CN1049036A - A kind of on the metal working cutter chromed method and the metal working cutter of chromium layer is arranged - Google Patents
A kind of on the metal working cutter chromed method and the metal working cutter of chromium layer is arranged Download PDFInfo
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- CN1049036A CN1049036A CN 89105937 CN89105937A CN1049036A CN 1049036 A CN1049036 A CN 1049036A CN 89105937 CN89105937 CN 89105937 CN 89105937 A CN89105937 A CN 89105937A CN 1049036 A CN1049036 A CN 1049036A
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- metal working
- cutter
- working cutter
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- chromium
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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
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/04—Electroplating: Baths therefor from solutions of chromium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
The present invention relates to a kind of on the metal working cutter chromed method.Through the metal working cutter of conventional pre-treatment, be chromic anhydride 120-180 grams per liter, sulfuric acid 1.1-2.0 grams per liter, trivalent chromium 5-8 grams per liter at prescription; In anodic current density is 60-120 peace/decimetre
2, temperature is to electroplate 3-12 minute the method for carrying out conventional aftertreatment at last under 45-50 ℃ the condition.The metal working cutter that the chromium layer is arranged is characterized in that metal working cutter working face has the chromium layer below 10 microns, and this metal working cutter has the hardness height, the characteristics of long service life.
Description
The invention belongs to field of metal surface treatment, the metal working cutter that the chromium layer is arranged that particularly relates to the chromed a kind of method of tool surface such as metal working cutter such as file, broaching tool, reamer, screw tap and obtain with this method.
Surface treatment, particularly metal finishing be one very useful, also be the practical technique of popularizing very much, our ancestors have just found and can fine grasps and utilize this technology before more than 1,000 years.Electroplating the history in existing more than 100 year, is a kind of electro-chemical machining technology of decorating protection and obtaining some new performance, and it has very wide range of application.1900 ℃ of the fusing points of chromium, hardness (HB) 800-1000.Chromium is very stable in malaria.These characteristics of chromium make it industrial, particularly on the electroplating industry important status are arranged.Experiment about the chromium electrolytic deposition will be traced back to eighties of last century, and hard chrome plating, spongy chromium plating are for a long time just to be achieved later in World War II.We can see now has many parts such as engine cylinder, bent axle etc. all to be coated with the chromium layer for improving its wear resistance and hardness.But just chromium plating once had report abroad on general metal working cutter such as file, broaching tool, reamer, screw tap etc., and domestic then be blank.And be that so-called Sargenl plating bath is chromic anhydride 250 grams per liters with regard to solution composition as the decoration chrome plating reference liquid, sulfuric acid 2.5 grams per liters; Plating bath chromic anhydride and vitriolic ratio as other special purpose change between 120/l-80/l.The chromic anhydride content of existing basic, normal, high concentration plating bath is between 50 grams per liters-300 grams per liter.Composition for different its plating baths of workpiece to be plated is different, and the current density of using, and the temperature of plating bath also is specific.That is to say that the variation of each condition in the chrome-plating process all can influence the quality of chromium layer.
Existing metal working cutter generally all adopts T12A steel or W18Cr4v steel alloy, and its durometer level is 56-68HRC, for the different material of cutter employing of different purposes.Defectives such as but these cutters just show the hardness deficiency at the processing rigid alloy as through nitriding processing tool steel, alloy-steel cutter, mould and clamping apparatus etc. the time, wear no resistance, the life-span is short.
Purpose of the present invention be exactly to provide a kind of on the metal working cutter chromed method and a kind of metal working cutter that the chromium layer is arranged.Utilize high rigidity, the high-wearing feature of chromium that the metal working cutter is carried out hard chrome plating, on metal working cutter working face, evenly firmly plate the chromium layer, obtain the metal working cutter of chromium layer, thus improve the metal working cutter hardness, prolong its work-ing life.Because the singularity of metal working cutter, it is significantly different to make that plating bath and chromium plating condition and existing chrome-plated process have, below we will describe the present invention.
The method that the present invention relates to, to the chromed technology of metal working cutter just plate pre-treatment with the plating postprocessing working procedures identical with existing Hard Chromium Plating Technology.Key of the present invention is by gold-plated worker's cutter plating bath chromic anhydride, sulfuric acid, chromic content and current density, temperature condition above-mentioned several conditions comprehensive different from existing method to reach special requirement particularly in passivation, chromium plating operation.Existing chromed hardened processing condition are: chromic anhydride 250-280 grams per liter, sulfuric acid 2.5-2.8 grams per liter, trivalent chromium 3-5 grams per liter; Anodic current density 40-50 peace/decimetre
2, temperature 50-55 ℃, and processing condition provided by the invention are: chromic anhydride 120-180 grams per liter, sulfuric acid 1.1-2.0 grams per liter, trivalent chromium 5-8 grams per liter; Anodic current density 60-120 peace/decimetre
2, temperature 45-50 ℃.Low concentration chromium plating liquid institute chromium coating hardness height, and can adopt bigger anodic current density.Though it is generally acknowledged and adopt the low temperature low current density can obtain that matter is hard, even, the chromium layer of attrition resistant good combination property, rationally adopt can not only obtain high rigidity, high abrasion chromium layer than high current density and comparatively high temps, can improve electroplating velocity simultaneously.Though it is influential to chromium layer outward appearance suitably to increase the concentration of trivalent chromium in plating bath, the hardness of chromium layer is fine, can also suitably improve sedimentation velocity simultaneously.The performance of antianode material and requirement are identical with prior art in the method that just the present invention relates to.Just the electroplating device that uses also can be an existing installation.The inventive method does not have particular requirement to the metal working cutter material, but to general tool steel, all platings of the plain structure iron of charcoal.The present invention during to the plating of metal working cutter the chromium layer thickness be controlled at less than 10 micrometer ranges.
