CN1354055A - Surface alloying process of magnesium alloy in course of solidification - Google Patents
Surface alloying process of magnesium alloy in course of solidification Download PDFInfo
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- CN1354055A CN1354055A CN 01131760 CN01131760A CN1354055A CN 1354055 A CN1354055 A CN 1354055A CN 01131760 CN01131760 CN 01131760 CN 01131760 A CN01131760 A CN 01131760A CN 1354055 A CN1354055 A CN 1354055A
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Abstract
The surface alloying process in the course of solidfiication of magnesium alloy utilizes the metallurgical solidification technology to form gradient distribution of surface layer alloy concentration of magnesium casting. Its key point lies in that the pattern surface is coated with metal powder (for example aluminium, zinc and tin) with different specifications by means of adhesive to form alloying distribution synchronously in the course of casting magnesium alloy. Under the condition of use environment (for example fume corrosion said alloy layer can form compact complex compound layer, and said continuous compact complex compound layer possesses self-generation and self-repairing function and good resistance to fame corrosion and abrasion-resistance.
Description
One, technical field
The present invention relates to give birth in the magnesium alloy solidification moulding process processing method of alloying surface.
Two, background technology
The light specific gravity of magnesium has only 1.8g/cm
3, be equivalent to 2/3 of aluminium, 1/4 of steel.And magnesium alloy specific tenacity and specific rigidity height, heat-conductivity conducting be good, have good damping shock absorption and capability of electromagnetic shielding concurrently; Magnesium alloy is easy to machine-shaping simultaneously, and waste material easily reclaims, and is low in the pollution of the environment, if do the housing and the structural part of electronic installation, to replace plastics, just can satisfy light, thin, the miniaturization of product, requirements such as high integration.The iron and steel and the aluminum alloy junction member that also can replace traffic transport industry, weight reduction improves the energy utilization benefit.But the chemical property of magnesium is active, and is not corrosion-resistant, and this has also greatly limited its range of application.At present; the magnesium alloy anticorrosion traditional method has: anodizing; the resin sealing; paint; electroplate etc.; the frontier nature technology of exploring has: vapour deposition, differential arc oxidation, ion implantation, laser melting coating etc.; above technology is improved the solidity to corrosion of magnesium alloy to some extent; but because modified layer and Mg alloy surface poor bonding strength or thin thickness; use subsequently causes to be peeled off or wears away; can not resemble metals such as aluminium and titanium and constantly form the protective oxide film that has from curing function, easily lose its provide protection in the use.
Three, summary of the invention
The objective of the invention is to overcome the defective of present Magnesiumalloy surface modifying technology, a kind of surface alloying process of magnesium alloy in course of solidification is provided.Form zone, magnesium alloy top layer alloying by cast shaping process; this alloy layer not only keeps metallurgical binding with magnesium alloy substrate; and composition and controllable thickness; in the salt air corrosion process; this alloy layer forms complex compound; this complex compound has from being conigenous doctor's function and fine and close continuously; good salt air corrosion drag and fastness to wear are arranged; promptly this complex compound is in case ground off by machinery; can form new protective layer; so fundamentally changed the Mg alloy surface physicochemical property, also simplified the existing surface modification technology of magnesium alloy, be applicable to the manufacturing of magnesium alloy component under the coagulation forming condition.
