Zinc alloy

Abstract

The invention discloses a zinc alloy which uses the zinc as a base, and is added with two or all of boron, antimony and magnesium, and a little aluminium. The zinc alloy is characterized by comprising the following components by weight percent: 0.1-0.5 % of the aluminium, 0.001-0.02 % of boron, 0.05-2 % of the antimony, 0.0005-0.05 % of the magnesium, not more than 0.05 % of impurities, and the balance being zinc; and a sum of the weight percent of each component is 100 %. The zinc alloy is high in yield, good in plasticity, small in breakage rate, high in recycling rate; good in corrosion resistance, small in tendency of intergranular corrosion, high in dimension stability; high in product intensity being up to 300 MPa; good in cold plastic processing performance, so that the zinc alloy can be prepared through a drawing technology and a minimum diameter reaches [phi]0.2 mm; and simple in processing technology; and can realize industrial continuous production. Raw materials are cheap and easily available, and a comprehensive cost is low.

Description

technical field [0001] The invention relates to a zinc alloy, in particular to a high-hardness zinc alloy metal abrasive that can be drawn. Background technique [0002] In the field of metal casting, metal surface treatment is an essential process and plays an important role in improving product quality. This is inseparable from metal abrasives. [0003] The existing metal abrasives on the market include reinforced steel shot (HV600~700), stainless steel shot (HV400~600), cast steel shot (HV400~700), copper shot (HV180~205), aluminum shot (HV35~125) , Zinc shot (HV35 ~ 150). Metal abrasives of different materials are selected according to the hardness of the material being processed. For die castings such as aluminum alloys and zinc alloys, due to their low hardness, if metal abrasives with high hardness such as steel shots are used, it is easy to damage the surface of the processed product; the hardness of aluminum alloy shots is suitable, but due to the small specific ...

AI Technical Summary

Problems solved by technology

The disadvantage of this invention is that the product is a cast structure with a coarse structure and defects such as pores, looseness, inclusions and cracks, poor plasticity and dimensional consistency, easy to break during use, and high consumption.

And the hardness of the casting structure is low. The hardness of pure zinc is HV35-40. If the hardness of HV120-200 is to be obtained, the amount of elements added in the composition must be increased.

The content of copper in this patent is relatively high, up to 15%, which greatly increases the raw material cost of the product; the content of magnesium is also high, up to 5%. The melting process and easy oxidation increase the loss and energy of raw materials. consumption

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