The metal working cutter that the chromium layer is arranged that adopts the inventive method to make is characterized in that metal working cutter working face is coated with the chromium layer of thickness below 10 microns.Its metal working cutter blank is existing metal working cutter or only quenches through former technology or be the metal working cutter base of HPC45-58 to hardness.The metal working tool surface hardness that the chromium layer is arranged that the present invention mentions can reach HPC=70, uses more than the life twice as if comparing to prolong with existing identical metal working cutter.
The following examples will be further described the content that the present invention relates to.What be worth to propose is that the present invention talks the metal working cutter and is not confined to the kind that embodiment is mentioned to.
Embodiment one: a kind of on the metal working cutter chromed method, be chromed method on file concretely.To quenching through technology, hardness is plated pre-treatment at the file base of HPC45-48, carries out chromium plating then in chromium plating liquid at first according to a conventional method.The prescription of chromium plating liquid is: chromic anhydride 160 grams per liters, sulfuric acid 1.5 grams per liters, trivalent chromium 7 grams per liters.The plating condition is controlled to be: anodic current density 100 peace/decimetres
2, bath temperature is controlled at 48 ± 1 ℃.Electroplated under these conditions 3-12 minute, the best is 8 minutes, afterwards according to a conventional method to the file that plates the chromium layer clean, operation such as dehydrogenation.
Embodiment two: a kind of working face has the file of chromium layer, and one deck chromium is closely arranged on the file working face equably, and its thickness is greater than 10 microns.Surface hardness is HPC-70.This file is being more than 3 times of common file on work-ing life not only, and use range is wide, both has been applicable to the metal that filing hardness is higher, is applicable to that again filing is than soft metal such as copper, lead, tin etc.
Claims (5)
1, a kind of on the metal working cutter chromed method, comprise conventional pre-treatment and aftertreatment to the metal working cutter, it is characterized in that the metal working cutter at prescription is: chromic anhydride 120-180 grams per liter, in the plating bath of sulfuric acid 1.1-2.0 grams per liter, trivalent chromium 5-8 grams per liter, at anodic current density 60-120 peace/decimetre, temperature is to electroplate 3-12 minute under the 45-50 ℃ of condition.
2, the method for claim 1 is characterized in that the metal working cutter at prescription is: chromic anhydride 160 grams per liters in the plating bath of sulfuric acid 1.5 grams per liters, trivalent chromium 7 grams per liters, are 100 peace/decimetres in anodic current density, electroplate 8 minutes under the condition that temperature is 45 ± 1 ℃
3, method as claimed in claim 1 or 2, the blank that it is characterized in that the metal working cutter can be existing common metal working cutters, also can be only to be quenched into the cutter base that hardness is HP C45-58 through former technology
4, a kind of metal working cutter that the chromium layer is arranged is characterized in that having on the metal working cutter working face layer thickness less than 10 microns chromium layer
5, metal working cutter as claimed in claim 4, the material that it is characterized in that the metal working cutter can be the general tool steel, also can the plain structure iron of charcoal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89105937 CN1049036A (en) | 1989-07-25 | 1989-07-25 | A kind of on the metal working cutter chromed method and the metal working cutter of chromium layer is arranged |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89105937 CN1049036A (en) | 1989-07-25 | 1989-07-25 | A kind of on the metal working cutter chromed method and the metal working cutter of chromium layer is arranged |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1049036A true CN1049036A (en) | 1991-02-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89105937 Pending CN1049036A (en) | 1989-07-25 | 1989-07-25 | A kind of on the metal working cutter chromed method and the metal working cutter of chromium layer is arranged |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1049036A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102782192A (en) * | 2010-01-08 | 2012-11-14 | 上村工业株式会社 | Chromium plating method |
-
1989
- 1989-07-25 CN CN 89105937 patent/CN1049036A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102782192A (en) * | 2010-01-08 | 2012-11-14 | 上村工业株式会社 | Chromium plating method |
| CN102782192B (en) * | 2010-01-08 | 2015-09-09 | 上村工业株式会社 | Chrome-plating method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |