CN113088978A - Stainless steel surface treatment method - Google Patents
Stainless steel surface treatment method Download PDFInfo
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- CN113088978A CN113088978A CN202110371744.4A CN202110371744A CN113088978A CN 113088978 A CN113088978 A CN 113088978A CN 202110371744 A CN202110371744 A CN 202110371744A CN 113088978 A CN113088978 A CN 113088978A
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 128
- 239000010935 stainless steel Substances 0.000 title claims abstract description 128
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000004381 surface treatment Methods 0.000 title claims description 15
- 238000005121 nitriding Methods 0.000 claims abstract description 46
- 150000003839 salts Chemical class 0.000 claims abstract description 37
- 238000007709 nanocrystallization Methods 0.000 claims abstract description 28
- 238000005422 blasting Methods 0.000 claims abstract description 24
- 239000002105 nanoparticle Substances 0.000 claims abstract description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 22
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 14
- 238000004140 cleaning Methods 0.000 claims description 9
- 229910001039 duplex stainless steel Inorganic materials 0.000 claims description 9
- 238000005480 shot peening Methods 0.000 claims description 6
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 6
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 6
- 239000003921 oil Substances 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 238000000861 blow drying Methods 0.000 claims description 3
- 238000005238 degreasing Methods 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 abstract description 16
- 230000007797 corrosion Effects 0.000 abstract description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 5
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 5
- 238000001556 precipitation Methods 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 4
- 230000032798 delamination Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 239000011159 matrix material Substances 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 abstract description 4
- 239000013078 crystal Substances 0.000 abstract description 3
- 230000008595 infiltration Effects 0.000 abstract description 3
- 238000001764 infiltration Methods 0.000 abstract description 3
- 239000002086 nanomaterial Substances 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 9
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 6
- 229910001566 austenite Inorganic materials 0.000 description 4
- 125000004433 nitrogen atom Chemical group N* 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 239000011780 sodium chloride Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 238000004506 ultrasonic cleaning Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 230000018199 S phase Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- -1 construction Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- OMBRFUXPXNIUCZ-UHFFFAOYSA-N dioxidonitrogen(1+) Chemical class O=[N+]=O OMBRFUXPXNIUCZ-UHFFFAOYSA-N 0.000 description 1
- 238000000840 electrochemical analysis Methods 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002052 molecular layer Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F17/00—Multi-step processes for surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by subclass C21D or C22F or class C25
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
- C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
-
- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/02—Pretreatment of the material to be coated
-
- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/40—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions
- C23C8/42—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions only one element being applied
- C23C8/48—Nitriding
- C23C8/50—Nitriding of ferrous surfaces
Abstract
The invention discloses a method for processing the surface of stainless steel, which comprises the following steps of 1, carrying out shot blasting processing on the surface of a stainless steel sample to enable the surface of the stainless steel sample to be nano-sized; and 2, performing salt bath nitriding treatment on the stainless steel sample subjected to the nanocrystallization treatment. According to the invention, the surface of the stainless steel is subjected to nano treatment before salt bath nitriding, so that a large amount of dislocation and defects are formed on the surface of the stainless steel, the sizes of the obtained crystal grains are all in a nano level, no obvious interface exists between a nano structure and a matrix structure, and no delamination or separation occurs. The surface nanocrystallization improves the activity of the surface of the stainless steel material, and increases nitrogen channels, so that the nitriding temperature can be reduced, the precipitation of Cr element can be reduced, the corrosion resistance is improved compared with the traditional process, and the surface hardness of the stainless steel can be improved. The nitriding temperature is lower, so that Cr element is prevented from being precipitated; after the salt bath infiltration treatment, a nitrided layer is formed on the surface of the stainless steel, so that the stainless steel has good surface performance.
Description
Technical Field
The invention belongs to the technical field of heat treatment, and particularly relates to a stainless steel surface treatment method.