The present invention forms magnesium foundry goods top layer alloy concentrations gradient distribution by metallurgical solidification technology; Its main points are that the metal powder of different size (as aluminium; Zinc; Tin) is applied to the apperance surface with binding agent; form alloying in the magnesium alloy pouring process synchronously, this alloy layer ( as salt air corrosion ) under environment for use can form fine and close complex compound layer.Table 1 has provided proportioning example and solidity to corrosion ( the obvious corrosion pit time appears in neutral salt spray corrosion test ) contrast that negative pressure real type phenolic disappearance mould moulding process condition foundry goods top layer alloying forms.Table 2 has provided proportioning example and solidity to corrosion ( the obvious corrosion pit time appears in neutral salt spray corrosion test ) contrast that compression molding process condition foundry goods top layer alloying forms.1 ( ％ ) ZM51 100 2.32 100 3.63 100 2.74 / 27 4.85 / 50 12.72 ( ％ ) ZM51 100 1.62 100 2.83 100 2.14 / 27 3.85 / 50 8.7：
A. earlier metal is prepared in the Different Weight ratio, mixing is controlled at the 70-400 order with its granularity, makes and mixes the powder process material;
B. add binding agent and alcohol in mixed powder process material, stirring and evenly mixing is made the powder masking liquid;
C. blended powder masking liquid is coated on the foam plastics mould, thickness is 0.05～3.0mm, and dry back forms the powder coating, is applied on the powder coating with coating, 20～50 ℃ of oven dry; Or powder liquid is sprayed on the die casting, thickness is 0.02～0.3mm, utilizes dry technology to form the alloy powder coating;
E. vacuumizing under the dry molding condition, the liquid magnesium alloy pouring is cooled off in foam plastics mould; Or under the die casting condition, with the die casting cooling in metallic mould of liquid magnesium alloy pouring.
Metal of the present invention is the mixture of aluminium powder, zinc powder, glass putty or aluminium powder and zinc powder; Binding agent is a polyvinyl butyral acetal, and weight ratio is 0.006～0.01%; The weight ratio of alcohol is 45%～80%; Coating is alcohol-base paint; Weight ratio in aluminium powder in the metal mixture of Different Weight ratio preparation is 27%～50%, and the weight ratio of zinc powder is 50%～73%.
Four, embodiment
Embodiment 1:
Getting granularity is 70 purpose aluminium powders; Add weight ratio and be 0.006% polyvinyl butyral acetal and weight ratio in aluminium powder and be 45% alcohol, stirring and evenly mixing is made the powder masking liquid; The powder masking liquid is coated on the foam plastics mould, and thickness is 0.05mm, and dry back forms the powder coating, is applied on the powder coating with alcohol-base paint, 20 ℃ of oven dry; Vacuumizing under the dry molding condition, the liquid magnesium alloy pouring is cooled off in foam plastics mould.
Embodiment 2:
Getting granularity is 70 purpose aluminium powders; Add weight ratio and be 0.008% polyvinyl butyral acetal and weight ratio in aluminium powder and be 45% alcohol, stirring and evenly mixing is made the powder masking liquid; The powder masking liquid is sprayed on the die casting, and thickness is 0.02mm, is dried to form the alloy powder coating; Under the die casting condition, with the die casting cooling in metallic mould of liquid magnesium alloy pouring.
Embodiment 3:
Getting granularity is 250 purpose aluminium powders; Add weight ratio and be 0.009% polyvinyl butyral acetal and weight ratio in aluminium powder and be 60% alcohol, stirring and evenly mixing is made the powder masking liquid; The powder masking liquid is coated on the foam plastics mould, and thickness is 1.5mm, and dry back forms the powder coating, is applied on the powder coating with alcohol-base paint, 35 ℃ of oven dry; Vacuumizing under the dry molding condition, the liquid magnesium alloy pouring is cooled off in foam plastics mould.
Embodiment 4:
Getting granularity is 270 purpose aluminium powders; Adding weight ratio in aluminium powder is that 0.01% polyvinyl butyral acetal and weight ratio are 68% alcohol, and stirring and evenly mixing is made the powder masking liquid; The powder masking liquid is sprayed on the die casting, and thickness is 0.2mm, is dried to form the alloy powder coating; Under the die casting condition, with the die casting cooling in metallic mould of liquid magnesium alloy pouring.
Embodiment 5:
Getting granularity is 400 purpose aluminium powders; Add weight ratio and be 0.007% polyvinyl butyral acetal and weight ratio in aluminium powder and be 80% alcohol, stirring and evenly mixing is made the powder masking liquid; The powder masking liquid is coated on the foam plastics mould, and thickness is 3.0mm, and dry back forms the powder coating, is applied on the powder coating with alcohol-base paint, 50 ℃ of oven dry; Vacuumizing under the dry molding condition, the liquid magnesium alloy pouring is cooled off in foam plastics mould.
