CN104264105A - Surface treatment method of precision screw - Google Patents
Surface treatment method of precision screw Download PDFInfo
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- CN104264105A CN104264105A CN201410462375.XA CN201410462375A CN104264105A CN 104264105 A CN104264105 A CN 104264105A CN 201410462375 A CN201410462375 A CN 201410462375A CN 104264105 A CN104264105 A CN 104264105A
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- molybdenumdisulphide
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Abstract
The invention provides a surface treatment method of a precision screw. Due to adoption of the surface treatment method, a protective film layer made of an organic polymer can be relatively firmly formed on the thread surface of the precision screw so the anti-wear performance of the precision screw is strengthened and the times of repeatedly dismounting and mounting of the precision screw can be increased.
Description
Technical field
The present invention relates to field of machining, more specifically, relate to a kind of surface treatment method of precision screw.
Background technology
Precision screw has through custom-designed screw thread curve, selects turnery processing to show good metal material as raw material, and is formed by the intermetallic composite coating of high precision.The occlusion ability of precision screw is stable lasting, has higher gas-tight, liquid and closes performance.In order to protect screw thread and strengthen closing, after turnery processing, generally also need to carry out surface treatment to precision screw.
At present, conventional screw surface treatment process comprises coating and fat liquoring.Processed by coating, copper, zinc or zinc phosphide coating, particularly copper coating can be formed at screw surface and there is good performance.But coating is than being easier to wearing and tearing in screw installation and removal process, and generally through the repeated disassembled and assembled of more than three times, coating will lose efficacy because damaging excessively, and cannot repair.It is also a kind of effective surface treatment method that precision screw is smeared thread compound, and can improve the contact condition between screw thread, fill up the space between occlusion screw thread, and can play lubrication in screw thread cargo handling process, cost is also low than coating.But thread compound, preventing the protected effect in precision screw wearing and tearing relatively more weaker, particularly in the insufficient situation of applying amount, can increase screw thread running risk greatly.In addition, precision screw, through turnery processing, inevitably remains trickle financial particle in the middle of its thread pitch.Although naked eyes can be seen hardly, these particles can increase the wearing and tearing of double thread significantly, are difficult to again be removed completely by cleaning simultaneously.
Summary of the invention
In order to overcome above-mentioned defect of the prior art; the invention provides a kind of surface treatment method of precision screw; the method can be formed with in the thread surface of precision screw the protectiveness thin film layer that organic polymer makes more securely; thus strengthen its wear resistance, the number of times of resistance to consumption of precision screw repeated disassembled and assembled can be increased.
The surface treatment method of precision screw of the present invention, is characterized in that, comprises the following steps: the screw thread being rinsed precision screw under ultrasonic oscillation environment by scavenging solution, removes metallic particles therebetween; To through rinsing and the thread surface of dried precision screw, under the temperature condition of 500 to 700 degrees Celsius, carry out nitriding treatment with the nitrogen compound of molten state; To the thread surface of the precision screw after nitriding treatment also cleaning, under the temperature condition of 90 degrees Celsius, carry out phosphatizing treatment with phosphate mixture; The thread surface coating of the precision screw through phosphatizing treatment is mixed with to the powder agent of organic resin and molybdenumdisulphide composition, heat-treats under 150 to 250 degree celsius temperature conditions, be formed with the protectiveness thin film layer that organic polymer is made.
Preferably, the nitrogen compound applied in nitriding treatment is sodium cyanide, potassium cyanide, Zassol, potassium cyanate, sodium carbonate, potassium carbonate mixtures.
Further preferably, in described nitrogen compound, the ratio of each composition is: sodium cyanide 25 weight part, potassium cyanide 10 weight part, Zassol 25 weight part, potassium cyanate 10 weight part, sodium carbonate 20 weight part and potassium carbonate mixtures 10 weight part.
Preferably, described nitrogen compound is Zassol, potassium cyanate, sodium carbonate, potassium carbonate mixtures.
Further preferably, in described nitrogen compound, the ratio of each composition is: Zassol 10 weight part, potassium cyanate 45 weight part, sodium carbonate 10 weight part, potassium carbonate mixtures 35 weight part.
Preferably, the phosphate mixture used in described phosphatizing treatment is the manganous phosphate system solution containing divalent manganesetion, ferrous ion and bivalent nickel ion element.
