CN105170973B - A kind of wear resistant corrosion resistant coating material and the method applied to steel pipe - Google Patents
A kind of wear resistant corrosion resistant coating material and the method applied to steel pipe Download PDFInfo
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- CN105170973B CN105170973B CN201510728450.7A CN201510728450A CN105170973B CN 105170973 B CN105170973 B CN 105170973B CN 201510728450 A CN201510728450 A CN 201510728450A CN 105170973 B CN105170973 B CN 105170973B
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Abstract
A kind of method the invention discloses wear resistant corrosion resistant coating material and applied to steel pipe.Wear resistant corrosion resistant coating material of the present invention forms：30 50wt% Ni Cr B Si powder, 40 65wt% tungsten carbon or ferrotungsten or tungsten powder, 5 20wt% C powder.The present invention adds absolute alcohol stirring, well mixed obtained binding agent with epoxy resin；Wear resistant corrosion resistant coating material is mixed and made into mixed powder for alloy, mixed powder for alloy is added in binding agent, stirring, well mixed slimy alloy mixed slurry is made；Alloy mixed slurry is evenly applied on steel pipe inner wall, is placed in being heated to 80 120 DEG C of 3 6h of drying in drying box；After cooling to steel pipe with the furnace room temperature, it is put into high vacuum sintering furnace after 200 400 DEG C of 2 4h of insulation, 1,200 1280 DEG C of 2 4h of insulation, completes the coating of abrasion-proof corrosion-proof erosion resisting coating.The present invention solves the problems, such as that existing corrosion-resistant composite coating is not ideal under extreme conditions for the anticorrosion effect of steel pipe.
Description
Technical field
The invention belongs to metal material sintering technology field, and in particular to a kind of wear resistant corrosion resistant coating material and be applied to
The method of steel pipe.
Background technology
Traditional wear resistant corrosion resistant composite coating is not ideal under extreme conditions for the anticorrosion effect of steel pipe, and
Due to the formulation properties of coating, it is applied to the method for steel pipe often with plasma spray, flame-spraying and laser cladding the methods of system
Standby, there is the shortcomings of coating binding force is not high enough, voidage is bigger than normal or production cost is higher in these preparation methods, particularly one
A little special occasions operation difficulties are big, and production percent defective is high, such as inner-walls of duct, engine inner wall.
The content of the invention
An object of the present invention is to solve anticorrosion effect of the existing corrosion-resistant composite coating for steel pipe extreme
Under the conditions of it is not ideal the problem of, there is provided a kind of wear resistant corrosion resistant coating material.
The wear resistant corrosion resistant coating material, consisting of：30-50wt% Ni-Cr-B-Si powder, 40-65wt% tungsten
Carbon or ferrotungsten or tungsten powder, 5-20wt% C powder.
Specifically, above-mentioned Ni-Cr-B-Si powder is the atomization Ni-Cr-B-Si powder of business；The C powder is carbon powder
End.
The second object of the present invention is to provide the method that above-mentioned wear resistant corrosion resistant coating material is applied to steel pipe, and it includes
Following steps：
(1) absolute alcohol stirring, well mixed, obtained binding agent are added with epoxy resin；
(2) Ni-Cr-B-Si powder, tungsten carbon or ferrotungsten or tungsten powder, C powder are mixed and made into mixed powder for alloy, will closed
Golden mixed-powder is added in binding agent obtained by step (1), stirring, is well mixed, slimy alloy mixed slurry is made；
(3) alloy mixed slurry is evenly applied on steel pipe inner wall, be placed in being heated in drying box 80-120 DEG C it is dry
Dry 3-6h；
(4) after cooling to steel pipe with the furnace room temperature, it is put into high vacuum sintering furnace after 200-400 DEG C of insulation 2-4h, 1200-
1280 DEG C of insulation 2-4h, complete the coating of abrasion-proof corrosion-proof erosion resisting coating.
Specifically, in step (1) described binding agent, the epoxy resin content per a binding agent is 0.06-0.15g, nothing
Water-alcohol addition is 2-4ml.
Specifically, in step (2) described mixed powder for alloy, the content of each component is：30-50wt% Ni-Cr-B-Si
Powder, 40-65wt% tungsten carbon or ferrotungsten or tungsten powder, 5-20wt% C powder.