Background
The use of stainless steel requires that it has both certain corrosion resistance and higher surface hardness to have better resistance to fatigue fracture, stress corrosion and frictional wear. At present, the main method for improving the corrosion resistance and the friction resistance of stainless steel is to carry out salt bath nitriding treatment on the surface of the stainless steel. After nitriding treatment, the surface of the stainless steel can obtain high surface hardness. However, the conventional salt bath nitriding method is carried out at a temperature higher than the main temperature (T & gt 550 ℃), so that a great amount of CrN is precipitated on the surface of a device, and although the hardness is improved, the corrosion resistance is greatly reduced. If the nitriding temperature is lowered in order to improve the corrosion resistance, the activity of N atoms is insufficient, so that the active N atoms cannot enter the surface of the stainless steel, and the problem of a large decrease in hardness occurs.
Therefore, in order to reduce the precipitation of Cr element, improve the corrosion resistance of conventional stainless steel, and increase the surface hardness of stainless steel, it is necessary to develop a new method for surface treatment of stainless steel.
Disclosure of Invention
The invention aims to solve the problems and provide a method for treating the surface of stainless steel. According to the method, the surface of the stainless steel is subjected to nanocrystallization treatment before salt bath nitriding, so that a large number of dislocations and defects are formed on the surface of the stainless steel, the sizes of obtained grains are all in a nanometer level, no obvious interface exists between a nanocrystallization tissue and a matrix tissue, and delamination or separation cannot occur. The surface nanocrystallization improves the activity of the surface of the stainless steel material, and the nitrogen channel is added, so the nitriding temperature can be reduced, the precipitation of Cr element is reduced, the corrosion resistance is improved compared with the traditional process, and the surface hardness of the stainless steel can be obviously improved.
The purpose of the invention can be achieved by adopting the following technical scheme:
a method for surface treatment of stainless steel, comprising the steps of:
and 2, performing salt bath nitriding treatment on the stainless steel sample subjected to the nanocrystallization treatment.
As a preferable mode, the shot peening in the step 1 includes the steps of:
sequentially polishing, degreasing, cleaning and blow-drying the surface of the stainless steel sample;
placing the processed stainless steel sample on shot blasting equipment for shot blasting treatment to enable the surface of the stainless steel sample to be nano-sized;
after shot blasting treatment, the stainless steel sample is sequentially degreased, cleaned and dried.
As a preferable scheme, the surface of a stainless steel sample is sequentially polished by silicon carbide abrasive paper, and then oil stain is removed by using acetone, ultrasonically cleaned in an ethanol solution and dried.
After shot blasting treatment, cleaning the stainless steel sample with acetone to remove oil stains, and then ultrasonically cleaning the stainless steel sample in an ethanol solution and drying the stainless steel sample.
As a preferred scheme, the nitriding temperature of the salt bath nitriding of the step 2 is 462 ℃ to 468 ℃.
As a preferred scheme, the silicon carbide abrasive paper is 180-800 meshes.
Preferably, the shot blasting device is an ultrasonic shot blasting device.
As a preferable scheme, the test sample is dried after being ultrasonically cleaned in an ethanol solution for 5 minutes.
Preferably, the stainless steel sample is 2205 duplex stainless steel
The implementation of the invention has the following beneficial effects:
1. according to the invention, the surface of the stainless steel is subjected to nano treatment before salt bath nitriding, so that a large amount of dislocation and defects are formed on the surface of the stainless steel, the sizes of the obtained crystal grains are all in a nano level, no obvious interface exists between a nano structure and a matrix structure, and no delamination or separation occurs. The surface nanocrystallization improves the activity of the surface of the stainless steel material, and the nitrogen channel is increased, so that the nitriding temperature can be reduced, the precipitation of Cr element can be reduced, the corrosion resistance is improved compared with the traditional process, and the surface hardness of the stainless steel can be obviously improved.
