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A kind of method of al-re alloy modified zinc alloy

A zinc alloy and alloy technology, applied in the field of die-casting zinc alloy, can solve the problems of low tensile strength, easy cracking and deformation, poor toughness, etc., and achieve the effect of increasing tensile strength, increasing yield strength and improving microstructure

Active Publication Date: 2016-06-08
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The domestic No. 3 zinc alloy has coarse grains, easy intergranular corrosion, poor physical and chemical properties, and easy cracking and deformation during casting processing;
[0004] 2. The domestic No. 3 zinc alloy has lower tensile strength and poor toughness than "Australia No. 3"

Method used

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  • A kind of method of al-re alloy modified zinc alloy
  • A kind of method of al-re alloy modified zinc alloy

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Experimental program
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Embodiment example

[0025] Experimental preparation of 200kg modified die-casting zinc alloy, the steps are as follows:

[0026] 1. Smelting and metamorphic master alloy

[0027] Melting Huoju No. 3-Al-RE master alloy, its composition weight percentage is as follows:

[0028] Torch No. 3 4.8Kg;

[0029] Al-RE1.2Kg.

[0030] (1) Prepare the smelting and Al-RE mixture of Torch No. 3 first, raise the temperature to 620°C, and stir evenly after 60 minutes.

[0031] (2) After heat preservation for 15-25 minutes, cast out of the furnace at a temperature of 600°C.

[0032] 2. Ingredients

[0033] Analyze the components of the configured master alloy and calculate the mass ratio of each component. Then prepare No. 3 and master alloy of the required torch to ensure accuracy, and its composition weight percentage is as follows:

[0034] Torch No. 3 194Kg;

[0035] Huoju No. 3-Al-RE master alloy 6Kg.

[0036] 3. Melting

[0037] Filling and melting: Prepare the master alloy and the torch No. 3 with...

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Abstract

The invention relates to die-cast zinc alloy and particularly relates to a method for modifying zinc alloy by using Al-RE alloy. According to the method, the Al-RE alloy is added to carry out modification treatment based on the existing 3# die-cast zinc alloy, so as to improve the microstructure of the die-cast zinc alloy, and then, mechanical properties, such as yield strength, tensile strength, elongation percentage, impact toughness and the like, of the die-cast alloy are improved; after modification is carried out through adding Al-RE intermediate alloy, the tensile strength of the 3# die-cast zinc alloy is improved remarkably, and the elongation percentage is increased; die-cast zinc alloy products meeting performance requirements can be produced for users, and the method is applicable to large-batch production of modified zinc alloy.

Description

technical field [0001] The invention relates to die-casting zinc alloy, in particular to a method for modifying Al-RE alloy zinc alloy. Background technique [0002] There are more than 500 kinds of die-casting zinc alloy products, which are widely used in automobiles, tractors, daily construction hardware, electromechanical equipment, instruments, cultural and sports toys, etc. Among them, No. 3 zinc alloy (GZ3) has always been the preferred material for the die-casting industry. It can best balance the requirements of physical and mechanical properties. Its excellent castability and long-lasting dimensional stability make more than 70% of zinc alloy die-casting products use No. 3 Zinc alloy, No. 3 zinc alloy is also especially suitable for surface treatment such as electroplating, oil spraying and chromizing. The research and development of No. 3 zinc alloy originated from a zinc alloy named 4-3 (Zn-4Al-3Cu) developed by the New Jersey Zinc Company in the early 20th centu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/03C22C18/00
Inventor 苏旭平杨廷志吴长军王建华涂浩
Owner CHANGZHOU UNIV
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