CN101457282A - Processing method of marine vehicle diesel cylinder sleeve erosion resistance - Google Patents
Processing method of marine vehicle diesel cylinder sleeve erosion resistance Download PDFInfo
- Publication number
- CN101457282A CN101457282A CNA2008102496491A CN200810249649A CN101457282A CN 101457282 A CN101457282 A CN 101457282A CN A2008102496491 A CNA2008102496491 A CN A2008102496491A CN 200810249649 A CN200810249649 A CN 200810249649A CN 101457282 A CN101457282 A CN 101457282A
- Authority
- CN
- China
- Prior art keywords
- cylinder sleeve
- high energy
- energy beam
- cast iron
- cylinder liner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The invention discloses an anti-cavitation treatment method of a cylinder liner of a marine diesel engine. The implementation steps are as follows: a machined cast iron cylinder liner is positioned on a rotary device, and one side of the cylinder liner is provided with a high energy beam generation device which is capable of being in relative motion with the cylinder liner along the axial direction of the cylinder liner at uniform velocity. The high energy beams irradiates the surface of a water-cooling part of an external wall of the cylinder liner to be sequentially melted and rapidly frozen to form a chill. The anti-cavitation service life of the chill is longer than that of a nitrided layer. In the method, the anti-cavitation capacity of a white cast iron layer produced on the surface of a grey cast iron cylinder liner is far higher than that of the grey cast iron, the method does not has the problem of easy exfoliation due to poor binding force, and the whole production course does not produce environmental pollution.
Description
Technical field
The invention belongs to material corrosion and guard technology field, relate in particular to the treatment process of boat diesel engine cylinder sleeve.
Background technology
At present, the boats and ships more than 90% all use the water-cooled diesel engine as advancing and generation driving force, and the cylinder sleeve of diesel engine cylinder iron casting processing forms.When boat diesel engine is worked for a long time, can produce the fixed vibrational frequency under low rotation speed large torque.When amplitude is in negative pressure, outer wall of cylinder jachet water-cooled position is dissolved in that gas in the cooling fluid comes out with the isolated in form of bubble and attached on the casing wall, these bubbles are crumbled and fall rapidly when vibration amplitude is in malleation, gas dissolves in again volume and local pressure is reduced suddenly, cooling fluid is to the low pressure area high-speed motion, thereby the bubble position of crumbling and fall is produced great surging force and high temperature.Because Cast iron liner is free machining grey cast iron, its interior tissue is the mixed structure of ferrite, perlite and graphite, and wherein ferrite hardness is low, easily viscous deformation, and graphite does not have any intensity, very easily peels off under external force.Above-mentioned in addition mixed structure has constituted a large amount of microcorrosion batteries, makes the collaborative generation of galvanic corrosion and cavitation pitting to have aggravated cavitation pitting destruction.Go round and begin again thus, the top layer of casing wall part surface produces tired and comes off gradually, a large amount of needle-like apertures occurs, is called " cavitation pitting ", and these apertures are expanded gradually, form deep hole or crackle at last.
Existing anti-cavitation pitting surface treatment method has following three kinds:
(1), applies organic composite coating.Its weak point is the heat radiation that influences cylinder sleeve, and shock resistance descends significantly and causes coating shedding under the high temperature.
(2), thermospray zinc-aluminium corrosion protection coating.Its weak point is that zinc-aluminium layer hardness is low, and shock resistance and anti-fatigue performance are poor, and is poor with the bonding force of cast iron, comes off in the form of sheets easily.
(3), nitrogenize.There is not the bonding force problem in this method, and the hardness height, and shock resistance and anti-fatigue performance are good, thereby uses at most at present.But weak point is arranged also, the one: because nitride layer is thinner, nitrogenize can only be last procedure of cylinder sleeve processing, do not allow precision work again after the nitrogenize, but nitridation process needs keeping tens of hours more than 500 ℃, very serious as the cylinder-liner distortion problem of thin wall cylinder precision part, distortion in a single day in these tens of hours, the lighter has destroyed cylinder sleeve piston tolerance clearance aggravation wearing and tearing and vibration, and weight person scraps, and causes production cost sharply to increase; The 2nd, nitrogenize is only carried out on the ferrite surface, and any variation can not take place graphite, and cylinder sleeve in use graphite takes the lead in coming off, and exposes the not ferrite of nitrogenize of bottom, forms a large amount of corrosion microbatterys, has aggravated cavitation pitting speed and has developed into the ulcer corrosion; The 3rd: consume energy big efficient of nitrogenize is low-cost high.
