CN101839340A - Piston ring and surface spongy tin plating technique thereof - Google Patents
Piston ring and surface spongy tin plating technique thereof Download PDFInfo
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- CN101839340A CN101839340A CN200910272826A CN200910272826A CN101839340A CN 101839340 A CN101839340 A CN 101839340A CN 200910272826 A CN200910272826 A CN 200910272826A CN 200910272826 A CN200910272826 A CN 200910272826A CN 101839340 A CN101839340 A CN 101839340A
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- Prior art keywords
- piston ring
- porosity
- tank liquor
- time
- zinc
- Prior art date
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- 238000007747 plating Methods 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 25
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 239000011651 chromium Substances 0.000 claims abstract description 71
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 61
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 60
- 238000005406 washing Methods 0.000 claims abstract description 36
- 238000005530 etching Methods 0.000 claims abstract description 11
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims abstract description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 108
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 72
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 53
- 239000004576 sand Substances 0.000 claims description 49
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 36
- 150000003839 salts Chemical class 0.000 claims description 32
- 238000005238 degreasing Methods 0.000 claims description 30
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 27
- 239000007788 liquid Substances 0.000 claims description 25
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims description 22
- 239000011734 sodium Substances 0.000 claims description 22
- 238000005554 pickling Methods 0.000 claims description 21
- 238000006356 dehydrogenation reaction Methods 0.000 claims description 20
- 238000005282 brightening Methods 0.000 claims description 18
- 239000003795 chemical substances by application Substances 0.000 claims description 18
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 18
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 18
- 239000011248 coating agent Substances 0.000 claims description 13
- 238000000576 coating method Methods 0.000 claims description 13
- 238000005488 sandblasting Methods 0.000 claims description 12
- 238000005498 polishing Methods 0.000 claims description 10
- 239000002253 acid Substances 0.000 claims description 9
- 239000003995 emulsifying agent Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 9
- RCIVOBGSMSSVTR-UHFFFAOYSA-L stannous sulfate Chemical compound [SnH2+2].[O-]S([O-])(=O)=O RCIVOBGSMSSVTR-UHFFFAOYSA-L 0.000 claims description 9
- 229910000375 tin(II) sulfate Inorganic materials 0.000 claims description 9
- 229910019142 PO4 Inorganic materials 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000001488 sodium phosphate Substances 0.000 claims description 4
- 229910000162 sodium phosphate Inorganic materials 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000003921 oil Substances 0.000 abstract description 16
- 238000002485 combustion reaction Methods 0.000 abstract description 6
- 239000007789 gas Substances 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 abstract 1
- 239000010687 lubricating oil Substances 0.000 abstract 1
- 239000000779 smoke Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 10
- 238000004140 cleaning Methods 0.000 description 7
- 239000007921 spray Substances 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- 239000004744 fabric Substances 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000009940 knitting Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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Abstract
The invention relates to a piston ring and a surface spongy tin plating technique thereof. The technical scheme thereof is as follows: the surface of a piston ring body is provided with a chromium plating layer, the outer surface of the chromium plating layer is provided with a spongy reticulate pattern, and the outer surface of the spongy reticulate pattern is provided with a tin plating layer. The invention comprises the following procedures: preplating, etching, chromium plating, washing, removal of hydrogen, hole loosing, washing and drying and tin plating treatment. The invention utilizes a reticulate pattern groove on the surface of the piston ring to store lubricating oil, thus greatly reducing the friction coefficient between the piston ring and a cylinder sleeve, improving oil absorbing property, and prolonging the service life of the piston ring and the cylinder sleeve; and compared with the prior art, the invention prolongs the service life of the piston ring and the cylinder sleeve by more than three thousand hours, improves the power of an internal combustion engine by more than 30 percent, saves oil by 25 percent, is capable of reducing the exhaust amount of gas/smoke of the internal combustion engine, reduces the environment requirements of atmosphere pollution, solves the mechanical wear of the piston ring during running-in period and obtains more perfect use performances.
Description
Technical field
The present invention relates to a kind of internal-combustion engine piston ring.The invention still further relates to the two kinds of zinc-plated technologies of the lip-deep porosity of different metal in piston ring surface
Background technique
Piston ring is one of internal-combustion engine vital part, and the quality of piston ring performance characteristic directly influences the performance of motor, it major function be to seal, heat conduction, evenly distribute lubricant oil and support piston.Piston ring moves reciprocatingly in cylinder in company with piston, be one of worst parts of operating conditions in the motor, and the life-span is the shortest.Characteristics are, operating temperature high and under very high mechanical load high-speed slide, suffer strong wear.The performance that improves piston ring is the key that concerns the engine operation performance, hard chromium plating on the working surface of piston ring, though can improve surface hardness and wear resistance, piston ring heat conduction in cylinder sleeve is slow, and the uneven shortcoming of cloth oil is the technical task that needs to be resolved hurrily.
No longer carry out other surface treatment mode, piston ring hard chromium plating behind the present internal-combustion engine piston ring surface treatment hard chromium plating both domestic and external and can improve its surface hardness and wear resistance, but situation is unsatisfactory, zinc-plated again behind the piston ring excircle face spongy chromium plating, the tin layer that is plated can reduce the friction factor of piston ring and cylinder sleeve greatly, improves the working life of fastness.
Summary of the invention
The object of the invention be to provide a kind of wear-resistant, cloth oily evenly, improve heat-conducting property, obviously improve the product usability, can lower energy consumption again, improve the piston ring of environmental protection efficacy.