Embodiment 6:
Getting granularity is 400 purpose aluminium powders; Add weight ratio and be 0.009% polyvinyl butyral acetal and weight ratio in aluminium powder and be 80% alcohol, stirring and evenly mixing is made the powder masking liquid; The powder masking liquid is sprayed on the die casting, and thickness is 0.3mm, is dried to form the alloy powder coating; Under the die casting condition, with the die casting cooling in metallic mould of liquid magnesium alloy pouring.
Embodiment 7:
Getting granularity is 70 purpose zinc powders; Add weight ratio and be 0.01% polyvinyl butyral acetal and weight ratio in zinc powder and be 80% alcohol, stirring and evenly mixing is made the powder masking liquid; The powder masking liquid is coated on the foam plastics mould, and thickness is 0.05mm, and dry back forms the powder coating, is applied on the powder coating with alcohol-base paint, 50 ℃ of oven dry; Vacuumizing under the dry molding condition, the liquid magnesium alloy pouring is cooled off in foam plastics mould.
Embodiment 8:
Getting granularity is 70 purpose zinc powders; Add weight ratio and be 0.006% polyvinyl butyral acetal and weight ratio in zinc powder and be 65% alcohol, stirring and evenly mixing is made the powder masking liquid; Powder liquid is sprayed on the die casting, and thickness is 0.3mm, is dried to form the alloy powder coating; Under the die casting condition, with the die casting cooling in metallic mould of liquid magnesium alloy pouring.
Embodiment 9:
Getting granularity is 250 purpose zinc powders; Add weight ratio and be 0.008% polyvinyl butyral acetal and weight ratio in aluminium powder and be 45% alcohol, stirring and evenly mixing is made the powder masking liquid; The powder masking liquid is coated on the foam plastics mould, and thickness is 1.5mm, and dry back forms the powder coating, is applied on the powder coating with alcohol-base paint, 20 ℃ of oven dry; Vacuumizing under the dry molding condition, the liquid magnesium alloy pouring is cooled off in foam plastics mould.
Embodiment 10:
Getting granularity is 400 purpose zinc powders; Add weight ratio and be 0.01% polyvinyl butyral acetal and weight ratio in zinc powder and be 45% alcohol, stirring and evenly mixing is made the powder masking liquid; The powder masking liquid is sprayed on the die casting, and thickness is 0.02mm, is dried to form the alloy powder coating; Under the die casting condition, with the die casting cooling in metallic mould of liquid magnesium alloy pouring.
Embodiment 11:
Getting granularity is 250 purpose glass puttys; Add weight ratio and be 0.008% polyvinyl butyral acetal and weight ratio in glass putty and be 45% alcohol, stirring and evenly mixing is made the powder masking liquid; The powder masking liquid is coated on the foam plastics mould, and thickness is 1.5mm, and dry back forms the powder coating, is applied on the powder coating with alcohol-base paint, 20 ℃ of oven dry; Vacuumizing under the dry molding condition, the liquid magnesium alloy pouring is cooled off in foam plastics mould.
Embodiment 12:
Getting granularity is 400 purpose glass puttys; Add weight ratio and be 0.009% polyvinyl butyral acetal and weight ratio in zinc powder and be 80% alcohol, stirring and evenly mixing is made the powder masking liquid; The powder masking liquid is sprayed on the die casting, and thickness is 0.3mm, is dried to form the alloy powder coating; Under the die casting condition, with the die casting cooling in metallic mould of liquid magnesium alloy pouring.
