CN112663103A - Method for repairing surface damage of ultrahigh-strength steel containing chromium coating - Google Patents
Method for repairing surface damage of ultrahigh-strength steel containing chromium coating Download PDFInfo
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- 229910000797 Ultra-high-strength steel Inorganic materials 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 54
- 239000011248 coating agent Substances 0.000 title claims abstract description 37
- 238000000576 coating method Methods 0.000 title claims abstract description 37
- 239000011651 chromium Substances 0.000 title claims abstract description 34
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 30
- 238000007747 plating Methods 0.000 claims abstract description 99
- 230000008021 deposition Effects 0.000 claims abstract description 92
- 239000000463 material Substances 0.000 claims abstract description 37
- 230000008439 repair process Effects 0.000 claims abstract description 25
- 239000001257 hydrogen Substances 0.000 claims abstract description 17
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 17
- 230000008569 process Effects 0.000 claims abstract description 15
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 230000007704 transition Effects 0.000 claims abstract description 14
- 238000000151 deposition Methods 0.000 claims description 88
- 230000007547 defect Effects 0.000 claims description 35
- 230000003213 activating effect Effects 0.000 claims description 28
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 27
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 24
- 230000004913 activation Effects 0.000 claims description 17
- 239000012190 activator Substances 0.000 claims description 14
- 238000004140 cleaning Methods 0.000 claims description 14
- 229910052759 nickel Inorganic materials 0.000 claims description 13
- 238000000227 grinding Methods 0.000 claims description 12
- 238000005498 polishing Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 238000007689 inspection Methods 0.000 claims description 6
- 238000009713 electroplating Methods 0.000 claims description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- 238000010892 electric spark Methods 0.000 claims description 3
- 239000000654 additive Substances 0.000 claims description 2
- 230000000996 additive effect Effects 0.000 claims description 2
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 238000011282 treatment Methods 0.000 claims 3
- 238000000746 purification Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000011065 in-situ storage Methods 0.000 abstract 1
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- 238000005406 washing Methods 0.000 description 16
- 239000003795 chemical substances by application Substances 0.000 description 6
- 229910018104 Ni-P Inorganic materials 0.000 description 5
- 229910018536 Ni—P Inorganic materials 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
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- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to the field of surface repair of ultrahigh-strength steel, in particular to a repair method combining micro-arc deposition and brush plating technology for the surface of the ultrahigh-strength steel containing a chromium coating. The low hydrogen embrittlement material is firstly deposited on the repaired surface by the micro-arc deposition technology to realize in-situ thickening, the workpiece does not need to be heated in the process, and then the Ni-based coating is electroplated on the micro-arc deposition bottom layer, so that the micro-arc deposition surface and the coating are perfectly combined, and the initial state is recovered. The method can be used for repairing the surface of the ultrahigh-strength steel, solves the problems of easy hydrogen embrittlement generation, poor bonding force and poor bonding of the repair layer and the chromium layer transition section in the surface repairing process of the ultrahigh-strength steel, and can effectively repair the surface of the ultrahigh-strength steel by adopting a process combining micro-arc deposition and brush plating.
Description
Technical Field
The invention relates to the field of surface repair of ultrahigh-strength steel, in particular to a method for repairing the surface of the ultrahigh-strength steel by micro-arc combined brush plating.
Background
The ultrahigh-strength steel has low alloy element, low cost and simple production process, is widely used for manufacturing airplane girders, landing gear members, engine shafts, high-strength bolts, solid rocket engine shells, chemical high-pressure containers and the like, plays an important role in the manufacturing industry, is mainly used for manufacturing stressed structural members bearing impact loads, traction loads, sliding loads and the like, and is easy to generate stress concentration and abrasion in service under special working environments such as vibration, impact, friction and the like, thereby causing the damage of parts.
Simultaneously for improving super high strength steel surface wear resistance, the Cr layer also can be electroplated on many part surfaces, improves the wearability, but in the use, because reasons such as improper operation or equipment trouble can cause the damage to the Cr layer, expose the body even, reduced performance such as its wearability and corrosion resistance, so at present very urgent to super high strength steel surface repair's demand.
