CN103981518A - Laser cladding method for improving abrasion resistance of mechanical seal sleeve for pump - Google Patents
Laser cladding method for improving abrasion resistance of mechanical seal sleeve for pump Download PDFInfo
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- CN103981518A CN103981518A CN201410209149.0A CN201410209149A CN103981518A CN 103981518 A CN103981518 A CN 103981518A CN 201410209149 A CN201410209149 A CN 201410209149A CN 103981518 A CN103981518 A CN 103981518A
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- axle sleeve
- machine envelope
- pump
- laser cladding
- cladding
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Abstract
The invention provides a laser cladding method for improving the abrasion resistance of a mechanical seal sleeve for a pump. The laser cladding method comprises the following steps: carrying out surface treatment on an abrasion resistance part of the mechanical seal sleeve; carrying out fusion covering on the abrasion resistance part subjected to surface treatment by using nickel-based composite powder through a laser, wherein the nickel-based composite powder comprises the following chemical components in percentage by mass: 0.5-1% of C, 14-19% of Cr, 3.5-5% of Si, 3-4.5% of B, 2-4% of Cu, 2-4% of Mo, 8-9% of Fe, 0.3-0.5% of CeO, 0.5-1% of Ti, 2.5-3.5% of W and the balance of Ni; and carrying out wet-type grinding on the mechanical seal sleeve subjected to fusion covering, detecting and processing. After the mechanical seal sleeve for the pump is modified by laser cladding, the hardness of the mechanical seal sleeve for the pump can reach HRC (Rockwell hardness) 72-76, and the mechanical seal sleeve for the pump is anti-abrasive and meanwhile resists various chemical media.
Description
Technical field
The present invention relates to laser melting and coating technique field, refer to especially a kind of pump machine envelope axle sleeve erosion resistant laser cladding method.
Background technology
Laser melting and coating technique is-kind relate to the interdisciplinary new and high technology of the multi-door subjects such as light, mechanical, electrical, computer, material, physics, chemistry.It is proposed by eighties of last century the sixties, and the patent of the Section 1 discussion superlaser cladding of being born in 1976.Enter the eighties, laser melting and coating technique has obtained development rapidly, and the rapid prototyping processing technology of rising in conjunction with cad technique, for laser melting and coating technique has added again new vitality.
The laser melting and coating technique subject matter that further application faces is: 1. to realize at home the major cause of industrialization not yet be completely the unstable of quality of cladding layer to laser melting and coating technique.In laser cladding process, the speed of heating and cooling is exceedingly fast, top speed can reach 1012 DEG C/s. due to the thermograde of cladding layer and body material and the difference of thermal expansivity, may in cladding layer, produce number of drawbacks, mainly comprises pore, crackle, distortion and surface irregularity.2. the detection of laser cladding process and enforcement automatization control.3. the cracking sensitivity of laser cladding layer, remains a difficult problem that perplexs domestic and international investigator, is also the obstacle of engineering application and industrialization, although the formation of crackle is expanded and is studied, control method aspect is also immature.
In order to make pump machine envelope axle sleeve wear-resisting, prior art mainly contains following several mode: a, adopts carbide inserts cover, as silicon carbide or silicon nitride; B, electroplated coating; C, plasma oozes helium.Above-mentioned processing mode has improved the wear resistance of machine envelope axle sleeve to a certain extent, but all has defect separately.Carbide inserts cover: screw thread is beaten on sleeve outer circle surface, screw thread place cementing, then tumble in Wimet cover, can produce high temperature when running up and make it glue oxidation and cause mechanical seal position loosening, makes it inefficacy.Electroplated coating: easily peel off, hardness is low not wear-resisting.Plasma nitriding: rigidity layer is too thin.
In view of the defect of prior art, be necessary to study a kind of hardness high, pump wear-resistant and antiacid caustic corrosion seals axle sleeve with machine.
Summary of the invention
The present invention proposes a kind of pump machine envelope axle sleeve erosion resistant laser cladding method, has solved machine envelope axle sleeve hardness problem low, not wear-resisting, that resistance to acids and bases does not corrode in prior art.
Technical scheme of the present invention is achieved in that
Machine envelope axle sleeve erosion resistant laser cladding method for a kind of pump, comprising:
Surface treatment is carried out at erosion resistant position to machine envelope axle sleeve;
Utilize Ni-based composite powder to carry out cladding by laser apparatus at the described erosion resistant position after surface treatment; Wherein output rating is 1500-1800W, and focal length is 160-260mm, and powder sending quantity is 5-20g/min, and temperature of fusion is 1050-1080 DEG C; The chemical composition of described Ni-based composite powder and the mass percent of component are as follows: C:0.5-1%, Cr:14-19%, Si:3.5-5%, B:3-4.5%, Cu:2-4%, Mo:2-4%, Fe:8-9%, CeO:0.3-0.5%, Ti:0.5-1%, W:2.5-3.5% and Ni: surplus;
Described machine envelope axle sleeve after cladding step is carried out to the processing of wet type mill, after Check processing.