Specifically, in step (2), the mixed powder for alloy weight added in every a binding agent is 10-20g.
The present invention can obtain even tissue, performance is homogeneous, resistance to using cold spraying and the method for vacuum-sintering complex technique
The high W-Ni-Cr-B-Si-C composite coatings of mill property, corrosion resistance, and it is applied to inner-walls of duct, a kind of abrasion-proof corrosion-proof has been made
Erosion pipe.W-Ni-Cr-B-Si-C sintered pipes of the present invention are made in vacuum sintering furnace, in the absence of the table in welding, spraying process
The problems such as face aoxidizes, polluted, coating performance is uneven, it is effectively improved corrosion resistance, the anti-wear performance of cladding layer.The present invention
Due to being sintered article, it is easy to accomplish automated production, expand application scenario.
The present invention has following significant difference compared with prior art：
(1) compared with arc surfacing, anticorrosive wear-resistant pipe made from vacuum-sintering is in the absence of the oxidation in welding process, folder
Miscellaneous, the problems such as performance is uneven, avoid the multiple tracks deposition process in weld deposit process, and sintering process smoke dust, pollution, phase
It is more more environmentally friendly than welding procedure.
(2) compared with thermal spraying, anticorrosive wear-resistant pipe made from vacuum-sintering, the bond strength of coating and matrix is more
Height, distribution of particles is more uniform, 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.
Embodiment
With reference to specific embodiment, the present invention is described in further detail.
The formula of wear resistant corrosion resistant coating material of the embodiment of the present invention is：
30-50wt% Ni-Cr-B-Si powder, 40-65wt% tungsten carbon dust or ferrotungsten powder or tungsten powder, 5-
20wt% C powder.Tungsten carbon dust or ferrotungsten powder or tungsten powder are referred to as W powder by the present invention.
Wherein, Ni-Cr-B-Si powder be business atomization Ni-Cr-B-Si powder, such as WF372.C powder source is preferably
Carbon black.
Wear resistant corrosion resistant coating material of the present invention be applied to steel pipe method be：
Step 1：Absolute alcohol stirring, well mixed, binding agent needed for obtained experiment are added with epoxy resin；Each of which
Part binding agent epoxy resin content is preferably 0.06-0.15g, and absolute alcohol addition is 2-4ml.
Step 2：Ni-Cr-B-Si+ tungsten carbon or ferrotungsten or tungsten powder+carbon black mixed-powder are made, in mixed-powder：(30-50)
Wt%Ni-Cr-B-Si+ (40-65) wt%W+ (5-20) wt%C.Mixed-powder is mixed into binding agent and stirs, is well mixed,
Muddy alloy mixed slurry is made；Wherein, the mixed-powder weight added per a binding agent is 10-20g.
Step 3：Alloy mixed slurry is evenly applied on steel pipe inner wall, the preferred Q235 steel pipes of steel pipe, is placed in drying
80-120 DEG C is heated in case, dries 3-6h；
Step 4：After cooling to steel pipe with the furnace room temperature, it is put into high vacuum sintering furnace, after 200-400 DEG C of insulation 2-4h,
1200-1280 DEG C of insulation 2-4h again, completes the coating of abrasion-proof corrosion-proof erosion resisting coating.
