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A method for manufacturing a corrosion-resistant magnesium alloy transmission case

A manufacturing method and anti-corrosion technology, applied in the field of manufacturing magnesium alloy transmission case, can solve problems such as strong gas sensitivity, influence on the filling performance of alloy liquid, influence on mechanical properties of case material, etc. Solve the lack of anti-oxidation and corrosion resistance and improve the effect of anti-oxidation

Active Publication Date: 2017-01-18
山东蒙沃变速器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the traditional lost foam casting magnesium alloy transmission case, the compounds produced by foam pyrolysis and gasification not only affect the filling performance of the alloy liquid, but also are closely related to the defects of the casting, and the pyrolysis products will react with the alloy liquid and change the alloy liquid. The proportion of ingredients affects the mechanical properties of the box material, especially the magnesium alloy melt is highly sensitive to gas, and it is easy to inhale air to generate pores, resulting in void defects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The components and mass percentages of the cast magnesium alloy material for the transmission case are: Al: 8.6%, Zn: 0.65%, Mn: 0.16%, and the balance is Mg and impurities.

[0025] Proceed as follows:

[0026] 1) Foaming: Polystyrene is selected as the white mold foam material, and the foam model of the transmission case is manufactured by pressure punching using the mature foaming process;

[0027] 2) Clustering: the foam model is clustered in two pieces, and the pouring system and the impurity filter are bonded;

[0028] 3) Brushing paint 1: Add silica sol and sodium alkylsulfonate into the mixing bucket and stir evenly, then slowly add zircon powder into the bucket, stir continuously to prevent agglomeration, add silicone resin and mix well, the addition ratio of the above ingredients Add 1.6ml sodium alkyl sulfonate to 1Kg silica sol, add 3.4Kg zircon powder with a particle size of 320 mesh, add 1.2ml silicone resin, stir for 12 hours, and the viscosity of the sl...

Embodiment 2

[0035] The components and mass percentages of the cast magnesium alloy material for the transmission case are: Al: 3.19%, Zn: 0.81%, Mn: 0.33%, and the balance is Mg and impurities.

[0036] Proceed as follows:

[0037] 1) Foaming: Polystyrene is selected as the white mold foam material, and the foam model of the transmission case is manufactured by pressure punching using the mature foaming process;

[0038] 2) Clustering: the foam model is clustered in two pieces, and the pouring system and the impurity filter are bonded;

[0039] 3) Brushing paint 1: Add silica sol and sodium alkylsulfonate into the mixing bucket and stir evenly, then slowly add zircon powder into the bucket, stir continuously to prevent agglomeration, add silicone resin and mix well, the addition ratio of the above ingredients Add 1.6ml sodium alkyl sulfonate to 1Kg silica sol, add 3.4Kg zircon powder with a particle size of 320 mesh, add 1.2ml silicone resin, stir for 12 hours, and the viscosity of the s...

Embodiment 3

[0046] The components and mass percentages of the cast magnesium alloy material for the transmission case are: Al: 5.2%, Zn: 0.75%, Mn: 0.25%, and the balance is Mg and impurities.

[0047] Proceed as follows:

[0048] 1) Foaming: Polystyrene is selected as the white mold foam material, and the foam model of the transmission case is manufactured by pressure punching using the mature foaming process;

[0049] 2) Clustering: the foam model is clustered in two pieces, and the pouring system and the impurity filter are bonded;

[0050] 3) Brushing paint 1: Add silica sol and sodium alkylsulfonate into the mixing bucket and stir evenly, then slowly add zircon powder into the bucket, stir continuously to prevent agglomeration, add silicone resin and mix well, the addition ratio of the above ingredients Add 1.6ml sodium alkyl sulfonate to 1Kg silica sol, add 3.4Kg zircon powder with a particle size of 320 mesh, add 1.2ml silicone resin, stir for 12 hours, and the viscosity of the sl...

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Abstract

The invention discloses a manufacturing method of a magnesium alloy transmission box with ultrahigh corrosion resistance. The manufacturing method comprises the following steps: performing foaming, forming a cluster structure, swabbing I, swabbing II, hardening, roasting, swabbing III, smelting and pouring, and micro-arc oxidation in sequence, and obtaining a casting of the magnesium alloy transmission box attached with a dense Al2O3 oxidation film on the surface layer. The manufacturing method disclosed by the invention has the following characteristics: during the formwork roasting process, the foamed plastic is burned up in advance to avoid the influence of high-temperature foam gasification to the quality of the casting during the pouring process, avoid the influence of carbon dust to the strength of the magnesium alloy, and ensure the purity of the magnesium alloy material; the nanometer powered aluminum dip-coated before pouring is molten and tightly attached to the surface of the casting at high temperature in the pouring process to form a complete aluminum protective film, and then form the dense Al2O3 oxidation film during the follow-up micro-arc oxidation process, so as to tightly coat the magnesium alloy, improve the oxidation resistance and the corrosion resistance of the magnesium alloy, and solve the problem that the oxidation resistance and the corrosion resistance of the magnesium alloy for the existing transmission box are insufficient.

Description

technical field [0001] The invention relates to the technical field of transmission case manufacturing, in particular to a method for manufacturing a super-corrosion-resistant magnesium alloy transmission case. Background technique [0002] As the lightest metal structure material at present, magnesium alloy has low density, high specific strength and specific stiffness, good damping property, and good shock absorption performance. Magnesium alloy has a low melting point and fast solidification speed, which makes it low energy consumption in the casting process, fast filling, good casting performance, excellent thermal conductivity and electromagnetic shielding performance, and good machinability. It is known as the green engineering material of this century. , It has been widely used in aerospace, automobile, electronics industry and other fields, such as automobile transmission case, cylinder head, wheel hub, seat bracket and so on. With the continuous improvement of ener...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H57/032B22C9/04C25D11/30
CPCB22C9/04C25D11/30F16H57/032
Inventor 张志东马卫东王东周启飞王守仁张少运梁振星燕波刘子利康传贝唐功芹
Owner 山东蒙沃变速器有限公司
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