CN111485137A - Preparation method of coating material for strengthening ocean lifting platform bolt oil cylinder rod - Google Patents
Preparation method of coating material for strengthening ocean lifting platform bolt oil cylinder rod Download PDFInfo
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- CN111485137A CN111485137A CN202010423075.6A CN202010423075A CN111485137A CN 111485137 A CN111485137 A CN 111485137A CN 202010423075 A CN202010423075 A CN 202010423075A CN 111485137 A CN111485137 A CN 111485137A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/055—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 20% but less than 30%
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0052—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only carbides
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- 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
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
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- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Powder Metallurgy (AREA)
Abstract
A preparation method of a coating material for strengthening an ocean lifting platform bolt oil cylinder rod belongs to the field of surface coatings. The material mass percent is as follows: 20-25 wt% of Cr, 8-10 wt% of Mo, Nb: 3.15-4.15 wt%, Fe: 5-6 wt%, Al: 0.4-0.6 wt%, Ti: 0.4-0.6 wt%, C: 0.1-0.2 wt%, Mn: 0.3-0.6 wt%, Si: 0.5-0.6 wt%, Co: 1-2 wt%; nano-particle WC: 0.5-1.5 wt%, nano-particle TiC: 0.5-2 wt% of nano-particles Cr3C2: 0.5 to 1.5 wt%, and the balance being Ni. The laser power is 3-5KW, the diameter of the laser circular light spot is 0.5-1.5 mm, the lap joint rate is 80-90%, the powder feeding rate is 45-60g/min, and the laser light spot and the powder beam are convergedThe coke is 1-2mm above the surface of the matrix, the flow of protective gas argon is 40-50L/min, and the laser line scanning speed is 60-120 m/min.
Description
Technical Field
The invention relates to a preparation of a wear-resistant and corrosion-resistant coating on a metal surface and a high linear velocity laser cladding technology, belonging to the technical field of laser processing.
Background
The hydraulic cylinder occupies an indispensable position in the lifting process of the ocean platform, the ocean platform can have certain corrosion action on the surface of the cylinder rod due to long-term work in the ocean environment, when the corrosion action is overlarge, the phenomena of bulging and surface layer falling can occur on the surface of the cylinder rod, and the use and control of the lifting platform are seriously influenced.
The surface strengthening of the oil cylinder rod is generally a hard chromium plating, but the leakage phenomenon occurs because gaps and network microcracks are formed after the chromium plating layer is deposited. More importantly, in the electroplating process, a large amount of pollution and dangers exist to the environment, small defects can not be locally repaired, only can be integrally repaired, and resource waste is easily caused. At present, the use of electroplating to produce products has not been advocated globally.
As a novel surface strengthening technology, laser cladding has a very wide application prospect in improving the wear resistance and corrosion resistance of the material surface. Compared with the conventional coating, the laser cladding technology has more obvious advantages, the coating and the matrix can realize good metallurgical bonding, and the shape of a workpiece is not limited; the dilution of the substrate to the coating is controllable; causing less deformation of the workpiece and the like.
Disclosure of Invention
The invention aims to realize the strengthening and repairing of the surface of an oil cylinder rod of a hydraulic oil cylinder, provides a high-precision wear-resistant corrosion-resistant coating material and a preparation method of the coating, replaces an electroplating process, and greatly prolongs the service life of oil cylinder rod parts.
A preparation method of a coating material for strengthening an ocean lifting platform bolt oil cylinder rod is characterized in that the coating material comprises the following components in percentage by mass: 20-25 wt% of Cr, 8-10 wt% of Mo, Nb: 3.15-4.15 wt%, Fe: 5-6 wt%, Al: 0.4-0.6 wt%, Ti: 0.4-0.6 wt%, C: 0.1-0.2 wt%, Mn: 0.3-0.6 wt%, Si: 0.5-0.6 wt%, Co: 1-2 wt%; nano-particle WC: 0.5-1.5 wt%, nano-particle TiC: 0.5-2 wt% of nano-particles Cr3C2: 0.5 to 1.5 wt%, and the balance being Ni.