Here is specific embodiment：
Embodiment 1：
Q235 length of steel pipe is 30mm, a diameter of 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, stirring, it is well mixed,
Muddy alloy mixed slurry is made, after be evenly applied on Q235 steel pipe inner walls, alloy mixed powder coating thickness is 3mm, do
Dry time 6h, 80 DEG C of drying temperature, is put into high vacuum sintering furnace, after 200 DEG C of insulation 4h, then 1200 DEG C of insulation 4h.Measure burning
Tie article coatings thickness 0.85mm.Electro-chemical test is carried out with CS350 electrochemical workstations, corrosive liquid is that 3.5wt%NaCl is molten
Liquid, it is scanned with 1mV/s speed, corroded area 1cm2, electric potential scanning section is -0.1~1V.Measure corrosion current
Density I0：6.34E-6A/cm2, corrosion potential E0：- 0.391V.Hardness is tested with HR-150 Rockwell apparatuses, using multidigit multiple spot
Method of testing, 7 points of average value is taken as test result.The average hardness of composite coating is HRC62.7.It is wet using MLS-23 types
Sand rubber type friction wear testing machine carries out abrasion test.Counterweight is 2.5kg, and abrasive material is the quartz sand of 40~60 mesh, in sand
Slurry ratio is under conditions of 1.5kg quartz sands match somebody with somebody 1kg water, after sample pre-grinding 1000r, to regrind 1000r, measuring wear weight loss is
0.0132g。
Embodiment 2：
Q235 length of steel pipe is 30mm, a diameter of 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, stirring, it is well mixed,
Muddy alloy mixed slurry is made, after be evenly applied on Q235 steel pipe inner walls, alloy mixed powder coating thickness is 3.5mm,
Drying time 3h, 120 DEG C of drying temperature, is put into high vacuum sintering furnace, after 400 DEG C of insulation 2h, then 1280 DEG C of insulation 2h.Measure
Sintered article coating layer thickness 1.06mm.Measure as described in Example 1, corrosion electric current density I0：6.51E-6A/cm2, corrosion electricity
Position E0：- 0.378V, the average hardness of composite coating is HRC64.5, wear weight loss 0.0121g.
Embodiment 3：
Q235 length of steel pipe is 50mm, a diameter of 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.Stirring, it is well mixed,
Muddy alloy mixed powder is made, after be evenly applied on Q235 steel pipe inner walls, alloy mixed powder coating thickness is 3.5mm, do
Dry time 4h, 100 DEG C of drying temperature, is put into high vacuum sintering furnace, after 300 DEG C of insulation 3h, then 1250 DEG C of insulation 3h.Measure burning
Tie article coatings thickness 1.03mm.Measure as described in Example 1, corrosion electric current density I0：6.44E-6A/cm2, corrosion potential
E0：- 0.369V, the average hardness of composite coating is HRC66.3, wear weight loss 0.0113g.
Described above is only the better embodiment to the present invention, not makees any formal limit to the present invention
System, any simple modification that every technical spirit according to the present invention is made to embodiment of above, equivalent variations and modification,
Belong in the range of technical solution of the present invention.
Claims (3)
1. a kind of wear resistant corrosion resistant coating material is applied to the method for steel pipe, including wear resistant corrosion resistant coating material, abrasion-proof corrosion-proof
Erosion resisting coating raw material forms：30-50wt% Ni-Cr-B-Si powder, 40-65wt% tungsten carbon or ferrotungsten or tungsten powder, 5-
20wt% C powder；The Ni-Cr-B-Si powder is the atomization Ni-Cr-B-Si powder of business；The C powder is carbon powder
End；
It is characterized in that comprise the following steps：
（1）Absolute alcohol stirring, well mixed, obtained binding agent are added with epoxy resin；
（2）Ni-Cr-B-Si powder, tungsten carbon or ferrotungsten or tungsten powder, C powder are mixed and made into mixed powder for alloy, alloy is mixed
Close powder and add step（1）In gained binding agent, stirring, it is well mixed, slimy alloy mixed slurry is made；
（3）Alloy mixed slurry is evenly applied on steel pipe inner wall, is placed in being heated to 80-120 DEG C of dry 3- in drying box
6h；
（4）After cooling to steel pipe with the furnace room temperature, it is put into high vacuum sintering furnace after 200-400 DEG C of insulation 2-4h, 1200-1280
DEG C insulation 2-4h, complete abrasion-proof corrosion-proof erosion resisting coating coating.
2. wear resistant corrosion resistant coating material is applied to the method for steel pipe according to claim 1, it is characterised in that：Step（1）
In the binding agent, the epoxy resin content per a binding agent is 0.06-0.15g, and absolute alcohol addition is 2-4ml.
3. wear resistant corrosion resistant coating material is applied to the method for steel pipe according to claim 1, it is characterised in that：Step（2）
In, the mixed powder for alloy weight added in every a binding agent is 10-20g.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109352108A (en) * | 2018-11-14 | 2019-02-19 | 吉林大学 | Repair the tungsten base powder alloy casting mould coating and technique of production aluminium alloy engine cylinder cap |
Families Citing this family (1)
| 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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