CN105170973A - Wearing-resistant and corrosion-resistant coating raw material and method of applying the wearing-resistant and corrosion-resistant coating raw material on steel pipe - Google Patents
Wearing-resistant and corrosion-resistant coating raw material and method of applying the wearing-resistant and corrosion-resistant coating raw material on steel pipe Download PDFInfo
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- CN105170973A CN105170973A CN201510728450.7A CN201510728450A CN105170973A CN 105170973 A CN105170973 A CN 105170973A CN 201510728450 A CN201510728450 A CN 201510728450A CN 105170973 A CN105170973 A CN 105170973A
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Abstract
The invention discloses a wearing-resistant and corrosion-resistant coating raw material and a method of applying the wearing-resistant and corrosion-resistant coating raw material on a steel pipe. The wearing-resistant and corrosion-resistant coating raw material comprises the components of 30-50wt% of Ni-Cr-B-Si powder, 40-65% of tungsten carbon or tungsten iron or tungsten powder, and 5-20wt% of C powder. The method of applying the wearing-resistant and corrosion-resistant coating raw material on the steel pipe comprises the steps of adding epoxy resin into absolute alcohol, mixing to uniform for preparing an adhesive; mixing the components of the wearing-resistant and corrosion-resistant coating raw material for preparing an alloy mixed powder, adding the alloy mixed powder into the adhesive, and mixing to uniform for preparing a slurry-shaped alloy mixed slurry; uniformly coating the alloy mixed slurry onto the inner wall of the steel pipe, placing the steel pipe into a drying box, heating for keeping the temperature in the drying box to 80-120 DEG C and drying for 3-6 hours; and performing furnace cooling on the steel pipe until the temperature reduces to a room temperature, placing the steel pipe into a high-vacuum sintering furnace and keeping the temperature at 200-400 DEG C for 2-4 hours, and then keeping the temperature at 1200-1280 DEG C for 2-4 hours, thereby finishing plating of the wearing-resistance and corrosion-resistant coating. The wearing-resistant and corrosion-resistant coating raw material and the method of applying the same on the steel pipe settle a problem of non-ideal corrosion resistance of an existing corrosion-resistant coating to the steel pipe in an extreme condition.
Description
Technical field
The invention belongs to metal material sintering technology field, be specifically related to a kind of wear resistant corrosion resistant coating material and be applied to the method for steel pipe.
Background technology
Traditional wear resistant corrosion resistant composite coating is under extreme conditions not ideal for the anticorrosion effect of steel pipe, and due to the formulation properties of coating, its method being applied to steel pipe is often with method preparations such as plasma spray, flame-spraying and laser claddings, these preparation methods exist that coating binding force is not high enough, voidage is bigger than normal or the shortcoming such as production cost is higher, particularly large in some special occasions operation easier, production percent defective is high, as inner-walls of duct, engine inner wall etc.
Summary of the invention
An object of the present invention is to solve existing corrosion-resistant composite coating for the anticorrosion effect under extreme conditions less-than-ideal problem of steel pipe, provides a kind of wear resistant corrosion resistant coating material.
This wear resistant corrosion resistant coating material, it consists of: the C powder of the Ni-Cr-B-Si powder of 30-50wt%, the tungsten carbon of 40-65wt% or ferrotungsten or tungsten powder, 5-20wt%.
Concrete, above-mentioned Ni-Cr-B-Si powder is the atomization Ni-Cr-B-Si powder of business; Described C powder is hydrocarbon black powder.
Two of object of the present invention is to provide above-mentioned wear resistant corrosion resistant coating material to be applied to the method for steel pipe, and it comprises the steps:
(1) add absolute alcohol with epoxy resin to stir, mix, obtained binding agent;
(2) Ni-Cr-B-Si powder, tungsten carbon or ferrotungsten or tungsten powder, C powder are mixed and made into mixed powder for alloy, mixed powder for alloy is added in step (1) gained binding agent, stir, mix, make slimy alloy mixed slurry;
(3) alloy mixed slurry is evenly coated on steel pipe inner wall, and is placed in drying box and is heated to 80-120 DEG C of dry 3-6h;
(4), after cooling to steel pipe with the furnace room temperature, after putting into high vacuum sintering furnace 200-400 DEG C of insulation 2-4h, 1200-1280 DEG C of insulation 2-4h, completes the coating of abrasion-proof corrosion-proof erosion resisting coating.
Concrete, in step (1) described binding agent, the epoxy resin content of every a binding agent is 0.06-0.15g, and absolute alcohol addition is 2-4ml.
Concrete, in step (2) described mixed powder for alloy, the content of each component is: the C powder of the Ni-Cr-B-Si powder of 30-50wt%, the tungsten carbon of 40-65wt% or ferrotungsten or tungsten powder, 5-20wt%.
