Powder for grinding and grinding method
a technology of powder and grinding method, which is applied in the direction of manufacturing tools, other chemical processes, chemistry apparatus and processes, etc., can solve the problems of large energy of molten metal, easy breakage of deformed particles, and inability to collect metal powder after use and reuse,
Inactive Publication Date: 2007-07-19
SEIKO EPSON CORP
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Benefits of technology
The present invention provides a powder for grinding that shows sufficient grindability even if the particles are reduced in diameter and is reusable. The powder contains particles with a spherical shape that can easily grind the surface of a base substrate to form concave portions with high dimensional accuracy. The powder also contains specific amounts of Fe, Ni, W, and Cr, which improve mechanical characteristics and corrosion resistance. The powder can be efficiently manufactured using the atomize method, which uses water as a cooling medium to obtain finer powder. The concave portions are grooves with an average width of 0.7 μm and an average particle diameter of 0.07 μm. The powder can be used for grinding at least once and is particularly suitable for grinding surfaces of base substrates.
Problems solved by technology
It is likely that the deformed particles are easily broken when the particles collide with the member to be treated.
Therefore, the metal powder is not suitable for collection after use and for reuse.
Therefore, when molten metal collides with high-pressure water jet, the molten metal is subjected to large energy and scatters to change to finer droplets.
Method used
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example 1
[0129] First, material were weighed to make sure that the following elements are contained in the material at the following contents, respectively, and a mixture of the respective materials was fused in a high-frequency furnace to obtain a fused material.
[0130] Contents of constituent elements
[0131] W: 30 wt %
[0132] Cr: 19 wt %
[0133] B: 1 wt %
[0134] Fe: Remainder
[0135] The fused material obtained was pulverized according to the water atomize method. Consequently, an abrasive was obtained.
[0136] A glass substrate having an average thickness of 3 mm was prepared.
[0137] A glass paste was applied over a base substrate according to the roll coat method. This base substrate was placed on a hot plate and dried at 120° C. for thirty minutes. Consequently, a glass containing layer was obtained on the base substrate.
[0138] After laminating a dry film resist on the glass containing layer, a resist mask (a mask) having a belt-like opening having a width of 150 μm was formed according t...
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Abstract
Powder for grinding according to the present invention is powder for grinding that is manufactured according to the atomize method and serves as a medium for grinding a surface of a base substrate to form concave portions. The powder for grinding contains as its components at least one of Fe and Ni and W (tungsten) and a content of W is 30 to 55 wt % and a specific gravity thereof is equal to or higher than 8.5. Preferably, the powder for grinding further contains Cr at a content of 1 to 25 wt %. Preferably, the powder for grinding further contains B at a content of 0.5 to 4 wt %. It is possible to surely collect the powder for grinding making use of a difference between a specific gravity of the powder for grinding and a specific gravity of grinding wastes. The powder for grinding collected is suitable for being served for reuse at least once.
Description
CROSS-REFERENCE TO RELATED APPLICATION [0001] This application claims a priority to Japanese Patent Applications No. 2005-380459 filed on Dec. 28, 2005 and Japanese Patent Applications No. 2006-289141 filed on Oct. 24, 2006 which are hereby expressly incorporated by reference herein in their entirety. BACKGROUND [0002] 1. Technical Field [0003] The present invention relates to powder for grinding and a grinding method. [0004] 2. Related Art [0005] As an example of a grinding method, there is a method of jetting metal powder onto a member to be treated and causing particles in the metal powder to collide with the member to be treated to thereby grind the member to be treated (a shot blast method). [0006] In the shot blast method, powder of nonmetal materials such as sand and a ceramic material, various kinds of metal powder, and the like are used as abrasives. [0007] In particular, metal powder can give sufficient collision energy (kinetic energy) to the member to be treated even if ...
Claims
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IPC IPC(8): C22C1/05B22F1/00
CPCB24C1/06B24C11/00B24C1/10B24C1/083C09K3/1409
Inventor WATANABE, ATSUSHIIZAKI, HIROSHI
Owner SEIKO EPSON CORP