The parameters used for laser cladding are that the laser power is 3-5KW, the diameter of a laser circular light spot is 0.5-1.5 mm, the overlapping rate is 80-90%, the powder feeding rate is 45-60g/min, the laser beam spot and the powder beam are focused 1-2mm above the surface of the substrate, the protective gas is argon, the gas flow is 40-50L/min, and the laser line scanning speed is 60-120 m/min.
Compared with the traditional laser cladding, the high-speed cladding technology has more obvious advantages, the cladding speed is dozens of or even hundreds of times of the traditional cladding speed, the heat input is small, and the coating tissue is finer and more compact.
Drawings
FIG. 1 is a schematic view of high scan line speed laser cladding
FIG. 2 oil cylinder rod coating preparation diagram
FIG. 3 Overall OM micrograph of laser cladding coating in EXAMPLE 1
FIG. 4 SEM photograph of the whole laser cladding coating in example 1
FIG. 5 hardness profiles of coatings in examples 1, 2 and 3
FIG. 6 polarization curves of coating potentials in examples 1, 2 and 3
FIG. 7 shows the abrasion loss weight ratio of the coating layer to each substrate in examples 1, 2 and 3, respectively
Detailed Description
High-precision wear-resistant corrosion-resistant coatings with the thickness of 100-300 mu m are respectively prepared on the surfaces of Q690A steel, Q690D steel and EQ70 steel. And the particle size of the nano-particles is 30-60 nm.
Example 1
(1) The columnar metal Q690A steel in the selected area is used as a matrix, and the surface of the columnar metal Q690A steel is subjected to milling sand blasting treatment.
(2) The alloy powder comprises the following components in percentage by mass 20% of Cr, 8% of Mo, 8% of Nb: 3.15 wt%, Fe: 5 wt%, Al: 0.4 wt%, Ti: 0.4 wt%, C: 0.1 wt%, Mn: 0.5 wt%, Si: 0.5 wt%, Co: 1 wt%, nanoparticle WC: 1.5 wt%, nano-particle TiC: 1.5 wt%, nano-particle Cr3C2: 1.5 wt% and the balance Ni.
(3) The substrate is arranged on a high-speed turntable, a TruDiode 4064000W semiconductor fiber laser and a coaxial powder feeding laser cladding head are adopted, the diameter of a laser circular light spot is 0.5 mm, the laser power is 3KW, the lap joint rate is 85%, the powder feeding speed is 45g/min, the laser beam light spot and a powder beam are focused 1mm above the surface of the substrate, the protective gas is argon, the gas flow is 45L/min, the laser line scanning speed is 80m/min, and the thickness of the prepared coating is 100 mu m.
(4) Various performance tests were performed on the cladding coating obtained in this example
1. Electrochemical corrosion resistance test
The coating is subjected to corrosion resistance test by using a CHI660D electrochemical workstation, the experimental test environment is room temperature, and a three-electrode system is adopted: the auxiliary electrode was a platinum electrode, the reference electrode was a Saturated Calomel Electrode (SCE), and the electrolyte was a 3.5% NaCl solution, and the results are shown in fig. 6.
2. Microhardness
The hardness test adopts a Wilson HV microhardness tester, the test direction is the direction from the coating to the substrate, a multi-point test is carried out in the horizontal direction, the average value is taken, the load is 2000g, and the loading time is 10 s. The coating hardness can be seen to be uniformly distributed as a whole, and the coating hardness value reaches 637.5 Hv0.2.
3. Frictional wear performance test
And (3) carrying out a friction and wear test on the coating by using an MMG-10 type high-temperature friction and wear tester to detect the wear resistance of the coating. The MMG-10 testing machine can adjust the pressure of 10-10000N, the friction and wear test has no contact friction and wear of a lubricating surface under the condition of room temperature, the rotating speed is 100r/min, the loading force is 100N, the running time is 0.5h, the coating and the matrix are respectively tested, the wear weight loss of the coating is 11.5mg, and the wear weight loss of the matrix is 160.1mg (shown in figure 7), which indicates that the coating has excellent wear resistance.