Disclosure of Invention
The invention aims to provide a method for repairing the surface damage of ultra-high strength steel containing a chromium coating, which solves the problems of easy hydrogen embrittlement and poor binding force in the process of repairing the surface of the ultra-high strength steel.
The technical scheme of the invention is as follows:
a method for repairing surface damage of ultra-high strength steel containing chromium coating is characterized in that after a defect position on the surface of the ultra-high strength steel is subjected to micro-arc deposition with a certain thickness, a wear-resistant coating is brush-plated on the deposition surface. Micro-arc deposition refers to: rotating or vibrating with the deposited material as anode and the deposited workpiece as cathode and depositing certain thickness on the surface; the brush plating of the wear-resistant coating on the surface refers to: and plating the wear-resistant coating on the surface of the micro-arc deposition coating by using an electric brush plating process, so that the wear resistance and the size of the plated coating meet the requirements of parts.
According to the method for repairing the surface damage of the ultra-high strength steel containing the chromium coating, the micro-arc deposition material is a low hydrogen embrittlement material. The low hydrogen embrittlement material is 41/2Cr-Mo steel or low-hydrogen brittle high-temperature alloy steel GH 4169.
According to the method for repairing the surface damage of the ultra-high strength steel containing the chromium coating, equipment selected for micro-arc deposition is a multifunctional micro-arc additive manufacturing machine or an ultrasonic electric spark surfacing machine, and is provided with an argon protection device.
According to the method for repairing the damage to the surface of the ultra-high strength steel containing the chromium coating, the surface of a defect needs to be polished before micro-arc deposition, so that the edge and the bottom of the defect are in arc transition and have no sharp corner, and the polished surface needs to be cleaned by acetone and then dried; before electric brush plating, the micro-arc deposition surface needs to be polished to be smooth, the edge and the bottom are in arc transition and have no sharp corner, and after polishing, the micro-arc deposition surface needs to be cleaned by acetone and then dried.
According to the method for repairing the surface damage of the ultra-high strength steel containing the chromium coating, during micro-arc deposition, micro-arc spark discharge is carried out under the protection of Ar gas, the power supply discharge frequency is 1500-1800 Hz, the voltage is 50V-80V, the rotating speed of a deposition material rod during rotation is 1000-1400 rpm, the vibration speed of the deposition material rod during vibration is 10000-30000 times/second, and the deposition thickness is about 0.05-0.30 mm.
According to the method for repairing the surface damage of the ultra-high strength steel containing the chromium coating, during electric brush plating, the surface is firstly cleaned according to the method, and then the method is carried out according to the following steps:
and (3) using an electron microscope and a plating pen as a cathode and a workpiece as an anode, wherein the voltage is 10-12V, the time is 15-30 s, the speed is 9-15 m/min, and the workpiece is washed clean by clean water after being electrified.
Activating, namely activating by using an activator No. 2, a plating pen as a cathode, a workpiece as an anode, a voltage of 10-12V, a time of 10-15 s and a speed of 9-18 m/min, and washing by using clear water after activation;
activating, namely, using an activating agent No. 3, a plating pen as a cathode, a workpiece as an anode, a voltage of 10-12V, a time of 10-15 s and a speed of 9-18 m/min, and washing the workpiece clean with clear water after activation;
activating, namely, adopting an aluminum activating agent, taking a plating pen as a cathode, taking a workpiece as an anode, performing voltage of 10-12V, time of 10-15 s and speed of 9-18 m/min, and washing the workpiece clean with clear water after activation;
plating bottom nickel, wherein the plating solution is special nickel, the plating pen is an anode, the workpiece is a cathode, the voltage is 10-12V, the time is 30-60 s, the speed is 9-18 m/min, and the workpiece is washed clean by clear water after electroplating;
plating an electroplating layer, wherein the plating solution is Ni-P plating solution, the plating pen is an anode, the workpiece is a cathode, the voltage is 12-14V, the time is 300-600 s, the speed is 9-18 m/min, and the electroplating layer is washed clean by clear water after electroplating;
according to the method for repairing the surface damage of the ultra-high strength steel containing the chromium coating, the average thickness of a micro-arc deposition layer can be 0.01-0.20 mm as required, the micro-arc deposition layer is metallurgically bonded with a base material, no obvious interface exists, and the tissue transition is uniform; the thickness of the brush plating layer can be 0.02-0.10 mm as required, and the surface is compact.