As preferred technical scheme, the wavelength of described laser apparatus is 976nm.
As preferred technical scheme, the sweep velocity of described laser apparatus is 0-12mm/s.
As preferred technical scheme, the granularity of described Ni-based composite powder is :-150/+280.
As preferred technical scheme, described cladding adopts layer 2-3 single track laser cladding layer.
As preferred technical scheme, the shielding gas using in described cladding process is helium.
Beneficial effect
(1) pump in the present invention is with machine envelope axle sleeve by after laser melting coating modification, and hardness can reach HRC72-76, the acid-basicity corrosion of wear-resistant resistance to various chemical mediums of while.
(2) alloying of Ni-based composite powder of the present invention is to use Mo, Cr, Fe element to carry out austenite solution strengthening; By Ti acquisition intermetallic compound Y ' phase precipitation strength; Add B and realize grain-boundary strengthening; Add W and can improve wear resistance; Add rare earth element and improve warm antioxidant and corrodibility.
Brief description of the drawings
In order to be illustrated more clearly in embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiments more of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The process flow sheet of Fig. 1 embodiment of the present invention 1.
Picture in picture mark:
1-laser apparatus, 2-digital control system, 3-cladding layer, 4-digital camera, 5-laser beam, the coaxial automatic powder feeding device of 6-, 7-shielding gas, 8-cladding thickness infrared eye, 9-matrix, 10-molten bath, 11-operator's console, 12-coaxial powder-feeding working head.
Embodiment
To the technical scheme in the embodiment of the present invention be clearly and completely described below, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The equipment using in following embodiment all can be bought and obtain on market.Improvement of the present invention is the fit applications of laser melting coating mode and Ni-based composite powder.Wherein Ni-based composite powder is contriver's process many experiments, the definite end formulation of cost great effort.The alloying of Ni-based composite powder is to use Mo, Cr, Fe element to carry out austenite solution strengthening; By Ti acquisition intermetallic compound Y ' phase precipitation strength; Add B and realize grain-boundary strengthening; Add W and can improve wear resistance; Add rare earth element and improve warm antioxidant and corrodibility.
Embodiment 1
A kind of machine envelope axle sleeve erosion resistant laser cladding method (shown in Figure 1) for pump, comprising:
Step S1: surface treatment is carried out at the erosion resistant position to machine envelope axle sleeve; The monolateral machining of workpiece being specially needing laser melting coating modification becomes groove, and gash depth is 0.3-1.5mm; Use acetone to clean groove, remove surperficial greasy dirt impurity.
Step S2: equipment 2000W high-power semiconductor laser.
Utilize Ni-based composite powder to carry out cladding by laser apparatus at the erosion resistant position after step S1 surface treatment, cladding adopts 2 layers of single track laser cladding layer, uses helium to protect molten bath in cladding process; Output rating is 1500W, and focal length is 160mm, and wavelength is 976nm, and powder sending quantity is 5g/min, and sweep velocity is 12mm/s, and temperature of fusion is 1080 DEG C;
The wherein chemical composition of Ni-based composite powder and the mass percent of component following (granularity of Ni-based composite powder is :-150/+280): C:0.5%, Cr:19%, Si:5%, B:3%, Cu:2%, Mo:4%, Fe:9%, CeO:0.5%, Ti:1%, W:3.5% and Ni: surplus.
Step S3: the machine envelope axle sleeve after step S2 cladding step is carried out to the processing of wet type mill.Quality examination: the machine envelope axle sleeve after cladding is carried out to quality examination, confirm that institute's cladding position quality reaches service requirements.
Embodiment 2
Machine envelope axle sleeve erosion resistant laser cladding method for a kind of pump, comprising:
Step S1: surface treatment is carried out at the erosion resistant position to machine envelope axle sleeve; The monolateral machining of workpiece being specially needing laser melting coating modification becomes groove, and gash depth is 2-4mm; Use acetone to clean groove, remove surperficial greasy dirt impurity.
Step S2: equipment 2000W high-power semiconductor laser.
