CN106048682A - Production technology of corrosion-resistant bolt for automobile transmission system - Google Patents
Production technology of corrosion-resistant bolt for automobile transmission system Download PDFInfo
- Publication number
- CN106048682A CN106048682A CN201610640779.2A CN201610640779A CN106048682A CN 106048682 A CN106048682 A CN 106048682A CN 201610640779 A CN201610640779 A CN 201610640779A CN 106048682 A CN106048682 A CN 106048682A
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- China
- Prior art keywords
- bolt
- concentration
- corrosion
- production technology
- electrolyzer
- 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.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
- C25D7/003—Threaded pieces, e.g. bolts or nuts
-
- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/40—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions
- C23C8/42—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions only one element being applied
- C23C8/44—Carburising
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
- C25D3/565—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of zinc
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
The invention discloses a production technology of a corrosion-resistant bolt for an automobile transmission system. The production technology orderly comprises pretreatment, electroplating and carburizing treatment. The electroplating process comprises putting a bolt in a cathode in an electrolytic tank and putting a zinc-nickel alloy in an anode in the electrolytic tank. The carburizing treatment process comprises thermal insulation in a salt bath furnace at a temperature of 400-480 DEG C for 4.8-5.4h. Transfer time between the electroplating process and the carburizing treatment process is less than or equal to 30s. The technology greatly improves bolt corrosion resistance, reduces bolt heating frequency in production, improves bolt surface electroplated layer firmness and greatly improves a service life.
Description
Technical field
The present invention relates to a kind of production technology, particularly to a kind of car transmissions production work of corrosion-resistant bolt
Skill.
Background technology
Along with the development of science and technology, bolt needs as fastenings indispensable in present all trades and professions, its market
The amount of asking grows with each passing day, and automobile industry is exactly that one of them typically represents, and is both needed to use substantial amounts of spiral shell in each assembly of automobile
It is fixed by bolt, such as: electromotor, wheel, vehicle frame, drive system, shock mitigation system etc., and car transmissions are due to inside
There is a large amount of hydraulic oil, therefore result in the bolt employed in car transmissions and be easily corroded, it is more difficult to meet the most raw
Requirement needed for product.
Summary of the invention
The technical problem that present invention mainly solves is to provide a kind of car transmissions production technology with corrosion-resistant bolt,
The decay resistance of bolt can not only be greatly improved, but also the heating times to bolt can be reduced in process of production,
The electrodeposited coating making bolt surface is more firm, and service life is greatly improved.
For solving above-mentioned technical problem, the technical scheme that the present invention uses is: provide a kind of car transmissions to use
The production technology of corrosion-resistant bolt, specifically includes following steps:
(1), pre-treatment: bolt is put into pickling tube and removes surface oxide layer and dry；
(2), plating: the negative electrode in electrolyzer put into by the bolt after above-mentioned pickling being completed, and is put in electrolyzer by admiro
Anode, be filled with electrolyte in described electrolyzer, described electrolyte by concentration be the sodium silicate of 7-9g/L, concentration be 10-
The sodium hydroxide of 30g/L and the sodium tetraborate that concentration is 12-18g/L mix；
(3), Carburization Treatment: will plating after product be transferred quickly in the salt bath furnace of 400-480 DEG C insulation 4.8-5.4 hour,
Transfer time is less than 30 seconds, is filled with saline solution in described salt bath furnace, and described saline solution is by the potassium chloride that concentration is 7-11g/L, dense
Degree is the sodium sulfate of 17-21g/L, and concentration is 8-12g/L potassium nitrate and the sodium chloride that concentration is 15-21g/L mixes.
In a preferred embodiment of the present invention, described nickel zinc alloy is formed by metallic zinc and the fusion of metallic nickel high temperature, presses
Calculating according to mass percent, the content of described metallic zinc accounts for 78-82%, and the content of described nickel accounts for 18-22%.
In a preferred embodiment of the present invention, the water quality in described electrolyte uses deionized water.
The invention has the beneficial effects as follows: the production technology of the corrosion-resistant bolt of a kind of car transmissions of the present invention can not only
The decay resistance of bolt is enough greatly improved, but also the heating times to bolt can be reduced in process of production so that spiral shell
The electrodeposited coating on bolt surface is more firm, and service life is greatly improved.
Detailed description of the invention
Below presently preferred embodiments of the present invention is described in detail so that advantages and features of the invention can be easier to by
It will be appreciated by those skilled in the art that thus protection scope of the present invention is made apparent clear and definite defining.