The method for repairing the surface damage of the ultra-high strength steel containing the chromium coating comprises the following steps: the method includes firstly grinding the position of the defect → secondly cleaning the surface of the workpiece → thirdly micro-arc deposition → fourthly grinding and cleaning the surface of the deposition → fifthly electro-brush plating → sixthly fine repair inspection.
The design idea of the invention is as follows:
the invention discloses a micro-arc deposition and brush plating combined technical method for the surface of ultrahigh-strength steel, which is used for brush plating a wear-resistant coating on the deposition surface after micro-arc deposition with a certain thickness. The method can solve the problems of easy hydrogen embrittlement, poor bonding force and poor bonding of the repair layer and the chromium layer transition section in the repair process of the surface of the ultrahigh-strength steel, and can effectively repair the surface defects of the ultrahigh-strength steel by adopting a micro-arc deposition and brush plating technology.
The invention has the advantages and beneficial effects that:
the ultrahigh-strength steel has the characteristics of high strength, high reliability, accurate size and the like. The ultrahigh-strength steel is widely applied to the fields of automobiles and aerospace, and is precise in manufacturing, once the surface of the ultrahigh-strength steel is abraded, the ultrahigh-strength steel is difficult to repair locally by applying a common repair method due to the existence of a Cr layer on the surface, the replacement period is long, and some defects even cause direct scrapping of parts, so that time and fund are wasted. By adopting the micro-arc deposition combined with the electric spark technology, the quick repair of the surface defects of the ultrahigh-strength steel can be realized, and the method has the following characteristics:
(1) the workpiece does not need to be heated integrally, the repairing bottom layer is in metallurgical bonding, the heat input is small, and the deformation is small.
(2) Defects of different depths can be repaired.
(3) The equipment is simple, and the brush plating adopts the plating solution without pollution hazard, thereby being economic and environment-friendly.
(4) The application avoids using low-hydrogen brittle cadmium which is a severely polluted liquid and can cause cancer, and is an environment-friendly repair technology.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1: the macroscopic surface of the invention before and after repair is shown in the figure;
FIG. 2: the invention is a representation of the microscopic cross section after modification.
Detailed Description
In the specific implementation process, after the ultrahigh-strength steel surface defect position is subjected to micro-arc deposition with a certain thickness, the surface of the ultrahigh-strength steel surface defect position is subjected to brush plating of a wear-resistant coating, so that the hardness, the wear resistance, the corrosion resistance and the like of the ultrahigh-strength steel surface defect position meet the requirements.
The surface repairing and processing process of the ultrahigh-strength steel comprises the following steps: the method includes firstly grinding the position of the defect → secondly cleaning the surface of the workpiece → thirdly micro-arc deposition → fourthly grinding and cleaning the surface of the deposition → fifthly electro-brush plating → sixthly fine repair inspection.
Wherein:
(1) before micro-arc deposition, the surface of a defect needs to be polished, so that the edge and the bottom of the defect are in arc transition and have no sharp corner, and after polishing, the defect needs to be cleaned by acetone and then dried; before electric brush plating, the micro-arc deposition surface needs to be polished to be smooth, the edge and the bottom are in arc transition and have no sharp corner, and after polishing, the micro-arc deposition surface needs to be cleaned by acetone and then dried.
(2) The micro-arc deposition material of the ultrahigh strength steel is a low hydrogen embrittlement material.
(3) During micro-arc deposition, micro-arc spark discharge is carried out under the protection of Ar gas, the power supply discharge frequency is 1500-1800 Hz, the voltage is 50V-80V, the rotating speed of the deposition material rod during rotation is 1000-1400 rpm, the vibration speed of the deposition material rod during vibration is 10000-30000 times/second, and the deposition thickness is about 0.05-0.30 mm.