Preferably, described in be mixed with in the powder agent of organic resin and molybdenumdisulphide composition, described organic resin comprises following at least one: epoxy resin, polyamide-imide base resin.
Further preferably, the epoxy resin molecular-weight average of described organic resin composition is 42000, the molecular-weight average of polyamide-imide base resin is 20000, the particle of molybdenumdisulphide is less than 3 microns, and the ratio of organic resin and molybdenumdisulphide is: organic resin 100 weight part, molybdenumdisulphide 60 to 80 weight part.
Further preferably, during to add in copper and zinc metal-powder in described powder agent at least one, and the particle of described metal-powder is less than 5 microns, described metal-powder and the described ratio being mixed with the powder agent of organic resin and molybdenumdisulphide composition are: metal-powder 20 weight part, powder agent 80 weight part of organic resin and molybdenumdisulphide composition.
Preferably, the time remaining of described nitriding treatment at least 30 minutes, and the time remaining at least 15 minutes of described phosphatizing treatment, continue at least 30 minutes to the heat treatment time of the powder agent being mixed with organic resin and molybdenumdisulphide composition.
The present invention is by above-mentioned surface treatment method; define nitrogenize, phosphorylation and organic polymer three layers of microtexture in the thread surface of precision screw and jointly form covering property film; achieve with the metallic surface of screw thread and engage and protect reliably; strengthen surface abrasion performance; achieve coated to particulate matter residual in metal cutting process; reduce surfaceness, the number of times of resistance to consumption of precision screw repeated disassembled and assembled can be increased.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 is the overview flow chart of the surface treatment method of precision screw of the present invention.
Embodiment
In order to make those skilled in the art person understand technical scheme of the present invention better, and enable above-mentioned purpose of the present invention, feature and advantage become apparent more, below in conjunction with embodiment and embodiment accompanying drawing, the present invention is further detailed explanation.
Fig. 1 is the overview flow chart of the surface treatment method of precision screw of the present invention.Described surface treatment method comprises the steps such as ultrasonic cleaning, matting, nitriding treatment, phosphatizing treatment, coating, thermal treatment.
First, under ultrasonic oscillation environment, rinsed the screw thread of precision screw by scavenging solution, remove metallic particles therebetween.Precision screw part can being inserted in the cell body with ultrasonic transducer, under the condition of ultra-sonic oscillation, will the scavenging solution water flow jet of predetermined flow velocity and pressure be reached to this precision screw part, taking out and drying through repeatedly rinsing after more than 20 minutes.
In chemical water washing process, the main water sample grease-removing agent that adopts carries out degreasing, then cleaning and degreasing agent, then immerses about 10% hydrochloric acid soln about 15 second, and then repeatedly cleans thoroughly with clear water, and fully dry.
The technique of nitriding treatment is under the temperature condition of 500 to 700 degrees Celsius, is inserted by precision screw part in the nitrogen compound of molten state and carries out bathing, time remaining at least 30 minutes.Any one in following two serial nitrogen compounds can be adopted: the nitrogen compound of series one is sodium cyanide, potassium cyanide, Zassol, potassium cyanate, sodium carbonate, potassium carbonate mixtures, and the ratio of preferred each composition is: sodium cyanide 25 weight part, potassium cyanide 10 weight part, Zassol 25 weight part, potassium cyanate 10 weight part, sodium carbonate 20 weight part and potassium carbonate mixtures 10 weight part.The nitrogen compound of series two only includes Zassol, potassium cyanate, sodium carbonate, potassium carbonate mixtures, and the ratio of each composition is: Zassol 10 weight part, potassium cyanate 45 weight part, sodium carbonate 10 weight part, potassium carbonate mixtures 35 weight part.Nitriding treatment can form the coating film of thickness about 2 to 10 microns in thread surface, this microtexture can provide good substrate for follow-up phosphatizing treatment, can realize good combination with the coating layer formed subsequently through phosphatizing treatment.