Example 2
(1) And selecting columnar metal EQ70 steel as a matrix, and carrying out milling and sand blasting treatment on the surface of the columnar metal EQ70 steel.
(2) The alloy powder comprises the following components in percentage by mass 23% of Cr, 9% of Mo, Nb: 3.65 wt%, Fe: 5.5 wt%, Al: 0.5 wt%, Ti: 0.5 wt%, C: 0.15 wt%, Mn: 0.55 wt%, Si: 0.55 wt%, Co: 1.5 wt%, nanoparticlesWC: 1.7 wt%, nano-particle TiC: 1.7 wt%, nano-particle Cr3C2: 1.7 wt% and the balance Ni.
(3) The substrate is arranged on a high-speed turntable, a TruDiode 4064000W semiconductor fiber laser and a coaxial powder feeding laser cladding head are adopted, the diameter of a laser circular light spot is 1mm, the laser power is 4KW, the lap joint rate is 90%, the powder feeding speed is 55g/min, the laser beam light spot and a powder beam are focused 1.5mm above the surface of the substrate, the protective gas is argon, the gas flow is 45L/min, the laser line scanning speed is 80m/min, and the thickness of the prepared coating is 200 mu m.
(4) Various performance tests were performed on the cladding coating obtained in this example
1. Electrochemical corrosion resistance test
The coating is subjected to corrosion resistance test by using a CHI660D electrochemical workstation, the experimental test environment is room temperature, and a three-electrode system is adopted: the auxiliary electrode was a platinum electrode, the reference electrode was a Saturated Calomel Electrode (SCE), and the electrolyte was a 3.5% NaCl solution, and the results are shown in fig. 6.
3. Microhardness
The hardness test adopts a Wilson HV microhardness tester, the test direction is the direction from the coating to the substrate, a multi-point test is carried out in the horizontal direction, the average value is taken, the load is 2000g, and the loading time is 10 s. The coating hardness can be seen to be uniformly distributed as a whole, and the coating hardness value reaches 639.4 Hv0.2.
3. Frictional wear performance test
And (3) carrying out a friction and wear test on the coating by using an MMG-10 type high-temperature friction and wear tester to detect the wear resistance of the coating. The MMG-10 testing machine can adjust the pressure of 10-10000N, the friction and wear test has no contact friction and wear of a lubricating surface under the condition of room temperature, the rotating speed is 100r/min, the loading force is 100N, the running time is 0.5h, the coating and the matrix are respectively tested, the wear weight loss of the coating is 10.9mg, and the wear weight loss of the matrix is 174.6mg (shown in figure 7), which indicates that the coating has excellent wear resistance.
Example 3
(1) The columnar metal Q690D steel in the selected area is used as a matrix, and the surface of the columnar metal Q690D steel is subjected to milling sand blasting treatment.
(2) The alloy powder comprises the following components in percentage by mass 25% of Cr, 10% of Mo, Nb: 4.15 wt%, Fe: 6 wt%, Al: 0.6 wt%, Ti: 0.6 wt%, C: 0.2 wt%, Mn: 0.6 wt%, Si: 0.6 wt%, Co: 2 wt%, nanoparticle WC: 2 wt%, nano-particle TiC: 2 wt% of nano-particle Cr3C2:2 wt% and Ni for the rest.
(3) The method comprises the steps of mounting a substrate on a high-speed turntable, adopting a TruDiode 4064000W semiconductor fiber laser and a coaxial powder feeding laser cladding head, wherein the diameter of a laser circular light spot is 1.5mm, the laser power is 5KW, the lap joint rate is 90%, the powder feeding speed is 60g/min, the laser beam light spot and a powder beam are focused 2mm above the surface of the substrate, the protective gas is argon, the gas flow is 50L/min, the laser line scanning speed is 80m/min, and the thickness of the prepared coating is 300 mu m.
