CN100503886C - Self-lubricating spray welding iron-base alloy powder for sucker rod coupling - Google Patents
Self-lubricating spray welding iron-base alloy powder for sucker rod coupling Download PDFInfo
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- CN100503886C CN100503886C CNB2007100647312A CN200710064731A CN100503886C CN 100503886 C CN100503886 C CN 100503886C CN B2007100647312 A CNB2007100647312 A CN B2007100647312A CN 200710064731 A CN200710064731 A CN 200710064731A CN 100503886 C CN100503886 C CN 100503886C
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Abstract
The self-lubricating spray welding iron-base alloy powder for sucker rod coupling consists of FeS powder in 5-30 wt% and Fe55 self-fluxing alloy powder in 70-95 wt%. The two kinds of powder are mixed just before being used in the spray welding of the surface coating. The spray welded sucker rod coupling has raised antiwear performance and obviously improved self-lubricating performance, and the spray welded coating may be used in replacing nickel-base alloy coating for the effective protection of coupling and oil pipe.
Description
Technical field
The present invention relates to a kind of self-lubricating spray welding iron-base alloy powder for sucker rod coupling.
Background technology
Rod-pumped well all is the main oil production method in domestic and international oil field all the time, sucker-rod coupling then is the parts of a key in the rod-pumped well, it plays a part to connect sucker rod to the oil well pump transferring power, particularly along with being on the increase of current dark oil well, the effect of sucker-rod coupling and performance are just day by day important.Yet for the comparatively slight circumstances of corrosive environment, self eccentric wear of box cupling is exactly the major cause that causes rod parting; And box cupling can cause the oil pipe perforation during to the serious wear of oil pick-up tube, and the both can cause the stopping production of oil well.
The oil field is adopted at present and is connected centralizer and solve above problem in the mode of coupling surface surfacing nickel-base alloy near box cupling.The initial stage of the use of centralizer can be played the effect of expectation, but using the later stage problem more, also may cause wearing and tearing that pump is missed, too much centralizer can also increase oil pumper load and piston effect on the contrary can sinker bar etc. as self wearing and tearing back box cupling and oil pipe still will wear and tear, the wear and tear abrasive dust that forms.Box cupling behind the coupling surface surfacing nickel-base alloy has well solved the wear problem of box cupling self, makes that the disconnected problem of taking off of sucker rod junction is effectively solved.The coating that is compounded with simultaneously the antifriction element in nickel-base alloy also can reduce the wearing and tearing to tube inner wall to a certain extent, but from result of use, find that still there is the problem of worn out oil pipe in this type of alloy coat box cupling, particularly this situation appearance of the inclination section in the pit shaft is more, illustrates that the performance of this coating minimizing tube inner wall wearing and tearing still has much room for improvement.In addition, along with constantly riseing of nickel base powder price on the market, the application of Ni based spray-welded powder also has been subjected to bigger restriction, awaits developing the surfacing powder of high-performance and low-cost.
Summary of the invention
The purpose of this invention is to provide a kind of self-lubricating spray welding iron-base alloy powder for sucker rod coupling at low corrosion hole condition, this surfacing powder is coated in the sucker-rod coupling surface by the mode of surfacing, can improve the wear resisting property of box cupling greatly, can significantly reduce the wearing and tearing of box cupling simultaneously oil pipe.
For achieving the above object, the present invention adopts following design: a kind of self-lubricating spray welding iron-base alloy powder for sucker rod coupling, it is characterized in that this surfacing powder is mixed by the FeS powder of 5%～30% quality percentage composition and the Fe55 self-fluxing alloy powder of 70%～95% quality percentage composition.
This surfacing powder is mixed by the FeS powder of 5% quality percentage composition and the Fe55 self-fluxing alloy powder of 95% quality percentage composition.
This surfacing powder is mixed by the FeS powder of 10% quality percentage composition and the Fe55 self-fluxing alloy powder of 90% quality percentage composition.
This surfacing powder is mixed by the FeS powder of 30% quality percentage composition and the Fe55 self-fluxing alloy powder of 70% quality percentage composition.
The concrete composition of Fe55 self-fluxing alloy powder is respectively according to the quality percentage composition: carbon 0.8%～4.5%, and chromium 15%～50%, silicon 2.0%～5.0%, boron 1.5%～4.0%, nickel 4.0%～20%, surplus is an iron.
The granularity of FeS powder and Fe55 self-fluxing alloy powder is all 20 μ m～102 μ m.
