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Projection material and method for surface treatment of metal products using the projection material

A technology of surface treatment and sand blasting, which is applied in the direction of workpiece surface treatment equipment, metal rolling, metal rolling, etc., and can solve the problems of non-existent surface treatment methods for projected materials

Active Publication Date: 2021-08-10
SINTOKOGIO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no projection material and surface treatment method that can meet such requirements

Method used

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  • Projection material and method for surface treatment of metal products using the projection material
  • Projection material and method for surface treatment of metal products using the projection material
  • Projection material and method for surface treatment of metal products using the projection material

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Experimental program
Comparison scheme
Effect test

Embodiment

[0065] Hereinafter, examples performed to confirm the effects of the present invention will be described.

[0066] Descaling was performed using the projection material of the present invention, and the surface roughness after the surface treatment was evaluated. The workpiece used in this test is made of SUJ material and cylindrical in shape (the inner ring of a tapered roller bearing). Club), implemented at a projection speed of 73m / s. The shot density is set to the shot density at which coverage reaches 100%. Projection density is set to 150kg / m 2 ~300kg / m 2 . In addition, the evaluation item was surface roughness, and the ten-point average roughness Rz (micrometer) prescribed|regulated by JIS-B0601:2000 was used as a measurement method.

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Abstract

The present invention provides a projection material and a surface treatment method of a metal product using the projection material. In cast steel projection materials for removing scale formed on the surface of metal products by sandblasting, there is provided: a first group, which is a projection whose particle diameter d1 belongs to the first particle diameter interval d1max≥d1>d1min a group of materials having a maximum frequency P1 in the first particle size interval; and a second group which is a group of projective materials whose particle size d2 belongs to the second particle size interval d2max≥d2>d2min and which has in the second particle size interval The maximum frequency P2, the first group and the second group satisfy the relationship of d1max=d2min, and the particle size frequency distribution of the projection material composed of the first group and the second group is substantially continuous.

Description

technical field [0001] The present invention relates to a casting material made of cast iron used in a step of removing scale adhering to the surface of a metal product produced by hot forging or the like, and a surface treatment method using the same. Background technique [0002] In the past, when scales made of oxides adhered to the surface of metal products (such as forging and other processing), in order to perform sandblasting to remove the scales, a shot material made of hard particles was applied to the surface of the metal product. Projected shot peening (for example, Patent Document 1). [0003] Patent Document 1: Japanese Patent Laid-Open No. 2001-121205 [0004] In most metal products, the scale is removed, the size is adjusted as necessary, and the final product is completed through finishing that matches the target metal product. For example, when manufacturing sliding parts such as bearings, processing is performed to provide a large number of small depressi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24C11/00B21B45/04B24C1/06B24C1/08B24C7/00
CPCB21B45/04B24C1/06B24C1/08B24C7/00B24C11/00B21B45/06B24C1/086
Inventor 田沼直也后藤贤谷口隼人
Owner SINTOKOGIO LTD