CN101984133A - Plunger surface self-lubricating carbon based coating and preparation method thereof - Google Patents
Plunger surface self-lubricating carbon based coating and preparation method thereof Download PDFInfo
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- CN101984133A CN101984133A CN2010105519736A CN201010551973A CN101984133A CN 101984133 A CN101984133 A CN 101984133A CN 2010105519736 A CN2010105519736 A CN 2010105519736A CN 201010551973 A CN201010551973 A CN 201010551973A CN 101984133 A CN101984133 A CN 101984133A
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- plunger
- coating
- carbon
- preparation
- chromium
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- 238000000576 coating method Methods 0.000 title claims abstract description 36
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 33
- 239000011248 coating agent Substances 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 32
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000011651 chromium Substances 0.000 claims abstract description 20
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 17
- 229910052786 argon Inorganic materials 0.000 claims abstract description 16
- 238000004544 sputter deposition Methods 0.000 claims abstract description 13
- 238000007733 ion plating Methods 0.000 claims abstract description 12
- 238000004140 cleaning Methods 0.000 claims abstract description 9
- 239000002131 composite material Substances 0.000 claims abstract description 6
- 238000005516 engineering process Methods 0.000 claims abstract description 6
- 238000000151 deposition Methods 0.000 claims abstract description 4
- 230000008021 deposition Effects 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 7
- 238000007792 addition Methods 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 4
- 230000004048 modification Effects 0.000 abstract description 3
- 238000012986 modification Methods 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- 238000001816 cooling Methods 0.000 abstract 1
- 239000007888 film coating Substances 0.000 abstract 1
- 238000009501 film coating Methods 0.000 abstract 1
- 238000010849 ion bombardment Methods 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 238000007747 plating Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000000758 substrate Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 8
- 239000000446 fuel Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000003245 working effect Effects 0.000 description 6
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000002000 scavenging effect Effects 0.000 description 4
- 239000000295 fuel oil Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 210000001138 tear Anatomy 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 206010036596 premature ejaculation Diseases 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Abstract
The invention discloses a plunger surface self-lubricating carbon based coating and a preparation method thereof. Magnetic control sputtering ion plating technology is adopted, and a composite coating which contains a small amount of chromium and takes carbon as substrate is produced on the surface of plunger by deposition. The preparation process includes that: a plunger is cleaned and dried, the plunger is placed into the vacuum chamber of multi-target magnetic control sputtering iron plating equipment, and vacuumization, argon feeding, ion bombardment cleaning, film coating and cooling under interruption are carried out, and then the plunger is taken out. The coating has extremely low friction coefficient and low wear rate, high hardness and good bonding strength, and the service life of plunger is obviously prolonged while ensuring dimensional accuracy of plunger. The invention is especially applicable to modification on surface of parts served in sliding friction environment.
Description
Technical field
The invention belongs to the metal surface properties modification technical field, relate to a kind of self-lubricating carbon back coating and technology of preparing thereof that is deposited on plunger surface.
Background technology
Plunger is one of vital part of oil injection pump, the plunger formation plunger matching parts that matches with plunger bushing, and plunger moves reciprocatingly in plunger bushing, and compression enters the fuel oil of plunger bushing, makes fuel oil pass through delivery valve, realizes providing the function of high pressure fuel.The mode of operation of plunger and Working environment make plunger become one of part the most easy to wear in the oil injection pump.The position that plunger often weares and teares has: (1) uses the oil mass position always; (2) the top corresponding seamed edge place relative with oilhole.
The wearing and tearing of plunger bring many problems can for oil injection pump and engine.At first, the wearing and tearing of plunger can make supply time change, and when wearing and tearing in the seamed edge place of plunger, during the beginning fuel feeding fuel oil are refluxed from the gap, and the fuel feeding time opening is postponed.And wear and tear when plunger skewed slot and oil return hole, can make the high-pressure oil premature ejaculation during fuel feeding and shift to an earlier date fuel cut-off.Be to cause late confession, the phenomenon that stop morning, supply time reduces after the plunger wear.Secondly, fuel delivery reduces, since evening for, early stop, supply time reduces, owing to can making the gap become, wearing and tearing cause leakage greatly again, particularly more obvious when low speed, pressure reduces generally and to change not too obviously when at a high speed big oil mass, can cause that like this low engine speed is unstable and start difficulty, can not start when serious.At last, the wearing and tearing of plunger can cause the fuel delivery inequality, and are especially even more serious when low speed, and it is unstable or do not have a situation such as idling to occur low speed when serious.
