CN105862027A - Surface treatment technique for aluminum alloy die casting - Google Patents

Surface treatment technique for aluminum alloy die casting Download PDF

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Publication number
CN105862027A
CN105862027A CN201610318016.6A CN201610318016A CN105862027A CN 105862027 A CN105862027 A CN 105862027A CN 201610318016 A CN201610318016 A CN 201610318016A CN 105862027 A CN105862027 A CN 105862027A
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CN
China
Prior art keywords
die casting
aluminum alloy
alloy die
polishing
carried out
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610318016.6A
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Chinese (zh)
Inventor
夏纯翠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anhui Chunqi Power Machinery Co Ltd
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Anhui Chunqi Power Machinery Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Anhui Chunqi Power Machinery Co Ltd filed Critical Anhui Chunqi Power Machinery Co Ltd
Priority to CN201610318016.6A priority Critical patent/CN105862027A/en
Publication of CN105862027A publication Critical patent/CN105862027A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/02—Coating starting from inorganic powder by application of pressure only
    • C23C24/04—Impact or kinetic deposition of particles
    • 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
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F17/00—Multi-step processes for surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by subclass C21D or C22F or class C25
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F3/00—Electrolytic etching or polishing
    • C25F3/16—Polishing
    • C25F3/18—Polishing of light metals
    • C25F3/20—Polishing of light metals of aluminium

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

The invention provides a surface treatment technique for an aluminum alloy die casting. The technique comprises the following steps that 1, the aluminum alloy die casting is provided; 2, surface pretreatment is conducted on the aluminum alloy die casting; 3, cold spraying is conducted on the aluminum alloy die casting; and 4, alkaline electrolysis polishing treatment is conducted on the aluminum alloy die casting. By the adoption of the surface treatment technique for the aluminum alloy die casting, the defects of the surface of the aluminum alloy die casting are overcome, and an aluminum alloy die-cast product high in surface quality is obtained.