Utilize Ni-based composite powder to carry out cladding by laser apparatus at the erosion resistant position after step S1 surface treatment, cladding adopts 3 layers of single track laser cladding layer, the thickness of individual layer cladding layer is 0.1-1mm (cladding thickness is according to sweep velocity and powder sending quantity control), uses helium to protect molten bath in cladding process; Output rating is 1800W, and focal length is 260mm, and wavelength is 976nm, and powder sending quantity is 20g/min, and temperature of fusion is 1050 DEG C;
The wherein chemical composition of Ni-based composite powder and the mass percent of component following (granularity of Ni-based composite powder is :-150/+280): C:1%, Cr:14%, Si:3.5%, B:4.5%, Cu:4%, Mo:2%, Fe:8%, CeO:0.3%, Ti:0.5%, W:2.5% and Ni: surplus.
Step S3: the machine envelope axle sleeve after step S2 cladding step is carried out to the processing of wet type mill.Quality examination: the machine envelope axle sleeve after cladding is carried out to quality examination, confirm that institute's cladding position quality reaches service requirements.
Embodiment 3
The process of embodiment 3 and embodiment 1 are same, and its difference is as follows:
Processing parameter in cladding process: output rating is 1600W, focal length is 200mm, and wavelength is 976nm, and powder sending quantity is 15g/min, and sweep velocity is 5mm/s, temperature of fusion is 1060 DEG C.
The chemical composition of Ni-based composite powder and the mass percent of component following (granularity of Ni-based composite powder is :-150/+280): C:0.8%, Cr:16%, Si:4%, B:4%, Cu:3%, Mo:4%, Fe:9%, CeO:0.4%, Ti:0.8%, W:3% and Ni: surplus;
Step S3: the machine envelope axle sleeve after step S2 cladding step is carried out to the processing of wet type mill.Quality examination: the machine envelope axle sleeve after cladding is carried out to quality examination, confirm that institute's cladding position quality reaches service requirements.
Pump in the present invention is with machine envelope axle sleeve by after laser melting coating modification, and hardness can reach HRC72-76, the acid-basicity corrosion of resistance to various chemical mediums.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (6)
1. a machine envelope axle sleeve erosion resistant laser cladding method for pump, comprising:
Surface treatment is carried out at erosion resistant position to machine envelope axle sleeve;
Utilize Ni-based composite powder to carry out cladding by laser apparatus at the described erosion resistant position after surface treatment; Wherein output rating is 1500-1800W, and focal length is 160-260mm, and powder sending quantity is 5-20g/min, and temperature of fusion is 1050-1080 DEG C; The chemical composition of described Ni-based composite powder and the mass percent of component are as follows: C:0.5-1%, Cr:14-19%, Si:3.5-5%, B:3-4.5%, Cu:2-4%, Mo:2-4%, Fe:8-9%, CeO:0.3-0.5%, Ti:0.5-1%, W:2.5-3.5% and Ni: surplus;
Described machine envelope axle sleeve after cladding step is carried out to the processing of wet type mill, after Check processing.
2. machine envelope axle sleeve erosion resistant laser cladding method for a kind of pump according to claim 1, is characterized in that, the wavelength of described laser apparatus is 976nm.
3. machine envelope axle sleeve erosion resistant laser cladding method for a kind of pump according to claim 1, is characterized in that, the sweep velocity of described laser apparatus is 0-12mm/s.
4. machine envelope axle sleeve erosion resistant laser cladding method for a kind of pump according to claim 1, is characterized in that, the granularity of described Ni-based composite powder is :-150/+280.
5. machine envelope axle sleeve erosion resistant laser cladding method for a kind of pump according to claim 1, is characterized in that, described cladding adopts layer 2-3 single track laser cladding layer.
6. machine envelope axle sleeve erosion resistant laser cladding method for a kind of pump according to claim 1, is characterized in that, the shielding gas using in described cladding process is helium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410209149.0A CN103981518B (en) | 2014-05-16 | 2014-05-16 | Pump seals axle sleeve erosion resistant laser cladding method with machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410209149.0A CN103981518B (en) | 2014-05-16 | 2014-05-16 | Pump seals axle sleeve erosion resistant laser cladding method with machine |
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| CN103981518B CN103981518B (en) | 2017-06-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106676515A (en) * | 2015-11-11 | 2017-05-17 | 上海大陆天瑞激光表面工程有限公司 | Laser seal coating material for turbine cylinder middle split face of gas turbine |
| CN106756994A (en) * | 2016-12-02 | 2017-05-31 | 江苏科技大学 | A kind of nickel-based composite pow-der of laser cladding coating and the method for prepares coating |
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| CN106676515A (en) * | 2015-11-11 | 2017-05-17 | 上海大陆天瑞激光表面工程有限公司 | Laser seal coating material for turbine cylinder middle split face of gas turbine |
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| CN106756994A (en) * | 2016-12-02 | 2017-05-31 | 江苏科技大学 | A kind of nickel-based composite pow-der of laser cladding coating and the method for prepares coating |
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| CN103981518B (en) | 2017-06-27 |
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