Along with the continuous aggravation of industry competition, each engine production merchant or effort reduction production cost of products, or make great efforts to provide more value for the client, the important composition aspect that engine is worth is exactly its work-ing life.Because plunger is one of the easiest precision component that lost efficacy because of wearing and tearing in the oil injection pump of engine, so be worth and be significant increasing engine the work-ing life of improving plunger.Therefore be necessary to find a kind of dimensional precision that very little influence is arranged, can reduce or delay the method for plunger wear again effectively plunger.
Thereby prior art awaits to improve and improve.
Summary of the invention
The object of the present invention is to provide a kind of dimensional precision influence to plunger very little, and can reduce or delay plunger wear effectively, can significantly improve the self-lubricating carbon back coating in plunger work-ing life and preparation method thereof.
Technical scheme of the present invention comprises:
A kind of plunger surface self-lubricating carbon back coating, wherein: it is to adopt the magnetic controlled sputtering ion plating technology, and what deposition produced on plunger surface is the composite deposite that contains small additions of chromium of matrix with carbon;
Described thickness of coating is 1.5 μ m～2.5 μ m, and hardness is 2000HV～2500HV; Frictional coefficient is 0.05～0.09, and the specific wear rate is (2～4) * 10
-17m
3/ Nm.
A kind of preparation method of plunger surface self-lubricating carbon back coating wherein, may further comprise the steps:
S1, will put into the vacuum chamber of multi-target magnetic control sputtering ion plating equipment behind the plunger cleaning-drying, and vacuum chamber is evacuated down to (2～6) * 10
-3Pa;
S2, feeding argon gas, the flow of argon gas is 20～30sccm in the whole coating process;
S3, icon bombardment cleaning, its time is 30～60min, adjust negative bias values this moment to be-500V～-200V, pulse-repetition is 150～250KHz, pulse width is 500～1000ns;
S4, beginning plated film stage, adjust negative bias values and be-65V～-95V, pulse-repetition is 50～150KHz, pulse width is 1000～1500ns;
S5, open two carbon targets and a chromium target simultaneously when plated film, the target electric current is respectively: I
Cr=0.2～0.5A, I
C=6～9A; Working hour is 240～360min;
After S6, plated film were finished, outage was cooled to room temperature, took out plunger.
The technique effect that the present invention produces is: the present invention is owing to use two carbon targets and a chromium target simultaneously, contain carbon and chromium metal in the coating that obtains, especially the electric current to three targets has carried out independent control, therefore can be as required, and the composition of the coating of preparation is adjusted and controlled.The adding of chromium metal makes prepared coating have high rigidity, in the time of low-friction coefficient, also has the good binding performance.Thickness of coating of the present invention is even, microtexture is for being the composite deposite that contains small additions of chromium of matrix with carbon, have low frictional coefficient and specific wear rate, high rigidity and good binding intensity, this coating is fit to be applied to the part of being on active service in the sliding friction environment, for example plunger surface is carried out modification, after coating is deposited on plunger surface, can under the condition that guarantees the plunger dimensional precision, significantly improve its work-ing life.Under identical condition, the plunger that does not have coating work-ing life that is coated with the plunger of this coating has improved 2～4 times.
Description of drawings
Fig. 1 is a plunger surface self-lubricating carbon back coating preparation method schema of the present invention.
Embodiment
Below in conjunction with accompanying drawing embodiment, illustrate that structural principle of the present invention and preparation method are as follows:
Plunger surface self-lubricating carbon back coating of the present invention is to be attachment with the engine plunger, is the coating matrix with the carbon, contains the small additions of chromium metal ingredient, adopts the magnetic controlled sputtering ion plating technology, the composite deposite that deposition produces on plunger surface.
As shown in Figure 1, the main preparation process of plunger surface self-lubricating carbon back coating of the present invention is: will put into the vacuum chamber of multi-target magnetic control sputtering ion plating equipment behind the plunger cleaning-drying, get final product through taking-up plunger after vacuumizing, lead to the stages such as argon gas, icon bombardment cleaning, plated film, outage.
Main preparation process condition and parameter are:
Need vacuum is extracted into before the logical argon gas: (2～6) * 10
-3Pa;
The flow of argon gas is in the coating process: 20～30sccm;
In the icon bombardment cleaning stage, the time is 30～60min, negative bias values is-and 500V～-200V, pulse-repetition is 100～250KHz, pulse width is 500～1000ns;
In the plated film stage, the plated film time is: 240～360min; Negative bias values is-65V～-95V, pulse-repetition is 50～150KHz, pulse width is 1000～1500ns;
Open two carbon targets and a pure metal chromium target simultaneously in the plated film stage: the target electric current is respectively: I
Cr=0.2～0.5A, I
C=6～9A;
Below provide several specific embodiments, describe technical scheme of the present invention and inventive features in detail.Need to prove that these embodiment are some preferable examples, technical solution of the present invention is not limited to these embodiment.
