CN109898077A - A kind of process of surface treatment of coal mine machinery low-alloy structural steel - Google Patents
A kind of process of surface treatment of coal mine machinery low-alloy structural steel Download PDFInfo
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- CN109898077A CN109898077A CN201910096009.XA CN201910096009A CN109898077A CN 109898077 A CN109898077 A CN 109898077A CN 201910096009 A CN201910096009 A CN 201910096009A CN 109898077 A CN109898077 A CN 109898077A
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Abstract
The present invention discloses a kind of process of surface treatment of coal mine machinery low-alloy structural steel, comprising the following steps: S1: pretreatment: low-alloy structural steel being immersed derusting protective liquid, double-frequency ultrasound handles 10-15min, removes surface grease and rust staining, and generate phosphating coat；The derusting protective liquid includes following quality than component: phosphatase 24-8%, citric acid 2-3%, potassium molybdate 1-2%, thiocarbamide 1-1.5%, amino acid surfactant 3-5%, lauryl sodium sulfate 0.5-1%, water supply surplus；S2: electrostatic spraying；S3: rf magnetron sputtering plates PTFE film；S4: corona treatment: in 150-200 DEG C, the environment of 600Pa, with NH3、CH4、SiH4Plasma gas phase deposition is carried out for reaction gas.Treatment process of the present invention effectively improves its steel workpiece surface hardness, wearability, self-lubrication, corrosion resistance, can effectively inhibit the stress corrosion of workpiece under larger stress condition, and then improve coal mine machinery equipment endurance life.
Description
Technical field
The invention belongs to coal mine machinery technical fields, further relate to structure technical field of steel surface treatment, and in particular to a kind of
The process of surface treatment of coal mine machinery low-alloy structural steel.
Background technique
Coal mine machinery is used exclusively for the machinery of coal mining, is mainly used for digging, supporting, transport, washing of coal mine etc.
Production process, China have in the developing history of coal in China chemical industry as the first big producer of coal, applying for coal mine machinery
There is landmark significance, improves the production efficiency and quality of coal.
Low-alloy structural steel refers to alloying component total amount in 5% structural alloy steel below, since itself has high yield
The performance characteristics such as the limit, higher bearing capacity, excellent low-temperature impact toughness, pass needed for becoming coal mine machinery equipment manufacture
Key material.Since low-alloy structural steel main body is ferritic structure, toughness is preferable, but hardness and surface abrasion resistance low strength,
Poor corrosion resistance, it is necessary to its wearability and corrosion resistance be improved by special surface treatment method, reduce coal mine machinery equipment
Mechanical wear degree is caused when running, and then extends the service life of coal mine machinery equipment.In recent years, about steel surface processing
The research of aspect and report emerge one after another, and such as application No. is the patent of CN200810035058.4, open surface treatment liquids, surface
Processing method and surface treated tin plate；Such as application No. is the patent of CN201480065135.4, open zinc-aluminium-magnesium
The surface treatment method of alloy plating steel plate；Such as application No. is the patents of CN201811-324642.1, disclose a kind of tint
Uniform stainless steel continuous plating process, but currently, there has been no specifically for the low-alloy structural steel for being applied to coal mine machinery
Surface treatment method.
In view of the above, present invention combination phosphorating treatment, Electrostatic Spray Technology, radiofrequency magnetron sputtering technology, plasma
Body surface face is seeped N, C, Si technology and is surface-treated to coal mine machinery with low-alloy structural steel, and it is wear-resisting to improve its steel workpiece surface
Property, self-lubrication, corrosion resistance, and then extend coal mine machinery equipment service life.
Summary of the invention
In view of the deficiencies of the prior art, the purpose of the present invention is to provide a kind of coal mine machinery low-alloy structural steel
Process of surface treatment.