Therefore, the method that does not have a kind of anti-cavitation pitting of feeling quite pleased to handle at present as yet.
Summary of the invention
The objective of the invention is to overcome the deficiency of present three kinds of anti-cavitation pitting surface treatment methods, propose a kind of treatment process of new marine vehicle diesel cylinder sleeve erosion resistance, this method is actual to be to make the Cast iron liner outer wall produce the treatment process that the phase transformation rapidly solidification becomes white cast iron.
For achieving the above object, step of the present invention is as follows:
1, manufactured Cast iron liner is positioned on the swivel arrangement, Cast iron liner one side install one can with cylinder sleeve along the cylinder sleeve axis direction high energy beam current generating unit of relative movement at the uniform velocity.
2, start swivel arrangement cylinder sleeve is rotated around axis, start the high energy beam generating unit, produce high energy beam.
3, high energy beam shines on the surface, outer wall of cylinder jachet water-cooled position and makes it to produce partial instant melting, along with the cylinder sleeve rotation reaches and the at the uniform velocity relative movement of high energy beam along axis direction, surface, outer wall of cylinder jachet water-cooled position finally forms the hard uniform chill of one deck according to helical trajectory fusing and rapid solidification.
The temperature of above-mentioned high energy beam current is not less than 5000 ℃, and beam diameter is not less than 3mm.
Above-mentioned high energy beam can be laser beam, beam-plasma or other gathering high-energy beam.
In order to eliminate the internal stress that rapidly solidification process and casting are before this produced with roughing, the present invention can be according to following operation production:
Cylinder sleeve casting → roughing → high energy beam rapidly solidification → stress relieving → precision work.Be specially;
1, the cylinder sleeve casting first roughing in back is worked into the finished figure paper size with outer wall of cylinder jachet water-cooled position, and other precision-fit faces leave certain allowance for finish;
2, undertaken by aforesaid the 1st, 2,3 steps;
3, with cylinder sleeve annealing, eliminate all internal stresss that produce before this;
4, press drawing precision work, eliminate all distortion that produce before this.
The Cast iron liner of handling through aforesaid method can anti-cavitation pitting principle be:
Because cavitation pitting be when cavity is crumbled and fall, produce the violent viscous deformation in high-speed micro-jet atarting material surface and the material surface crack initiation that causes, expansion, local fracture so that peel off, so the hardness of material surface is high more, viscous deformation is difficult more, just difficult more generation of cavitation pitting.After grey cast iron refuse and quick cooled and solidified, graphite can all be dissolved in the iron, forms and the diverse white cast iron of grey cast iron interior tissue.The interior tissue of white cast iron is single cementite.Cementite is a kind of very hard iron-carbon compound, can produce viscous deformation hardly, and cementite has higher thermal conductivity and erosion resistance, and single organizing yet can not form corrosion cell, and therefore anti-cavitation pitting ability is higher than grey cast iron far away.
The high energy beam rapidly solidification is only handled outer wall of cylinder jachet water-cooled position, does not relate to other precision-fit faces.
Positively effect of the present invention is: 1, the white cast iron layer that generates on grey cast iron cylinder sleeve surface is made up of single cementite, the hardness height, and thermal conductivity is good, and anti-cavitation pitting ability is higher than grey cast iron far away.Chill is to generate on the basis of cylinder sleeve self fusing, does not therefore have the flaky problem of bonding force difference; 2, chill thickness is controlled easily, and thickness is much larger than nitride layer thickness, and does not have graphite and be mingled with, and the whole anti-cavitation pitting life-span is higher than nitride layer; 3, consolidation whitening operation can be carried out before stress relieving and precision work, had eliminated all internal stresss and distortion that cylinder sleeve produces before this; 4, production technique is simple, the efficient height, and less energy consumption, no waste product, production process does not produce environmental pollution.
