CN111500963A - Method for improving surface roughness of steel pipe - Google Patents

Method for improving surface roughness of steel pipe Download PDF

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Publication number
CN111500963A
CN111500963A CN202010361258.XA CN202010361258A CN111500963A CN 111500963 A CN111500963 A CN 111500963A CN 202010361258 A CN202010361258 A CN 202010361258A CN 111500963 A CN111500963 A CN 111500963A
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CN
China
Prior art keywords
steel plate
steel pipe
surface roughness
improving
steel
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010361258.XA
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Chinese (zh)
Inventor
曹献龙
王焕新
王世杰
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Suzhou Xinwu Steel Structure Engineering Co ltd
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Suzhou Xinwu Steel Structure Engineering Co ltd
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Publication date
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Priority to CN202010361258.XA priority Critical patent/CN111500963A/en
Publication of CN111500963A publication Critical patent/CN111500963A/en
Pending legal-status Critical Current

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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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • 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
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/08—Iron or steel
    • C23G1/085—Iron or steel solutions containing HNO3
    • 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
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/08—Iron or steel
    • C23G1/088—Iron or steel solutions containing organic acids

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

The invention relates to a method for improving the surface roughness of a steel pipe, which is characterized by comprising the following steps: cutting the steel plate according to the size requirement, and cleaning the surface of the steel plate; putting the steel plate into acid liquor at least 40 ℃, pressurizing the steel plate and performing ultrasonic treatment on the steel plate; and bending the steel plate into a steel pipe. The invention can make acid liquid better modify the surface of the steel plate by matching the ultrasonic wave and the pressurizing operation, thereby improving the surface roughness of the steel plate and further improving the combination degree of the zinc-sprayed layer and the steel plate base material.