Embodiment 13:
The zinc powder of getting 27% aluminium powder and 73% mixes, and its granularity is controlled at 70 orders; Add weight ratio and be 0.009% polyvinyl butyral acetal and weight ratio in aluminium powder and zinc powder and be 45% alcohol, stirring and evenly mixing is made the powder masking liquid; The powder masking liquid is coated on the foam plastics mould, and thickness is 0.05mm, and dry back forms the powder coating, is applied on the powder coating with alcohol-base paint, 20 ℃ of oven dry; Vacuumizing under the dry molding condition, the liquid magnesium alloy pouring is cooled off in foam plastics mould.
Embodiment 14:
The zinc powder of getting 50% aluminium powder and 50% mixes, and its granularity is controlled at 400 orders; Add weight ratio and be 0.008% polyvinyl butyral acetal and weight ratio in aluminium powder and zinc powder and be 80% alcohol, stirring and evenly mixing is made the powder masking liquid; The powder masking liquid is sprayed on the die casting, and thickness is 0.02mm, is dried to form the alloy powder coating; Under the die casting condition, with the die casting cooling in metallic mould of liquid magnesium alloy pouring.
Embodiment 15:
The zinc powder of getting 40% aluminium powder and 60% mixes, and its granularity is controlled at 320 orders; Add weight ratio and be 0.01% polyvinyl butyral acetal and weight ratio in aluminium powder and zinc powder and be 73% alcohol, stirring and evenly mixing is made the powder masking liquid; The powder masking liquid is coated on the foam plastics mould, and thickness is 3.0mm, and dry back forms the powder coating, is applied on the powder coating with alcohol-base paint, 35 ℃ of oven dry; Vacuumizing under the dry molding condition, the liquid magnesium alloy pouring is cooled off in foam plastics mould.
Embodiment 14:
The zinc powder of getting 27% aluminium powder and 73% mixes, and its granularity is controlled at 280 orders; Add weight ratio and be 0.009% polyvinyl butyral acetal and weight ratio in aluminium powder and zinc powder and be 45% alcohol, stirring and evenly mixing is made the powder masking liquid; The powder masking liquid is sprayed on the die casting, and thickness is 0.3mm, utilizes dry technology to form the alloy powder coating; Under the die casting condition, with the die casting cooling in metallic mould of liquid magnesium alloy pouring.
Claims (9)
1, a kind of surface alloying process of magnesium alloy in course of solidification is characterized in that:
A. earlier metal is prepared in the Different Weight ratio, mixing is controlled at the 70-400 order with its granularity, makes and mixes the powder process material;
B. add binding agent and alcohol in mixed powder process material, stirring and evenly mixing is made the powder masking liquid;
C. well-mixed powder masking liquid is coated on the foam plastics mould, thickness is 0.05～3.0mm, and dry back forms the powder coating, is applied on the powder coating with coating, 20～50 ℃ of oven dry; Or the powder masking liquid is sprayed on the die casting, thickness is 0.02～0.3mm, utilizes dry technology to form the alloy powder coating;
E. vacuumizing under the dry molding condition, the liquid magnesium alloy pouring is cooled off in foam plastics mould; Or under the die casting condition, with the die casting cooling in metallic mould of liquid magnesium alloy pouring.
2, surface alloying process of magnesium alloy in course of solidification according to claim 1 is characterized in that: said metal is the mixture of aluminium powder, zinc powder, glass putty or aluminium powder and zinc powder.
3, surface alloying process of magnesium alloy in course of solidification according to claim 1 is characterized in that: said binding agent is a polyvinyl butyral acetal, and weight ratio is 0.006～0.01%.
4, surface alloying process of magnesium alloy in course of solidification according to claim 1 is characterized in that: the weight ratio of said alcohol is 45%～80%.
5, surface alloying process of magnesium alloy in course of solidification according to claim 1 is characterized in that: said coating is alcohol-base paint.
6, surface alloying process of magnesium alloy in course of solidification according to claim 1 and 2 is characterized in that: said weight ratio in aluminium powder in the metal mixture of Different Weight ratio preparation is 27%～50%, and the weight ratio of zinc powder is 50%～73%.
