CN109182853B - Surface treatment process for aluminum alloy die - Google Patents
Surface treatment process for aluminum alloy die Download PDFInfo
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- CN109182853B CN109182853B CN201811444933.4A CN201811444933A CN109182853B CN 109182853 B CN109182853 B CN 109182853B CN 201811444933 A CN201811444933 A CN 201811444933A CN 109182853 B CN109182853 B CN 109182853B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/05—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
- C23C18/32—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
- C23C28/322—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer only coatings of metal elements only
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
- C23C28/345—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates with at least one oxide layer
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/024—Anodisation under pulsed or modulated current or potential
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
- C25D11/08—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing inorganic acids
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
- C25D11/10—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing organic acids
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Abstract
The invention discloses a surface treatment process for an aluminum alloy die, and aims to provide the surface treatment process for the aluminum alloy die, which has the advantages of good oxide layer forming effect, high uniformity, simple process and strong usability, and the technical scheme is characterized by comprising the following steps of: (1) selecting materials; (2) molding; (3) surface treatment; (4) heat treatment; (5) mechanical surface modification treatment and post-treatment; (6) the invention is suitable for the technical field of surface treatment processes of aluminum alloy molds.
Description
Technical Field
The invention relates to the technical field of aluminum alloy die surface treatment processes, in particular to an aluminum alloy die surface treatment process.
Background
The surface of the aluminum alloy mold may be caused by the use thereof. The abrasion of the surface of the aluminum alloy die even influences the forming effect of the aluminum alloy die.
In order to solve the problems, a surface hardening process needs to be performed on the surface of the aluminum alloy die, and the traditional surface treatment process of the aluminum alloy die has poor forming effect of an aluminum oxide protective layer, so that the protection effect of the aluminum alloy die is influenced; in addition, in the conventional surface treatment process, the electrolyte is not generally used in a process similar to a water circulation system, so that the concentration of the electrolyte is not uniformly distributed in an electrolytic tank, an oxidation layer with different thicknesses is formed on the surface of a finished product, and the surface of a mold has defects such as flowering and half spots.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the surface treatment process for the aluminum alloy die, which has the advantages of good oxide layer forming effect, high uniformity, simple process and strong usability.
In order to achieve the purpose, the invention provides the following technical scheme: a surface treatment process of an aluminum alloy die comprises the following steps: (1) selecting materials: the 6061T aluminum alloy material is selected, and comprises the following components in percentage by weight: 0.15 to 0.4 percent of copper Cu, 0.15 percent of manganese Mn, 0.8 to 1.2 percent of magnesium Mg, 0.25 percent of zinc Zn, 0.04 to 0.35 percent of chromium Cr, 0.15 percent of titanium Ti, 0.4 to 0.8 percent of silicon Si, 0.7 percent of iron Fe and the balance of Al;
(2) molding: forming an aluminum alloy die through the working procedures of blanking, spot welding assembly and hydraulic forming;
(3) surface treatment: an aluminum alloy die anode oxidation method is adopted to deposit on the surface of an aluminum alloy die to obtain an aluminum oxide coating, and the method comprises the following steps: A. carrying out chemical nickel plating on the aluminum alloy die by a displacement plating or contact plating or true chemical plating method; B. placing the aluminum alloy die obtained in the step A into an oxidation tank with electrolyte for anodic oxidation, wherein the temperature range in the oxidation tank is controlled between 20 ℃ and 40 ℃, and the anodic oxidation comprises the step of firstly, 0.5-6A/dm2The constant current density anodic oxidation is carried out under the constant current density, when the voltage is increased to 200-400V, the constant voltage anodic oxidation is carried out under the constant voltage of 200-400V until the current density is reduced to 0.1-0.7A/dm2Then, the voltage is reduced to 400-500V constant voltage for constant voltage anodic oxidation until the current density is reduced to 0.05-0.08A/dm2The frequency of the pulse current is 100-500 Hz, and the range of the duty ratio is 60-80 percent; C. smearing a weak conductive film on the surface of the aluminum alloy mold, polishing the oxidized surface of the aluminum alloy mold again, forming an oxide layer with the thickness of 5-10 microns on the surface of a cavity of the aluminum alloy mold after oxidation, and arranging a circulating device in the oxidation tank;
(4) and (3) heat treatment: carrying out heat treatment on the aluminum alloy die obtained in the step (3);
(5) mechanical surface modification treatment and post-treatment; carrying out mechanical surface modification treatment and post-treatment on the aluminum alloy die subjected to the heat treatment in the step (4) to obtain an aluminum alloy die finished product;
(6) and (6) packaging.