Description

Method for improving surface roughness of steel pipe
Technical Field
The invention relates to the field of steel pipe poles, in particular to a method for improving the surface roughness of a steel pipe.
Background
At present, in the anticorrosion process of a steel pipe rod for power transmission, a hot zinc spraying anticorrosion process is a very important one, the process needs to obtain a good effect, and the combination degree of a zinc spraying layer and steel is very critical.
Disclosure of Invention
The invention overcomes the defects of the prior art and provides a method for improving the surface roughness of a steel pipe.
In order to achieve the purpose, the invention adopts the technical scheme that: the method for improving the surface roughness of the steel pipe is characterized by comprising the following steps: cutting the steel plate according to the size requirement, and cleaning the surface of the steel plate; putting the steel plate into acid liquor at least 40 ℃, pressurizing the steel plate and performing ultrasonic treatment on the steel plate; and bending the steel plate into a steel pipe.
Preferably, the acid solution is nitric acid, the pressure for pressurizing the nitric acid solution is 2-5MPa, and the ultrasonic frequency is 40 kHz.
As a more preferred embodiment, the concentration of the nitric acid is 25 to 40 wt%.
As a more preferred embodiment, the temperature of the nitric acid is 45-60 ℃.
As a more preferable scheme, the time for putting the steel plate into the nitric acid for treatment is 2-5 min.
As a preferable scheme, the surface cleaning treatment of the steel plate specifically comprises: soaking the steel plate in degreasing solution for 30-60min, and washing with water; then, the steel plate is soaked in hydrochloric acid water solution for 5-10min and then is washed by water.
As a more preferable scheme, the solvent of the degreasing fluid is water, and the solvent comprises 1-2wt% of 200-mesh guar gum, 3-5wt% of citric acid, 2-5wt% of montmorillonite, 10-15wt% of sodium dodecyl sulfate and 5-8wt% of fatty glyceride.
As a more preferable mode, the concentration of the aqueous hydrochloric acid solution is 10 to 15 wt%.
The invention has the beneficial technical effects that: a method for improving the surface roughness of a steel pipe is provided.
(1) The invention can make acid liquid better modify the surface of the steel plate by matching the ultrasonic wave and the pressurizing operation, thereby improving the surface roughness of the steel plate and further improving the combination degree of the zinc-sprayed layer and the steel plate base material.
(2) The method adopts the mode of firstly carrying out surface treatment on the steel plate and then bending the welding seam into the steel pipe, and compared with the mode of carrying out surface treatment, especially inner surface treatment on the steel pipe with the bent welding seam, the method is more convenient to operate and has better uniformity of surface treatment.
Detailed Description
The invention is further described with reference to specific examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1
A method for improving the surface roughness of a steel pipe comprises the following steps:
(1) and cutting the steel plate according to the size requirement.
(2) Soaking the steel plate in degreasing solution for 60min, and then washing with deionized water; then placing the steel plate in 15wt% hydrochloric acid water solution for soaking for 5min, and then cleaning with deionized water; then drying at 90 ℃; wherein, the solvent of the degreasing fluid is water, which contains 1wt% of 200-mesh guar gum, 5wt% of citric acid, 5wt% of montmorillonite, 15wt% of sodium dodecyl sulfate and 5wt% of fatty glyceride; the method mainly comprises the step of cleaning the surface of the steel plate to remove impurities on the surface of the steel plate.
(3) Taking a 40wt% nitric acid aqueous solution at 45 ℃, pressurizing the nitric acid aqueous solution and performing ultrasonic treatment on the nitric acid aqueous solution; wherein the pressurizing pressure is 5MPa, and the ultrasonic frequency is 40 kHz; cooling the steel plate treated in the step (1) to below 60 ℃, and then putting the steel plate into the nitric acid solution for treatment for 2 min; in this step, the acid liquid impacts the surface of the steel sheet under the action of the ultrasonic waves under the conditions of heating and pressurizing, so that the roughness of the surface of the steel sheet can be improved.
(4) Cleaning and drying the steel plate treated in the step (3), and then performing conventional bending and welding to form a steel pipe; compared with the method for carrying out surface treatment, especially inner surface treatment on the steel pipe with the bent welding seam, the method is more convenient to operate and has better uniformity of surface treatment.
Example 2
A method for improving the surface roughness of a steel pipe comprises the following steps:
(1) and cutting the steel plate according to the size requirement.
(2) Soaking the steel plate in degreasing solution for 30min, and then washing with deionized water; then, placing the steel plate in 10wt% hydrochloric acid water solution for soaking for 10min, and then cleaning with deionized water; then drying at 90 ℃; wherein, the solvent of the degreasing fluid is water, which contains 2wt% of 200-mesh guar gum, 3wt% of citric acid, 2wt% of montmorillonite, 10wt% of sodium dodecyl sulfate and 8wt% of fatty glyceride; the method mainly comprises the step of cleaning the surface of the steel plate to remove impurities on the surface of the steel plate.
(3) Taking a 25wt% nitric acid aqueous solution at 60 ℃, pressurizing and ultrasonically treating the nitric acid aqueous solution; wherein the pressurizing pressure is 2MPa, and the ultrasonic frequency is 40 kHz; and (2) cooling the steel plate treated in the step (1) to below 60 ℃, and then putting the steel plate into the nitric acid solution for treatment for 5 min.
(4) And (4) cleaning and drying the steel plate treated in the step (3), and then performing conventional bending and welding to form a steel pipe.
Comparative example 1
The present comparative example differs from example 1 in that: the treatment was not carried out by ultrasound.
The method specifically comprises the following steps:
(1) and cutting the steel plate according to the size requirement.
(2) Soaking the steel plate in degreasing solution for 60min, and then washing with deionized water; then placing the steel plate in 15wt% hydrochloric acid water solution for soaking for 5min, and then cleaning with deionized water; then drying at 90 ℃; wherein, the solvent of the degreasing fluid is water, and the degreasing fluid contains 1wt% of 200-mesh guar gum, 5wt% of citric acid, 5wt% of montmorillonite, 15wt% of sodium dodecyl sulfate and 5wt% of fatty glyceride.
(3) Taking 40wt% nitric acid aqueous solution at 45 ℃, and pressurizing the nitric acid aqueous solution, wherein the pressurizing pressure is 5 MPa; and (2) cooling the steel plate treated in the step (1) to below 60 ℃, putting the steel plate into the nitric acid solution, and stirring for 2 min.
(4) And (4) cleaning and drying the steel plate treated in the step (3), and then performing conventional bending and welding to form a steel pipe.
Comparative example 2
The present comparative example differs from example 1 in that: no pressure treatment is used.
The method specifically comprises the following steps:
(1) and cutting the steel plate according to the size requirement.
(2) Soaking the steel plate in degreasing solution for 60min, and then washing with deionized water; then placing the steel plate in 15wt% hydrochloric acid water solution for soaking for 5min, and then cleaning with deionized water; then drying at 90 ℃; wherein, the solvent of the degreasing fluid is water, and the degreasing fluid contains 1wt% of 200-mesh guar gum, 5wt% of citric acid, 5wt% of montmorillonite, 15wt% of sodium dodecyl sulfate and 5wt% of fatty glyceride.
(3) Taking a 40wt% nitric acid aqueous solution at 45 ℃, and adding ultrasonic waves with the frequency of 40kHz to the nitric acid aqueous solution; and (2) cooling the steel plate treated in the step (1) to below 60 ℃, and then putting the steel plate into the nitric acid solution for treatment for 2 min.
(4) And (4) cleaning and drying the steel plate treated in the step (3), and then performing conventional bending and welding to form a steel pipe.
And (3) testing surface roughness:
the steel pipes prepared in examples 1-2 and comparative examples 1-2 were tested by a stylus type roughness meter, and the surface roughness of each sample was as follows:
r of the Steel pipe of example 1z71.5 μm; r of Steel pipe of example 2z70.6 μm; r of Steel pipe of comparative example 1z59.5 μm; r of the Steel pipe of example 1zIt was 58.1 μm.
The detection result can find that: the surface roughness of the steel pipes of the examples 1-2 and the comparative examples 1-2 reach the technical requirement of 40-80 μm; in comparison, the steel pipes of examples 1 and 2 had higher surface roughness, and the bonding of the zinc sprayed layer to the substrate was more facilitated. The experimental results show that: the acid liquor can better modify the surface of the steel plate under the matching of ultrasonic waves and pressurization operation, and the surface roughness of the steel plate is improved.
In light of the foregoing description of the preferred embodiment of the present invention, it is to be understood that various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (8)