Embodiment 1:
Step 1, make vacuum tightness reach 2 * 10 with putting into the vacuum chamber of multi-target magnetic control sputtering ion plating equipment behind the plunger cleaning-drying, vacuumizing
-3Pa, and feed argon gas;
Step 2, the plunger in step 1 vacuum chamber is carried out icon bombardment cleaning, controlled variable is: negative bias values-300V, pulse-repetition 100KHz, pulse width 500ns, bombardment scavenging period 30min;
Step 3, open two carbon targets and a chromium target simultaneously, plunger after step 2 processing is carried out plated film, controlled variable is: the flow of argon gas is 22sccm, negative bias values-95V, pulse-repetition 50KHz, pulse width 1000ns, the carbon target current is 6A, the target current of chromium target is 0.2A, and target current working hour 240min promptly finishes treating processes.
The resulting plunger coating hardness of present embodiment is 2400HV, and frictional coefficient is 0.05, and thickness is 1.6 μ m, and the specific wear rate is 4.0 * 10
-17m
3/ Nm.
Embodiment 2:
Step 1, make vacuum tightness reach 3 * 10 with putting into the vacuum chamber of multi-target magnetic control sputtering ion plating equipment behind the plunger cleaning-drying, vacuumizing
-3Pa, and feed argon gas;
Step 2, the plunger in step 1 vacuum chamber is carried out icon bombardment cleaning, controlled variable is: negative bias values-400V, pulse-repetition 120KHz, pulse width 700ns, bombardment scavenging period 35min;
Step 3, open two carbon targets and a chromium target simultaneously, plunger after step 2 processing is carried out plated film, controlled variable is: the flow of argon gas is 24sccm, negative bias values-85V, pulse-repetition 70KHz, pulse width 1200ns, the carbon target current is 7A, the target current of chromium target is 0.3A, and target current working hour 270min promptly finishes treating processes.
The resulting plunger coating hardness of present embodiment is 2315HV, and frictional coefficient is 0.07, and thickness is 1.9 μ m, and the specific wear rate is 3.4 * 10
-17m
3/ Nm.
Embodiment 3
Step 1, make vacuum tightness reach 4 * 10 with putting into the vacuum chamber of multi-target magnetic control sputtering ion plating equipment behind the plunger cleaning-drying, vacuumizing
-3Pa, and feed argon gas;
Step 2, the plunger in step 1 vacuum chamber is carried out icon bombardment cleaning, controlled variable is: negative bias values-450V, pulse-repetition 150KHz, pulse width 800ns, bombardment scavenging period 40min;
Step 3, open two carbon targets and a chromium target simultaneously, plunger after step 2 processing is carried out plated film, controlled variable is: the flow of argon gas is 26sccm, negative bias values-75V, pulse-repetition 100KHz, pulse width 1400ns, the carbon target current is 8A, the target current of chromium target is 0.4A, and target current working hour 300min promptly finishes treating processes.
The resulting plunger coating hardness of present embodiment is 2275HV, and frictional coefficient is 0.08, and thickness is 2.1 μ m, and the specific wear rate is 3.0 * 10
-17m
3/ Nm.
Embodiment 4
Step 1, make vacuum tightness reach 5 * 10 with putting into the vacuum chamber of multi-target magnetic control sputtering ion plating equipment behind the plunger cleaning-drying, vacuumizing
-3Pa, and feed argon gas;
Step 2, the plunger in step 1 vacuum chamber is carried out icon bombardment cleaning, controlled variable is: negative bias values-200V, pulse-repetition 200KHz, pulse width 1000ns, bombardment scavenging period 45min;
Step 3, open two carbon targets and a chromium target simultaneously, plunger after step 2 processing is carried out plated film, controlled variable is: the flow of argon gas is 28sccm, negative bias values-65V, pulse-repetition 150KHz, pulse width 1500ns, the carbon target current is 9A, the target current of chromium target is 0.5A, and target current working hour 330min promptly finishes treating processes.
The resulting plunger coating hardness of present embodiment is 2046HV, and frictional coefficient is 0.09, and thickness is 2.3 μ m, and the specific wear rate is 2.3 * 10
-17m
3/ Nm.
In sum, the present invention is by adopting the multi-target magnetic control sputtering ion plating technique, use two carbon targets and a chromium target simultaneously, plunger surface is deposited self-lubricating carbon back coating, contain carbon and chromium metal in the coating that obtains, especially the electric current to three targets has carried out independent control, as required the composition of coating of preparation is adjusted and controlled, low frictional coefficient and specific wear rate have been obtained to have, the composite deposite of high rigidity and good binding intensity, this coating has significantly improved its work-ing life under the condition that guarantees the plunger dimensional precision.
