CN109536942A - A kind of power connection fitting laser melting coating surface reinforcing method - Google Patents
A kind of power connection fitting laser melting coating surface reinforcing method Download PDFInfo
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- CN109536942A CN109536942A CN201811285652.9A CN201811285652A CN109536942A CN 109536942 A CN109536942 A CN 109536942A CN 201811285652 A CN201811285652 A CN 201811285652A CN 109536942 A CN109536942 A CN 109536942A
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- Prior art keywords
- power connection
- connection fitting
- laser melting
- melting coating
- corrosion
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- 239000011248 coating agent Substances 0.000 title claims abstract description 33
- 238000000576 coating method Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000008018 melting Effects 0.000 title claims abstract description 22
- 238000002844 melting Methods 0.000 title claims abstract description 22
- 230000003014 reinforcing effect Effects 0.000 title claims description 9
- 239000000843 powder Substances 0.000 claims abstract description 21
- 238000005260 corrosion Methods 0.000 claims abstract description 18
- 238000005253 cladding Methods 0.000 claims abstract description 17
- 229910052796 boron Inorganic materials 0.000 claims abstract description 10
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000007596 consolidation process Methods 0.000 claims abstract description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 230000003746 surface roughness Effects 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims 1
- 229910045601 alloy Inorganic materials 0.000 claims 1
- 238000005096 rolling process Methods 0.000 claims 1
- 229910001092 metal group alloy Inorganic materials 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 7
- 238000002360 preparation method Methods 0.000 abstract description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 12
- 230000007797 corrosion Effects 0.000 description 10
- 238000004372 laser cladding Methods 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 229910052786 argon Inorganic materials 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 5
- 229910052721 tungsten Inorganic materials 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000000320 mechanical mixture Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000010953 base metal Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Laser Beam Processing (AREA)
Abstract
It include that (1) pre-processes the fitting the present invention relates to a kind of method of power connection fitting surface peening；(2) surface consolidation material is prepared；(3) laser melting coating；(4) cladding layer, the metal alloy powders that the composition is 30~50 μm of granularity are handled comprising: basic phase, hard phase and anti-corrosion phase；The basic phase includes Si 2.5~3.0%, C 2.0~2.5%；The hard phase includes W 4.0~6%, Cr 5.8%~7.5%, B 0.3~0.8%；The anti-corrosion mutually includes Al 5.0~6.5%.After laser melting coating preparation process, on electric armour clamp rigid collective surface metallurgical bonding occurs for metal alloy powders, and the mechanical performance of power connection fitting contact surface is greatly improved, to prevent the security risks such as fracture, there is the meaning greatly promoted.
Description
Technical field
The present invention relates to a kind of power connection fitting surface reinforcing methods, belong to field of surface engineering technique, specifically relate to
And a kind of power connection fitting laser melting coating surface reinforcing method.
Background technique
Connection gold utensil is the important connection carrying fitting of transmission line of electricity, it is securely and reliably directly related to transmission line of electricity
Long-term safety operation.Abrasion is the important link for influencing electric armour clamp and being on active service safely.Wherein fretting wear and corrosion wear characteristic
It is two important indicators for determining electric armour clamp service life.Power connection fitting is mainly contacted by surface and realizes two fittings
Between mechanical connection.But during its practical military service, since the contact of bring connection gold utensil is waved in aeolian vibration or strong wind
The friction and wear behavior on surface easily weakens the mechanical performance of contact surface, to bring the security risks such as fracture.And it is extra-high
The characteristics of pressure transmission line is that conveying distance is long, need to undergo different atmospheric environments, and electric armour clamp surface corrosion is be easy to cause to wear,
Accelerate the rate of power connection fitting disabler.Therefore, the abrasion of power connection fitting surface rub resistance and corrosion-resistant mill are improved
Damage performance is fitting design, an important consideration index in process.