1. The method for improving the surface roughness of the steel pipe is characterized by comprising the following steps: cutting the steel plate according to the size requirement, and cleaning the surface of the steel plate; putting the steel plate into acid liquor at least 40 ℃, pressurizing the steel plate and performing ultrasonic treatment on the steel plate; and bending the steel plate into a steel pipe.
2. The method for improving the surface roughness of a steel pipe according to claim 1, wherein: the acid solution is nitric acid, the pressure for pressurizing the nitric acid solution is 2-5MPa, and the ultrasonic frequency is 40 kHz.
3. The method for improving the surface roughness of a steel pipe according to claim 2, wherein: the concentration of the nitric acid is 25-40 wt%.
4. The method for improving the surface roughness of a steel pipe according to claim 3, wherein: the temperature of the nitric acid is 45-60 ℃.
5. The method for improving the surface roughness of a steel pipe according to claim 4, wherein: the steel plate is put into the nitric acid for treatment for 2-5 min.
6. The method for improving the surface roughness of a steel pipe according to any one of claims 1 to 5, wherein: the surface cleaning treatment of the steel plate comprises the following specific steps: soaking the steel plate in degreasing solution for 30-60min, and washing with water; then, the steel plate is soaked in hydrochloric acid water solution for 5-10min and then is washed by water.
7. The method for improving the surface roughness of a steel pipe according to claim 6, wherein: the solvent of the degreasing fluid is water, and the degreasing fluid contains 1-2wt% of 200-mesh guar gum, 3-5wt% of citric acid, 2-5wt% of montmorillonite, 10-15wt% of sodium dodecyl sulfate and 5-8wt% of fatty glyceride.
8. The method for improving the surface roughness of a steel pipe according to claim 6, wherein: the concentration of the hydrochloric acid aqueous solution is 10-15 wt%.
CN202010361258.XA 2020-04-30 2020-04-30 Method for improving surface roughness of steel pipe Pending CN111500963A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114774935A (en) * 2022-04-11 2022-07-22 上海建冶科技股份有限公司 Steel member surface roughness control method for laser rust removal

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5518552A (en) * 1978-07-26 1980-02-08 Kawasaki Steel Corp Pickling method for cr type stainless steel
CN102639752A (en) * 2009-12-03 2012-08-15 新日本制铁株式会社 Method for pickling steel plates and pickling device
CN104294292A (en) * 2014-09-16 2015-01-21 湖州至诚精密金属科技有限公司 Pickling comprehensive treatment process of stainless steel material
CN106835158A (en) * 2016-12-26 2017-06-13 安徽宝恒新材料科技有限公司 A kind of surface acidation treatment method of steel
CN107413883A (en) * 2017-09-25 2017-12-01 宝鸡市永盛泰钛业有限公司 A kind of processing method of titanium alloy thin-walled tube stock

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5518552A (en) * 1978-07-26 1980-02-08 Kawasaki Steel Corp Pickling method for cr type stainless steel
CN102639752A (en) * 2009-12-03 2012-08-15 新日本制铁株式会社 Method for pickling steel plates and pickling device
CN104294292A (en) * 2014-09-16 2015-01-21 湖州至诚精密金属科技有限公司 Pickling comprehensive treatment process of stainless steel material
CN106835158A (en) * 2016-12-26 2017-06-13 安徽宝恒新材料科技有限公司 A kind of surface acidation treatment method of steel
CN107413883A (en) * 2017-09-25 2017-12-01 宝鸡市永盛泰钛业有限公司 A kind of processing method of titanium alloy thin-walled tube stock

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114774935A (en) * 2022-04-11 2022-07-22 上海建冶科技股份有限公司 Steel member surface roughness control method for laser rust removal

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Address after: 215000 Jinhua 745, Jinjiaba, Wujiang District, Suzhou City, Jiangsu Province

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