Each components contents is determined as follows:
At first, choose commercially available common Fe55 self-fluxing alloy powder as the main body composition.The present invention controls its quality percentage composition and accounts for 70%～95% of mixed powder, and purpose is to guarantee that this mixing surfacing powder has self-fluxing nature energy and wear resisting property preferably.Choosing Fe55 self-fluxing alloy powder granularity is 20 μ m～102 μ m, because granularity can cause the powder reduction deposition of splashing towards periphery less than 20 μ m in spraying process, and granularity the inner molten problem that influences coating quality that do not wait thoroughly of powder can occur greater than 102 μ m.
Secondly, choose the FeS powder and add in the surfacing powder, with Fe55 powder uniform mixing as solid lubricant.FeS powder not only cost is low, and is easy to combine with iron-based powder.FeS content is in 5%～30% scope among the present invention, and purpose is to satisfy under the coating wear resistance prerequisite, effectively solves the self-lubricating problem under the different well ' s conditions condition.The granularity of choosing FeS is 20 μ m～102 μ m, the one, and in order to guarantee the uniform mixing with the Fe55 powder, the 2nd, in order to guarantee the deposition of powder in thermal spray process.
Advantage of the present invention is:
1, significantly improved the self-lubricating property of box cupling by the interpolation of FeS self-lubricating powder, effectively reduced wearing and tearing tube inner wall.
2, replace nickel base powder of the prior art by iron-based powder, have very low cost advantage when making box cupling after this self-lubricating iron-base surfacing powder treatment have good abrasion resistance.
3, owing to adopt the self-lubricating spray welding iron-base alloy powder among the present invention in full accord, therefore be highly susceptible to processing and operation to box cupling surface-treated method and common spray welding nickel-base alloy powder coating.
Embodiment
A kind of self-lubricating spray welding iron-base alloy powder for sucker rod coupling is characterized in that, this surfacing powder is formed by the FeS powder of 5%～30% quality percentage composition and the Fe55 self-fluxing alloy powder uniform mixing of 70%～95% quality percentage composition.Two kinds of powder are mixed before use, promptly can be used as the surfacing that final powder is used for the coupling surface coating.The surfacing process is: at first common coupling surface is handled through preheating, spraying and remelting successively, formed the self-lubricating ferrous alloy spray welding layer again on the surface, handle the novel wear resistant box cupling that can obtain having excellent self-lubricating property at last through surface finish.
Box cupling of the present invention is as follows with the preparation process of self-lubricating iron-base surfacing powder:
At first, the configuration of surfacing powder.Choose the general Fe55 self-fluxing alloy powder of selling on the market.Choose the DG.Fe55 self-fluxing alloy powder that Chengdu big photo-thermal spray material company limited produces.Its concrete composition is respectively according to the quality percentage composition: carbon 0.8%～3.5%, and chromium 15%～30%, silicon 2.0%～5.0%, boron 2.0%～3.5%, nickel 10%～20%, surplus is an iron.
Secondly, choose other FeS powder of commercially available analytical pure level, as solid lubricant.With its Fe55 self-fluxing alloy powder uniform mixing, form the box cupling self-lubricating spray welding iron-base alloy powder according to 5%～30% quality percentage composition and 70%～95% quality percentage composition.
Embodiment one, a kind of self-lubricating spray welding iron-base alloy powder for sucker rod coupling, formed by the FeS powder of 5% quality percentage composition and Fe55 self-fluxing alloy powder uniform mixing with 95% quality percentage composition of equigranular, the Fe55 self-fluxing alloy powder is that Chengdu big photo-thermal spray material company limited produces the DG.Fe55 self-fluxing alloy powder; The FeS powder is other FeS powder of analytical pure level general on the market.The granularity of FeS powder and DG.Fe55 self-fluxing alloy powder is all 20 μ m～102 μ m.
Use the method for self-lubricating spray welding iron-base alloy powder for sucker rod coupling spray welding oil pumping rod collar of the present invention as follows: the sucker-rod coupling surface is handled through preheating, spraying and remelting successively, form the self-lubricating ferrous alloy spray welding layer of 0.25～0.60mm on the surface, handle to R through the abrasive band surface finish at last
a0.8 μ m, the novel wear resistant self-lubricating box cupling that can obtain having excellent self-lubricating property.
Embodiment two, a kind of sucker-rod coupling self-lubricating iron-base self-fluxing alloy surfacing powder, form by the FeS powder of 10% quality percentage composition and the Fe55 self-fluxing alloy powder uniform mixing of 90% quality percentage composition, the Fe55 self-fluxing alloy powder is that Chengdu big photo-thermal spray material company limited produces the DG.Fe55 self-fluxing alloy powder, and the FeS powder is other FeS powder of analytical pure level general on the market.The granularity of FeS powder and DG.Fe55 self-fluxing alloy powder is all 20 μ m～102 μ m.