Technical solution of the present invention is summarized as follows:
A kind of process of surface treatment of coal mine machinery low-alloy structural steel, comprising the following steps:
S1: pretreatment: immersing derusting protective liquid for low-alloy structural steel, and double-frequency ultrasound handles 10-15min, removes surface
Grease and rust staining, and chemically reacted in one layer of phosphating coat of steel surface in-situ preparation, after distilled water flushing 3 times, 120-130 DEG C
Flash baking；
The derusting protective liquid includes following quality than component: phosphatase 24-8%, citric acid 2-3%, potassium molybdate 1-2%, sulphur
Urea 1-1.5%, amino acid surfactant 3-5%, lauryl sodium sulfate 0.5-1%, water supply surplus；
S2: electrostatic spraying: using Electrostatic Spray Technology by fluorocarbon modified coating uniform metallization in low-alloy structural steel surface,
Control spray voltage is 40-55KV, and electrostatic induced current is 10-12 μ A, velocity pressure 0.4-0.5MPa, coating layer thickness 0.2-
0.3mm, and in 120-160 DEG C, heat preservation solidification 15min；
S3: rf magnetron sputtering plated film: by vacuum chamber to 1 × 10-4-5×10-4Pa, then it is passed through argon gas, with poly-
Tetrafluoroethene is as target, and after pre-sputtering 3min, using low-alloy structural steel as substrate, the deposition rate of control PTFE film is 10
μm/min, sputter 10-15min；
S4: corona treatment: in 150-200 DEG C, the environment of 600Pa, with NH3、CH4、SiH4It is right for reaction gas
Low-alloy structural steel surface carries out corona treatment after plated film, and be vapor-deposited nitrogen, silicon, carbon, and processing voltage is 500-
600V。
Preferably, the frequency of the double-frequency ultrasound processing is respectively 20-25KHz, 60-70KHz.
Preferably, the fluorocarbon modified coating includes following quality than component: nano silicon oxide 5-10%, nano silicon carbide
Boron 3-5%, nano zircite 0.5-2%, titanium esters acid coupling agent 0.1-0.5%, surplus are fluorocarbon resin.
Preferably, the NH3、CH4、SiH4Volume ratio be 4:2:3.
Beneficial effects of the present invention:
(1) present invention combine phosphorating treatment, Electrostatic Spray Technology, radiofrequency magnetron sputtering technology, plasma surface seep N,
C, Si technology is surface-treated low-alloy structural steel, improves its steel workpiece surface hardness, wearability, self-lubrication, resistance to
Corrosivity can effectively inhibit the stress corrosion of workpiece under larger stress condition, and then it is strong to improve coal mine machinery equipment endurance
Degree, prolongs the service life.
(2) present invention completes low-alloy structural steel surface cleaning and phosphorus using derusting protective liquid and double-frequency ultrasound processing technique
Change processing, phosphoric acid and citric acid manufacture acid solution environment, surface rusty stain are dissolved, and cooperate with potassium molybdate, with Fe2+、Fe3+Chela
Slightly solubility molysite is synthesized, steel surface is attached to, amino acid surfactant is made for emulsifying, removing steel surface greasy dirt, thiocarbamide
For organic slow-release agent, slow down Fe2+、Fe3+Dissolution rate, inhibit acid medium to corroding inside steel part.
(3) present invention utilizes Electrostatic Spray Technology by fluorocarbon modified coating spraying plating in steel piece surface, and utilizes magnetron sputtering
Technology further sputters PTFE film (polytetrafluoroethylene (PTFE)) in steel piece surface, improves the hardness, wear-resisting of low-alloy structural steel surface
Property, self-lubrication, corrosion resistance, impact resistance, anti-flexibility and soil resistance etc., the low surface of fluorocarbon resin and polytetrafluoroethylene (PTFE)
Can characteristic assign steel part non-stick, antifouling self-cleaning property, self-lubrication, form super hydrophobic surface, and improve the anticorrosive of steel part
Property, so improve coal mine machinery fatigue durability and working efficiency, nano silicon oxide, nano boron carbide, nano zircite to
Improve steel object surface hardness and impact resistant strength.
(4) present invention is with NH3、CH4、SiH4For reaction gas, corona treatment, gas are carried out to steel part after magnetron sputtering
Mutually deposition nitrogen, silicon, carbon further decreases steel piece surface energy, and then improves self-lubrication, reduces coal mine machinery equipment running
Shi Zaocheng mechanical wear degree, and improve steel part resistance to soiling and corrosion resistance.
Specific embodiment
The present invention will be further described in detail below with reference to the embodiments, to enable those skilled in the art referring to specification
Text can be implemented accordingly.
