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Zinc-based alloy shot and method for producing same

A manufacturing method and pellet technology, applied in manufacturing tools, metal processing equipment, abrasives, etc., can solve the problems of safety and environmental protection, and achieve high shot peening ability, long life, life and tensile strength. improved effect

Active Publication Date: 2020-02-14
SINTOKOGIO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Mn is subject to the PRTR system, and is not preferable from the viewpoint of safety and environmental protection.

Method used

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  • Zinc-based alloy shot and method for producing same
  • Zinc-based alloy shot and method for producing same
  • Zinc-based alloy shot and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0139] Manufactured from Al, Mg, Cu, and Zn base metal weighed so as to have the ratios shown in Table 1 below, through the aforementioned steps S01 to S06 (type A) or steps S11 to S14 (type B). Zinc-based alloy pellets.

[0140] Type A: a zinc-based alloy produced in steps S01 to S06 of the above-mentioned production method and classified so that the average particle diameter is 0.8 mm and the aforementioned a / b is 1.0 to 1.3.

[0141] Type B: Zinc-based alloy pellets with a wire rod diameter of 0.8 mm produced through steps S11 to S14.

[0142] The following evaluation tests were performed on these zinc-based alloy pellets.

[0143] 100 kg of zinc-based alloy pellets were charged into a shot blasting machine (DZB type: manufactured by Shinto Kogyo Co., Ltd.), and a die-casting part made of aluminum alloy (surface hardness: 100HV) was blasted to evaluate performance. It should be noted that the projection velocity of the zinc-based alloy pellets was 53 m / s.

[0144] The ev...

Embodiment 8

[0165] Example 8 has the same composition as Example 7, but is the result of changing the projection time in the aforementioned hardness adjustment step S06. The hardness of the zinc-based alloy pellets representing type A can be adjusted through the hardness adjustment step S06.

[0166]

[0167] In any of the types of zinc-based alloy pellets, Examples 1 to 16, in which the addition of Al is 0.05 to 2.0% and the addition of Mg is in the range of 0.001 to 0.20%, are all Δ above evaluation. Furthermore, when Cu was added in a small amount in the range of 0.0002 to 0.01%, the evaluation was Δ or higher under any conditions. Here, the △ evaluation is inferior to the ○ evaluation, but there is no practical problem, suggesting that the ○ evaluation or higher can be obtained by optimizing the projection conditions (projection speed, particle size, etc.). Therefore, it turns out that in Examples 1-14, evaluation of the consumption amount was favorable.

[0168] All of Comparati...

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Abstract

Provided is a zinc-based alloy shot that comprises Al, and Mg, with the balance being Zn and unavoidable impurities, in which the Al content is 0.05-0.20 mass% and the Mg content is 0.001-0.20 mass% with respect to the zinc-based alloy shot, and in which the Vickers hardness is 80-150 HV. Cu may also be added to the zinc-based alloy shot as a trace additive element. The added amount of the trace additive element may be 0.0002-0.01 mass% with respect to the zinc-based alloy shot.

Description

technical field [0001] The present invention relates to a zinc-based alloy shot used in blasting and a method for producing the same. Background technique [0002] Sand blasting has long been known to perform surface treatment (deburring, rounding (R corner chamfering), surface roughness adjustment, wrinkle texture processing, etc.) of workpieces by colliding particles called shot particles with workpieces. processing. The material of the shot is selected according to the material of the workpiece and the purpose of processing. For example, in the case of blasting die-cast products made of aluminum alloys, magnesium alloys, and zinc alloys, zinc shot is selected in consideration of blast cleaning ability and dust explosion resistance. [0003] Patent Document 1 discloses pellets formed of zinc. Since such pellets have a Vickers hardness of 40 to 50 HV (regulated by JIS Z2244), their shot blasting ability is low. [0004] Therefore, pellets formed of zinc alloys have been...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24C11/00B22F1/00B22F9/08B24C1/00C22C18/04
CPCB22F1/00B22F9/08B24C1/00B24C11/00C22C18/04
Inventor 加藤佑人田沼直也
Owner SINTOKOGIO LTD