(4) The parameters of the electric brush plating process are as follows: firstly, an electron microscope takes a plating pen as a cathode and a workpiece as an anode, the voltage is 10-12V, the time is 15-30 s, the speed is 9-15 m/min, and the workpiece is washed clean by clean water after being electrified. Secondly, activating, namely activating by adopting an activator No. 2, a plating pen as a cathode, a workpiece as an anode, a voltage of 10-12V, a time of 10-15 s and a speed of 9-18 m/min, and washing by using clear water after activation; activating, namely activating by using an activator No. 3, a plating pen as a cathode, a workpiece as an anode, a voltage of 10-12V, a time of 10-15 s and a speed of 9-18 m/min, and washing by using clear water after activation; activating, namely, using an aluminum activating agent, using a plating pen as a cathode, using a workpiece as an anode, using a voltage of 10-12V, a time of 10-15 s, and a speed of 9-18 m/min, and washing the workpiece clean with clear water after activation; plating bottom nickel, wherein the plating solution is special nickel, the plating pen is an anode, the workpiece is a cathode, the voltage is 10-12V, the time is 30-60 s, the speed is 9-18 m/min, and the plated bottom nickel is washed clean by clean water; sixthly, plating an electroplated layer, wherein the plating solution is Ni-P plating solution, the plating pen is an anode, the workpiece is a cathode, the voltage is 12-14V, the time is 300-600 s, the speed is 9-18 m/min, and the electroplated layer is washed clean by clean water after plating.
Example 1
The embodiment provides a method for repairing the surface damage of ultra-high strength steel containing a chromium coating, which comprises the following steps: the method includes firstly grinding the position of the defect → secondly cleaning the surface of the workpiece → thirdly micro-arc deposition → fourthly grinding and cleaning the surface of the deposition → fifthly electro-brush plating → sixthly fine repair inspection.
Wherein: before micro-arc deposition, the surface of a defect needs to be polished, so that the edge and the bottom of the defect are in arc transition and have no sharp corner, and after polishing, the defect needs to be cleaned by acetone and then dried; before electric brush plating, the micro-arc deposition surface needs to be polished to be smooth, the edge and the bottom are in arc transition and have no sharp corner, and after polishing, the micro-arc deposition surface needs to be cleaned by acetone and then dried.
The micro-arc deposition material of the ultrahigh strength steel is a low hydrogen embrittlement material. The low-hydrogen brittle material is JYJ-D2 material, and comprises the components of C less than or equal to 0.03, Si less than or equal to 1.0, Mn less than or equal to 2.0, Cr: 16-18, Ni: 10-14, Mo: 2-3, S is less than or equal to 0.03, and P is less than or equal to 0.045.
During micro-arc deposition, micro-arc spark discharge is carried out under the protection of Ar gas, the power supply discharge frequency is 1500-1800 Hz, the voltage is 50V-80V, the rotating speed of the deposition material rod during rotation is 1000-1400 rpm, the vibration speed of the deposition material rod during vibration is 10000-30000 times/second, and the deposition thickness is about 0.05-0.30 mm.
(5) The parameters of the electric brush plating process are as follows: firstly, an electron microscope takes a plating pen as a cathode and a workpiece as an anode, the voltage is 10V, the time is 20s, the speed is 9m/min, and the workpiece is washed clean by clean water after being electrified. Secondly, activating, namely activating by adopting an activator No. 2, a plating pen as a cathode, a workpiece as an anode, a voltage of 10V, a time of 10-15 s and a speed of 9m/min, and then washing the workpiece by clear water; activating, namely activating by using an activator No. 3, a plating pen as a cathode, a workpiece as an anode, a voltage of 10-12V, a time of 10-15 s and a speed of 9m/min, and washing by using clear water after activation; activating, namely, using an aluminum activating agent, using a plating pen as a cathode, using a workpiece as an anode, performing voltage of 10-12V, time of 10-15 s, and speed of 9m/min, and washing the workpiece clean with clear water after activation; fifthly, plating bottom nickel, wherein the plating solution is special nickel, the plating pen is an anode, the workpiece is a cathode, the voltage is 10V, the time is 30-60 s, the speed is 9m/min, and the plated workpiece is washed clean by clean water; sixthly, plating an electroplated layer, wherein the plating solution is Ni-P plating solution, the plating pen is an anode, the workpiece is a cathode, the voltage is 12-14V, the time is 300-600 s, the speed is 9m/min, and the electroplated layer is washed clean by clean water after plating.
