Zinc-based alloy shot
An alloy and zinc-based technology, applied in metal processing equipment, manufacturing tools, transportation and packaging, etc., can solve the problems of time-consuming spray processing, black spots, low sensitivity of dust cloud explosion, etc., to achieve longer life, suppress wear, suppress The effect of reducing toughness
Active Publication Date: 2013-10-23
SINTOKOGIO LTD
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AI Technical Summary
Problems solved by technology
[0006] Compared with aluminum-based alloy shot and stainless steel shot, the explosion sensitivity of the dust cloud caused by the broken shot of the zinc shot formed only by zinc is low and the lower limit concentration of the explosion is also high.
[0007] However, zinc shot tends to cause black spots on the treated product, and because the Vickers hardness is 40 to 50 HV, it is soft and the surface treatment effect is not sufficient, so blast processing takes time (Patent Document 1, paragraph 0004)
Method used
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Effect test
Embodiment
[0053] Hereinafter, evaluation tests performed to confirm the effects of the present invention will be described.
[0054] The manufacture of each zinc-based alloy shot is to utilize the aforementioned figure 2 The method shown (droplet granulation method) was carried out so that the alloy composition was as shown in Table 1. The pellets produced in this way were classified to prepare projection pellets for each sample having an average particle diameter (median particle diameter) of 1.0 mm. In addition, the following experiments were performed on the pellets of each sample, and the evaluation was performed.
[0055] [Table 1]
[0056]
[0057] 1) Shot peening evaluation experiment
[0058] 100 kg of pellets (average particle diameter 1.0 mm) of each sample prepared above were shot at a target steel material (Rockwell hardness 65 HRC (according to JIS G0202, JIS G0202, JIS Z2245 stipulates)) projection (launch) 5000 times.
[0059] 1) Vickers hardness
[0060] For ea...
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Abstract
This invention provides a zinc-based alloy shot having a new formation and it also provides a method of manufacturing it. The zinc-based alloy shot has Cu added, and it is likely to have a relatively high hardness, and it is less likely to corrode (reduce color change) when it functions as a shot. The zinc-based alloy shot of the present invention comprises Cu as the main additive element for increasing the Vickers hardness, etc., and Fe as a co-additive element for increasing the Vickers hardness and for preventing corrosion. It gives a Vickers hardness of 40-150 HV. The chemical composition of the zinc-based alloy shot is usually Cu: 0.1~13.0%; Fe: 0.0025~0.25%; Zn: balance; and 1@Cu / Fe (measured in mass)@1000.
Description
technical field [0001] The present invention relates to a zinc-based alloy shot mainly used in shot peening aimed at the removal of flashes and burrs of non-ferrous metal products (hereinafter referred to as "deflashing"), and casting Shakeout of products, removal of sticky sand of coating agents and mold release agents, or removal of oxide film and flow marks (hereinafter referred to as "grinding and cleaning (sweeping)"). In particular, it relates to zinc-based alloy pellets suitable for the surface treatment of light alloy articles formed from aluminum alloys, zinc alloys or magnesium alloys. [0002] The meaning of each technical term in this specification and the scope of a claim is as follows. [0003] - The Vickers hardness means the Vickers hardness measured in "JIS Z2244" under the conditions of a test force of 0.4093 N and a test force retention time of 10 to 15 s. In addition, although expressed as "○○○HV0.05", it is abbreviated as "○○○HV" in this text. [0004] ...
Claims
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IPC IPC(8): B24C11/00B22F1/00C22C1/02C22C18/02B22F1/05
CPCB24C11/00B22F9/08B22F1/0011C22C18/02B22F1/05B22F1/00C22C1/02
Inventor 石川政行平井薰
Owner SINTOKOGIO LTD