The invention is further configured to: the circulating device comprises an outer air pressure chamber communicated with the oxidation tank and a pneumatic pump arranged above the outer air pressure chamber and communicated with the outer air pressure chamber.
The invention is further configured to: the electrolyte comprises oxalic acid and sulfuric acid, wherein the mass concentration of the oxalic acid is 10-60 g/L, and the mass concentration of the sulfuric acid is 10-40 g/L.
The invention is further configured to: the heat treatment comprises one-time quenching treatment and two-time tempering treatment, and specifically comprises the following steps: the quenching treatment temperature is 800-; the temperature of the first tempering treatment is 480-; the temperature of the second tempering treatment is 600-650 ℃, and the time is 1-1.5 h.
The invention is further configured to: the mechanical surface modification treatment and post-treatment specifically comprise the following steps: and (3) putting the extrusion die into a mechanical roller to perform mechanical surface modification treatment to obtain a semi-finished product of the extrusion die, and performing wax penetration treatment to obtain a finished product of the aluminum alloy die.
By adopting the technical scheme, 1, in the aspect of material selection, the 6061T aluminum alloy material is selected, and the components and the content of each component are as follows: 0.15-0.4 percent of copper Cu, 0.15 percent of manganese Mn, 0.8-1.2 percent of magnesium Mg, 0.25 percent of zinc Zn, 0.04-0.35 percent of chromium Cr, 0.15 percent of titanium Ti, 0.4-0.8 percent of silicon Si, 0.7 percent of iron Fe and the balance of Al, and has good forming effect of an alumina layer on selected materials in order to match the processing method of the invention;
2. in the process, the forming effect of the aluminum oxide protective layer is ensured by adjusting the voltage and detecting the current, so that the forming effect of the aluminum oxide protective layer on an aluminum alloy mold is improved, and the improvement on the structural strength of the aluminum alloy is further improved by heat treatment, mechanical surface modification treatment and post-treatment;
3. the circulating device is arranged in the oxidation tank, so that a surfing-like effect is formed in the oxidation tank, and the electrolyte can achieve a consistent treatment effect at each part of the die;
4. simple process, strong practicability and easy popularization.
Drawings
FIG. 1 is a process flow diagram of an embodiment of the surface treatment process for an aluminum alloy mold according to the present invention.
FIG. 2 is a schematic structural view of a circulation device in an embodiment of the surface treatment process for an aluminum alloy mold according to the present invention.
The reference number in the figure, 1-electrolytic cell, 2-external air pressure chamber, 3-pneumatic pump.
Detailed Description
An embodiment of the surface treatment process for an aluminum alloy mold according to the present invention is further described with reference to fig. 1 to 2.
With reference to fig. 1, a surface treatment process for an aluminum alloy mold includes the following steps: (1) selecting materials: the 6061T aluminum alloy material is selected, and comprises the following components in percentage by weight: 0.15-0.4 percent of copper Cu, 0.15 percent of manganese Mn, 0.8-1.2 percent of magnesium Mg, 0.25 percent of zinc Zn, 0.04-0.35 percent of chromium Cr, 0.15 percent of titanium Ti, 0.4-0.8 percent of silicon Si, 0.7 percent of iron Fe and the balance of Al, and has good forming effect of an alumina layer on selected materials in order to match the processing method of the invention;
(2) molding: forming an aluminum alloy die through the working procedures of blanking, spot welding assembly and hydraulic forming;
(3) surface treatment: an aluminum alloy die anode oxidation method is adopted to deposit on the surface of an aluminum alloy die to obtain an aluminum oxide coating, and the method comprises the following steps: A. the aluminum alloy die is subjected to chemical nickel plating by a displacement plating or contact plating or true chemical plating method, so that after the chemical nickel plating, the forming effect of aluminum oxide on the surface of the aluminum alloy die is improved, the polishing is different, the process is simple and convenient, and the practicability is high; B. placing the aluminum alloy die obtained in the step A into an oxidation tank with electrolyte for anodic oxidation, wherein the electrolyte comprises oxalic acid and sulfuric acid, the mass concentration of the oxalic acid is 10-60 g/L, and the mass concentration of the sulfuric acid is 10-40 g/L, the electrolyte is adopted, the forming effect of an aluminum oxide protective layer is good, the cost is low, the practicability is high, the temperature range in the oxidation tank is controlled between 20 ℃ and 40 ℃, and a circulating device is arranged in the oxidation tank, and in combination with a figure 2, the circulating device comprises an outer air pressure chamber 2 communicated with the oxidation tank 1 and an air pressure pump 3 arranged above the outer air pressure chamber 2 and communicated with the outer air pressure chamber 2, and the surfing effect is formed in the oxidation tank 1 through the arranged circulating device, and the surfing forming mode is as follows: through the atmospheric pressure evacuation of pneumatic pump 3 in with outer plenum 2 for the water level reduces in oxidation groove 1, is being linked together with external atmospheric pressure of outer plenum 