(4) Various performance tests were performed on the cladding coating obtained in this example
1. Electrochemical corrosion resistance test
The coating is subjected to corrosion resistance test by using a CHI660D electrochemical workstation, the experimental test environment is room temperature, and a three-electrode system is adopted: the auxiliary electrode was a platinum electrode, the reference electrode was a Saturated Calomel Electrode (SCE), and the electrolyte was a 3.5% NaCl solution, and the results are shown in fig. 6.
4. Microhardness
The hardness test adopts a Wilson HV microhardness tester, the test direction is the direction from the coating to the substrate, a multi-point test is carried out in the horizontal direction, the average value is taken, the load is 2000g, and the loading time is 10 s. The coating hardness can be seen to be uniformly distributed as a whole, and the coating hardness value reaches 638.4 Hv0.2.
3. Frictional wear performance test
And (3) carrying out a friction and wear test on the coating by using an MMG-10 type high-temperature friction and wear tester to detect the wear resistance of the coating. The MMG-10 testing machine can adjust the pressure of 10-10000N, the friction and wear test has no contact friction and wear of a lubricating surface under the condition of room temperature, the rotating speed is 100r/min, the loading force is 100N, the running time is 0.5h, the coating and the matrix are respectively tested, the wear weight loss of the coating is 10.5mg, and the wear weight loss of the matrix is 194.3mg (shown in figure 7), which indicates that the coating has excellent wear resistance.
Claims (1)
1. A preparation method of a coating material for strengthening an ocean lifting platform bolt oil cylinder rod is characterized in that the coating material comprises the following components in percentage by mass: 20-25 wt% of Cr, 8-10 wt% of Mo, Nb: 3.15-4.15 wt%, Fe: 5-6 wt%, Al: 0.4-0.6 wt%, Ti: 0.4-0.6 wt%, C: 0.1-0.2 wt%, Mn: 0.3-0.6 wt%, Si: 0.5-0.6 wt%, Co: 1-2 wt%; nano-particle WC: 0.5-1.5 wt%, nano-particle TiC: 0.5-2 wt% of nano-particles Cr3C2: 0.5-1.5 wt% of Ni and the balance of Ni; and the particle size of the nano-particles is 30-60 nm;
the preparation steps of the coating are as follows:
(1) obtaining coating alloy powder according to the proportion, wherein the granularity of the alloy powder is 20-50 mu m, mixing the alloy powder with the nano particles, and putting the mixture into a drying oven for later use;
(2) turning and sand blasting the surface of the failed oil cylinder rod, and cleaning;
(3) preparing a coating in a region to be repaired or strengthened by adopting a laser cladding mode, wherein the diameter of a laser circular light spot is 0.5-1.5 mm, the laser power is 3-5KW, the lap joint rate is 80-90%, the powder feeding rate is 45-60g/min, the laser beam spot and the powder beam are focused 1-2mm above the surface of a substrate, the protective gas is argon, the gas flow is 40-50L/min, the laser line scanning speed is 60-120m/min, and the coating thickness is 100-300 mu m.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114250462A (en) * | 2021-12-04 | 2022-03-29 | 中国长江三峡集团有限公司 | Preparation method of alloy cladding layer for prolonging wear-resistant and corrosion-resistant life of steel structural member in ocean total immersion area |
| CN114875397A (en) * | 2022-02-24 | 2022-08-09 | 国营芜湖机械厂 | Preparation method of surface coating of piston rod of hydraulic oil tank of airplane |
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| CN114250462A (en) * | 2021-12-04 | 2022-03-29 | 中国长江三峡集团有限公司 | Preparation method of alloy cladding layer for prolonging wear-resistant and corrosion-resistant life of steel structural member in ocean total immersion area |
| CN114875397A (en) * | 2022-02-24 | 2022-08-09 | 国营芜湖机械厂 | Preparation method of surface coating of piston rod of hydraulic oil tank of airplane |
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