for 1 hour, deacidified, and dried. Grooves were observed on the surface of the treated abrasive grains. exist Figure 6An example of a SEM image is shown in . Fifty grains were randomly selected from the processed abrasive grains, and embedded in resin so that any one of the crystal planes was exposed from the surface. SEM observations were carried out on the planes appearing on the surface and the cross-sections of abrasive grains polished with diamond slurry and approximately perpendicular to the surface. As a result, grooves were observed on all the abrasive grains (50 grains), and i...

Embodiment 2～12、 comparative example 3～35

[0115] Using the abrasive grains shown in Table 3, metal coating was performed at the ratio shown in Table 3. In addition, the symbols of the metal coatings in Table 3 are respectively, Ni means electrolytic nickel coating, Ni / P means electroless nickel coating, Co means electrolytic cobalt coating, Co / P means electroless cobalt coating, and Ti means titanium coating. In addition, the numbers in parentheses after the symbol of the metal coating indicate the volume ratio occupied by the metal coating layer when the volume of the entire cubic boron nitride abrasive grains including the metal coating layer is taken as 100%. The metal-coated cubic boron nitride abrasive grains of Examples 2 to 12 were embedded in resin, ground with diamond slurry, and the cross-section of the abrasive grains was observed by SEM. Taking the state where the metal coating penetrates into the grooves formed on the surface of cubic boron nitride abrasive grains as a representative example, in Figure ...

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Abstract

Cubic boron nitride abrasive grains which have been provided, on the surface thereof, with grooves having a ratio (w/d) of a width (w) to a depth (d) of less than 1 and a ratio (w/L) of a width (w) to a longth (L) of less than 0.1, and then coated with a metal. The cubic boron nitride abrasive grains exhibit an improved holding power (binding strength) between the metal coating film and the cubic boron nitride abrasive grain, and thus can be used for producing a resin-bonded grindstone which exhibits the combination of a high grinding ratio (long life) and a low grinding power value (good cutting quality).

Description

technical field [0001] The present invention relates to metal-coated cubic boron nitride abrasive grains, and more specifically, to cubic boron nitride abrasive grains with improved bonding strength between cubic boron nitride abrasive grains and a metal coating layer, a method for producing the same, and use thereof. A resin-bonded grinding wheel with metal-coated cubic boron nitride abrasive grains. Background technique [0002] Since cubic boron nitride (cubic boron nitride, sometimes abbreviated as cBN) abrasive grains have the hardness second only to diamond, especially for iron-based materials to be ground, the chemical stability is better than diamond, so it is used in grinding wheels and sandpaper, etc. Used as grinding grains. Cubic boron nitride abrasive grains are obtained by treating hexagonal boron nitride ( Hexagonal boron nitride, sometimes abbreviated as hBN). [0003] The cubic boron nitride abrasive grains thus obtained are used, for example, in electrod...

Claims

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Application Information

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IPC IPC(8): C09K3/14B24D3/00B22F1/18B24D3/06
CPCC04B2235/52B24D3/06C04B2235/386C04B2235/5418C04B2235/762C04B35/62842C09K3/1409C25D7/00C23C18/32C23C18/1865C23C18/1651C22C1/053B22F2999/00C23C18/1882C23C18/1653C23C18/1635B22F1/18B24D3/02C09K3/14
Inventor 大坪裕彦井原荣治清水达也
Owner SHOWA DENKO KK
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