The object of the invention also is to provide the surface spongy tin plating technique thereof of above-mentioned piston ring, and this technology rationally is convenient to operation, can obviously improve the product usability, can lower energy consumption again, improves environmental protection efficacy.
Technological scheme of the present invention is: on the surface of piston ring body one chromium coating is arranged, the outer surface of chromium coating has the porosity reticulate pattern, and the outer surface of porosity reticulate pattern has tin coating.
The surface spongy chromium plating technique of above-mentioned piston ring comprises: operation before the plating: with embracing round watt piston is encircled circle, compressed with mandrel, seal with sealing rubber, the cylindrical polishing face is to guarantee to have the surface of good roughness, before going into plating tank, use the sandblasting machine sand blast, insert then in 60 ℃～70 ℃ the clear water and wash; Etching procedure: above-mentioned piston ring is inserted etching in the etching tank liquor;
Etching tank liquor prescription: chromic anhydride CrO
3180～200g/L;
Sulfuric acid H
2SO
41.8～2.2g/L;
Current density: 32A/dm
2
Temperature: 58～62 ℃
Time: 20～40s
Chromium plating operation: will insert chromium plating in the hard chromium plating tank liquor from the piston ring of etching procedure;
Hard chromium plating tank liquor composition and process specification
Chromic anhydride CrO
3200～220g/L
Sulfuric acid H
2SO
42.2～2.7g/L
Acid is than (CrO
3/ SO
4 2-) 100/1.2
Temperature: 58～60 ℃
Current density: 40～55A/dm
2
Time: 2.4～6.0h
Washing step: the piston ring behind the hard chromium plating inserted in 60～70 ℃ the clear water and wash;
Dehydrogenation operation: the piston ring after the washes clean is put into the baking oven dehydrogenation;
Temperature: 200～220 ℃
Time: 3～4h
Porosity operation: the piston ring after the above-mentioned operation inserted carry out porosity in the porosity tank liquor;
Porosity tank liquor composition and process specification:
Sodium hydroxide NaOH 30～50g/L
Sodium carbonate Na
2CO
320～30g/L
Sodium phosphate Na
3PO4 5～10g/L
Current density: 20～30A/dm
2
PH value 12～13.5
The sandblast operation: the piston ring behind the porosity carries out sand blast;
Workpiece rotational frequency: 36rpm
Sand jet outlet travelling speed 0.28m/min
Sand grains order number: 220～280 orders
Sandblast initial velocity: 280～320m/s
Equipment: cylindrical sandblasting machine
Workpiece rotational frequency: 36rpm
Sand jet outlet travelling speed 0.28m/min
Sand grains order number: 220～320 orders
Sandblast initial velocity: 280～320m/s
The sandblast time: 2～3min
The electrolytic degreasing operation: the piston ring after the sand blast is carried out electrolytic degreasing, and the prescription of electrolytic degreasing tank liquor is:
Sodium hydroxide NaOH 35～55g/L
Sodium carbonate Na
2CO
312～18g/L
Sodium phosphate Na
3PO4 5～10g/L
OP-10 emulsifier 2～4g/L
Remove 50～60 ℃ of oil temperatures
Washing step: the piston ring behind the electrolytic degreasing is inserted in the clear water and is washed;
Salt pickling operation: the piston ring after the washing is inserted and is carried out the salt pickling in the salt descaling bath liquid:
32% hydrochloric acid is pressed 1 (HCl): 2 (H
2O)
Normal temperature salt is washed 1～3min
Washing step: the piston ring after the salt pickling is inserted in the clear water once more and is washed;
Sulfuric acid is washed operation: will insert in the sulfuric acid washing trough liquid from the piston ring of last operation, and washing,
5%H
2SO
4Sulfuric acid is washed 1～3min;
Washing step: the piston ring after sulfuric acid is washed is inserted in the clear water once more and is washed;
Zinc-plated treating process: carry out zinc-plated processing then, the tank liquor prescription and the process specification of zinc-plated processing:
Stannous sulfate 150～180g/L
Sulfuric acid 50～85g/L
SS-820 brightening agent 15mg/L
SS82 brightening agent 2mg/L
Cathode-current density 5～8A/dm
2
Zinc-plated time 15～25min.
The technological principle flow process: washing → zinc-plated → mobile washing → hot blast drying is washed → flowed to the plating pretreatment → chromium plating → washing → dehydrogenation → machining → porosity → sandblast → electrolytic degreasing → washing → salt pickling of the flowing → washing → sulfuric acid that flows.
The equipment of implementing the inventive method comprises embraces circular knitting machine, nylon buffing machine, transport airplane or lifting appliance, sandblasting machine, rotation chrome plating equipment, rotation tin equipment, baking oven and relevant supplementary equipment.Implement equipment of the present invention and need be conventional electroplating device.
The present invention utilizes the tin coating on piston ring surface, greatly reduces the friction factor of piston ring and cylinder sleeve, is improving oiliness, solves the break-in of piston ring initial stage, improves piston ring working life.
The present invention compared with prior art has following good effect:
1. can improve working environment and the product usability of piston in cylinder sleeve economical, easily, reduce the friction factor of piston ring and cylinder sleeve, wear-resistant, the working life of improving piston ring.
2. cloth oil evenly.Utilize piston ring surface chromium layer reticulate pattern groove, store lubricant oil, can more uniform distribution lubricant oil in the motion repeatedly of piston ring.