Embodiment 1
A kind of process of surface treatment of coal mine machinery low-alloy structural steel, comprising the following steps:
S1: pretreatment: 18Nb low-alloy structural steel is immersed into derusting protective liquid, double-frequency ultrasound handles 10min, and double frequency is super
The frequency of sonication is respectively 20KHz, 60KHz, removes surface grease and rust staining, and chemically reacted in steel surface in-situ preparation
One layer of phosphating coat, after distilled water flushing 3 times, 120 DEG C of flash bakings；
The derusting protective liquid includes following quality than component: phosphatase 24 %, citric acid 2%, potassium molybdate 1%, thiocarbamide 1%,
Amino acid surfactant 3%, lauryl sodium sulfate 0.5%, water 88.5%；
S2: electrostatic spraying: using Electrostatic Spray Technology by fluorocarbon modified coating uniform metallization in low-alloy structural steel surface,
Control spray voltage is 40KV, and electrostatic induced current is 10 μ A, velocity pressure 0.4MPa, coating layer thickness 0.2mm, and in 120 DEG C,
Heat preservation solidification 15min；
The fluorocarbon modified coating includes following quality than component: nano silicon oxide 5%, nano boron carbide 3%, nano oxygen
Changing zirconium 0.5%, titanium esters acid coupling agent 0.1%, surplus is fluorocarbon resin；
S3: rf magnetron sputtering plated film: by vacuum chamber to 1 × 10-4Pa, then it is passed through argon gas, with polytetrafluoroethylene (PTFE)
As target, after pre-sputtering 3min, using low-alloy structural steel as substrate, the deposition rate of control PTFE film is 10 μm/min,
Sputter 10min；
S4: corona treatment: being the NH of 4:2:3 with volume ratio in 150 DEG C, the environment of 600Pa3、CH4、SiH4For
Reaction gas carries out corona treatment to low-alloy structural steel surface after plated film, and be vapor-deposited nitrogen, silicon, carbon, processing electricity
Pressure is 500V.
Compared to not surface treated 18Nb low-alloy structural steel, surface hardness improves 17.6%, surface roughness
53.4% is reduced, service life extends 84d, skin-friction coefficient 0.13.
Embodiment 2
A kind of process of surface treatment of coal mine machinery low-alloy structural steel, comprising the following steps:
S1: pretreatment: immersing derusting protective liquid for 10MnPNbRE low-alloy structural steel, and double-frequency ultrasound handles 12min,
The frequency of double-frequency ultrasound processing is respectively 23KHz, 65KHz, removes surface grease and rust staining, and is chemically reacted in steel surface original
Position generates one layer of phosphating coat, after distilled water flushing 3 times, 125 DEG C of flash bakings；
The derusting protective liquid includes following quality than component: phosphoric acid 6%, citric acid 2.5%, potassium molybdate 1.5%, thiocarbamide
1.25%, amino acid surfactant 4%, lauryl sodium sulfate 0.75%, water 84%；
S2: electrostatic spraying: using Electrostatic Spray Technology by fluorocarbon modified coating uniform metallization in low-alloy structural steel surface,
Control spray voltage is 48KV, and electrostatic induced current is 11 μ A, velocity pressure 0.45MPa, coating layer thickness 0.25mm, and in 140
DEG C, heat preservation solidification 15min；
The fluorocarbon modified coating includes following quality than component: nano silicon oxide 7.5%, nano boron carbide 4%, nanometer
Zirconium oxide 1.2%, titanium esters acid coupling agent 0.3%, fluorocarbon resin 87%；
S3: rf magnetron sputtering plated film: by vacuum chamber to 3 × 10-4Pa, then it is passed through argon gas, with polytetrafluoroethylene (PTFE)
As target, after pre-sputtering 3min, using low-alloy structural steel as substrate, the deposition rate of control PTFE film is 10 μm/min,
Sputter 13min；
S4: corona treatment: being the NH of 4:2:3 with volume ratio in 180 DEG C, the environment of 600Pa3、CH4、SiH4For
Reaction gas carries out corona treatment to low-alloy structural steel surface after plated film, and be vapor-deposited nitrogen, silicon, carbon, processing electricity
Pressure is 550V.
Compared to not surface treated 10MnPNbRE low-alloy structural steel, surface hardness improves 22.8%, and surface is thick
Rugosity reduces by 51.6%, and service life extends 95d, skin-friction coefficient 0.14.