Embodiment 1:
A kind of car transmissions production technology of corrosion-resistant bolt, specifically includes following steps:
(1), pre-treatment: bolt is put into pickling tube and removes surface oxide layer and dry；
(2), plating: the negative electrode in electrolyzer put into by the bolt after above-mentioned pickling being completed, and is put in electrolyzer by admiro
Anode, be filled with electrolyte in described electrolyzer, described electrolyte by concentration be the sodium silicate of 7g/L, concentration be 30g/L's
Sodium hydroxide and the sodium tetraborate that concentration is 12g/L mix, described nickel zinc alloy is by metallic zinc and metallic nickel high-temperature molten
Conjunction forms, and calculates according to mass percent, and the content of described metallic zinc accounts for 78%, and the content of described nickel accounts for 22%；
(3), Carburization Treatment: the product after plating is transferred quickly in the salt bath furnace of 400 DEG C insulation 5.4 hours, transfer time
Less than 30 seconds, described salt bath furnace is filled with saline solution, described saline solution by concentration be the potassium chloride of 7g/L, concentration be 17g/L's
Sodium sulfate, concentration is 12g/L potassium nitrate and the sodium chloride that concentration is 21g/L mixes.
Embodiment 2:
A kind of car transmissions production technology of corrosion-resistant bolt, specifically includes following steps:
(1), pre-treatment: bolt is put into pickling tube and removes surface oxide layer and dry；
(2), plating: the negative electrode in electrolyzer put into by the bolt after above-mentioned pickling being completed, and is put in electrolyzer by admiro
Anode, be filled with electrolyte in described electrolyzer, described electrolyte by concentration be the sodium silicate of 9g/L, concentration be 10g/L's
Sodium hydroxide and the sodium tetraborate that concentration is 18g/L mix, described nickel zinc alloy is by metallic zinc and metallic nickel high-temperature molten
Conjunction forms, and calculates according to mass percent, and the content of described metallic zinc accounts for 82%, and the content of described nickel accounts for 18%；
(3), Carburization Treatment: the product after plating is transferred quickly in the salt bath furnace of 480 DEG C insulation 4.8 hours, transfer time
Less than 30 seconds, described salt bath furnace is filled with saline solution, described saline solution by concentration be the potassium chloride of 11g/L, concentration be 21g/L's
Sodium sulfate, concentration is 8g/L potassium nitrate and the sodium chloride that concentration is 15g/L mixes.
Embodiment 3:
A kind of car transmissions production technology of corrosion-resistant bolt, specifically includes following steps:
(1), pre-treatment: bolt is put into pickling tube and removes surface oxide layer and dry；
(2), plating: the negative electrode in electrolyzer put into by the bolt after above-mentioned pickling being completed, and is put in electrolyzer by admiro
Anode, be filled with electrolyte in described electrolyzer, described electrolyte by concentration be the sodium silicate of 8g/L, concentration be 20g/L's
Sodium hydroxide and the sodium tetraborate that concentration is 15g/L mix, described nickel zinc alloy is by metallic zinc and metallic nickel high-temperature molten
Conjunction forms, and calculates according to mass percent, and the content of described metallic zinc accounts for 80%, and the content of described nickel accounts for 20%；
(3), Carburization Treatment: the product after plating is transferred quickly in the salt bath furnace of 450 DEG C insulation 5.1 hours, transfer time
Less than 30 seconds, described salt bath furnace is filled with saline solution, described saline solution by concentration be the potassium chloride of 9g/L, concentration be 19g/L's
Sodium sulfate, concentration is 12g/L potassium nitrate and the sodium chloride that concentration is 21g/L mixes.
Being different from prior art, a kind of car transmissions of present invention production technology of corrosion-resistant bolt is passed through at bolt
One layer of nickel zinc alloy of electroplating surface, carries out Carburization Treatment in being transferred quickly to salt bath furnace subsequently, bolt can not only be greatly improved
Decay resistance, but also the heating times to bolt can be reduced in process of production so that the electrodeposited coating on bolt surface
More firm, service life is greatly improved.
The foregoing is only embodiments of the invention, not thereby limit the scope of the claims of the present invention, every utilize this
Equivalent structure or equivalence flow process that bright description is made convert, or are directly or indirectly used in other relevant technology necks
Territory, is the most in like manner included in the scope of patent protection of the present invention.
Claims (3)
1. the car transmissions production technology of corrosion-resistant bolt, it is characterised in that specifically include following steps:
(1), pre-treatment: bolt is put into pickling tube and removes surface oxide layer and dry；
(2), plating: the negative electrode in electrolyzer put into by the bolt after above-mentioned pickling being completed, and is put in electrolyzer by admiro
Anode, be filled with electrolyte in described electrolyzer, described electrolyte by concentration be the sodium silicate of 7-9g/L, concentration be 10-
The sodium hydroxide of 30g/L and the sodium tetraborate that concentration is 12-18g/L mix；
(3), Carburization Treatment: will plating after product be transferred quickly in the salt bath furnace of 400-480 DEG C insulation 4.8-5.4 hour,
Transfer time is less than 30 seconds, is filled with saline solution in described salt bath furnace, and described saline solution is by the potassium chloride that concentration is 7-11g/L, dense
Degree is the sodium sulfate of 17-21g/L, and concentration is 8-12g/L potassium nitrate and the sodium chloride that concentration is 15-21g/L mixes.