Concrete, in step (2), the mixed powder for alloy weight added in every a binding agent is 10-20g.
The present invention adopts the method for cold spraying and vacuum-sintering complex technique, and can obtain even tissue, performance is homogeneous, the W-Ni-Cr-B-Si-C composite coating that wearability, corrosion resistance are all high, and is applied to inner-walls of duct, has obtained a kind of Wear resistance corrosion resistance pipe.W-Ni-Cr-B-Si-C sintered pipes of the present invention is obtained in vacuum sintering furnace, there is not the problems such as the surface oxidation in welding, spraying process, pollution, coating performance be uneven, effectively improves the corrosion resistance of cladding layer, anti-wear performance.The present invention, owing to being sintered article, easily is automated production, expands application scenario.
The present invention compared with prior art has following obviously difference:
(1) compared with arc surfacing, the problem such as the anticorrosive wear-resistant pipe that vacuum-sintering obtains does not exist oxidation in welding process, is mingled with, performance is uneven, avoid the multiple tracks deposition operation in weld deposit process, and sintering process smoke dust, pollution, compare welding procedure more environmental protection.
(2) compared with thermal spraying, the anticorrosive wear-resistant pipe that vacuum-sintering is obtained, the bond strength of coating and matrix is higher, and distribution of particles is more even, and the porosity of material is low, and the utilization rate of material is higher.
(3) compared with laser cladding method, equipment requirement is relatively low, and production efficiency is higher, and use occasion is more extensive.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further detail.
The formula of embodiment of the present invention wear resistant corrosion resistant coating material is:
The C powder of the Ni-Cr-B-Si powder of 30-50wt%, the tungsten carbon dust of 40-65wt% or ferrotungsten powder or tungsten powder, 5-20wt%.The present invention by tungsten carbon dust or ferrotungsten powder or tungsten powder referred to as W powder.
Wherein, Ni-Cr-B-Si powder is the atomization Ni-Cr-B-Si powder of business, as WF372.C powder source is preferably carbon black.
The method that wear resistant corrosion resistant coating material of the present invention is applied to steel pipe is:
Step 1: add absolute alcohol with epoxy resin and stir, mix, the required binding agent of obtained test; Wherein every a binding agent epoxy resin content is preferably 0.06-0.15g, and absolute alcohol addition is 2-4ml.
Step 2: make Ni-Cr-B-Si+ tungsten carbon or ferrotungsten or tungsten powder+carbon black mixed-powder, in mixed-powder: (30-50) wt%Ni-Cr-B-Si+ (40-65) wt%W+ (5-20) wt%C.Mixed-powder is mixed into stirring in binding agent, mixes, make muddy alloy mixed slurry; Wherein, the mixed-powder weight that every a binding agent adds is 10-20g.
Step 3: alloy mixed slurry is evenly coated on steel pipe inner wall, the preferred Q235 steel pipe of steel pipe, and be placed in drying box and be heated to 80-120 DEG C, dry 3-6h;
Step 4: after cooling to steel pipe with the furnace room temperature, put into high vacuum sintering furnace, after 200-400 DEG C of insulation 2-4h, then 1200-1280 DEG C of insulation 2-4h, complete the coating of abrasion-proof corrosion-proof erosion resisting coating.
Here is specific embodiment:
Embodiment 1:
Q235 steel pipe length is 30mm, and diameter is 30mm, thick 2mm.Alloy powder 10g, wherein 5wt%C, 23wt%Cr, 1.5wt%B, l.5wt%Si, 4wt%Ni, 65wt%W, epoxy resin 0.06g and absolute alcohol 2ml, stir, mix, make muddy alloy mixed slurry, be evenly coated on Q235 steel pipe inner wall afterwards, alloy mixed powder coating thickness is 3mm, drying time 6h, baking temperature 80 DEG C, puts into high vacuum sintering furnace, after 200 DEG C of insulation 4h, then 1200 DEG C of insulation 4h.Record sintered article coating layer thickness 0.85mm.Carry out electro-chemical test with CS350 electrochemical workstation, corrosive liquid is 3.5wt%NaCl solution, scans with the speed of 1mV/s, and corroded area is 1cm
2, electric potential scanning interval is-0.1 ~ 1V.Record corrosion electric current density I
0: 6.34E
-6a/cm
2, corrosion potential E
0:-0.391V.By HR-150 Rockwell apparatus tested for hardness, adopt multidigit multi-point test method, get the mean value of 7 as test result.The average hardness of composite coating is HRC62.7.MLS-23 type damp sand rubber type friction wear testing machine is adopted to carry out abrasion test.Counterweight is 2.5kg, and abrasive material is 40 ~ 60 object quartz sands, and be under 1.5kg quartz sand joins the condition of 1kg water in mortar ratio, after sample pre-grinding 1000r, regrind 1000r, and recording wear weight loss is 0.0132g.