The micro-arc deposition layer is well metallurgically bonded with the base material before and after repair, the bonding force is good, various performances of the micro-arc deposition layer are guaranteed in the using process, and meanwhile, the surface layer brush plating layer and the micro-arc deposition layer are also tightly bonded together without any microscopic defects.
Example 2
The embodiment provides a method for repairing the surface damage of ultra-high strength steel containing a chromium coating, which comprises the following steps: the method includes firstly grinding the position of the defect → secondly cleaning the surface of the workpiece → thirdly micro-arc deposition → fourthly grinding and cleaning the surface of the deposition → fifthly electro-brush plating → sixthly fine repair inspection.
Wherein: before micro-arc deposition, the surface of a defect needs to be polished, so that the edge and the bottom of the defect are in arc transition and have no sharp corner, and after polishing, the defect needs to be cleaned by acetone and then dried; before electric brush plating, the micro-arc deposition surface needs to be polished to be smooth, the edge and the bottom are in arc transition and have no sharp corner, and after polishing, the micro-arc deposition surface needs to be cleaned by acetone and then dried.
The micro-arc deposition material of the ultrahigh strength steel is a low hydrogen embrittlement material. The low hydrogen embrittlement material is 41/2Cr-Mo steel.
During micro-arc deposition, micro-arc spark discharge is carried out under the protection of Ar gas, the power supply discharge frequency is 1500-1800 Hz, the voltage is 50V-80V, the rotating speed of the deposition material rod during rotation is 1000-1400 rpm, the vibration speed of the deposition material rod during vibration is 10000-30000 times/second, and the deposition thickness is about 0.05-0.30 mm.
The parameters of the electric brush plating process are as follows: firstly, cleaning by electricity, taking a plating pen as a cathode and a workpiece as an anode, applying a voltage of 10V for 20s, and washing by clear water after cleaning by electricity at a speed of 13 m/min. Secondly, activating, namely, adopting an activator No. 2, a plating pen as a cathode, a workpiece as an anode, applying a voltage of 10V for 15s at a speed of 11m/min, and washing the workpiece clean with clear water after activation; activating, namely activating by adopting an activator No. 3, a plating pen as a cathode, a workpiece as an anode, a voltage of 10V, a time of 14s and a speed of 11m/min, and then washing by clear water; activation, namely, adopting an aluminum activating agent, taking a plating pen as a cathode, taking a workpiece as an anode, and washing the workpiece with clear water after activation at the voltage of 10V, the time s and the speed of 12 m/min; fifthly, plating bottom nickel, wherein the plating solution is special nickel, the plating pen is an anode, the workpiece is a cathode, the voltage is 12V, the time is 60s, the speed is 12m/min, and the plating solution is washed clean by clean water; sixthly, plating an electroplated layer, wherein the plating solution is Ni-P plating solution, the plating pen is an anode, the workpiece is a cathode, the voltage is 12-14V, the time is 300-600 s, the speed is 9-18 m/min, and the electroplated layer is washed clean by clean water after plating.
The macro surface condition before and after the repair of the embodiment is shown in fig. 1, the micro cross section condition after the repair is shown in fig. 2, and the micro arc deposition layer and the base material have excellent metallurgical bonding and excellent bonding force, so that various performances of the micro arc deposition layer and the base material in the use process are ensured, and meanwhile, the surface layer brush plating layer and the micro arc deposition layer are also tightly bonded together without any micro defects.
Example 3
The embodiment provides a method for repairing the surface damage of ultra-high strength steel containing a chromium coating, which comprises the following steps: the method includes firstly grinding the position of the defect → secondly cleaning the surface of the workpiece → thirdly micro-arc deposition → fourthly grinding and cleaning the surface of the deposition → fifthly electro-brush plating → sixthly fine repair inspection.