To the thread surface of the precision screw after nitriding treatment, first cool and carry out degreasing, and then within room temperature rinsing for 5 seconds with the sulfuric acid within concentration 5%, and then rinse well with clear water, carry out pre-treatment with trisodium phosphate again, carry out phosphatizing treatment with phosphate mixture afterwards.Phosphatizing treatment adopts the manganous phosphate system solution containing divalent manganesetion, ferrous ion and bivalent nickel ion element, its part by weight in the solution closes: divalent manganesetion 8g/L, bivalent nickel ion 0.2g/L, ferrous ion 0.5g/L, phosphate 35g/L, visible manganous phosphate is the main composition of solution.Precision screw immerses manganous phosphate system solution bathing at least 15 minutes under the temperature condition of 90 degrees Celsius, forms the coating layer after phosphatizing treatment.Coating layer after the organic polymer generated in subsequent disposal and phosphatizing treatment has extremely strong adhesivity, effectively can promote the durability degree of thread surface protectiveness thin film layer.
To the thread surface of the precision screw through phosphatizing treatment, below even spread be mixed with the powder agent of organic resin, molybdenumdisulphide composition, copper, zinc or copper-zincium mixed metal powder can also be added in this powder agent.In above-mentioned powder agent, described organic resin comprises at least one in epoxy resin and polyamide-imide base resin, and its epoxy resin molecular-weight average is 42000, and the molecular-weight average of polyamide-imide base resin is 20000.The particle of molybdenumdisulphide is less than 3 microns, and the ratio of organic resin and molybdenumdisulphide is: organic resin 100 weight part, molybdenumdisulphide 60 to 80 weight part.The particle of described metal-powder is less than 5 microns, and described metal-powder and the described ratio being mixed with the powder agent of organic resin and molybdenumdisulphide composition are: metal-powder 20 weight part, powder agent 80 weight part of organic resin and molybdenumdisulphide composition.For the precision screw part after coating; at least 30 minutes are heat-treated under 150 to 250 degree celsius temperature conditions; be formed with the protectiveness thin film layer that organic polymer is made; this protectiveness film has good oilness and covering property; and the hardness of self, toughness are all better, and the copper added, zinc metallic particles contribute to improving its wear resistance further.
Visible; the present invention is by above-mentioned surface treatment method; define nitrogenize, phosphorylation and organic polymer three layers of microtexture in the thread surface of precision screw and jointly form covering property film; achieve with the metallic surface of screw thread and engage and protect reliably; strengthen surface abrasion performance; achieve coated to particulate matter residual in metal cutting process, reduce surfaceness, the number of times of resistance to consumption of precision screw repeated disassembled and assembled can be increased.
The above, be only the specific embodiment of the present invention, and the present invention can also be applied in miscellaneous equipment; Size in more than describing and quantity are all only informative, and those skilled in the art can select suitable application size according to actual needs, and do not depart from the scope of the present invention.Protection scope of the present invention is not limited thereto, and is anyly familiar with those skilled in the art in the technical scope that the present invention discloses, the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, the protection domain that protection scope of the present invention should define with claim is as the criterion.
Claims (10)
1. a surface treatment method for precision screw, is characterized in that, comprises the following steps: the screw thread being rinsed precision screw under ultrasonic oscillation environment by scavenging solution, removes metallic particles therebetween; To through rinsing and the thread surface of dried precision screw, under the temperature condition of 500 to 700 degrees Celsius, carry out nitriding treatment with the nitrogen compound of molten state; To the thread surface of the precision screw after nitriding treatment also cleaning, under the temperature condition of 90 degrees Celsius, carry out phosphatizing treatment with phosphate mixture; The thread surface coating of the precision screw through phosphatizing treatment is mixed with to the powder agent of organic resin and molybdenumdisulphide composition, heat-treats under 150 to 250 degree celsius temperature conditions, be formed with the protectiveness thin film layer that organic polymer is made.
2. surface treatment method according to claim 1, is characterized in that, the nitrogen compound applied in nitriding treatment is sodium cyanide, potassium cyanide, Zassol, potassium cyanate, sodium carbonate, potassium carbonate mixtures.
3. surface treatment method according to claim 2, it is characterized in that, in described nitrogen compound, the ratio of each composition is: sodium cyanide 25 weight part, potassium cyanide 10 weight part, Zassol 25 weight part, potassium cyanate 10 weight part, sodium carbonate 20 weight part and potassium carbonate mixtures 10 weight part.
4. surface treatment method according to claim 1, is characterized in that, described nitrogen compound is Zassol, potassium cyanate, sodium carbonate, potassium carbonate mixtures.
5. surface treatment method according to claim 4, is characterized in that, in described nitrogen compound, the ratio of each composition is: Zassol 10 weight part, potassium cyanate 45 weight part, sodium carbonate 10 weight part, potassium carbonate mixtures 35 weight part.
