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High zinc magnesium alloy containing silicon, and its preparation process

A preparation process and technology for magnesium alloys, applied in the field of alloys, can solve problems such as specific gravity segregation and high density, and achieve the effects of improving mechanical properties, improving fluidity, and being easy to add.

Inactive Publication Date: 2006-06-14
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Sb has a high density and is prone to specific gravity segregation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1 (1 # alloy): Mg-6Zn-3Al-0.3Mn-0.36Si

[0040] Preparation process: 1) Burn the crucible to dark red (400°C), sprinkle JDRJ1 covering agent (produced by Shanghai Jiaotong University) on the inner wall and bottom, add industrial pure magnesium ingots, aluminum ingots and Al-Mn master alloy, and sprinkle on it Put the covering agent in the furnace and heat up to 720°C; 2) Add pure Zn after the furnace charge is completely melted; 3) After the Zn is melted, add Al-Si master alloy, heat up to 760°C, and keep it warm for 40 minutes; 4) Take out the crucible, Slag removal and refining; the refining temperature is 730°C, and the refining agent JDRJ2 (produced by Shanghai Jiaotong University) is wrapped in aluminum foil and placed in a bell jar, immersed in 2 / 3 of the magnesium liquid and stirred up and down, while continuously sprinkling the scouring agent on the liquid surface until the magnesium There is no white oxide on the liquid surface turning up from the lowe...

Embodiment 2

[0041] Example 2 (2 # Alloy): Mg-10Zn-5Al-0.3Mn-0.71Si

[0042] Preparation process: 1) Burn the crucible to dark red (450°C), sprinkle JDRJ1 covering agent (produced by Shanghai Jiaotong University) on the inner wall and bottom, add industrial pure magnesium ingots, aluminum ingots and Al-Mn master alloy, and sprinkle on it Covering agent, 2) put the crucible into the furnace and heat up to 730°C, 2) add pure Zn after all the furnace materials are melted; 3) add Al-Si master alloy and heat the furnace to 780°C, keep it warm for 30 minutes, 4) take out the crucible , slag removal, and refining; the refining temperature is 750°C, and the refining agent JDRJ2 (produced by Shanghai Jiaotong University) is wrapped in aluminum foil and placed in a bell jar, immersed in 2 / 3 of the magnesium liquid and stirred up and down, while continuously sprinkling the refining agent on the liquid surface until There are no white oxides on the surface of the magnesium liquid turning up from the ...

Embodiment 3

[0043] Embodiment 3 (3 # Alloy): Mg-8Zn-4Al-0.3Mn-0.96Si-AlP (0.01% based on P amount)

[0044] Preparation Process:

[0045] 1) Burn the crucible to dark red (450°C), sprinkle JDRJ1 covering agent on the inner wall and bottom, add industrial pure magnesium ingots, aluminum ingots and Al-Mn master alloy, and sprinkle covering agent on it, and heat up to 730°C. 2) Add pure Zn after the furnace charge is completely melted; 3) After the Zn is melted, add Al-Si master alloy, raise the temperature to 780°C, and keep it for 30 minutes; 4) Add AlP, raise the temperature to 790°C, keep it for 30 minutes, and stir evenly; 5) Take out the crucible, remove slag, and refine; the refining temperature is 740°C. Refining agent JDRJ2 is wrapped with aluminum foil and placed in a bell jar, immersed in 2 / 3 of the magnesium liquid and stirred up and down, while continuously sprinkled with scouring agent on the liquid surface, until no white oxides on the surface of the magnesium liquid come up...

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Abstract

The invention discloses a silicon-containing high-zinc-magnesium alloy and a preparation process thereof. The mass parts of each component are: 6-10% Zn, 2-5% Al, 0.2-0.4% Mn, 0.3-1.6% Si , the balance is Mg, the addition of Si forms Mg 2 Si phase, on the one hand, the fluidity is significantly improved, thereby improving the casting performance, on the other hand, the modifier AlP is added to the Si-containing magnesium alloy, so that the Chinese character Mg 2 Si and the matrix structure of the alloy are obviously refined, which significantly improves the mechanical properties of the alloy at room temperature and high temperature (150°C). The preparation process of the alloy is simple, the modification agent Al-AlP master alloy is easy to add in the magnesium alloy, no pollution, no reaction slag, the modification effect is long-lasting and stable, and overcomes the disadvantages of burning easily and producing a large amount of smoke to pollute the environment when the elemental phosphorus is modified. , to achieve green metamorphism.

Description

Technical field: [0001] The invention belongs to the field of alloy technology, and in particular relates to a low-cost, high-performance silicon-containing high-zinc-magnesium alloy suitable for melt die-casting or gravity casting and a preparation process thereof. Background technique: [0002] As the lightest industrial structural material among metals, magnesium alloy has the characteristics of the best damping performance, high specific strength and specific stiffness, and good magnetic shielding performance. It is favored by the industry and is known as "the most Green engineering materials with development potential and application prospects". At present, the most widely used magnesium alloys in automobiles are Mg-Al series, such as AZ91 and AM60, which are used to manufacture instrument panels, manual transmissions and seat frames. However, this kind of Mg-Al series alloy can only be used at room temperature, and when the temperature exceeds 120°C, the mechanical pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/04
Inventor 关绍康张春香王建强王迎新石广新
Owner ZHENGZHOU UNIV