Hot spray process is a kind of common surface strengthening technology, and this method is by powdered or Filamentous metal or nonmetallic
Material is heated to melting or semi-molten state, then stays itself or compressed air to be ejected into certain speed by flame pretreated
Matrix surface, deposition and formed have various functions surface covering a kind of technology, make material obtain it is wear-resistant, corrosion-resistant
Equal excellent properties.
But in practical applications, hot spray process also exposes some defects, such as the knot of thermally sprayed coating and base metal
For resultant force based on mechanical interlock, the impact resistance of coating is not high；Secondly, thermal jet layer have certain porosity, consistency compared with
It is low, carry out repairing sizes more difficult to the part of abrasion.
Accordingly, it is desirable to provide one kind can reduce power connection fitting wear condition, while there is stronger operate again
A kind of method of property.
Summary of the invention
It is electrically connected not changing the purpose of the present invention is being surface-treated by laser melting coating to power connection fitting
On the basis of fitting raw material, change physical aspect, the chemical content on surface etc., achieve the purpose that change surface mechanical performance,
To improve the military service performance of power connection fitting.What the present invention was implemented with the following technical solutions:
A kind of method of power connection fitting surface peening, that improves is, method includes the following steps:
(1) fitting is pre-processed；
(2) surface consolidation material is prepared；
(3) laser melting coating；
(4) cladding layer is handled.
A kind of power connection fitting surface peening composition, it is improved in that the composition is 30~50 μ of granularity
The metal alloy powders of m comprising: basic phase, hard phase and anti-corrosion phase；
By mass percentage:
The basic phase includes: Si 2.5~3.0%, C 2.0~2.5%；
The hard phase includes: W 4.0~6%, Cr 5.8%~7.5%, B 0.3~0.8%；
The anti-corrosion mutually includes: Al 5.0~6.5%.
Further,
The basic phase includes: Si 2.5%, C 2.5%；
The hard phase includes: W 5.0%, Cr 7.0%, B 0.8%；
The anti-corrosion mutually includes: Al 5.5%.
Further, the laser melting coating includes:
The shield gas flow rate 15L/min, 1500~2500W of power, 200~600mm/min of scanning speed, powder feeding rate
The laser melting coating for being 5mm × 5mm for 12~18g/min and spot diameter.
Further, (4) handle the cladding layer, and the processing includes that barefoot is cut and rolled.
Further, the cladding layer barefoot is cut into 0.2~0.5mm, until the surface roughness of Ra < 0.8 μm；
Under pretightning force 50-2000N, 5-30 μm of Oscillation Amplitude and 15-80kHz supersonic frequency, rolled with 10-50m/min
Speed carries out multiple tracks and rolls step pitch 0.2-1.5mm.
Compared with the immediate prior art, technical solution provided by the invention has following excellent effect:
(1) metal alloy powders provided by the invention are after laser melting coating preparation process, on electric armour clamp steel matrix surface
Metallurgical bonding occurs, coating hardness is increased to 890HV, the mechanical performance of power connection fitting contact surface is greatly improved, thus
Prevent the security risks such as fracture.
(2) laser melting coating surface reinforcing method provided by the invention can promote to be formed firmly by the addition of W, Cr, B element
Matter phase, improves coating hardness, wearability, and the addition of Al element can be obviously improved the corrosion resistance of coating surface, average corrosion speed
Rate can be reduced to 0.0913, to extend electric armour clamp service life, there is great dissemination.
(3) method that laser melting coating surface reinforcing method provided by the invention combines laser melting coating and ultrasonic burnishing, work
Skill controllability is strong, high production efficiency, it is easy to accomplish automation control has significant practical implementation meaning convenient for promoting.
(4) coating structure provided by the invention by laser melting coating surface peening is fine and close, no significant defect, porosity
It is small, the part of abrasion is easy to carry out repairing sizes, operability is extremely strong in practical applications.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is general
Logical technical staff's every other embodiment obtained, shall fall within the protection scope of the present invention.
Embodiment 1
(1) substrate pretreated
To power connection fitting No. 35 polishings of steel matrix sand for surface paper, derusting, oil removing, smooth finish surface is obtained.