Embodiment 2:
Q235 steel pipe length is 30mm, and diameter is 50mm, thick 2mm.Alloy powder 15g, wherein 15wt%C, 23wt%Cr, 1.5wt%B, l.5wt%Si, 14wt%Ni, 45wt%W, epoxy resin 0.1g and absolute alcohol 3ml, stir, mix, make muddy alloy mixed slurry, be evenly coated on Q235 steel pipe inner wall afterwards, alloy mixed powder coating thickness is 3.5mm, drying time 3h, baking temperature 120 DEG C, puts into high vacuum sintering furnace, after 400 DEG C of insulation 2h, then 1280 DEG C of insulation 2h.Record sintered article coating layer thickness 1.06mm.Record by the method for embodiment 1, corrosion electric current density I
0: 6.51E
-6a/cm
2, corrosion potential E
0:-0.378V, the average hardness of composite coating is HRC64.5, and wear weight loss is 0.0121g.
Embodiment 3:
Q235 steel pipe length is 50mm, and diameter is 30mm, thick 2mm.Alloy powder 20g, wherein 10wt%C, 23wt%Cr, 1.5wt%B, l.5wt%Si, 24wt%Ni, 40wt%W, epoxy resin 0.15g and absolute alcohol 4ml.Stir, mix, make muddy alloy mixed powder, be evenly coated on Q235 steel pipe inner wall afterwards, alloy mixed powder coating thickness is 3.5mm, drying time 4h, baking temperature 100 DEG C, put into high vacuum sintering furnace, after 300 DEG C of insulation 3h, then 1250 DEG C of insulation 3h.Record sintered article coating layer thickness 1.03mm.Record by the method for embodiment 1, corrosion electric current density I
0: 6.44E
-6a/cm
2, corrosion potential E
0:-0.369V, the average hardness of composite coating is HRC66.3, and wear weight loss is 0.0113g.
The above is only to better embodiment of the present invention, not any pro forma restriction is done to the present invention, every any simple modification done above embodiment according to technical spirit of the present invention, equivalent variations and modification, all belong in the scope of technical solution of the present invention.
Claims (6)
1. a wear resistant corrosion resistant coating material, is characterized in that consisting of: the C powder of the Ni-Cr-B-Si powder of 30-50wt%, the tungsten carbon of 40-65wt% or ferrotungsten or tungsten powder, 5-20wt%.
2. wear resistant corrosion resistant coating material according to claim 1, is characterized in that: described Ni-Cr-B-Si powder is the atomization Ni-Cr-B-Si powder of business; Described C powder is hydrocarbon black powder.
3. wear resistant corrosion resistant coating material is applied to a method for steel pipe as claimed in claim 1, it is characterized in that comprising the steps:
(1) add absolute alcohol with epoxy resin to stir, mix, obtained binding agent;
(2) Ni-Cr-B-Si powder, tungsten carbon or ferrotungsten or tungsten powder, C powder are mixed and made into mixed powder for alloy, mixed powder for alloy is added in step (1) gained binding agent, stir, mix, make slimy alloy mixed slurry;
(3) alloy mixed slurry is evenly coated on steel pipe inner wall, and is placed in drying box and is heated to 80-120 DEG C of dry 3-6h;
(4), after cooling to steel pipe with the furnace room temperature, after putting into high vacuum sintering furnace 200-400 DEG C of insulation 2-4h, 1200-1280 DEG C of insulation 2-4h, completes the coating of abrasion-proof corrosion-proof erosion resisting coating.
4. wear resistant corrosion resistant coating material is applied to the method for steel pipe according to claim 3, it is characterized in that: in step (1) described binding agent, and the epoxy resin content of every a binding agent is 0.06-0.15g, and absolute alcohol addition is 2-4ml.
5. wear resistant corrosion resistant coating material is applied to the method for steel pipe according to claim 3, it is characterized in that: in step (2) described mixed powder for alloy, the content of each component is: the C powder of the Ni-Cr-B-Si powder of 30-50wt%, the tungsten carbon of 40-65wt% or ferrotungsten or tungsten powder, 5-20wt%.
6. wear resistant corrosion resistant coating material is applied to the method for steel pipe according to claim 3, it is characterized in that: in step (2), and the mixed powder for alloy weight added in every a binding agent is 10-20g.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110396690A (en) * | 2019-08-08 | 2019-11-01 | 湘潭大学 | A kind of nickel-aluminum bronze surface laser cladding amorphous composite coating and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109352108B (en) * | 2018-11-14 | 2020-11-03 | 吉林大学 | Tungsten-based powder alloy casting mold coating for repairing engine cylinder cover and process |
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