2, makes the water level in oxidation groove 1 rise, and after the repetitive operation, just can form the effect of surfing, so that electrolyte can both reach unanimous in each position of mouldThe treatment effect is that the anodic oxidation comprises the first 0.5-6A/dm2The constant current density anodic oxidation is carried out under the constant current density, when the voltage is increased to 200-400V, the constant voltage anodic oxidation is carried out under the constant voltage of 200-400V until the current density is reduced to 0.1-0.7A/dm2Then, the voltage is reduced to 400-500V constant voltage for constant voltage anodic oxidation until the current density is reduced to 0.05-0.08A/dm2The frequency of the pulse current is 100-500 Hz, the duty ratio range is 60-80%, the forming effect of the aluminum oxide protective layer is ensured by adjusting the voltage and detecting the current, so that the forming effect of the aluminum oxide protective layer on the aluminum alloy mold is improved, and the improvement on the structural strength of the aluminum alloy is further improved by heat treatment, mechanical surface modification treatment and post-treatment; C. coating a weak conductive film on the surface of the aluminum alloy mold, polishing the oxidized surface of the aluminum alloy mold again, and forming an oxide layer with the thickness of 5-10 microns on the surface of the cavity of the aluminum alloy mold after oxidation;
(4) and (3) heat treatment: and (4) carrying out heat treatment on the aluminum alloy die obtained in the step (3), wherein the heat treatment comprises primary quenching treatment and secondary tempering treatment, and the method specifically comprises the following steps: the quenching treatment temperature is 800-; the temperature of the first tempering treatment is 480-; the temperature of the second tempering treatment is 600-650 ℃, and the time is 1-1.5 h;
(5) mechanical surface modification treatment and post-treatment; and (3) carrying out mechanical surface modification treatment and post-treatment on the aluminum alloy die subjected to the heat treatment in the step (4) to obtain an aluminum alloy die finished product, which specifically comprises the following steps: putting the extrusion die into a mechanical roller to carry out mechanical surface modification treatment to obtain a semi-finished product of the extrusion die, and carrying out wax penetration treatment to obtain a finished product of the aluminum alloy die;
(6) and (6) packaging.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and those skilled in the art should be able to make general changes and substitutions within the technical scope of the present invention.
Claims (3)
1. The surface treatment process of the aluminum alloy die is characterized by comprising the following steps of: (1) selecting materials: the 6061T aluminum alloy material is selected, and comprises the following components in percentage by weight: 0.15 to 0.4 percent of copper Cu, 0.15 percent of manganese Mn, 0.8 to 1.2 percent of magnesium Mg, 0.25 percent of zinc Zn, 0.04 to 0.35 percent of chromium Cr, 0.15 percent of titanium Ti, 0.4 to 0.8 percent of silicon Si, 0.7 percent of iron Fe and the balance of Al;
(2) molding: forming an aluminum alloy die through the working procedures of blanking, spot welding assembly and hydraulic forming;
(3) surface treatment: an aluminum alloy die anode oxidation method is adopted to deposit on the surface of an aluminum alloy die to obtain an aluminum oxide coating, and the method comprises the following steps: A. carrying out chemical nickel plating on the aluminum alloy die by a displacement plating or contact plating method; B. placing the aluminum alloy mold obtained in the step A into an oxidation tank with an electrolyte for anodic oxidation, wherein the temperature range in the oxidation tank is controlled to be between 20 and 40 ℃, and the anodic oxidation comprises the steps of firstly performing constant current density anodic oxidation under the constant current density of 0.5 to 6A/dm, then performing constant voltage anodic oxidation under the constant voltage of 200-400V when the voltage is increased to 200-400V until the current density is reduced to 0.1 to 0.7A/dm, and then performing constant voltage anodic oxidation under the constant voltage of 400-500V until the current density is reduced to 0.05 to 0.08A/dm, the frequency of the pulse current is 100-500 Hz, and the duty ratio range is 60 to 80 percent; C. smearing a weak conductive film on the surface of the aluminum alloy mold, polishing the oxidized surface of the aluminum alloy mold again, forming an oxide layer with the thickness of 5-10 microns on the surface of a cavity of the aluminum alloy mold after oxidation, and arranging a circulating device in the oxidation tank;
(4) and (3) heat treatment: carrying out heat treatment on the aluminum alloy die obtained in the step (3);
(5) mechanical surface modification treatment and post-treatment; carrying out mechanical surface modification treatment and post-treatment on the aluminum alloy die subjected to the heat treatment in the step (4) to obtain an aluminum alloy die finished product;
(6) packaging the mixture into a package, wherein the package is a plastic package,
the circulating device comprises an outer air pressure chamber communicated with the oxidation tank and a pneumatic pump arranged above the outer air pressure chamber and communicated with the outer air pressure chamber,
the electrolyte comprises oxalic acid and sulfuric acid, wherein the mass concentration of the oxalic acid is 10-60 g/L, and the mass concentration of the sulfuric acid is 10-40 g/L.