3. can cut down the consumption of energy greatly, and can reach environmental requirement.
4. raising heat-conducting property reduces the temperature of fastness.
The present invention is in order to solve the initial fitting property energy and the sealability of piston ring, on the basis of spongy chromium plating, applies tin coating on the porosity reticulate pattern of the piston ring of piston ring, solved the mechanical wear of piston ring running-in period, to obtain more intact usability.Reach more than 45% the working life that the present invention has improved piston ring and cylinder liner compared to prior art, improves power of IC engine more than 30%, fuel-efficient up to 25%, can reduce the exhaust/cigarette amount of internal-combustion engine, reduces the environmental requirement of pollution of atmosphere.
Description of drawings
Accompanying drawing is a structural representation of the present invention.
Embodiment
In the accompanying drawing, on the surface of piston ring 1 body one chromium coating 2 is arranged, the outer surface of chromium coating 2 has porosity reticulate pattern 3, and the outer surface of porosity reticulate pattern 3 has tin coating 4.The thickness of chromium coating is 0.014～0.016mm, the tin coating degree of depth 0.002～0.006mm.
Get some piston rings and piston is encircled circle, compressed, guarantee that two end faces of piston ring are tightly fitted, seal the cylindrical polishing face to guarantee that the surface of good roughness is arranged, before going into plating tank, use the sandblasting machine sand blast with sealing rubber with mandrel with embracing round watt.Insert then in 60 ℃ the clear water and wash.Insert at last and carry out chromium plating in the chromium plating tank liquor of following prescription:
Chromic anhydride CrO
3: 200g/L; Sulfuric acid H
2SO
4: 2.2g/L; Trivalent chromium (Cr
3+): 3.0g/L; Acid is than (CrO
3/ SO
4 2-): 100/1.2; Current density: 40A/dm
2Tank liquor temperature: 58 ℃; Be subjected to plating time: 2.4h.
Take out piston ring from the chromium plating tank liquor, put in 60 ℃ the water and clean, put into equipment after cleaning up: 200 ℃ of baking oven dehydrogenations, the dehydrogenation time is 3h.Then piston ring is returned machine shop and carry out processing such as radial thickness and bucket face degree, guarantee to satisfy the size requirement of product figure to the piston ring in this step.
The piston ring that processing is put in place carries out the porosity processing, and porosity treatment trough formula of liquid is: sodium hydroxide (NaOH): 30g/L; Sodium carbonate (Na
2CO
3): 20g/L; Sodium phosphate (Na
3PO4): 5g/L; PH value is: 12; The porosity time is: 2min.Piston ring behind the porosity carries out sand blast, and the sand jet outlet travelling speed is 0.28m/min, and sand grains order number is 320, and sand grains initial velocity is 280m/s, and the sandblast time is 2min.
Piston ring after the sand blast is carried out electrolytic degreasing, and the prescription of electrolytic degreasing tank liquor is: sodium hydroxide (NaOH): 35g/L; Sodium carbonate (Na
2CO
3): 20g/L; Sodium phosphate (Na
3PO4): 5g/L; OP-10 emulsifier: 2.0g/L; The oil removing time: 2min.Piston ring behind the electrolytic degreasing inserted in 60 ℃ the clear water and wash.32% hydrochloric acid of inserting normal temperature immediately is by 1 (HCl): 2 (H
2O) carry out the salt pickling in the salt descaling bath liquid, the salt pickling time is 1min.And then insert in 60 ℃ the clear water and wash.
Piston ring after the above-mentioned operation is inserted 5%H
2SO
4In the sulfuric acid washing trough liquid, washing 2min inserts again in the clear water that flows and washs.Carry out zinc-plated processing then, the tank liquor prescription of zinc-plated processing is:
Technology (tank liquor) prescription: stannous sulfate (SnSO
4) 150g/L
Sulfuric acid (H
2SO
4) 50g/L
SS-820 brightening agent 15mg/L
SS82 brightening agent 2mg/L
Tank liquor environment: cathode-current density 5A/dm
2
The temperature room temperature
Zinc-plated time 15mm
Piston ring after the zinc-plated processing inserted in 60 ℃ the clear water and wash, the final step of operation is handled for oven dry, and the piston ring after zinc-plated is inserted toast roasting temperature in the conventional baking oven: 85 ℃, stoving time is 5mm.
Get some piston rings and piston is encircled circle, compressed, guarantee that two end faces of piston ring are tightly fitted, seal the cylindrical polishing face to guarantee that the surface of good roughness is arranged, before going into plating tank, use the sandblasting machine sand blast with sealing rubber with mandrel with embracing round watt.Insert then in 65 ℃ the clear water and wash.Insert after drying and carry out chromium plating in the chromium plating tank liquor of following prescription:
Chromic anhydride CrO
3: 210g/L; Sulfuric acid H
2SO
4: 2.2g/L; Trivalent chromium (Cr
3+): 3.2g/L; Acid is than (CrO
3/ SO
4 2-): 100/1.2; Current density: 42A/dm
2Tank liquor temperature: 58 ℃; Be subjected to plating time: 2.4h.
Take out piston ring from the chromium plating tank liquor, the water of putting into 65 ℃ cleans, and puts into equipment after cleaning up: 200 ℃ of baking oven dehydrogenations, the dehydrogenation time is 3.2h.Then piston ring is returned machine shop and carry out processing such as radial thickness and bucket face degree, guarantee to satisfy the size requirement of product figure to the piston ring in this step.