Wherein: before micro-arc deposition, the surface of a defect needs to be polished, so that the edge and the bottom of the defect are in arc transition and have no sharp corner, and after polishing, the defect needs to be cleaned by acetone and then dried; before electric brush plating, the micro-arc deposition surface needs to be polished to be smooth, the edge and the bottom are in arc transition and have no sharp corner, and after polishing, the micro-arc deposition surface needs to be cleaned by acetone and then dried.
The micro-arc deposition material of the ultrahigh strength steel is a low hydrogen embrittlement material. The low hydrogen embrittlement material is low hydrogen embrittlement high temperature alloy steel such as GH 4169.
During micro-arc deposition, micro-arc spark discharge is carried out under the protection of Ar gas, the power supply discharge frequency is 1500-1800 Hz, the voltage is 50V-80V, the rotating speed of the deposition material rod during rotation is 1000-1400 rpm, the vibration speed of the deposition material rod during vibration is 10000-30000 times/second, and the deposition thickness is about 0.05-0.30 mm.
The parameters of the electric brush plating process are as follows: firstly, an electron microscope takes a plating pen as a cathode and a workpiece as an anode, the voltage is 12V, the time is 30s, the speed is 15m/min, and the workpiece is washed clean by clean water after being electrified. Secondly, activating, namely, adopting an activator No. 2, a plating pen as a cathode, a workpiece as an anode, applying a voltage of 12V, lasting for 10s and at a speed of 18m/min, and washing the workpiece clean by clear water after activation; activating, namely activating by using an activator No. 3, a plating pen as a cathode, a workpiece as an anode, a voltage of 11V, a time of 10s and a speed of 18m/min, and then washing by using clear water; activation, namely, adopting an aluminum activating agent, taking a plating pen as a cathode, taking a workpiece as an anode, carrying out activation at a voltage of 12V for 10s and a speed of 18m/min, and washing the workpiece with clear water; fifthly, plating bottom nickel, wherein the plating solution is special nickel, the plating pen is an anode, the workpiece is a cathode, the voltage is 12V, the time is 30s, the speed is 18m/min, and the plating solution is washed clean by clear water; sixthly, plating an electroplated layer, wherein the plating solution is Ni-P plating solution, the plating pen is an anode, the workpiece is a cathode, the voltage is 14V, the time is 300s, the speed is 18m/min, and the electroplated layer is washed clean by clean water after plating.
The micro-arc deposition layer is well metallurgically bonded with the base material before and after repair, the bonding force is good, various performances of the micro-arc deposition layer are guaranteed in the using process, and meanwhile, the surface layer brush plating layer and the micro-arc deposition layer are also tightly bonded together without any microscopic defects.
Claims (10)
1. A method for repairing the surface damage of the ultra-high strength steel containing the chromium coating is characterized in that micro-arc deposition is carried out on the surface defect position of the ultra-high strength steel containing the chromium coating, and the repair is finished by brush plating the wear-resistant coating on the micro-arc deposition surface.
2. The method for repairing the surface damage of the ultra-high strength steel with the chromium coating according to claim 1, wherein the micro-arc deposition specifically comprises: the deposition material is used as an anode to rotate or vibrate, the ultrahigh-strength steel containing the chromium coating is used as a cathode, and a certain thickness is deposited on the surface of the ultrahigh-strength steel containing the chromium coating.
3. The method for repairing damage to the surface of ultra-high strength steel having a chromium coating according to claim 2, wherein the micro-arc deposited material is a low hydrogen embrittlement material.
4. The method for repairing damaged surface of ultra-high strength steel with chromium coating according to claim 1, wherein the selected equipment for micro-arc deposition is a multifunctional micro-arc additive manufacturing machine or an ultrasonic electric spark surfacing machine, and is provided with an argon protection device.