Description of drawings
Fig. 1 is the relative cavitation pitting performance comparison diagram behind 12 hours cavitation pittings, and curve is the outer wall of cylinder jachet sample cavitation pitting weight-loss curve of three kinds of situations among the figure, and ordinate represents that accumulative total is weightless, and unit is a milligram, and abscissa is the cavitation pitting time, and unit is hour.
Fig. 2 is the surface topography contrast photo of Cast iron liner after 8 hours ultrasonic wave are quickened the cavitation pitting processing, wherein figure (a) is the erosion profile without any processing cylinder sleeve sample, figure (b) is the erosion profile of cylinder sleeve sample after nitriding is handled, the erosion profile of figure (c) cylinder sleeve sample after rapidly solidification is handled.
Embodiment
Enforcement of the present invention no longer repeats at this as described in the summary of the invention.
The front further specifies effect of the present invention in conjunction with Fig. 1 Fig. 2 again.
Find out that by Fig. 1 the trust of anti-cave performance that the anti-relatively cavitation pitting performance comparison diagram behind 12 hours cavitation pittings, rapidly solidification are handled cylinder sleeve is 1.36 times that nitriding is handled, and is 4.48 times without any processing.From the development trend of weight-loss curve, along with the prolongation of time, above-mentioned gap also can continue to enlarge.
As seen from Figure 2, (Fig. 2 a) cavitation pitting and galvanic corrosion is very serious, and the top layer part comes off fully, and the bottom still has a large amount of darker cavitation pittings hole, is cellular distribution on unprocessed surface.Nitriding treat surface (Fig. 2 b) cavitation pitting is cheated network-like distribution, and the cavitation pitting hole is darker, has produced serious ulcer corrosion, and textura epidermoidea partly comes off.Surface melting treat surface (Fig. 2 c) has only the subregion more shallow cavitation pitting hole to occur, is interrupted spot distribution.
Claims (4)
1. the treatment process of a marine vehicle diesel cylinder sleeve erosion resistance is characterized in that, step is as follows:
The first step: manufactured Cast iron liner is positioned on the swivel arrangement, Cast iron liner one side install one can with cylinder sleeve along the cylinder sleeve axis direction high energy beam current generating unit of relative movement at the uniform velocity;
Second step: start swivel arrangement cylinder sleeve is rotated around axis, start the high energy beam generating unit, produce high energy beam;
The 3rd step: high energy beam shines on the surface, outer wall of cylinder jachet water-cooled position and makes it to produce partial instant melting, along with the cylinder sleeve rotation reaches and the at the uniform velocity relative movement of high energy beam along axis direction, surface, outer wall of cylinder jachet water-cooled position finally forms the hard uniform chill of one deck according to helical trajectory fusing and rapid solidification.
2, the treatment process of marine vehicle diesel cylinder sleeve erosion resistance as claimed in claim 1 is characterized in that, step is as follows:
The first step: the cylinder sleeve casting first roughing in back, outer wall of cylinder jachet water-cooled position is worked into the finished figure paper size, other precision-fit faces leave certain allowance for finish;
Second step: carry out according to the described steps in sequence of claim 1;
The 3rd step:, eliminate all internal stresss that produce before this with cylinder sleeve annealing;
The 4th step: press drawing precision work, eliminate all distortion that produce before this.
3, the treatment process of marine vehicle diesel cylinder sleeve erosion resistance as claimed in claim 1 or 2 is characterized in that, the temperature of described high energy beam current is not less than 5000 ℃, and beam diameter is not less than 3mm.