The piston ring that processing is put in place carries out the porosity processing, and porosity treatment trough formula of liquid is: sodium hydroxide (NaOH): 34g/L; Sodium carbonate (Na
2CO
3): 22g/L; Sodium phosphate (Na
3PO4): 7g/L; PH value is: 12.3; The porosity time is: 2.4min.Piston ring behind the porosity carries out sand blast, and the sand jet outlet travelling speed is 0.28m/min, and sand grains order number is 220, and sand grains initial velocity is 290m/s, and the sandblast time is 3min.
Piston ring after the sand blast is carried out electrolytic degreasing, and the prescription of electrolytic degreasing tank liquor is: sodium hydroxide (NaOH): 38g/L; Sodium carbonate (Na
2CO
3): 14g/L; Sodium phosphate (Na
3PO4): 8g/L; OP-10 emulsifier: 2.1g/L; The oil removing time: 2.4min.Piston ring behind the electrolytic degreasing inserted in 65 ℃ the clear water and wash.32% hydrochloric acid of inserting normal temperature immediately is by 1 (HCl): 2 (H
2O) carry out the salt pickling in the salt descaling bath liquid, the salt pickling time is 1min.And then insert in 65 ℃ the clear water and wash.
Piston ring after the above-mentioned operation is inserted 5%H
2SO
4In the sulfuric acid washing trough liquid, washing 1.5min inserts again in the clear water that flows and washs.Carry out zinc-plated processing then, the tank liquor prescription of zinc-plated processing is:
Technology (tank liquor) prescription: stannous sulfate (SnSO
4) 155g/L
Sulfuric acid (H
2SO
4) 55g/L
SS-820 brightening agent 15mg/L
SS82 brightening agent 2.5mg/L
Tank liquor environment: cathode-current density 6A/dm
2
The temperature room temperature
Zinc-plated time 18min
Piston ring after the zinc-plated processing inserted in 65 ℃ the clear water and wash, the final step of operation is handled for oven dry, and the piston ring after zinc-plated is inserted toast roasting temperature in the conventional baking oven: 85 ℃, stoving time is 6min.
Get some piston rings and piston is encircled circle, compressed, guarantee that two end faces of piston ring are tightly fitted, seal the cylindrical polishing face to guarantee that the surface of good roughness is arranged, before going into plating tank, use the sandblasting machine sand blast with sealing rubber with mandrel with embracing round watt.Insert then in 65 ℃ the clear water and wash.Insert after drying and carry out chromium plating in the chromium plating tank liquor of following prescription:
Chromic anhydride CrO
3: 210g/L; Sulfuric acid H
2SO
4: 2.4g/L; Trivalent chromium (Cr
3+): 3.4g/L; Acid is than (CrO
3/ SO
4 2-): 100/1.2; Current density: 45A/dm
2Tank liquor temperature: 60 ℃; Be subjected to plating time: 2.6h.
Take out piston ring from the chromium plating tank liquor, the water of putting into 70 ℃ cleans, and puts into equipment after cleaning up: 200 ℃ of baking oven dehydrogenations, the dehydrogenation time is 3.4h.Then piston ring is returned machine shop and carry out processing such as radial thickness and bucket face degree, guarantee to satisfy the size requirement of product figure and technology to the piston ring in this step.
The piston ring that processing is put in place carries out the porosity processing, and porosity treatment trough formula of liquid is: sodium hydroxide (NaOH): 36g/L; Sodium carbonate (Na
2CO
3): 24g/L; Sodium phosphate (Na
3PO4): 7.5g/L; PH value is: 12.3; The porosity time is: 2.6min.Piston ring behind the porosity sprays processing, and the sand jet outlet travelling speed is 0.28m/min, and sand grains order number is 220, and sand grains initial velocity is 320m/s, and the sandblast time is 2.5min.
Piston ring after the sand blast is carried out electrolytic degreasing, and the prescription of electrolytic degreasing tank liquor is: sodium hydroxide (NaOH): 40g/L; Sodium carbonate (Na
2CO
3): 16g/L; Sodium phosphate (Na
3PO4): 8.2g/L; OP-10 emulsifier: 2.2g/L; The oil removing time: 2.4min.Piston ring behind the electrolytic degreasing inserted in 70 ℃ the clear water and wash.32% hydrochloric acid of inserting normal temperature immediately is by 1 (HCl): 2 (H
2O) carry out the salt pickling in the salt descaling bath liquid, the salt pickling time is 1min.And then insert in 70 ℃ the clear water and wash.
Piston ring after the above-mentioned operation is inserted 5%H
2SO
4In the sulfuric acid washing trough liquid, washing 2min inserts again in the clear water that flows and washs.Carry out zinc-plated processing then, the tank liquor prescription of zinc-plated processing is:
Technology (tank liquor) prescription: stannous sulfate (SnSO
4) 158g/L
Sulfuric acid (H
2SO
4) 58g/L
SS-820 brightening agent 18mg/L
SS82 brightening agent 2.7mg/L
Tank liquor environment: cathode-current density 6.2A/dm
2
The temperature room temperature
Zinc-plated time 18min
Piston ring after the zinc-plated processing put in 70 ℃ the clear water and wash, the final step of operation is handled for oven dry, and the piston ring after zinc-plated is inserted toast roasting temperature in the conventional baking oven: 85 ℃, stoving time is 6.2min.