(2) laser melting coating
The composition proportion of laser cladding powder are as follows: 5.5%Al, 5.5%W, 7.0%Cr, 2.5%Si, 2.5%C, 0.8%
B；Surplus is Fe and inevitable impurity.Cladding is subjected to mechanical mixture according to chemical component with metal alloys powder, is mixed
It is dry after closing uniformly, it is fitted into powder feeder.Laser equipment argon gas guard mode in cladding process adjusts laser cladding technological parameter
Are as follows: laser power 2000W, scanning speed 300mm/min, powder feeding rate are 14g/min, and spot diameter is 5mm × 5mm；Argon
Throughput are as follows: 15L/min.Make cladding material and electric armour clamp that metallurgical reaction occur with No. 35 steel under the technological parameter, is formed
Abrasion-proof corrosion-proof erosion resisting coating.
Embodiment 2
(1) substrate pretreated
It polishes power connection fitting 35CrMo steel matrix sand for surface paper, derusting, oil removing, obtains smooth finish surface.
(2) laser melting coating
The composition proportion of laser cladding powder are as follows: 6.0%Al；, 4.5%W, 6.0%Cr, 2.5%Si, 2.5%C, 0.5%
B；Surplus is Fe and inevitable impurity.Cladding is subjected to mechanical mixture according to chemical component with metal alloys powder, is mixed
It is dry after closing uniformly, it is fitted into powder feeder.Laser equipment argon gas guard mode in cladding process adjusts laser cladding technological parameter
Are as follows: laser power 2000W, scanning speed 240mm/min, powder feeding rate are 15g/min, and spot diameter is 5mm × 5mm；Argon
Throughput are as follows: 15L/min.Make cladding material and electric armour clamp 35CrMo steel that metallurgical reaction, shape occur under the technological parameter
At abrasion-proof corrosion-proof erosion resisting coating.
Embodiment 3
(1) substrate pretreated
It polishes power connection fitting Q345R steel matrix sand for surface paper, derusting, oil removing, obtains smooth finish surface.
(2) laser melting coating
The composition proportion of laser cladding powder are as follows: 5.5%Al；, 5.0%W, 7.0%Cr, 2.5%Si, 2.5%C, 0.8%
B；Surplus is Fe and inevitable impurity.Cladding is subjected to mechanical mixture according to chemical component with metal alloys powder, is mixed
It is dry after closing uniformly, it is fitted into powder feeder.Laser equipment argon gas guard mode in cladding process adjusts laser cladding technological parameter
Are as follows: laser power 2000W, scanning speed 300mm/min, powder feeding rate are 12g/min, and spot diameter is 5mm × 5mm；Argon
Throughput are as follows: 15L/min.Make cladding material and electric armour clamp Q345R steel that metallurgical reaction occur under the technological parameter, is formed resistance to
Grind corrosion-resistant finishes.
Data recorded in above-described embodiment are subjected to sorting-out in statistics, laser cladding powder proportion is as shown in table 1:
Table one
| Embodiment label | W/% | Cr/% | B/% | Al/% | Si/% | C/% |
| 1 | 5.5 | 7.0 | 0.8 | 5.5 | 2.5 | 2.5 |
| 2 | 4.5 | 6.0 | 0.5 | 6.0 | 2.5 | 2.5 |
| 3 | 5.0 | 7.0 | 0.8 | 5.5 | 2.5 | 2.5 |
Laser cladding technological parameter is as shown in Table 2:
Table two
Laser cladding layer performance is as shown in Table 3:
Table three
| Embodiment label | Coating hardness | Critical fracture energy release rate | Average corrosion rate |
| 1 | 890HV | 232J/m2 | 0.0986 |
| 2 | 728HV | 392J/m2 | 0.0913 |
| 3 | 812HV | 286J/m2 | 0.0975 |
Through the foregoing embodiment and experimental test data can obtain, after provided above scheme of the invention, design
Cladding powder after providing laser melting coating preparation process, metallurgical bonding occurs in electric armour clamp matrix surface, interface cohesion is strong
Degree is high.The coating structure is fine and close, no significant defect.The addition of element W, Cr, B can form hard phase, improve coating hardness, wear-resisting
Property, and the addition of Al element can be obviously improved the corrosion resistance of coating surface.To reach improve fitting surface abrasion resistance and
The purpose of corrosion resistance.Preparation process is simple, low in cost, convenient for promoting, has significant practical implementation meaning.More than
Described is only presently preferred embodiments of the present invention, is not intended to limit the invention, all within the spirits and principles of the present invention,
Any modification, equivalent replacement, improvement and so on, within accompanying claims protection scope of the present invention.