2. The nitriding temperature is lower, so that Cr element is prevented from being precipitated; after the salt bath infiltration treatment, a nitrided layer is formed on the surface of the stainless steel, so that the stainless steel has good surface performance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a microstructure of a stainless steel work surface that has not been surface nanocrystallized but has been salt bath nitrided only;
FIG. 2 is a microstructure view of a stainless steel working surface of the method at a stainless steel surface of the present invention;
FIG. 3 is a potentiodynamic polarization plot in 3.5 wt% NaCl for stainless steel and surface nanocrystallized and salt bath nitrided stainless steel at high temperatures for the method of the present invention at the stainless steel surface.
FIG. 4 is a graph of the method of the present invention at the surface of stainless steel and the hardness of stainless steel without any treatment, stainless steel after only surface nanocrystallization treatment, stainless steel after only salt bath nitriding treatment, stainless steel after surface nanocrystallization treatment and salt bath nitriding treatment at high temperature.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b):
referring to fig. 2, the present embodiment relates to a method of surface treatment of stainless steel, comprising the steps of:
sequentially polishing the surfaces of stainless steel samples by adopting 180-mesh, 400-mesh, 600-mesh and 800-mesh silicon carbide abrasive papers, degreasing by using acetone, ultrasonically cleaning in an ethanol solution, and drying;
placing the processed stainless steel sample on ultrasonic shot blasting equipment for shot blasting treatment to enable the surface of the stainless steel sample to be nano-sized;
after shot blasting treatment, the stainless steel sample is cleaned by acetone to remove oil stains, and then the stainless steel sample is ultrasonically cleaned in an ethanol solution for 5 minutes and then dried.
And 2, performing salt bath nitriding treatment on the stainless steel sample subjected to the nanocrystallization treatment. The nitriding temperature of the salt bath nitriding is 462 ℃ to 468 ℃.
The following will specifically describe the surface treatment of 2205 duplex stainless steel sample, which comprises the following steps:
(1) polishing the surface of the stainless steel to remove an oxide layer, wherein the polishing adopts 180-mesh, 400-mesh, 600-mesh and 800-mesh silicon carbide abrasive paper to sequentially polish;
(2) carrying out ultrasonic cleaning on the polished stainless steel to remove surface impurities, and then using ethanol to remove water and blow dry;
(3) adopting a high-energy shot blasting method, and using stainless steel shots with the diameter of 0.5mm to perform shot blasting treatment on a 2205 duplex stainless steel sample for 10min under the pressure of 0.6 MPa;
(4) cleaning the stainless steel subjected to shot blasting by using acetone to remove oil stains, ultrasonically cleaning the stainless steel in an ethanol solution for 5min, and then drying the stainless steel to obtain a compact nano layer on the surface of the stainless steel;
2. the method comprises the following steps of performing nitriding treatment on the surface of stainless steel by adopting a salt bath nitriding method:
(1) performing line cutting on the stainless steel subjected to nanocrystallization in the step 1, processing a sample with the size of 10 multiplied by 5mm, and reserving a working surface with the size of 10 multiplied by 10 mm;
(2) carrying out ultrasonic cleaning on the polished stainless steel to remove surface impurities, and then carrying out dehydration and blow-drying on the stainless steel by using ethanol;
(3) heating and preserving the nitronium salt at 680 ℃ for 12 hours, and then cooling to 465 ℃;
(4) immersing the sample prepared in the step (2) into the nitridized salt obtained in the step (3), and nitriding for 4 hours;
(5) after nitriding is finished, the stainless steel sample is cleaned by deionized water and then dried by a blower for electrochemical test, hardness test and erosion corrosion test.
FIG. 1 is a microstructure of a stainless steel working surface without shot peening treatment according to the present example, and FIG. 2 is a microstructure of a stainless steel working surface after surface nanocrystallization treatment and salt bath nitriding treatment according to the present example. As can be seen from fig. 1 and 2, after the surface of the stainless steel is nitrided, a layer of white bright layer is formed on the surface and is a supersaturated solid solution of nitrogen in austenite, and the contrast shows that the stainless steel grains subjected to the surface nanocrystallization treatment are refined and a more compact and uniform white bright layer is obtained.