Get some piston rings and piston is encircled circle, compressed, guarantee that two end faces of piston ring are tightly fitted, seal the cylindrical polishing face to guarantee that the surface of good roughness is arranged, before going into plating tank, use the sandblasting machine sand blast with sealing rubber with mandrel with embracing round watt.Insert then in 65 ℃ the clear water and wash.Insert after drying and carry out chromium plating in the chromium plating tank liquor of following prescription:
Chromic anhydride CrO
3: 220g/L; Sulfuric acid H
2SO
4: 2.6g/L; Trivalent chromium (Cr
3+): 3.3g/L; Acid is than (CrO
3/ SO
4 2-): 100/1.2; Current density: 46A/dm
2Tank liquor temperature: 60 ℃; Be subjected to plating time: 2.5h.
Take out piston ring from the chromium plating tank liquor, the water of putting into 70 ℃ cleans, and puts into equipment after cleaning up: 200 ℃ of baking oven dehydrogenations, the dehydrogenation time is 3.4h.Then piston ring is returned machine shop and carry out processing such as radial thickness and bucket face degree, guarantee to satisfy the size requirement of product figure to the piston ring in this step.
The piston ring that processing is put in place carries out the porosity processing, and porosity treatment trough formula of liquid is: sodium hydroxide (NaOH): 36g/L; Sodium carbonate (Na
2CO
3): 24g/L; Sodium phosphate (Na
3PO4): 7.8g/L; PH value is: 12.5; The porosity time is: 2.5min.Piston ring behind the porosity sprays processing, and the sand jet outlet travelling speed is 0.28m/min, and sand grains order number is 220～320, and sand grains initial velocity is 280～320m/s, and the sandblast time is 2～3min.
Piston ring after the sand blast is carried out electrolytic degreasing, and the prescription of electrolytic degreasing tank liquor is: sodium hydroxide (NaOH): 40g/L; Sodium carbonate (Na
2CO
3): 18g/L; Sodium phosphate (Na
3PO4): 8g/L; OP-10 emulsifier: 2.2g/L; The oil removing time: 2.5min.Piston ring behind the electrolytic degreasing inserted in 70 ℃ the clear water and wash.32% hydrochloric acid of inserting normal temperature immediately is by 1 (HCl): 2 (H
2O) carry out the salt pickling in the salt descaling bath liquid, the salt pickling time is 1min.And then insert in 70 ℃ the clear water and wash.
Piston ring after the above-mentioned operation is inserted 5%H
2SO
4In the sulfuric acid washing trough liquid, washing 2.5min inserts again in the mobile clear water and washs.Carry out zinc-plated processing then, the tank liquor prescription of zinc-plated processing is:
Technology (tank liquor) prescription: stannous sulfate (SnSO
4) 165g/L
Sulfuric acid (H
2SO
4) 60g/L
SS-820 brightening agent 13mg/L
SS82 brightening agent 2.7mg/L
Tank liquor environment: cathode-current density 6.8A/dm
2
The temperature room temperature
Zinc-plated time 20min
Piston ring after the zinc-plated processing inserted in 70 ℃ the clear water and wash, the final step of operation is handled for oven dry, and the piston ring after zinc-plated is inserted toast roasting temperature in the conventional baking oven: 85 ℃, stoving time is 6min.
Embodiment 5
Get some piston rings and piston is encircled circle, compressed, guarantee that two end faces of piston ring are tightly fitted, seal the cylindrical polishing face to guarantee that the surface of good roughness is arranged, before going into plating tank, use the sandblasting machine sand blast with sealing rubber with mandrel with embracing round watt.Insert then in 65 ℃ the clear water and wash.Insert after drying and carry out chromium plating in the chromium plating tank liquor of following prescription:
Chromic anhydride CrO
3: 220g/L; Sulfuric acid H
2SO
4: 2.8g/L; Trivalent chromium (Cr
3+): 3.5g/L; Acid is than (CrO
3/ SO
4 2-): 100/1.2; Current density: 48A/dm
2Tank liquor temperature: 70 ℃; Be subjected to plating time: 2.6h.
Take out piston ring from the chromium plating tank liquor, the water of putting into 70 ℃ cleans, and puts into equipment after cleaning up: 200 ℃ of baking oven dehydrogenations, the dehydrogenation time is 3.2h.Then piston ring is returned machine shop and carry out processing such as radial thickness and bucket face degree, guarantee to satisfy the size requirement of product figure to the piston ring in this step.
The piston ring that processing is put in place carries out the porosity processing, and porosity treatment trough formula of liquid is: sodium hydroxide (NaOH): 36g/L; Sodium carbonate (Na
2CO
3): 26g/L; Sodium phosphate (Na
3PO4): 8.0g/L; PH value is: 12.3; The porosity time is: 2.8min.Piston ring behind the porosity sprays processing, and the sand jet outlet travelling speed is 0.28m/min, and sand grains order number is 220～320, and sand grains initial velocity is 280～320m/s, and the sandblast time is 2～3min.
Piston ring after the sand blast is carried out electrolytic degreasing, and the prescription of electrolytic degreasing tank liquor is: sodium hydroxide (NaOH): 42g/L; Sodium carbonate (Na
2CO
3): 20g/L; Sodium phosphate (Na
3PO4): 8.5g/L; OP-10 emulsifier: 2.3g/L; The oil removing time: 2.7min.Piston ring behind the electrolytic degreasing inserted in 70 ℃ the clear water and wash.32% hydrochloric acid of inserting normal temperature immediately is by 1 (HCl): 2 (H
2O) carry out the salt pickling in the salt descaling bath liquid, the salt pickling time is 2min.And then insert in 70 ℃ the clear water and wash.