Claims (6)
1. a kind of method of power connection fitting surface peening, which is characterized in that method includes the following steps:
(1) fitting is pre-processed；
(2) surface consolidation material is prepared；
(3) laser melting coating；
(4) cladding layer is handled.
2. a kind of power connection fitting surface peening composition, which is characterized in that the gold that the composition is 30~50 μm of granularity
Belong to alloy powder comprising: basic phase, hard phase and anti-corrosion phase；
By mass percentage:
The basic phase includes Si 2.5~3.0%, C 2.0~2.5%；
The hard phase includes W 4.0~6%, Cr 5.8%~7.5%, B 0.3~0.8%；
The anti-corrosion mutually includes Al 5.0~6.5%.
3. a kind of power connection fitting surface peening composition as claimed in claim 2, which is characterized in that
The basic phase includes Si 2.5%, C 2.5%；
The hard phase includes W 5.0%, Cr 7.0%, B 0.8%；
The anti-corrosion mutually includes Al 5.5%.
4. a kind of power connection fitting surface reinforcing method as described in claim 1, which is characterized in that the laser melting coating packet
It includes:
The shield gas flow rate 15L/min, 1500~2500W of power, 200~600mm/min of scanning speed, powder feeding rate are 12
The laser melting coating that~18g/min and spot diameter are 5mm × 5mm.
5. a kind of power connection fitting surface reinforcing method as described in claim 1, (4) handle the cladding layer, feature
It is, the processing includes that barefoot is cut and rolled.
6. a kind of power connection fitting surface reinforcing method as described in claim 1, which is characterized in that by the cladding layer barefoot
0.2~0.5mm is cut, until the surface roughness of Ra < 0.8 μm；
Under pretightning force 50-2000N, 5-30 μm of Oscillation Amplitude and 15-80kHz supersonic frequency, with 10-50m/min rolling speed
It carries out multiple tracks and rolls step pitch 0.2-1.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811285652.9A CN109536942B (en) | 2018-10-31 | 2018-10-31 | Laser cladding surface strengthening method for electric power connecting fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811285652.9A CN109536942B (en) | 2018-10-31 | 2018-10-31 | Laser cladding surface strengthening method for electric power connecting fitting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109536942A true CN109536942A (en) | 2019-03-29 |
| CN109536942B CN109536942B (en) | 2023-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811285652.9A Active CN109536942B (en) | 2018-10-31 | 2018-10-31 | Laser cladding surface strengthening method for electric power connecting fitting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110735104A (en) * | 2019-10-28 | 2020-01-31 | 山东大学 | in-situ ultrasonic rolling integrated device and method for thermal spraying |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101643901A (en) * | 2008-08-06 | 2010-02-10 | 沈阳新松机器人自动化股份有限公司 | Alloy coating for crystallizer surface laser cladding and preparation method thereof |
-
2018
- 2018-10-31 CN CN201811285652.9A patent/CN109536942B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101643901A (en) * | 2008-08-06 | 2010-02-10 | 沈阳新松机器人自动化股份有限公司 | Alloy coating for crystallizer surface laser cladding and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110735104A (en) * | 2019-10-28 | 2020-01-31 | 山东大学 | in-situ ultrasonic rolling integrated device and method for thermal spraying |
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| Publication number | Publication date |
|---|---|
| CN109536942B (en) | 2023-11-21 |
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