Should be understood that above-mentioned description at specific embodiment is comparatively detailed, can not therefore think the restriction to scope of patent protection of the present invention, scope of patent protection of the present invention should be as the criterion with claims.
Claims (2)
1. plunger surface self-lubricating carbon back coating is characterized in that: it is to adopt the magnetic controlled sputtering ion plating technology, and what deposition produced on plunger surface is the composite deposite that contains small additions of chromium of matrix with carbon;
Described thickness of coating is 1.5 μ m～2.5 μ m, and hardness is 2000HV～2500HV; Frictional coefficient is 0.05～0.09, and the specific wear rate is (2～4) * 10
-17m
3/ Nm.
2. the preparation method of a plunger surface self-lubricating carbon back coating is characterized in that, may further comprise the steps:
S1, will put into the vacuum chamber of multi-target magnetic control sputtering ion plating equipment behind the plunger cleaning-drying, and vacuum chamber is evacuated down to (2～6) * 10
-3Pa;
S2, feeding argon gas, the flow of argon gas is 20～30sccm in the whole coating process;
S3, icon bombardment cleaning, its time is 30～60min, adjust negative bias values this moment to be-500V～-200V, pulse-repetition is 150～250KHz, pulse width is 500～1000ns;
S4, beginning plated film stage, adjust negative bias values and be-65V～-95V, pulse-repetition is 50～150KHz, pulse width is 1000～1500ns;
S5, open two carbon targets and a chromium target simultaneously when plated film, the target electric current is respectively: I
Cr=0.2～0.5A, I
C=6～9A; Working hour is 240～360min;
After S6, plated film were finished, outage was cooled to room temperature, took out plunger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105519736A CN101984133A (en) | 2010-11-19 | 2010-11-19 | Plunger surface self-lubricating carbon based coating and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105519736A CN101984133A (en) | 2010-11-19 | 2010-11-19 | Plunger surface self-lubricating carbon based coating and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101984133A true CN101984133A (en) | 2011-03-09 |
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| CN2010105519736A Pending CN101984133A (en) | 2010-11-19 | 2010-11-19 | Plunger surface self-lubricating carbon based coating and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103060751A (en) * | 2013-01-09 | 2013-04-24 | 兰州理工大学温州泵阀工程研究院 | Superhard corrosion-resistant physical vapor deposition (PVD) coating for valve sealing component and plating process thereof |
| CN107269435A (en) * | 2017-07-31 | 2017-10-20 | 重庆康明斯发动机有限公司 | A kind of diesel fuel system and its electric-controlled fuel injector |
| CN108677152A (en) * | 2018-05-22 | 2018-10-19 | 南京飞燕活塞环股份有限公司 | A kind of piston ring surface chromium, graphite mixed coating preparation method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100999812A (en) * | 2007-01-05 | 2007-07-18 | 西安理工大学 | Chromium-doped non-crystalline graphite ware reducing coating layer and preparation process thereof |
-
2010
- 2010-11-19 CN CN2010105519736A patent/CN101984133A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100999812A (en) * | 2007-01-05 | 2007-07-18 | 西安理工大学 | Chromium-doped non-crystalline graphite ware reducing coating layer and preparation process thereof |
Non-Patent Citations (1)
| Title |
|---|
| 严少平 等: "基体偏压对磁控溅射类石墨镀层摩擦磨损性能的影响", 《摩擦学学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103060751A (en) * | 2013-01-09 | 2013-04-24 | 兰州理工大学温州泵阀工程研究院 | Superhard corrosion-resistant physical vapor deposition (PVD) coating for valve sealing component and plating process thereof |
| CN107269435A (en) * | 2017-07-31 | 2017-10-20 | 重庆康明斯发动机有限公司 | A kind of diesel fuel system and its electric-controlled fuel injector |
| CN108677152A (en) * | 2018-05-22 | 2018-10-19 | 南京飞燕活塞环股份有限公司 | A kind of piston ring surface chromium, graphite mixed coating preparation method |
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| ASS | Succession or assignment of patent right |
Owner name: WEN XIAOBIN Free format text: FORMER OWNER: SHENZHEN KINGMAG PRECISION TECH CO., LTD. Effective date: 20121213 |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20121213 Address after: 518172, building B501, building No. two, Tian Bei Digital South Road, Huang Ting North Road, Longgang District, Guangdong, Shenzhen Applicant after: Wen Xiaobin Address before: 518104, Shenzhen, Guangdong province Baoan District manhole street, and rich industrial zone, Wan Xia Industrial Park, 1 floor, 3 Applicant before: Shenzhen Kingmag Precision Technology Co., Ltd. |
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Application publication date: 20110309 |