The following experimental comparisons of hardness for various stainless steel surfaces in the treatment method and the method of the invention were made:
The hardness test was performed on stainless steel without any treatment, stainless steel subjected only to surface nanocrystallization treatment, stainless steel subjected only to salt bath nitriding treatment, stainless steel subjected to surface nanocrystallization treatment and salt bath nitriding treatment at high temperature, and the treatment method of the present invention, as shown in fig. 4.
As can be seen from fig. 4, the hardness of the stainless steel after only the surface nanocrystallization treatment is improved compared to the original sample, but the hardness difference between the stainless steel after the surface nanocrystallization treatment and the salt bath nitriding treatment and the conventional stainless steel surface treatment method (the stainless steel after only the salt bath nitriding treatment) is greater than the hardness of the stainless steel after the original sample and the surface nanocrystallization treatment, which indicates that the shot peening treatment can promote the penetration of N atoms.
The stainless steel subjected to surface nanocrystallization treatment and salt bath nitriding treatment (465 ℃ C. for 4 hours) and the stainless steel obtained by the method 2 were subjected to electrochemical corrosion behavior test in a NaCl solution with a mass concentration of 3.5 wt% by using an electrochemical workstation of CHI700E series provided by CH Instruments Ins company, and the experimental results are shown in FIG. 3.
FIG. 3 is a potentiodynamic polarization curve diagram of stainless steel subjected to surface nanocrystallization treatment and salt bath nitriding treatment (465 ℃ for 4 hours) and stainless steel of method 2 in 3.5 wt% NaCl.
As can be seen from FIG. 3, the polarization curves of the stainless steel after the surface nanocrystallization treatment and the salt bath nitriding treatment (465 ℃ C. for 4h) are on the whole relative to the method 2, and after data fitting, the self-corrosion potential and the corrosion current density of the nitriding sample at 465 ℃ C. for 4h are superior to those of the method 2.
According to the invention, the surface of the stainless steel is subjected to nano treatment before salt bath nitriding, so that a large amount of dislocation and defects are formed on the surface of the stainless steel, the sizes of the obtained crystal grains are all in a nano level, no obvious interface exists between a nano structure and a matrix structure, and no delamination or separation occurs. The surface nanocrystallization improves the activity of the surface of the stainless steel material, and the nitrogen channel is increased, so that the nitriding temperature can be reduced, the precipitation of Cr element can be reduced, the corrosion resistance is improved compared with the traditional process, and the surface hardness of the stainless steel can be obviously improved. The nitriding temperature is lower, so that Cr element is prevented from being precipitated; after the salt bath infiltration treatment, a nitrided layer is formed on the surface of the stainless steel, so that the stainless steel has good surface performance.
The duplex stainless steel has the unique two-phase structure of ferrite phase and austenite phase, so that the duplex stainless steel has the advantages of both austenite and ferrite stainless steel, namely good pitting corrosion resistance and stress corrosion cracking resistance with excellent mechanical and welding properties. Duplex stainless steel has gained more and more acceptance and attention from countries and enterprises, and has been widely used in the fields of petroleum, chemical industry, natural gas, construction, paper making, marine exploration and other major projects. Therefore, the stainless steel of the present invention is preferably 2205 duplex stainless steel. After the salt bath nitriding is adopted to treat the duplex stainless steel, N can be combined with austenite to form a new phase, namely an S phase, which is a supersaturated solid solution of N in a gamma phase, and the stainless steel has better corrosion resistance and surface comprehensive performance.