Piston ring after the above-mentioned operation is inserted 5%H
2SO
4In the sulfuric acid washing trough liquid, washing 2.5min inserts again in the clear water that flows and washs.Carry out zinc-plated processing then, the tank liquor prescription of zinc-plated processing is:
Technology (tank liquor) prescription: stannous sulfate (SnSO
4) 170g/L
Sulfuric acid (H
2SO
4) 65g/L
SS-820 brightening agent 12mg/L
SS82 brightening agent 2.5mg/L
Tank liquor environment: cathode-current density 7.0A/dm
2
The temperature room temperature
Zinc-plated time 22min
Piston ring after the zinc-plated processing inserted in 70 ℃ the clear water and wash, the final step of operation is handled for oven dry, and the piston ring after zinc-plated is inserted toast roasting temperature in the conventional baking oven: 85 ℃, stoving time is 6.5mm.
Embodiment 6
Get some piston rings and piston is encircled circle, compressed, guarantee that two end faces of piston ring are tightly fitted, seal the cylindrical polishing face to guarantee that the surface of good roughness is arranged, before going into plating tank, use the sandblasting machine sand blast with sealing rubber with mandrel with embracing round watt.Insert then in 70 ℃ the clear water and wash.Insert after drying and carry out chromium plating in the chromium plating tank liquor of following prescription:
Chromic anhydride CrO
3: 240g/L; Sulfuric acid H
2SO
4: 3.0g/L; Trivalent chromium (Cr
3+): 3.8g/L; Acid is than (CrO
3/ SO
4 2-): 100/1.2; Current density: 50A/dm
2Tank liquor temperature: 70 ℃; Be subjected to plating time: 2.8h.
From the chromium plating tank liquor, take out piston ring, put in 70 ℃ the water and clean, put into equipment after cleaning up:
Dehydrogenation in 200 ℃ of baking ovens, the dehydrogenation time is 3.4h.Then piston ring is returned machine shop and carry out processing such as radial thickness and bucket face degree, guarantee to satisfy the size requirement of product figure to the piston ring in this step.
The piston ring that processing is put in place carries out the porosity processing, and porosity treatment trough formula of liquid is: sodium hydroxide (NaOH): 38g/L; Sodium carbonate (Na
2CO
3): 28g/L; Sodium phosphate (Na
3PO4): 8.2g/L; PH value is: 12.5; The porosity time is: 3.0min.Piston ring behind the porosity sprays processing, and the sand jet outlet travelling speed is 0.28m/min, and sand grains order number is 220～320, and sand grains initial velocity is 280～320m/s, and the sandblast time is 2～3min.
Piston ring after the sand blast is carried out electrolytic degreasing, and the prescription of electrolytic degreasing tank liquor is: sodium hydroxide (NaOH): 44g/L; Sodium carbonate (Na
2CO
3): 22g/L; Sodium phosphate (Na
3PO4): 8.8g/L; OP-10 emulsifier: 2.5g/L; The oil removing time: 2.5min.Piston ring behind the electrolytic degreasing inserted in 70 ℃ the clear water and wash.32% hydrochloric acid of inserting normal temperature immediately is by 1 (HCl): 2 (H
2O) carry out the salt pickling in the salt descaling bath liquid, the salt pickling time is 2.5min.And then insert in 70 ℃ the clear water and wash.
Piston ring after the above-mentioned operation is inserted 5%H
2SO
4In the sulfuric acid washing trough liquid, washing 2min inserts again in the mobile clear water and washs.Carry out zinc-plated processing then, the tank liquor prescription of zinc-plated processing is:
Technology (tank liquor) prescription: stannous sulfate (SnSO
4) 175g/L
Sulfuric acid (H
2SO
4) 68g/L
SS-820 brightening agent 14mg/L
SS82 brightening agent 2.5mg/L
Tank liquor environment: cathode-current density 7.5A/dm
2
The temperature room temperature
Zinc-plated time 22min
Piston ring after the zinc-plated processing inserted in 70 ℃ the clear water and wash, the final step of operation is handled for oven dry, and the piston ring after zinc-plated is inserted toast roasting temperature in the conventional baking oven: 85 ℃, stoving time is 6.8min.
Embodiment 7
Get some piston rings and piston is encircled circle, compressed, guarantee that two end faces of piston ring are tightly fitted, seal the cylindrical polishing face to guarantee that the surface of good roughness is arranged, before going into plating tank, use the sandblasting machine sand blast with sealing rubber with mandrel with embracing round watt.Insert then in 70 ℃ the clear water and wash.Insert after drying and carry out chromium plating in the chromium plating tank liquor of following prescription:
Chromic anhydride CrO
3: 240g/L; Sulfuric acid H
2SO
4: 3.2g/L; Trivalent chromium (Cr
3+): 3.9g/L; Acid is than (CrO
3/ SO
4 2-): 100/1.2; Current density: 52A/dm
2Tank liquor temperature: 70 ℃; Be subjected to plating time: 3.0h.