4, the treatment process of marine vehicle diesel cylinder sleeve erosion resistance as claimed in claim 1 or 2 is characterized in that, described high energy beam is laser beam, beam-plasma or assembles high-energy beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102496491A CN101457282A (en) | 2008-12-25 | 2008-12-25 | Processing method of marine vehicle diesel cylinder sleeve erosion resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102496491A CN101457282A (en) | 2008-12-25 | 2008-12-25 | Processing method of marine vehicle diesel cylinder sleeve erosion resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101457282A true CN101457282A (en) | 2009-06-17 |
Family
ID=40768402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008102496491A Pending CN101457282A (en) | 2008-12-25 | 2008-12-25 | Processing method of marine vehicle diesel cylinder sleeve erosion resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101457282A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104911303A (en) * | 2015-07-07 | 2015-09-16 | 中原内配集团股份有限公司 | Surface micro-melting treated cylinder jacket and preparation method thereof |
| CN108611484A (en) * | 2018-08-08 | 2018-10-02 | 广东工业大学 | A kind of metal blade laser shock peening method free of surface defects without deformation |
-
2008
- 2008-12-25 CN CNA2008102496491A patent/CN101457282A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104911303A (en) * | 2015-07-07 | 2015-09-16 | 中原内配集团股份有限公司 | Surface micro-melting treated cylinder jacket and preparation method thereof |
| CN108611484A (en) * | 2018-08-08 | 2018-10-02 | 广东工业大学 | A kind of metal blade laser shock peening method free of surface defects without deformation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104195322A (en) | Surface strengthening treatment method for metal material through coupling electroplastic effect and ultrasonic rolling | |
| EP1794434B1 (en) | Anti-cavitation diesel cylinder liner | |
| US7073492B2 (en) | Cylinder crankcase, procedure for manufacturing the cylinder bushings for the cylinder crankcase, and procedure for manufacturing the cylinder crankcase with these cylinder bushings | |
| CN103089479A (en) | Wear-resisting piston ring with hard-soft composite coating and textured surface and wear-resisting piston ring manufacture method | |
| US20120227699A1 (en) | Linerless engine | |
| CN103614687A (en) | Preparation technique of continuous casting crystallizer copper plate surface cermet coating | |
| US10371085B2 (en) | Cylinder liner and method of forming the same | |
| CN109404154A (en) | Cylinder jacket, the preparation process of cylinder jacket and the engine using the cylinder jacket | |
| CN106837507A (en) | A kind of internal combustion engine cooling water pump and its production technology | |
| CN104928729A (en) | Electrodeposition-laser remelting strengthening process of Ni-nanometer TiN composite layer on surface of nickel base superalloy | |
| Mallick et al. | Centrifugally cast functionally graded materials: Fabrication and challenges for probable automotive cylinder liner application | |
| CN101457282A (en) | Processing method of marine vehicle diesel cylinder sleeve erosion resistance | |
| CN104651707A (en) | Manufacturing method of alloy cast iron piston ring | |
| CN103949614A (en) | Oppositely-open-type radial bearing bush product, and fabrication method and laser re-melting device thereof | |
| CN114054747B (en) | Boron nitride powder composite doped stainless steel piston ring for engine and preparation method thereof | |
| CN101717879B (en) | White copper alloy and preparation method thereof | |
| EP2134879B1 (en) | Method for producing a crankshaft, in particular for diesel engines | |
| CN113151824B (en) | Cellular and columnar combined structure coating used in marine environment and preparation method thereof | |
| CN101386903A (en) | Application of laser heat treatment technology in marine diesel cylinder liner | |
| CN101709410A (en) | Nickel-based alloy and preparation method thereof | |
| CN100467650C (en) | TiC treated cast iron cylinder jacket and synthesizing method thereof | |
| Sanath et al. | Review on Corrosion studies of Heat Treated Al-Si Alloy | |
| CN115725927B (en) | Nano graphene composite layer on surface of ferrous metal and preparation method thereof | |
| US20230053869A1 (en) | Deformation-driven solid-phase extrusion device and one-step alloy bar preparation method by using same | |
| CN106639934A (en) | Valve spool and valve seat of bypass valve body of screw rod drilling tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090617 |