2. The aluminum alloy die surface treatment process according to claim 1, wherein the heat treatment comprises one quenching treatment and two tempering treatments, and specifically comprises the following steps: the quenching treatment temperature is 800-; the temperature of the first tempering treatment is 480-; the temperature of the second tempering treatment is 600-650 ℃, and the time is 1-1.5 h.
3. The aluminum alloy die surface treatment process as claimed in claim 1, wherein the mechanical surface modification treatment and post-treatment specifically comprise the following steps: and (3) putting the extrusion die into a mechanical roller to perform mechanical surface modification treatment to obtain a semi-finished product of the extrusion die, and performing wax penetration treatment to obtain a finished product of the aluminum alloy die.
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| RU2806354C1 (en) * | 2023-09-20 | 2023-10-31 | Федеральное государственное бюджетное учреждение высшего образования "Сибирский государственный индустриальный университет" | Surface treatment method for hypoeutectic silumin |
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| CN112553666B (en) * | 2020-11-24 | 2022-02-01 | 中国计量大学 | Preparation method of composite anodic oxide film on aluminum alloy surface |
| CN114481024A (en) * | 2021-12-29 | 2022-05-13 | 江苏佳搏实业发展集团有限公司 | High-performance aluminum alloy die ceramic coating and preparation method thereof |
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| JPH0959794A (en) * | 1995-08-21 | 1997-03-04 | Kobe Steel Ltd | Molding die made of aluminum alloy |
| JP4858668B2 (en) * | 2003-08-27 | 2012-01-18 | 電化皮膜工業株式会社 | Method for producing aluminum and aluminum alloy |
| US7768773B2 (en) * | 2008-01-22 | 2010-08-03 | Avx Corporation | Sintered anode pellet etched with an organic acid for use in an electrolytic capacitor |
| CN101575723B (en) * | 2008-05-09 | 2011-07-06 | 比亚迪股份有限公司 | Anode oxidation method |
| CN103173831B (en) * | 2013-03-19 | 2016-01-20 | 江苏新美星包装机械股份有限公司 | The surface hardening process of bottle blowing machine aluminum alloy mould |
| CN104004967B (en) * | 2014-05-20 | 2017-01-25 | 滁州迪蒙德模具制造有限公司 | Manufacturing method of metal mold |
| CN104928746B (en) * | 2015-06-23 | 2017-06-06 | 华南理工大学 | A kind of method for preparing the three-dimensional interconnection nano-pore anodic oxidation aluminium formwork of micro- curved surface |
| CN205382221U (en) * | 2015-12-21 | 2016-07-13 | 重庆飚风电镀有限公司 | Metalwork anodic oxidation treatment device |
| CN105603269B (en) * | 2016-01-25 | 2018-05-15 | 株洲立众精制科技有限公司 | A kind of manufacture method of aluminum automobile gear box casing |
| CN105951147A (en) * | 2016-05-06 | 2016-09-21 | 江苏国华电力器材有限公司 | Treatment process for abrasion-resistant and corrosion-resistant metal substrate |
| CN106702454B (en) * | 2017-01-24 | 2018-11-09 | 西安天奥新材料科技有限公司 | The surface treatment method and wear-resisting shuttle of weaving aluminium alloy shuttle |
| CN108179400B (en) * | 2017-12-28 | 2019-10-29 | 淮安和通汽车零部件有限公司 | A kind of surface treatment method of extrusion die |
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