The making method of using self-lubricating spray welding iron-base alloy powder for sucker rod coupling spray welding oil pumping rod collar of the present invention is with embodiment one.
Embodiment three, a kind of sucker-rod coupling self-lubricating iron-base self-fluxing alloy surfacing powder, form by the FeS powder of 30% quality percentage composition and the DG.Fe55 self-fluxing alloy powder uniform mixing of 70% quality percentage composition, the Fe55 self-fluxing alloy powder is that Chengdu big photo-thermal spray material company limited produces the Fe55 self-fluxing alloy powder, and the FeS powder is other FeS powder of analytical pure level general on the market.
Use sucker-rod coupling of the present invention to use the method for end, self-lubricating ferrous alloy spray welding Fen spray welding oil pumping rod collar with embodiment one.
Under laboratory environment, above embodiment is worn and torn and Evaluation of Corrosion Resistance.Wearing test is carried out on MM-200 type friction wear testing machine, the piece sample adopts oil field N80 oil pipe, the ring sample is the thick coating of 45 steel substrate surface spraying welds, 0.25～0.60mm, and coated component is respectively the Fe55 surfacing powder that contains FeS among Ni55 powder and the present invention.Experiment shows; test load at 400N; 400 rev/mins test speed; and under 20 minutes test periods and the water lubricating condition; compare with N80 piece/45 steel Ni55 coating ring friction pairs; embodiment one; two; the abrasion loss of three floating coat ring samples remains basically stable; but the abrasion loss of corresponding piece sample has then reduced nearly 30 times; make the piece sample and the abrasion loss of ring sample be in the same order of magnitude; and found the phenomenon of smearing of FeS layer at the wear surface of piece sample; show that the interpolation of FeS powder has improved the self-lubricating property of alloy spray welding overlay effectively, can reduce the wearing and tearing of oil pipe, oil pipe is formed effective protection.
Claims (4)
1, a kind of self-lubricating spray welding iron-base alloy powder for sucker rod coupling is characterized in that, this surfacing powder is mixed by the FeS powder of 5%～30% quality percentage composition and the Fe55 self-fluxing alloy powder of 70%～95% quality percentage composition;
The concrete composition of described Fe55 self-fluxing alloy powder is respectively according to the quality percentage composition: carbon 0.8%～4.5%, and chromium 15%～50%, silicon 2.0%～5.0%, boron 1.5%～4.0%, nickel 4.0%～20%, surplus is an iron;
The granularity of described FeS powder and Fe55 self-fluxing alloy powder is all 20 μ m～102 μ m.
2, self-lubricating spray welding iron-base alloy powder for sucker rod coupling as claimed in claim 1 is characterized in that, this surfacing powder is mixed by the FeS powder of 5% quality percentage composition and the Fe55 self-fluxing alloy powder of 95% quality percentage composition.
3, self-lubricating spray welding iron-base alloy powder for sucker rod coupling as claimed in claim 1 is characterized in that, this surfacing powder is mixed by the FeS powder of 10% quality percentage composition and the Fe55 self-fluxing alloy powder of 90% quality percentage composition.
4, self-lubricating spray welding iron-base alloy powder for sucker rod coupling as claimed in claim 1 is characterized in that, this surfacing powder is mixed by the FeS powder of 30% quality percentage composition and the Fe55 self-fluxing alloy powder of 70% quality percentage composition.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100647312A CN100503886C (en) | 2007-03-23 | 2007-03-23 | Self-lubricating spray welding iron-base alloy powder for sucker rod coupling |
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| CNB2007100647312A CN100503886C (en) | 2007-03-23 | 2007-03-23 | Self-lubricating spray welding iron-base alloy powder for sucker rod coupling |
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| CN101021007A CN101021007A (en) | 2007-08-22 |
| CN100503886C true CN100503886C (en) | 2009-06-24 |
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| CN102814495B (en) * | 2012-09-10 | 2014-09-17 | 北京科技大学 | Method for improving iron powder forming property |
| CN107052619A (en) * | 2017-03-31 | 2017-08-18 | 安徽再制造工程设计中心有限公司 | A kind of oil drilling tools reparation iron-base self-fluxing alloy powder and its application method |
| CN107937860A (en) * | 2018-01-12 | 2018-04-20 | 河北工业大学 | A kind of preparation method of argon arc remelting Fe base wearing layers |
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