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Zinc-based alloy shots

A technology of base alloy and aluminum base alloy, which is applied in metal processing equipment, abrasives, manufacturing tools, etc., can solve the problems of high explosion lower limit concentration and low dust cloud explosion sensitivity, and achieve high explosion lower limit concentration, stable surface treatment quality, High sanding and cleaning effect

Active Publication Date: 2012-07-11
SINTOKOGIO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, from the viewpoint of work safety and environmental protection, the use of
[0009] Compared with aluminum-based alloy shot and stainless steel shot, the explosion sensitivity of zinc-based alloy shot to dust cloud caused by shot breaking is low and the lower limit concentration of explosion is also high

Method used

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Examples

Experimental program
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Embodiment

[0062] Next, examples performed together with comparative examples in order to confirm the effects of the first and second inventions will be described.

[0063] Examples 1-1 to 1-8 and Comparative Examples 1-1 to 1-6 correspond to the first invention, and Examples 2-1 to 2-3 and Comparative Examples 2-1 to 2-3 correspond to the second invention.

[0064] The following base metals (ingots) were used as raw materials for the alloying elements. The Fe content (allowable upper limit) is added together with the purity (lower limit) prescribed by JIS of each base metal. In addition, Fe of "No. 1 copper wire shavings" is an estimated value.

[0065] ·Total raw materials of alloying elements: 200kg

[0066] ·Used base metal A (example, comparative example not including embodiment 1-6, 2-3)...

[0067] Zn: common zinc base metal (JISH2107) 99.97%, Fe: 0.01%,

[0068] Al: 3 kinds of aluminum base metals (JISH2102) 99.00%, Fe: 0.80%,

[0069] Cu: No. 1 copper wire shavings (JISH210...

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Abstract

Provided are zinc-based alloy shots which, without risk of dust explosion, are capable of high performance deburring and abrasion cleaning through shot blasting and application of compressive residual stress through shot peening, with low quantities of shots consumed by shot projection. The zinc-based alloy shots include a three-component zinc-based alloy shot wherein 0.5 - 6.5 mass % Al, 0.5 - 4.5 mass % Cu are contained as additional elements, the mass composition ratio of Al to Cu (Al / Cu) is 1.0 - 13.0, the total amount (Al + Cu) is 1.5 - 10.5 mass %, and the Vickers hardness is 90 - 190 HV; and a four-component zinc-based alloy shot wherein 0.5 - 6.5 mass % Al, 0.5 - 4.5 mass % Cu, 0.01 - 0.2 mass % Mg are contained as additional elements, the mass composition ratio of Al to Cu (Al / Cu) is 1.0 - 13.0, the total additional amount (Al + Cu) is 1.5 - 8.0 mass %, and the Vickers hardness is 90 - 190 HV.

Description

technical field [0001] The present invention relates to a shot for shot peening (sand blasting) used in shot peening and shot peening, wherein the shot is aimed at, for example, non-ferrous metals represented by aluminum die-casting products, aluminum casting products, etc. The removal of burrs and burrs of parts (hereinafter referred to as "deburring"), as well as the sanding of castings, the removal of sticky sand of coatings and mold release agents, or the removal of oxide films and flow marks (hereinafter referred to as "grinding") and cleaning"); the purpose of the projection processing is to improve the fatigue strength of the non-ferrous metal parts or the welded part of the non-ferrous metal parts. [0002] In this specification, the Vickers hardness refers to the Vickers hardness measured in JIS Z 2244 under the conditions of a test force of 0.4093N and a holding time of the test force: 10 to 15s, and is represented by "○○○HV0.05". Only abbreviated as "○○○HV". [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24C11/00C22C18/04
CPCC22C18/04B24C1/083B24C11/00B24C1/10B24C1/086C22C18/02
Inventor 山口英二竹上龙也后藤贤谷口隼人
Owner SINTOKOGIO LTD
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