7, surface alloying process of magnesium alloy in course of solidification according to claim 1 is characterized in that: getting granularity is 70 purpose aluminium powders; Add weight ratio and be 0.006% polyvinyl butyral acetal and weight ratio in aluminium powder and be 45% alcohol, stirring and evenly mixing is made the powder masking liquid; The powder masking liquid is coated on the foam plastics mould, and thickness is 0.05mm, and dry back forms the powder coating, is applied on the powder coating with alcohol-base paint, 20 ℃ of oven dry; Vacuumizing under the dry molding condition, the liquid magnesium alloy pouring is cooled off in foam plastics mould.
8, surface alloying process of magnesium alloy in course of solidification according to claim 1 is characterized in that: getting granularity is 250 purpose glass puttys; Add weight ratio and be 0.01% polyvinyl butyral acetal and weight ratio in glass putty and be 45% alcohol, stirring and evenly mixing is made the powder masking liquid; The powder masking liquid is coated on the foam plastics mould, and thickness is 1.5mm, and dry back forms the powder coating, is applied on the powder coating with alcohol-base paint, 20 ℃ of oven dry; Vacuumizing under the dry molding condition, the liquid magnesium alloy pouring is cooled off in foam plastics mould.
9, surface alloying process of magnesium alloy in course of solidification according to claim 1 is characterized in that: the zinc powder of getting 50% aluminium powder and 50% mixes, and its granularity is controlled at 400 orders; Add weight ratio and be 0.008% polyvinyl butyral acetal and weight ratio in aluminium powder and zinc powder and be 80% alcohol, stirring and evenly mixing is made the powder masking liquid; The powder masking liquid is sprayed on the die casting, and thickness is 0.02mm, is dried to form the alloy powder coating; Under the die casting condition, with the die casting cooling in metallic mould of liquid magnesium alloy pouring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01131760 CN1118345C (en) | 2001-10-24 | 2001-10-24 | Surface alloying process of magnesium alloy in course of solidification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01131760 CN1118345C (en) | 2001-10-24 | 2001-10-24 | Surface alloying process of magnesium alloy in course of solidification |
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| CN1354055A true CN1354055A (en) | 2002-06-19 |
| CN1118345C CN1118345C (en) | 2003-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 01131760 Expired - Fee Related CN1118345C (en) | 2001-10-24 | 2001-10-24 | Surface alloying process of magnesium alloy in course of solidification |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7141207B2 (en) * | 2004-08-30 | 2006-11-28 | General Motors Corporation | Aluminum/magnesium 3D-Printing rapid prototyping |
| CN101698229B (en) * | 2008-11-10 | 2012-04-18 | 大连交通大学 | Surface mixed and modified powder infiltration technology of magnesium diecast alloy |
| CN102601347A (en) * | 2012-04-27 | 2012-07-25 | 重庆大学 | Casting device and method of coated magnesium alloy casting by using in-mould spraying method |
| CN112157221A (en) * | 2020-09-28 | 2021-01-01 | 安徽七里松铝业科技有限公司 | Shaping mold for manufacturing aluminum alloy column and using method |
-
2001
- 2001-10-24 CN CN 01131760 patent/CN1118345C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7141207B2 (en) * | 2004-08-30 | 2006-11-28 | General Motors Corporation | Aluminum/magnesium 3D-Printing rapid prototyping |
| CN101698229B (en) * | 2008-11-10 | 2012-04-18 | 大连交通大学 | Surface mixed and modified powder infiltration technology of magnesium diecast alloy |
| CN102601347A (en) * | 2012-04-27 | 2012-07-25 | 重庆大学 | Casting device and method of coated magnesium alloy casting by using in-mould spraying method |
| CN102601347B (en) * | 2012-04-27 | 2014-04-23 | 重庆大学 | Casting device and method of coated magnesium alloy casting by using in-mould spraying method |
| CN112157221A (en) * | 2020-09-28 | 2021-01-01 | 安徽七里松铝业科技有限公司 | Shaping mold for manufacturing aluminum alloy column and using method |
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| Publication number | Publication date |
|---|---|
| CN1118345C (en) | 2003-08-20 |
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