Embodiment 3
A kind of process of surface treatment of coal mine machinery low-alloy structural steel, comprising the following steps:
S1: pretreatment: 14MnViRE low-alloy structural steel is immersed into derusting protective liquid, double-frequency ultrasound handles 15min, double
The frequency of frequency ultrasonic treatment is respectively 25KHz, 70KHz, removes surface grease and rust staining, and is chemically reacted in steel surface original position
One layer of phosphating coat is generated, after distilled water flushing 3 times, 130 DEG C of flash bakings；
The derusting protective liquid includes following quality than component: phosphoric acid 8%, citric acid 3%, potassium molybdate 2%, thiocarbamide
1.5%, amino acid surfactant 5%, lauryl sodium sulfate 1%, water；
S2: electrostatic spraying: using Electrostatic Spray Technology by fluorocarbon modified coating uniform metallization in low-alloy structural steel surface,
Control spray voltage is 55KV, and electrostatic induced current is 12 μ A, velocity pressure 0.5MPa, coating layer thickness 0.3mm, and in 160 DEG C,
Heat preservation solidification 15min；
The fluorocarbon modified coating includes following quality than component: nano silicon oxide 10%, nano boron carbide 5%, nanometer
Zirconium oxide 2%, titanium esters acid coupling agent 0.5%, fluorocarbon resin 82.5%；
S3: rf magnetron sputtering plated film: by vacuum chamber to 5 × 10-4Pa, then it is passed through argon gas, with polytetrafluoroethylene (PTFE)
As target, after pre-sputtering 3min, using low-alloy structural steel as substrate, the deposition rate of control PTFE film is 10 μm/min,
Sputter 15min；
S4: corona treatment: being the NH of 4:2:3 with volume ratio in 200 DEG C, the environment of 600Pa3、CH4、SiH4For
Reaction gas carries out corona treatment to low-alloy structural steel surface after plated film, and be vapor-deposited nitrogen, silicon, carbon, processing electricity
Pressure is 600V.
Compared to not surface treated 14MnViRE low-alloy structural steel, surface hardness improves 25.1%, and surface is thick
Rugosity reduces by 52.2%, and service life extends 120d, skin-friction coefficient 0.13.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details.
Claims (4)
1. a kind of process of surface treatment of coal mine machinery low-alloy structural steel, which comprises the following steps:
S1: pretreatment: immersing derusting protective liquid for low-alloy structural steel, and double-frequency ultrasound handles 10-15min, removes surface grease
And rust staining, and chemically reacted in one layer of phosphating coat of steel surface in-situ preparation, after distilled water flushing 3 times, 120-130 DEG C is quickly
Drying；
The derusting protective liquid includes following quality than component: phosphatase 24-8%, citric acid 2-3%, potassium molybdate 1-2%, thiocarbamide 1-
1.5%, amino acid surfactant 3-5%, lauryl sodium sulfate 0.5-1%, water supply surplus；
S2: electrostatic spraying: using Electrostatic Spray Technology by fluorocarbon modified coating uniform metallization in low-alloy structural steel surface, control
Spray voltage is 40-55KV, and electrostatic induced current is 10-12 μ A, velocity pressure 0.4-0.5MPa, coating layer thickness 0.2-0.3mm,
And in 120-160 DEG C, heat preservation solidification 15min；
S3: rf magnetron sputtering plated film: by vacuum chamber to 1 × 10-4-5×10-4Pa, then it is passed through argon gas, with polytetrafluoroethyl-ne
Alkene is as target, after pre-sputtering 3min, using low-alloy structural steel as substrate, and the deposition rate of control PTFE film is 10 μm/
Min sputters 10-15min；
S4: corona treatment: in 150-200 DEG C, the environment of 600Pa, with NH3、CH4、SiH4For reaction gas, to plated film
Low-alloy structural steel surface carries out corona treatment afterwards, and be vapor-deposited nitrogen, silicon, carbon, and processing voltage is 500-600V.
2. a kind of process of surface treatment of coal mine machinery low-alloy structural steel according to claim 1, which is characterized in that institute
The frequency for stating double-frequency ultrasound processing is respectively 20-25KHz, 60-70KHz.
3. a kind of process of surface treatment of coal mine machinery low-alloy structural steel according to claim 1, which is characterized in that institute
Stating fluorocarbon modified coating includes following quality than component: nano silicon oxide 5-10%, nano boron carbide 3-5%, nano zircite
0.5-2%, titanium esters acid coupling agent 0.1-0.5%, surplus are fluorocarbon resin.
4. a kind of process of surface treatment of coal mine machinery low-alloy structural steel according to claim 1, which is characterized in that institute
State NH3、CH4、SiH4Volume ratio be 4:2:3.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114769093A (en) * | 2022-05-05 | 2022-07-22 | 江苏龙山管件有限公司 | Preparation process of wear-resistant pressure-resistant bent pipe |
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Application publication date: 20190618 |