Example 2
In this example, the difference from example 1 is that the shot diameter of shot used for shot blasting was 0.2mm, the pressure was 0.8MPa, and the time for high energy shot blasting was 15 min. The samples were salt bath nitrided at 465 ℃ for 2 hours.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (8)
1. A method for surface treatment of stainless steel is characterized by comprising the following steps:
step 1, shot blasting treatment is carried out on the surface of a stainless steel sample, so that the surface of the stainless steel sample is subjected to nanocrystallization;
and 2, performing salt bath nitriding treatment on the stainless steel sample subjected to the nanocrystallization treatment.
2. A method of surface treatment of stainless steel according to claim 1, characterized in that the shot peening in step 1 comprises the steps of:
sequentially polishing, degreasing, cleaning and blow-drying the surface of the stainless steel sample;
placing the processed stainless steel sample on shot blasting equipment for shot blasting treatment to enable the surface of the stainless steel sample to be nano-sized;
after shot blasting treatment, the stainless steel sample is sequentially degreased, cleaned and dried.
3. The method for treating the surface of the stainless steel according to claim 2, wherein the surface of the stainless steel sample is sequentially polished by silicon carbide abrasive paper, degreased by acetone, ultrasonically cleaned in ethanol solution and dried.
After shot blasting treatment, cleaning the stainless steel sample with acetone to remove oil stains, and then ultrasonically cleaning the stainless steel sample in an ethanol solution and drying the stainless steel sample.
4. The method for surface treatment of stainless steel according to claim 1, wherein the nitriding temperature of the salt bath nitriding of step 2 is 462 ℃ to 468 ℃.
5. The method for treating the surface of stainless steel according to claim 3, wherein the silicon carbide abrasive paper is 180-800 meshes.
6. The method for surface treatment of stainless steel according to claim 2, wherein the shot blasting apparatus is an ultrasonic shot blasting apparatus.
7. The method for treating the surface of the stainless steel as claimed in claim 3, wherein the sample is dried after being ultrasonically cleaned in the ethanol solution for 5 minutes.
8. The method of any one of claims 1 to 7, wherein the stainless steel sample is 2205 duplex stainless steel.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114458584A (en) * | 2022-02-17 | 2022-05-10 | 西华大学 | Diaphragm with surface compressive stress and preparation method and application thereof |
| CN115821201A (en) * | 2022-11-24 | 2023-03-21 | 西北有色金属研究院 | Preparation method of high-frequency induction pulse heating rapid chromizing coating on stainless steel surface |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108691003A (en) * | 2018-06-12 | 2018-10-23 | 常州大学 | A method of improving cobalt-base alloys surface comprehensive performance |
| CN111910234A (en) * | 2020-08-13 | 2020-11-10 | 广东工业大学 | Stainless steel surface treatment method |
-
2021
- 2021-04-07 CN CN202110371744.4A patent/CN113088978A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108691003A (en) * | 2018-06-12 | 2018-10-23 | 常州大学 | A method of improving cobalt-base alloys surface comprehensive performance |
| CN111910234A (en) * | 2020-08-13 | 2020-11-10 | 广东工业大学 | Stainless steel surface treatment method |
Non-Patent Citations (3)
| Title |
|---|
| 潘向南等: "表面纳米化对304奥氏体不锈钢渗氮的影响", 《热加工工艺》 * |
| 葛利玲等: "0Cr18Ni9不锈钢表面纳米化组织及其热稳定性对低温渗氮行为的影响", 《金属学报》 * |
| 陈明等: "低温渗氮技术的研究进展", 《热加工工艺》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114458584A (en) * | 2022-02-17 | 2022-05-10 | 西华大学 | Diaphragm with surface compressive stress and preparation method and application thereof |
| CN114458584B (en) * | 2022-02-17 | 2024-01-19 | 西华大学 | Diaphragm with surface compressive stress and preparation method and application thereof |
| CN115821201A (en) * | 2022-11-24 | 2023-03-21 | 西北有色金属研究院 | Preparation method of high-frequency induction pulse heating rapid chromizing coating on stainless steel surface |
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Application publication date: 20210709 |