A grain refinement method for mg or mg alloy

A technology of grain refinement and alloying, which is applied in the field of grain refinement of Mg or Mg alloys, can solve the problems of many by-products and complicated preparation process, and achieve the effect of excellent effect, wide sources and short processing time

Inactive Publication Date: 2016-08-24
东莞市镁皓镁合金科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the nano-zinc oxide powder needs a high-purity solvent to prepare, and there are many by-products and the preparation process is complicated.

Method used

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  • A grain refinement method for mg or mg alloy
  • A grain refinement method for mg or mg alloy
  • A grain refinement method for mg or mg alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1 Grain refinement treatment of pure Mg

[0036] The powder of industrial zinc ash is observed by scanning electron microscope and its shape is like figure 1 As shown, the energy spectrum analysis chart is as figure 2 As shown, the main composition is Zn and O, in addition to a small amount of Cu and Cl, the specific composition is shown in Table 1. Among them, Cu should be caused by the sublimation of Cu in Zn alloy smelting, and Cl should be caused by the volatilization and deposition of the melt refining agent at high temperature in zinc alloy smelting. The XRD phase analysis results are as image 3 As shown, the phase composition is mainly ZnO with a small amount of impurity phase.

[0037] Table 1 Composition of industrial zinc ash

[0038]

[0039] In order to facilitate the addition of industrial zinc ash to the Mg melt, the industrial zinc ash is mixed with Mg powder and then pressed into an intermediate carrier containing industrial zinc ash. The preparatio...

Embodiment 2

[0051] Example 2 Grain refining treatment of Mg-3Al alloy

[0052] This embodiment is used to illustrate the refining effect of industrial zinc ash on the Mg-3Al alloy. The Mg-3Al alloy is prepared by using metallic aluminum (purity ≥99.0%) and metallic magnesium (purity ≥99.0%) as raw materials.

[0053] The metal aluminum and metal magnesium are prepared according to the required ratio, and the surface oxide scale, water stains and oil stains are removed, and the Mg-3Al alloy is obtained by smelting.

[0054] The industrial zinc ash and Mg powder are mixed and pressed into an intermediate carrier containing industrial zinc ash. The preparation method is as follows: mix 24g magnesium powder and 6g industrial zinc ash uniformly, press it into a Φ30mm round cake under a pressure of 100MPa, and then heat the intermediate carrier of industrial zinc ash to 150°C and press it under a pressure of 60MPa. Its densification is an intermediate carrier for industrial zinc ash.

[0055] Melting ...

Embodiment 3

[0056] Example 3 Grain refining treatment of Mg-3Al alloy

[0057] The alloy material used in this embodiment is the same as that in the second embodiment.

[0058] The molding process of the master alloy carrier containing industrial zinc ash is the same as that of Example 2.

[0059] Melting Mg-3Al alloy, melting temperature is 730℃. After melting, add an intermediate carrier containing industrial zinc ash. The added amount of industrial zinc ash is 2.0%, which corresponds to 2#Mg-3Al alloy. Use RJ-2 flux to protect the melt, manually stir the melt for about 1 min, and then let it stand for 2 min after stirring, then pull the slag out of the furnace for casting. The casting mold is made of carbon steel, and the mold preheating temperature is 250°C.

[0060] Figure 8 Shown is the microstructure photo of 2#Mg-3Al alloy, and its grain size is 86μm after analysis. Compared Figure 7 It can be seen that industrial zinc ash can significantly refine the grains of Mg-3Al alloy, with an ...

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Abstract

The present invention discloses a grain refinement method of MG or MG alloy, including the following steps: (1) preparing the intermediate carrier containing industrial zinc ash: the industrial zinc ash and weight percentage of industrial zinc ash with a weight of 20-40 % are 60 percentage of 60 percentage of 20 to 40 %.~ 80 % of the mg powder is mixed after mixing; (2) melting MG or MG alloys, adding an intermediate carrier containing industrial zinc ash and stirring;The invention has the advantages of simple process operations, easy to control the amount of process operations, simple process operations under the condition of achieving waste recycling and reuse of waste, and simple craftsmanship.The refinement of the MG 合al alloy refinement is particularly significant.

Description

Technical field [0001] The present invention relates to the processing field of Mg or Mg alloy, and in particular to a method for refining the grains of Mg or Mg alloy. Background technique [0002] As the lightest metal structural material at present, Mg and its alloys are often used as ideal substitute materials for materials such as steel, aluminum alloy and engineering plastics, and are widely used in aerospace, automobiles, rail transit, sports equipment, lighting equipment, Metallurgy, chemistry and electrochemistry and other fields. However, poor room temperature plasticity and low yield strength limit the wide application of magnesium alloys. Refining the grains of magnesium alloys can simultaneously increase its strength and plasticity. At present, the most commonly used method for refining the grain size of Mg and its alloys is the inoculation refining method. [0003] Among the Mg alloy inoculation and refinement methods, the carbonaceous inoculation and refinement me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C23/00
Inventor 杜军幸侃石裕同李文芳
Owner 东莞市镁皓镁合金科技有限公司
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