The car transmissions the most according to claim 1 production technology of corrosion-resistant bolt, it is characterised in that described nickel
Kirsite is formed by metallic zinc and the fusion of metallic nickel high temperature, calculates according to mass percent, and the content of described metallic zinc accounts for 78-
82%, the content of described nickel accounts for 18-22%.
The car transmissions the most according to claim 1 production technology of corrosion-resistant bolt, it is characterised in that described electricity
Solve the water quality in liquid and use deionized water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610640779.2A CN106048682A (en) | 2016-08-08 | 2016-08-08 | Production technology of corrosion-resistant bolt for automobile transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610640779.2A CN106048682A (en) | 2016-08-08 | 2016-08-08 | Production technology of corrosion-resistant bolt for automobile transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106048682A true CN106048682A (en) | 2016-10-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610640779.2A Pending CN106048682A (en) | 2016-08-08 | 2016-08-08 | Production technology of corrosion-resistant bolt for automobile transmission system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106048682A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107604406A (en) * | 2017-10-25 | 2018-01-19 | 苏州华丰不锈钢紧固件有限公司 | A kind of electroplating technology of high rigidity bolt |
| CN107955957A (en) * | 2017-11-29 | 2018-04-24 | 芜湖强振汽车紧固件有限公司 | Fastening bolt surface smooth treatment technique |
| CN111749376A (en) * | 2020-03-31 | 2020-10-09 | 江苏长达特钢制品有限公司 | Production process capable of avoiding falling off connecting claw |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4388160A (en) * | 1980-02-20 | 1983-06-14 | Rynne George B | Zinc-nickel alloy electroplating process |
| CN103398067A (en) * | 2013-07-17 | 2013-11-20 | 春雨(东莞)五金制品有限公司 | Bolt manufacturing process |
| CN103643018A (en) * | 2013-11-26 | 2014-03-19 | 常熟市福熙机械零部件制造有限公司 | Thermal processing technology for bolts |
| CN103757181A (en) * | 2013-11-26 | 2014-04-30 | 常熟市福熙机械零部件制造有限公司 | High-strength nut heat treatment technology |
| CN104480477A (en) * | 2014-11-20 | 2015-04-01 | 海盐汇联通用配件有限公司 | Production process of corrosion-resistant high-strength hexagon bolts |
| CN104625617A (en) * | 2014-12-13 | 2015-05-20 | 海盐双赢管件制造有限公司 | High-strength bolt production process |
| CN105063530A (en) * | 2015-08-07 | 2015-11-18 | 昆山—邦泰汽车零部件制造有限公司 | Method for manufacturing high-hardness automobile hardware |
| CN105779738A (en) * | 2014-12-13 | 2016-07-20 | 青岛勤德索具有限公司 | Heat treatment technology of bolt |
-
2016
- 2016-08-08 CN CN201610640779.2A patent/CN106048682A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4388160A (en) * | 1980-02-20 | 1983-06-14 | Rynne George B | Zinc-nickel alloy electroplating process |
| CN103398067A (en) * | 2013-07-17 | 2013-11-20 | 春雨(东莞)五金制品有限公司 | Bolt manufacturing process |
| CN103643018A (en) * | 2013-11-26 | 2014-03-19 | 常熟市福熙机械零部件制造有限公司 | Thermal processing technology for bolts |
| CN103757181A (en) * | 2013-11-26 | 2014-04-30 | 常熟市福熙机械零部件制造有限公司 | High-strength nut heat treatment technology |
| CN104480477A (en) * | 2014-11-20 | 2015-04-01 | 海盐汇联通用配件有限公司 | Production process of corrosion-resistant high-strength hexagon bolts |
| CN104625617A (en) * | 2014-12-13 | 2015-05-20 | 海盐双赢管件制造有限公司 | High-strength bolt production process |
| CN105779738A (en) * | 2014-12-13 | 2016-07-20 | 青岛勤德索具有限公司 | Heat treatment technology of bolt |
| CN105063530A (en) * | 2015-08-07 | 2015-11-18 | 昆山—邦泰汽车零部件制造有限公司 | Method for manufacturing high-hardness automobile hardware |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107604406A (en) * | 2017-10-25 | 2018-01-19 | 苏州华丰不锈钢紧固件有限公司 | A kind of electroplating technology of high rigidity bolt |
| CN107955957A (en) * | 2017-11-29 | 2018-04-24 | 芜湖强振汽车紧固件有限公司 | Fastening bolt surface smooth treatment technique |
| CN111749376A (en) * | 2020-03-31 | 2020-10-09 | 江苏长达特钢制品有限公司 | Production process capable of avoiding falling off connecting claw |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161026 |
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| WD01 | Invention patent application deemed withdrawn after publication |