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High-strength simple-cutting zine-base alloy and preparation process thereof

A preparation process and easy-cutting technology, applied in the field of new alloy materials, can solve problems such as poor mechanical properties and dimensional stability of alloys, environmental pollution during processing and use, and alloys that cannot be extruded to achieve no intergranular corrosion tendency, Effect of tension relief and high dimensional stability

Inactive Publication Date: 2007-10-24
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the mechanical properties and dimensional stability of the alloy are poor, and the U.S. military department has not succeeded in producing extruded bars of this material.
[0007] Zn-Pd alloys have good cutting performance, but this alloy cannot be extruded; and due to the presence of the toxic element Pd, it is easy to cause environmental pollution during processing and use.
[0008] In a word, apart from the present invention, there is no public report on the zinc-based alloy that can replace HPb59-1 lead brass and realize industrial production.

Method used

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  • High-strength simple-cutting zine-base alloy and preparation process thereof

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Embodiment 1

[0028] The raw materials are general commercial zinc ingots, the rare earths added are Ce+La mixed rare earths, and other alloying elements are added in the form of pure metals. Using graphite crucible smelting, borax refining, according to the weight ratio of copper 2.5-2.65%, magnesium 0.45-0.60%, aluminum 0.20-0.35%, lanthanum 0.01-0.06%, cerium 0.15-0.20%, the balance is added to the industry in the proportion of zinc. Use ingots of zinc, copper, aluminum, magnesium, mixed rare earths; after adding rare earths, stir and slag off; let stand for 5-10 minutes, then cast, the casting temperature is 680-760℃; use water-cooled steel mold casting. In order to ensure the surface quality of the ingot, clean the inner surface of the mold before pouring, and coat the inner surface of the mold with gypsum powder.

[0029] The resulting ingot with a size of 40mm×100mm is extruded into an extrusion cylinder with an inner diameter of 45mm. The preheating temperature of the extrusion cylind...

Embodiment 2

[0035] The second embodiment of the present invention is a profile for bathroom accessories. The alloy profile prepared by the invention is cut and drilled, and the alloy performance meets the processing requirements. After proper surface treatment, the zinc-based alloy pendant has good surface quality and beautiful appearance. After 3 months of use, the surface is still bright, no corrosion marks can be observed with the naked eye, and the size is stable, meeting user requirements.

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Abstract

The invention discloses a high-strength easy-cutting zinc-based alloy and preparing method, which comprises the following parts: 2. 5-2. 65% copper, 0. 45-0. 60% magnesium,0. 20-0. 35% aluminium,0. 01-0. 06% lanthanum,0. 15-0. 20% cerium, and residual zinc. The invention affirms the strength and cutting property of alloy effectively, which saves power and simplifies the technique.

Description

Technical field [0001] The invention belongs to the field of new alloy materials, and more specifically relates to a zinc-based alloy material that replaces lead brass as common structural parts and a preparation process thereof. Background technique [0002] Since the 1930s, there has been a tense situation of copper resources around the world, leading to increasingly expensive copper raw materials. my country's copper resources are inherently insufficient, and the search for alternative copper materials is imminent. However, my country's zinc resources are very rich, and the preparation process of zinc-based alloys is simple, low energy consumption, and low pollution. Therefore, replacing copper with zinc is an ideal choice. At present, brass materials widely used in plumbing and sanitary ware and decoration industries generally contain 1% to 5% of lead, which is easy to dissolve, causing environmental pollution and endangering human health. Therefore, replacing lead-containing...

Claims

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Application Information

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IPC IPC(8): C22C18/02C22C1/02B22D21/00B21C23/00C22F1/16
Inventor 林高用郑小燕张振峰周佳
Owner CENT SOUTH UNIV
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