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A kind of wear-resistant zinc-based alloy and its preparation method

An alloy and zinc-based technology, applied in metal processing equipment, manufacturing tools, casting molding equipment, etc., can solve the problems of no effect on plasticity and toughness improvement, poor effect of other mechanical properties, and insignificant improvement of plasticity and toughness, etc., to achieve High plasticity and high toughness, the effect of reducing zinc oxidation

Active Publication Date: 2019-03-01
哈尔滨摩安品图新材料科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, smelting at a temperature above 800°C will cause serious loss of zinc, produce a large amount of zinc oxide, and also produce a large amount of gas to pollute the environment.
The existing heat treatment process for improving the plasticity and toughness of materials is annealing at 220°C-250°C for 10 hours. As a result, the tensile strength and hardness are slightly reduced, and the increase in plasticity and toughness is not obvious, reaching about 8%.
[0006] The existing technology improves the performance of the material by adding alloy elements, including Ti elements, Ni elements, Gr elements, Si elements, and rare earth elements. Ti, Ni, and Gr elements have obvious effects on improving the tensile strength and hardness of zinc-based alloys, but It has no effect on improving the plasticity and toughness; Si element has obvious effect on improving the wear resistance of zinc-based alloys, but it has no effect on improving other mechanical properties; limited

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  • A kind of wear-resistant zinc-based alloy and its preparation method
  • A kind of wear-resistant zinc-based alloy and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Embodiment 1: The preparation method of a wear-resistant zinc-based alloy in this embodiment is as follows:

[0018] (1) Melting: Put the aluminum ingot 1A99 into the melting furnace and heat it to 780°C. After the aluminum ingot is melted, put in the aluminum-copper intermediate alloy AlCu50 and cobalt-aluminum alloy CoAl10, keep the furnace temperature constant, and wait until it is fully melted. Add zinc ingot Zn99.99 and lower the temperature to 680°C, add refining after the alloy is completely melted, and prepare for casting after standing for 10 minutes.

[0019] (2) Casting: The casting mold used for casting is a metal mold. Before casting, the mold is preheated. The preheating temperature is 150° C., and the cold iron is placed on the bottom of the metal mold. The liquid metal is poured into the metal mold after stirring and slag removal. After the casting is completed, cover the top of the mold with an insulating cover plate, and gradually cool the casting from...

Embodiment 2

[0021] Embodiment 2: The preparation method of a wear-resistant zinc-based alloy in this embodiment is as follows:

[0022] (1) Melting: Put the aluminum ingot 1A99 into the melting furnace and heat it to 800°C. After the aluminum ingot is melted, put in the aluminum-copper intermediate alloy AlCu50 and cobalt-aluminum alloy CoAl10, keep the furnace temperature constant, and wait until it is fully melted. Add zinc ingot Zn99.99 and lower the temperature to 650°C. After the alloy is completely melted, it is refined. After standing for 10 minutes, it is ready for casting treatment.

[0023] (2) Casting: The casting mold used for casting is a metal mold. Before casting, the mold is preheated. The preheating temperature is 200° C., and the cold iron is placed on the bottom of the metal mold. The liquid metal is poured into the metal mold after stirring and slag removal. After the casting is completed, cover the top of the mold with an insulating cover plate, and gradually cool the...

Embodiment 3

[0025] Embodiment 3: The preparation method of a wear-resistant zinc-based alloy in this embodiment is as follows:

[0026] (1) Melting: Put the aluminum ingot 1A99 into the melting furnace and heat it to 790°C. After the aluminum ingot is melted, put in the aluminum-copper intermediate alloy AlCu50 and cobalt-aluminum alloy CoAl10, keep the furnace temperature constant, and wait until it is fully melted. Add zinc ingot Zn99.99 and lower the temperature to 670°C. After the alloy is completely melted, it is refined. After standing for 10 minutes, it is ready for casting treatment.

[0027] (2) Casting: The casting mold used for casting is a metal mold. Before casting, the mold is preheated. The preheating temperature is 170° C., and the cold iron is placed on the bottom of the metal mold. The liquid metal is poured into the metal mold after stirring and slag removal. After the casting is completed, cover the top of the mold with an insulating cover plate, and gradually cool the...

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Abstract

The invention discloses a wear-resistance zinc base alloy and a preparation method thereof, and belongs to the technical field of zinc base alloys. The zinc base alloy comprises the following chemicalelements: 27-33 wt.% of Al, 3.0-4.5 wt.% of Cu, 0.010-0.015 wt.% of Co, and the balance of Zn. The preparation method comprises the following steps: (1) an aluminum ingot is positioned in a melting furnace, and is heated to 780-800 DEG C for insulation; after aluminum is molten, an aluminum copper alloy and a cobalt aluminum alloy are added; the furnace temperature is kept invariable until the alloys are totally molten; and a zinc ingot is added, is cooled to 650-680 DEG C, is refined, and is poured after standing by 10 minutes; and (2) the ingot is positioned in a heat treatment furnace, isheated to 340-360 DEG C for insulation by more than 2 hours, and is quenched in water to reach the room temperature; and then, the ingot is positioned in the heat treatment furnace, is heated to 200-230 DEG C for insulation by 10-11 hours, and is naturally cooled under room temperature. The zinc base alloy material achieves high wear resistance, high plasticity and high toughness.

Description

technical field [0001] The invention belongs to the technical field of zinc-based alloys; in particular, it relates to a wear-resistant zinc-based alloy and a preparation method thereof. Background technique [0002] ZA33 zinc-based wear-resistant alloy is mainly aimed at replacing tin bronze products that are widely used in the market. In order to further improve performance, reduce costs, and upgrade products. Zinc-based wear-resistant alloy not only has better strength and plasticity than tin bronze, but also has a small friction coefficient, relatively small thermal effect caused by friction, low expansion coefficient, and good dimensional stability. [0003] In order to replace the traditional use of tin bronze, zinc-based alloy castings are widely used as wear-resistant materials in the manufacture of bearing machinery parts such as bearing bushes and bushings. Although zinc-based alloys have excellent strength and excellent wear resistance, their shortcomings of poor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C18/04C22C1/03C22F1/16B22C9/06
CPCB22C9/06C22C1/03C22C18/04C22F1/002C22F1/165
Inventor 杨闯
Owner 哈尔滨摩安品图新材料科技发展有限公司