Description

A kind of aluminum alloy die casting process of surface treatment
Technical field
The present invention relates to a kind of die casting process of surface treatment, particularly relate to the surface of a kind of aluminum alloy die casting Science and engineering skill.
Background technology
Die casting is the metal forming precision developing a kind of high efficiency, few cutting in metal working process in modern age Casting method.The dimensional accuracy of die casting is high, and surface roughness value is low, has higher intensity and hardness.By In above-mentioned advantage, die-casting process method has been widely used in all trades and professions of national economy.Die casting aluminium closes Gold is current most widely used die-casting material, has good die casting performance, preferable rough surface Degree and less hot crackability.But, the cubical contraction of aluminium alloy is relatively big, and aluminum alloy die casting has Have intrinsic, inevitable casting flaw, as pore, crackle, be mingled with, local dent or current mark etc., broken The surface quality of bad die casting.These defects make following process become highly difficult, also make die-cast product yield simultaneously Low.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, it is provided that a kind of aluminum alloy die casting process of surface treatment, this die casting Part surface treatment method can overcome the defect on aluminum alloy die casting surface, obtains the aluminium alloy that surface quality is higher Die-cast product.
In order to achieve the above object, the step of the aluminum alloy die casting process of surface treatment of the present invention is as follows:
1. aluminium alloy compression casting shaping workpiece is provided；
2. pair aluminum alloy die casting carries out surface preparation；
3. pair aluminum alloy die casting carries out cold spraying
4. pair aluminum alloy die casting carries out Study on Alkaline Electro-Polishing process, the aluminium alloy pressure higher to obtain surface quality Casting product.
Preferred as the present invention, the pretreatment of described step 2 includes:
(1) cleaning die casting；
(2) die casting being carried out blasting treatment, after sandblasting, surface reaches SA2.5 level, and cleanliness factor also should meet National standard requirement；
(3) die casting is carried out sand paper process, at the chip of die casting remained on surface after removal blasting treatment.
Preferred as the present invention, the material of the cold spraying of described step 3 is alumina-bearing material, in this alumina-bearing material The percentage by weight of aluminium is more than 50%.The step of spray treatment includes: the cold spray of defect first being had by die casting Painting processes；It is 50 μm homogeneous metal materials in die casting surface cold spraying a layer thickness the most again.
Preferred as the present invention, the Study on Alkaline Electro-Polishing of described step 4 processes the alkaline polishing solution used System is: add suitable additive in NaOH solution, with the polishing effect obtained, and its process conditions For: CNaOH: 16g/L, CPEG:28ml/L,CST:8g/L,CPTN: 8g/L, anodic current density: 5A/dm2, electricity Pressure: 6.5V,Temperature: 60 DEG C, pH value 11～12, stir speed: 3～5r/s, time: 10min, Anode uses corrosion resistant plate or general steel plate, during polishing, needs agitating solution.
Part after polishing is immersed phosphoric acid and mixed solution (Cr0310g/L, the H of chromic acid3P0430g/L) enter Row membrane removal, to reduce its surface roughness.
The invention have the benefit that a kind of aluminum alloy die casting process of surface treatment that the present invention points out, pass through Carry out cold spraying after aluminum alloy die casting surface is pre-processed, after obtaining uniform outward appearance, carry out alkaline electro again Solve polishing, overcome that aluminum alloy die casting surface is intrinsic, inevitable casting flaw, as pore, Crackle, be mingled with, local dent or current mark etc., improve mechanical performance and the decay resistance of aluminum alloy die casting, The die casting product surface quality obtained is high, can apply in various demand high texture outward appearances and high corrosion-resistant requirement Exterior trimming parts on, and simple to operate, can raise labour productivity by a relatively large margin, save material, instrument, set Standby and electric power etc., have good economy and application prospect.
Detailed description of the invention
For there being further understanding to the purpose of the present invention, method step and functional effect, existing detailed description is as follows:
In the present embodiment, the aluminum alloy die casting process of surface treatment of the present invention, comprise the following steps:
1. aluminium alloy compression casting shaping workpiece is provided；This pack alloy code name is YL112.
2. pair aluminum alloy die casting carries out surface preparation, and step is as follows:
(1) cleaning die casting, the purpose of cleaning is to remove the burr on die casting surface, surface flow marks, attachment Greasy dirt, the dirt such as grease；
(2) die casting being carried out blasting treatment, after sandblasting, surface reaches SA2.5 level, and cleanliness factor also should be expired Foot national standard requirement；Being typically all machine operation, be suitable for high-volume operation, efficiency is high, low cost, quality Stable；
(3) die casting is carried out sand paper process, at the chip of die casting remained on surface after removal blasting treatment. To obtain ganoid die casting.
3. pair aluminum alloy die casting carries out cold spraying.The material of selected cold spraying is alumina-bearing material, this alumina-bearing material The percentage by weight of middle aluminium is more than 50%.The step that cold spraying processes includes: the defect first being had by die casting Cold spraying processes；It is the 50 uniform aluminums of μm in die casting surface cold spraying a layer thickness the most again.
4. pair aluminum alloy die casting carries out Study on Alkaline Electro-Polishing process, and selected alkaline polishing solution system is: Adding suitable additive in NaOH solution, with the polishing effect obtained, its process conditions are: CNaOH: 16g/L,CPEG:28ml/L,CST:8g/L,CPTN: 8g/L, anodic current density: 5A/dm2, voltage: 6.5V,Temperature: 60 DEG C, pH value 11～12, stirs speed: 3～5r/s, time: 10min, sun Pole uses corrosion resistant plate or general steel plate, during polishing, needs agitating solution.
Part after polishing is immersed phosphoric acid and mixed solution (Cr0310g/L, the H of chromic acid3P0430g/L) enter Row membrane removal, to reduce its surface roughness.
Polishing with this process conditions, after leveling, the surface reflectivity of aluminum alloy die casting can reach 87% left side Right.Foundry goods loss is all much better than and has reported at present when its operation temperature, solution service life and polishing simultaneously The effect of alkalescence DC electrolysis glossing.
Process through Study on Alkaline Electro-Polishing, the mechanical performance of aluminum alloy die casting can be improved, improve rubbing of die casting Wipe performance, show good reflective function and decay resistance.
In sum, a kind of aluminum alloy die casting process of surface treatment that the present invention points out, solve aluminium alloy pressure The casting flaw of cast(ing) surface, improves die casting surface quality, can apply in various demand high texture outward appearances With on the exterior trimming parts of high corrosion-resistant requirement and simple to operate, can raise labour productivity by a relatively large margin, have Well economy and application prospect.
Above one embodiment of the present of invention is described in detail, but described content has been only the preferable of the present invention Embodiment, it is impossible to be considered the practical range for limiting the present invention.All according to the present patent application scope made equal Deng change and improvement etc., within all should still belonging to the patent covering scope of the present invention.

