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A kind of casting method of high strength and toughness zznal4y zinc alloy

A high-strength toughness, zinc alloy technology, applied in the field of die-casting zinc alloy, can solve the problem of limited radiation heat transfer effect, achieve the effect of improving the microstructure of the alloy, improving the strength and toughness, and increasing the tensile strength

Active Publication Date: 2021-09-28
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method mainly uses the enhancement of the radiation heat transfer effect of liquid metal in the liquid nitrogen atmosphere to achieve the purpose of cooling the metal liquid, but the radiation heat transfer effect is limited, and the liquid nitrogen environment must be formed in a closed space.

Method used

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  • A kind of casting method of high strength and toughness zznal4y zinc alloy
  • A kind of casting method of high strength and toughness zznal4y zinc alloy
  • A kind of casting method of high strength and toughness zznal4y zinc alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Step 1, ingredients: the raw materials used are industrial pure zinc (99.9%) and industrial pure aluminum (99.9%). Calculate the mass ratio of each component, and use Mettler XS105 electronic balance to weigh. The composition weight percentage is: industrial pure zinc 95.9%, industrial pure aluminum 4.1%.

[0039] Step 2, zinc alloy melting

[0040]Put the zinc alloy raw material and covering agent prepared in step 1 into a high-temperature-resistant corundum crucible, and put the crucible into the melting furnace when the temperature in the melting furnace reaches 680°C. After the sample is completely melted into molten metal, it is fully stirred with a high-temperature resistant quartz rod to prevent component segregation. Stop the power supply to lower the temperature of the molten metal to 620° C., refine the molten alloy with hexachloroethane, and then keep the temperature for 30 minutes to obtain a molten zinc alloy.

[0041] Step 3. Pre-cool the copper tube

...

Embodiment 2

[0048] Step 1, ingredients: the raw materials used are industrial pure zinc (99.9%) and industrial pure aluminum (99.9%). Calculate the mass ratio of each component, and use Mettler XS105 electronic balance to weigh. The composition weight percentage is: industrial pure zinc 95.9%, industrial pure aluminum 4.1%.

[0049] Step 2, zinc alloy melting

[0050] Put the zinc alloy raw material and covering agent prepared in step 1 into a high-temperature-resistant corundum crucible, and put the crucible into the melting furnace when the temperature in the melting furnace reaches 680°C. After the sample is completely melted into molten metal, use a high-temperature-resistant quartz rod to fully stir the molten metal to prevent component segregation. Stop the power supply to lower the temperature of the molten metal to 580° C., refine the molten alloy with hexachloroethane, and then keep it for 30 minutes to prepare the molten zinc alloy.

[0051] Step 3. Pre-cool the copper tube

...

Embodiment 3

[0058] Step 1, ingredients: the raw materials used are industrial pure zinc (99.9%) and industrial pure aluminum (99.9%). Calculate the mass ratio of each component, and use Mettler XS105 electronic balance to weigh. The composition weight percentage is: industrial pure zinc 95.9%, industrial pure aluminum 4.1%.

[0059] Step 2, zinc alloy melting

[0060] Put the zinc alloy raw material and covering agent prepared in step 1 into a high-temperature-resistant corundum crucible, and put the crucible into the melting furnace when the temperature in the melting furnace reaches 680°C. After the sample is completely melted into molten metal, it is fully stirred with a high-temperature resistant quartz rod to prevent component segregation. Stop the power supply to lower the temperature of the molten metal to 540° C., refine the molten alloy with hexachloroethane, and then keep it warm for 30 minutes to obtain a molten zinc alloy.

[0061] Step 3. Pre-cool the copper tube

[0062] ...

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Abstract

The invention discloses a casting method of a high-strength and toughness ZZnAl4Y zinc alloy, which comprises the steps of passing the ZZnAl4Y zinc alloy liquid through a liquid nitrogen cooling copper tube placed obliquely (the size of the copper tube can be: length 304mm, outer diameter 50mm, inner diameter 24mm), copper The upper end of the tube is chamfered to increase the opening size of the upper end and facilitate casting. Through the contact heat transfer between the ZZnAl4Y zinc alloy liquid and the low-temperature copper tube, the ZZnAl4Y zinc alloy liquid is rapidly cooled to near the eutectic temperature and solidified in the metal mold at room temperature, reaching For the purposes of improving the microstructure of the alloy and significantly increasing its tensile strength, elongation and impact toughness, the invention can produce zinc alloy products with high intrinsic quality.

Description

technical field [0001] The invention relates to die-casting zinc alloy, in particular to a casting method for improving the strength and toughness of ZZnAl4Y zinc alloy. Background technique [0002] Zinc alloy material has a variety of excellent characteristics, such as good casting performance, can be die-cast to produce precision parts with complex shapes and thin walls, the surface of castings is smooth, and can be treated with electroplating, spraying, painting and other surface treatments, and the casting energy consumption is small and the cost of raw materials is low. , The production process has no pollution to the environment. Zn-Al alloys are widely used in the die-casting production of motorcycle carburetors, auto parts, hardware products and other fields because of their good wear resistance, superplasticity and creep resistance. Low-aluminum-zinc alloys such as ZZnAl4Y die-cast zinc alloys are widely used in daily equipment because of their low melting point a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C18/04
CPCC22C1/02C22C18/04
Inventor 王建华张凯涂浩吴长军苏旭平
Owner CHANGZHOU UNIV