Take out piston ring from the chromium plating tank liquor, the water of putting into 70 ℃ cleans, and puts into equipment after cleaning up: 200 ℃ of baking oven dehydrogenations, the dehydrogenation time is 3.2h.Then piston ring is returned machine shop and carry out processing such as radial thickness and bucket face degree, guarantee to satisfy the size requirement of product figure to the piston ring in this step.
The piston ring that processing is put in place carries out the porosity processing, and porosity treatment trough formula of liquid is: sodium hydroxide (NaOH): 38g/L; Sodium carbonate (Na
2CO
3): 30g/L; Sodium phosphate (Na
3PO4): 8.2g/L; PH value is: 12.5; The porosity time is: 3.0min.Piston ring behind the porosity sprays processing, and the sand jet outlet travelling speed is 0.28m/min, and sand grains order number is 220～320, and sand grains initial velocity is 280～320m/s, and the sandblast time is 2～3min.
Piston ring after the sand blast is carried out electrolytic degreasing, and the prescription of electrolytic degreasing tank liquor is: sodium hydroxide (NaOH): 44g/L; Sodium carbonate (Na
2CO
3): 22g/L; Sodium phosphate (Na
3PO4): 9.2g/L; OP-10 emulsifier: 2.5g/L; The oil removing time: 2.5min.Piston ring behind the electrolytic degreasing inserted in 70 ℃ the clear water and wash.32% hydrochloric acid of inserting normal temperature immediately is by 1 (HCl): 2 (H
2O) carry out the salt pickling in the salt descaling bath liquid, the salt pickling time is 2.8min.And then insert in 70 ℃ the clear water and wash.
Piston ring after the above-mentioned operation is inserted 5%H
2SO
4In the sulfuric acid washing trough liquid, washing 2min inserts again in the mobile clear water and washs.Carry out zinc-plated processing then, the tank liquor prescription of zinc-plated processing is:
Technology (tank liquor) prescription: stannous sulfate (SnSO
4) 180g/L
Sulfuric acid (H
2SO
4) 70g/L
SS-820 brightening agent 14mg/L
SS82 brightening agent 2.5mg/L
Tank liquor environment: cathode-current density 8.0A/dm
2
The temperature room temperature
Zinc-plated time 22min
Piston ring after the zinc-plated processing inserted in 70 ℃ the clear water and wash, the final step of operation is handled for oven dry, and the piston ring after zinc-plated is inserted toast roasting temperature in the conventional baking oven: 85 ℃, stoving time is 7.0min.
Claims (5)
1. piston ring, it is characterized in that: on the surface of piston ring body one chromium coating is arranged, the outer surface of chromium coating has the porosity reticulate pattern, and the outer surface of porosity reticulate pattern has tin coating.
2. the surface spongy tin plating technique thereof of the described piston ring of claim 1, it is characterized in that: comprise the preceding operation of plating: piston is encircled circle with embracing round watt, compressed with mandrel, seal with sealing rubber, the cylindrical polishing face is to guarantee to have the surface of good roughness, before going into plating tank, use the sandblasting machine sand blast, insert then in 60 ℃～70 ℃ the clear water and wash;
Etching procedure: above-mentioned piston ring is inserted etching in the etching tank liquor;
Etching tank liquor prescription: chromic anhydride CrO
3180～200g/L;
Sulfuric acid (H
2SO
4) 1.8～2.2g/L;
Trivalent chromium (Cr
3+) 3～4.5g/L,
Current density: 32A/dm
2
Temperature: 58～62 ℃
Time: 20～40s
Chromium plating operation: will insert chromium plating in the hard chromium plating tank liquor from the piston ring of etching procedure;
Hard chromium plating tank liquor composition and process specification
Chromic anhydride CrO
3200～220g/L
Sulfuric acid H
2SO
42.2～2.7g/L
Trivalent chromium Cr
3+3～4.5g/L
Acid is than (CrO
3/ SO
4 2-) 100/1.2
Temperature: 58～60 ℃
Current density: 40～55A/dm
2
Time: 2.4～6.0h
Washing step: the piston ring behind the hard chromium plating inserted in 60～70 ℃ the clear water and wash;
Dehydrogenation operation: the piston ring after the washes clean is put into the baking oven dehydrogenation;
Temperature: 200～220 ℃
Time: 3～4h
Porosity operation: the piston ring after the above-mentioned operation inserted carry out porosity in the porosity tank liquor;
Porosity tank liquor composition and process specification:
Sodium hydroxide NaOH 30～50g/L
Sodium carbonate Na
2CO
320～30g/L
Sodium phosphate Na
3PO4 5～10g/L
Current density: 20～30A/dm
2
PH value 12～13.5
Time 2～3min
The sandblast operation: the piston ring behind the porosity carries out sand blast;
Equipment: cylindrical sandblasting machine
Workpiece rotational frequency: 36rpm
Sand jet outlet travelling speed 0.28m/min
Sand grains order number: 220～280 orders
Sandblast initial velocity: 280～320m/s
The sandblast time: 2～3min
The electrolytic degreasing operation: the piston ring after the sand blast is carried out electrolytic degreasing, and the prescription of electrolytic degreasing tank liquor is
Sodium hydroxide NaOH 35～55g/L
Sodium carbonate Na
2CO
312～18g/L
Sodium phosphate Na
3PO4 5～10g/L
OP-10 emulsifier 2～4g/L
Remove 50～60 ℃ of oil temperatures
Oil removing time 2～3min
Washing step: the piston ring behind the electrolytic degreasing is inserted in the clear water and is washed;
Salt pickling operation: the piston ring after the washing is inserted and is carried out the salt pickling in the salt descaling bath liquid:
32% hydrochloric acid is pressed 1 (HCl): 2 (H
2O)
Normal temperature salt is washed 1～3min
Washing step: the piston ring after the salt pickling is inserted in the clear water once more and is washed;
Sulfuric acid is washed operation: will insert in the sulfuric acid washing trough liquid from the piston ring of last operation, and washing,
5%H
2SO
4Sulfuric acid is washed 1～3min;
Washing step: the piston ring after sulfuric acid is washed is inserted in the clear water once more and is washed;
Zinc-plated treating process: carry out zinc-plated processing then, the tank liquor prescription and the process specification of zinc-plated processing
Stannous sulfate 150～180g/L
Sulfuric acid 50～85g/L
SS-820 brightening agent 15mg/L
SS82 brightening agent 2mg/L
Cathode-current density 5～8A/dm
2
Zinc-plated time 15～25mm.