Claims (2)

1. an aluminum alloy die casting process of surface treatment, it is characterised in that described technique comprises the following steps:
1) aluminium alloy compression casting shaping workpiece is provided；
2) aluminum alloy die casting is carried out surface preparation, including: cleaning die casting；Die casting is carried out sandblasting Processing, after sandblasting, surface reaches SA2.5 level；Die casting is carried out sand paper process, remove after blasting treatment The chip of die casting remained on surface；
3) aluminum alloy die casting carrying out cold spraying, the material of described cold spraying is alumina-bearing material, this alumina-bearing material The percentage by weight of middle aluminium is more than 50%, and the step of spray treatment includes: the defect first being had by die casting is cold Spray treatment；It is the 50 uniform alumina-bearing materials of μm in die casting surface cold spraying a layer thickness the most again；
4) aluminum alloy die casting being carried out Study on Alkaline Electro-Polishing process, the alkaline polishing solution system of use is: Adding suitable additive in NaOH solution, with the polishing effect obtained, its process conditions are: CNaOH: 16g/L, CPEG: 28ml/L, CST:8g/L, CPTN:8g/L, anodic current density: 5A/dm2, voltage: 6.5V, CNA2CO3: 30g/L, temperature: 60 DEG C, pH value 11～12, stir speed: 3～5r/s, time: 10min, anode is adopted With corrosion resistant plate or general steel plate, during polishing, need agitating solution.
A kind of aluminum alloy die casting process of surface treatment the most according to claim 1, it is characterised in that institute After stating the Study on Alkaline Electro-Polishing process of step 4, the part after polishing need to be immersed phosphoric acid and the mixed solution of chromic acid In carry out membrane removal, to reduce its surface roughness.
CN201610318016.6A 2016-05-12 2016-05-12 Surface treatment technique for aluminum alloy die casting Pending CN105862027A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Publications (1)

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CN105862027A true CN105862027A (en) 2016-08-17

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108048891A (en) * 2017-11-15 2018-05-18 重庆嘉萌鸿业科技有限公司 A kind of aluminium alloy castings surface treatment method
CN108048837A (en) * 2017-12-18 2018-05-18 温州瑞榕汽车零部件制造有限公司 A kind of die casting surface processing technique
CN108203840A (en) * 2017-12-29 2018-06-26 天津圣金特汽车配件有限公司 A kind of magnesium alloy engine support surface processing technique
CN108505107A (en) * 2018-05-21 2018-09-07 衢州学院 Aluminium alloy EBSD sample Study on Alkaline Electro-Polishing liquid and preparation method, electrolytic polishing method
CN110773502A (en) * 2019-09-20 2020-02-11 中江立江电子有限公司 Metal surface treatment equipment and process
CN111118359A (en) * 2020-01-14 2020-05-08 浙江鸿通新材料有限公司 Aluminum alloy material and surface treatment method thereof
CN112276800A (en) * 2020-10-15 2021-01-29 上海交通大学 Method and system for improving surface roughness of casting
CN112643013A (en) * 2020-12-02 2021-04-13 东莞仁海科技股份有限公司 Die casting surface anodic treatment process

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100260932A1 (en) * 2009-04-10 2010-10-14 General Electronic Company Cold spray method of applying aluminum seal strips
CN102312275A (en) * 2011-08-22 2012-01-11 吴江市精工铝字制造厂 Aluminium and aluminium-magnesium alloy electrolytic polishing solution
CN103623985A (en) * 2012-08-29 2014-03-12 汉达精密电子(昆山)有限公司 Pressure casting surface processing method and product produced through method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100260932A1 (en) * 2009-04-10 2010-10-14 General Electronic Company Cold spray method of applying aluminum seal strips
CN102312275A (en) * 2011-08-22 2012-01-11 吴江市精工铝字制造厂 Aluminium and aluminium-magnesium alloy electrolytic polishing solution
CN103623985A (en) * 2012-08-29 2014-03-12 汉达精密电子(昆山)有限公司 Pressure casting surface processing method and product produced through method

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108048891A (en) * 2017-11-15 2018-05-18 重庆嘉萌鸿业科技有限公司 A kind of aluminium alloy castings surface treatment method
CN108048837A (en) * 2017-12-18 2018-05-18 温州瑞榕汽车零部件制造有限公司 A kind of die casting surface processing technique
CN108203840A (en) * 2017-12-29 2018-06-26 天津圣金特汽车配件有限公司 A kind of magnesium alloy engine support surface processing technique
CN108505107A (en) * 2018-05-21 2018-09-07 衢州学院 Aluminium alloy EBSD sample Study on Alkaline Electro-Polishing liquid and preparation method, electrolytic polishing method
CN110773502A (en) * 2019-09-20 2020-02-11 中江立江电子有限公司 Metal surface treatment equipment and process
CN111118359A (en) * 2020-01-14 2020-05-08 浙江鸿通新材料有限公司 Aluminum alloy material and surface treatment method thereof
CN112276800A (en) * 2020-10-15 2021-01-29 上海交通大学 Method and system for improving surface roughness of casting
CN112643013A (en) * 2020-12-02 2021-04-13 东莞仁海科技股份有限公司 Die casting surface anodic treatment process

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