5. The method for repairing the damage of the surface of the ultra-high strength steel with the chromium coating according to claim 1, wherein the surface of the defect needs to be polished before micro-arc deposition, so that the edge and the bottom of the defect are in arc transition, and the defect needs to be cleaned by acetone and dried after polishing; before electric brush plating, the micro-arc deposition surface needs to be polished to be smooth, the edge and the bottom of the micro-arc deposition surface are in arc transition, and after polishing, the micro-arc deposition surface needs to be cleaned by acetone and then dried.
6. The method for repairing damage to the surface of ultra-high strength steel having a chromium coating according to claim 1, wherein during micro-arc deposition, micro-arc spark discharge is performed under the protection of Ar gas, the power discharge frequency is 1500-1800 Hz, the voltage is 50V-80V, the rotating speed of the deposition material rod during rotation is 1000-1400 rpm, the vibration speed of the deposition material rod during vibration is 10000-30000 times/second, and the deposition thickness is about 0.05-0.30 mm.
7. The method for repairing surface damage of ultra-high strength steel having a chromium plated layer according to claim 1, wherein said brush plating comprises electron microscope treatment, 3 activation treatments, base nickel plating and plating layer; wherein, during electric purification and activation treatment, the voltage is 10-12V, the time is 15-30 s, and the speed is 9-15 m/min; when the bottom nickel is plated, the voltage is 10-12V, the time is 30-60 s, and the speed is 9-18 m/min; when plating an electroplating layer, the voltage is 12-14V, the time is 300-600 s, and the speed is 9-18 m/min.
8. The method for repairing surface damage of ultra-high strength steel having a chromium plated layer according to claim 7, wherein the first activating activator is activator # 2; activating the activator for the second time to obtain activator # 3; the third activation activator is aluminum.
9. The method for repairing the surface damage of the ultrahigh-strength steel with the chromium coating according to claim 1, wherein the thickness of the brush-plated wear-resistant coating is 0.02-0.10 mm.
10. The method for repairing surface damage of ultra-high strength steel with a chromium coating according to claim 1, wherein the ultra-high strength steel surface repairing process comprises: the method includes firstly grinding the position of the defect → secondly cleaning the surface of the workpiece → thirdly micro-arc deposition → fourthly grinding and cleaning the surface of the deposition → fifthly electro-brush plating → sixthly fine repair inspection.
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| CN202011095416.8A CN112663103A (en) | 2020-10-14 | 2020-10-14 | Method for repairing surface damage of ultrahigh-strength steel containing chromium coating |
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| CN202011095416.8A CN112663103A (en) | 2020-10-14 | 2020-10-14 | Method for repairing surface damage of ultrahigh-strength steel containing chromium coating |
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Citations (4)
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| CN101444869A (en) * | 2008-12-26 | 2009-06-03 | 中国人民解放军第五七一九工厂 | Non-distortion repairing method for micro-damage of casting alloy part |
| CN101514467A (en) * | 2009-02-27 | 2009-08-26 | 西北工业大学 | Method for repairing generator shaft abrasion error fast |
| CN110468409A (en) * | 2019-07-20 | 2019-11-19 | 国营芜湖机械厂 | A kind of laser combined-repair method for shell inner hole surface corrosion |
| CN110653436A (en) * | 2019-10-30 | 2020-01-07 | 常州工学院 | Brush plating-electric spark deposition composite strengthening processing method |
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- 2020-10-14 CN CN202011095416.8A patent/CN112663103A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101444869A (en) * | 2008-12-26 | 2009-06-03 | 中国人民解放军第五七一九工厂 | Non-distortion repairing method for micro-damage of casting alloy part |
| CN101514467A (en) * | 2009-02-27 | 2009-08-26 | 西北工业大学 | Method for repairing generator shaft abrasion error fast |
| CN110468409A (en) * | 2019-07-20 | 2019-11-19 | 国营芜湖机械厂 | A kind of laser combined-repair method for shell inner hole surface corrosion |
| CN110653436A (en) * | 2019-10-30 | 2020-01-07 | 常州工学院 | Brush plating-electric spark deposition composite strengthening processing method |
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| 张彦华编著: "焊接力学与结构完整性原理", 31 August 2007, 北京航空航天大学出版社，第1版, pages: 253 * |
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