6. the surface treatment method according to above claim any one, is characterized in that, the phosphate mixture used in described phosphatizing treatment is the manganous phosphate system solution containing divalent manganesetion, ferrous ion and bivalent nickel ion element.
7. the surface treatment method according to above claim any one, it is characterized in that, describedly be mixed with in the powder agent of organic resin and molybdenumdisulphide composition, described organic resin comprises following at least one: epoxy resin, polyamide-imide base resin.
8. surface treatment method according to claim 7, it is characterized in that, the epoxy resin molecular-weight average of described organic resin composition is 42000, the molecular-weight average of polyamide-imide base resin is 20000, the particle of molybdenumdisulphide is less than 3 microns, and the ratio of organic resin and molybdenumdisulphide is: organic resin 100 weight part, molybdenumdisulphide 60 to 80 weight part.
9. surface treatment method according to claim 8, it is characterized in that, during to add in copper and zinc metal-powder in described powder agent at least one, and the particle of described metal-powder is less than 5 microns, described metal-powder and the described ratio being mixed with the powder agent of organic resin and molybdenumdisulphide composition are: metal-powder 20 weight part, powder agent 80 weight part of organic resin and molybdenumdisulphide composition.
10. the surface treatment method according to above claim any one, it is characterized in that, the time remaining of described nitriding treatment at least 30 minutes, and the time remaining of described phosphatizing treatment at least 15 minutes, continues at least 30 minutes to the heat treatment time of the powder agent being mixed with organic resin and molybdenumdisulphide composition.
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| CN201410462375.XA CN104264105A (en) | 2014-09-12 | 2014-09-12 | Surface treatment method of precision screw |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410462375.XA CN104264105A (en) | 2014-09-12 | 2014-09-12 | Surface treatment method of precision screw |
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| CN104264105A true CN104264105A (en) | 2015-01-07 |
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| CN201410462375.XA Pending CN104264105A (en) | 2014-09-12 | 2014-09-12 | Surface treatment method of precision screw |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105463475A (en) * | 2015-12-15 | 2016-04-06 | 石家庄三环阀门股份有限公司 | Corrosion resistance method of bimetal corrugated expansion joint |
| CN108080234A (en) * | 2017-12-14 | 2018-05-29 | 常州北川机械制造有限公司 | A kind of safety belt takes up the process of surface treatment of device impact steel ball |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0972467A (en) * | 1995-09-05 | 1997-03-18 | Nippon Steel Corp | Threaded joint with excellent seizure resistance under no grease lubrication |
| CN1159851A (en) * | 1994-10-04 | 1997-09-17 | 新日本制铁株式会社 | Steel pipe joint having high galling resistance and surface treatment method thereof |
| CN101035630A (en) * | 2004-08-03 | 2007-09-12 | 坎梅陶尔股份有限公司 | Process for coating metallic surfaces with an anti-corrosive coating |
-
2014
- 2014-09-12 CN CN201410462375.XA patent/CN104264105A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1159851A (en) * | 1994-10-04 | 1997-09-17 | 新日本制铁株式会社 | Steel pipe joint having high galling resistance and surface treatment method thereof |
| JPH0972467A (en) * | 1995-09-05 | 1997-03-18 | Nippon Steel Corp | Threaded joint with excellent seizure resistance under no grease lubrication |
| CN101035630A (en) * | 2004-08-03 | 2007-09-12 | 坎梅陶尔股份有限公司 | Process for coating metallic surfaces with an anti-corrosive coating |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105463475A (en) * | 2015-12-15 | 2016-04-06 | 石家庄三环阀门股份有限公司 | Corrosion resistance method of bimetal corrugated expansion joint |
| CN105463475B (en) * | 2015-12-15 | 2018-08-21 | 石家庄三环阀门股份有限公司 | A kind of corrosion resistant etching method of bimetallic bellow-type expansion joint |
| CN108080234A (en) * | 2017-12-14 | 2018-05-29 | 常州北川机械制造有限公司 | A kind of safety belt takes up the process of surface treatment of device impact steel ball |
| CN108080234B (en) * | 2017-12-14 | 2021-01-15 | 常州北川机械制造有限公司 | Surface treatment process of steel ball for impact of safety belt winding device |
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Application publication date: 20150107 |