3. according to the surface spongy tin plating technique thereof of the described piston ring of claim 2, it is characterized in that: the cylindrical polishing face is to guarantee the surface of good roughness being arranged more than 0.8.
4. according to the surface spongy tin plating technique thereof of the described piston ring of claim 2, it is characterized in that: between dehydrogenation operation and porosity operation, mechanical manufacturing procedure is arranged: will encircle the size that height, radial thickness and bucket face degree etc. are worked into product figure requirement.
5. according to the surface spongy tin plating technique thereof of the described piston ring of claim 2, it is characterized in that: the washing drying process is arranged after zinc-plated operation: the piston ring after zinc-plated is inserted in the clear water and is washed; Insert then in the conventional baking oven and toast roasting temperature: 85～95 ℃, stoving time is 5～8min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910272826A CN101839340A (en) | 2009-11-14 | 2009-11-14 | Piston ring and surface spongy tin plating technique thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910272826A CN101839340A (en) | 2009-11-14 | 2009-11-14 | Piston ring and surface spongy tin plating technique thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101839340A true CN101839340A (en) | 2010-09-22 |
Family
ID=42742910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910272826A Pending CN101839340A (en) | 2009-11-14 | 2009-11-14 | Piston ring and surface spongy tin plating technique thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101839340A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103056173A (en) * | 2011-10-21 | 2013-04-24 | 襄阳博亚精工装备股份有限公司 | Turning roll with spongy chromium plating technique to achieve roll face texturing and manufacturing method thereof |
| CN103089479A (en) * | 2013-01-21 | 2013-05-08 | 南京理工大学 | Wear-resisting piston ring with hard-soft composite coating and textured surface and wear-resisting piston ring manufacture method |
| CN103573462A (en) * | 2012-07-25 | 2014-02-12 | 常州南车柴油机零部件有限公司 | Piston ring |
| CN105586613A (en) * | 2014-10-22 | 2016-05-18 | 北京实验工厂 | Hard chromium plating method and solution formula for piston rod class parts |
| CN105714289A (en) * | 2015-09-30 | 2016-06-29 | 安徽中盛罐业有限公司 | Tin case surface treatment process |
| CN105714278A (en) * | 2015-09-30 | 2016-06-29 | 安徽中盛罐业有限公司 | Tinplate surface tinning process |
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| CN103056173A (en) * | 2011-10-21 | 2013-04-24 | 襄阳博亚精工装备股份有限公司 | Turning roll with spongy chromium plating technique to achieve roll face texturing and manufacturing method thereof |
| CN103573462A (en) * | 2012-07-25 | 2014-02-12 | 常州南车柴油机零部件有限公司 | Piston ring |
| CN103089479A (en) * | 2013-01-21 | 2013-05-08 | 南京理工大学 | Wear-resisting piston ring with hard-soft composite coating and textured surface and wear-resisting piston ring manufacture method |
| CN103089479B (en) * | 2013-01-21 | 2015-09-30 | 南京理工大学 | Wear-resistant piston ring with hard-soft composite coating and textured surface and preparation method |
| CN105586613A (en) * | 2014-10-22 | 2016-05-18 | 北京实验工厂 | Hard chromium plating method and solution formula for piston rod class parts |
| CN105714289A (en) * | 2015-09-30 | 2016-06-29 | 安徽中盛罐业有限公司 | Tin case surface treatment process |
| CN105714278A (en) * | 2015-09-30 | 2016-06-29 | 安徽中盛罐业有限公司 | Tinplate surface tinning process |
| CN106868556A (en) * | 2017-01-21 | 2017-06-20 | 郑州人造金刚石及制品工程技术研究中心有限公司 | A kind of novel high wear-resistant composite plating piston ring and preparation method thereof |
| CN106868556B (en) * | 2017-01-21 | 2018-07-13 | 郑州人造金刚石及制品工程技术研究中心有限公司 | A kind of high abrasion composite plating piston ring and preparation method thereof |
| CN107447087A (en) * | 2017-06-07 | 2017-12-08 | 中国电子科技集团公司第五十五研究所 | A kind of segmented dehydrogenation process method for cutting down package casing |
| CN108266528A (en) * | 2018-01-24 | 2018-07-10 | 安徽浩丰实业有限公司 | A kind of piston ring |
| CN108823612A (en) * | 2018-06-29 | 2018-11-16 | 长沙大力神液压工程有限公司 | A kind of inner hole of workpiece hard chrome electroplating solution and its electroplating technology |
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Application publication date: 20100922 |