CN106181586A - A kind of stainless steel weld joint or the anti-corrosion method in bending region - Google Patents
A kind of stainless steel weld joint or the anti-corrosion method in bending region Download PDFInfo
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- CN106181586A CN106181586A CN201610512215.0A CN201610512215A CN106181586A CN 106181586 A CN106181586 A CN 106181586A CN 201610512215 A CN201610512215 A CN 201610512215A CN 106181586 A CN106181586 A CN 106181586A
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- region
- intercrystalline corrosion
- corrosion
- stainless steel
- material intercrystalline
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- ing And Chemical Polishing (AREA)
Abstract
The invention belongs to process for treating surface, relate to a kind of stainless steel weld joint or the anti-corrosion method in bending region.It is characterized in that, etch-proof step is as follows: determine material intercrystalline corrosion region A；Material intercrystalline corrosion region A is carried out mechanical grinding processing；Material intercrystalline corrosion region A is ground；Part is carried out acid wash passivation process.The present invention proposes a kind of stainless steel weld joint or the anti-corrosion method in bending region, considerably increases 1Cr18Ni9Ti rustless steel resistance to corrosion under salt fog, hygrothermal environment, it is to avoid part occurs intercrystalline corrosion again, improves the service life of parts.
Description
Technical field
The invention belongs to process for treating surface, relate to a kind of stainless steel weld joint or the anti-corrosion method in bending region.
Background technology
Disclosed in " aeronautical material technology " (2012) that aircraft industry publishing house publishes, stainless steel material 1Cr18Ni9Ti belongs to
In universal chromiumnickel austenite stainless steel, its carbon content≤0.12%, carbon content is reduced to less than 0.03% and can fundamentally solve
Certainly intercrystalline corrosion, adding titanium in steel is that the intergranular for preventing general austenitic steel from occurring after insulation in the range of 500 800 DEG C is rotten
Erosion tendency, this steel has good antioxidation acid homogeneous corrosion, but anticorrosion stress-resistant is poor, is not requiring intergranular corrosion resistance feelings
Under condition, postwelding typically need not heat treatment.When welding processing or bending process, when about 650 DEG C high temperature, its contiguous zone can go out
Existing chromium depleted phenomenon, causes intergranular corrosion resistance performance to deteriorate, can produce yellow and hazel corrosion pit, current processing method
It is: mechanical grinding falls yellow and hazel corrosion pit then to carry out local Passivation Treatment.The shortcoming of this processing method
It is: after using under salt fog, hygrothermal environment for a long time that polishing region can occur intercrystalline corrosion again, again produces yellow and light brown
The corrosion pit of color, needs to re-start anti-corrosion treatment.Along with increasing of polishing number of times, intercrystalline corrosion corrosion frequency will
More and more, the cycle is shorter and shorter, reduces the service life of parts.
Summary of the invention
It is an object of the invention to: propose a kind of stainless steel weld joint or the anti-corrosion method in bending region, in order to increase
1Cr18Ni9Ti rustless steel resistance to corrosion under salt fog, hygrothermal environment, it is to avoid part occurs intercrystalline corrosion again, improves zero
The service life of parts.
The technical scheme is that a kind of stainless steel weld joint or the anti-corrosion method in bending region, stainless steel material
It is 1Cr18Ni9Ti, it is characterised in that etch-proof step is as follows:
1, material intercrystalline corrosion region A is determined: determine one of by the following method material intercrystalline corrosion region A:
1.1, for weld seam: material intercrystalline corrosion region A is positioned at weld seam both sides, symmetrical relative to weld seam, material intergranular is rotten
Width is weld width 8 times～12 times of erosion region A；
1.2, for bending region: material intercrystalline corrosion region A is positioned at the both sides that face M is vertically divided in bending region equally, and phase
Face M is vertically divided for bending region equally symmetrical, determines that the step of material intercrystalline corrosion region A size is:
1.2.1, determine that the datum mark B, datum mark B of one bent over arms of part are bending regions and the cutting of non-bending region
Point, datum mark B is positioned on the bent over arms outer surface of part one；
1.2.2, cross datum mark B and do the tangent line of crooked process radius r；
1.2.3, doing the parallel lines of above-mentioned tangent line, these parallel lines are L, L=1.2r～1.4r with the distance of above-mentioned tangent line, should
Another the intersection point of bent over arms outer surface of parallel lines and part is C, vertically divides the district the M of face from C point equally to bending region
Territory is the material intercrystalline corrosion region D in another bent over arms of part, and material intercrystalline corrosion region D is part whole material intergranular
The half of corrosion area A；
2, material intercrystalline corrosion region A is carried out mechanical grinding processing: with meeting the sand paper of GB GB/T15305, meeting
The coated abrasive tool of GB GB/T15305, meet the bonded abrasive tool of GB GB/T23541 or meet the mill steel of GB GB/T23541
Ball grinder buffing material intercrystalline corrosion region A, grinding depth is 0 μm～15 μm；
3, material intercrystalline corrosion region A is ground；Use and meet the stainless-steel grinding cream of GB GB/T4334 or grind
Mill liquid is ground 5min～15min to material intercrystalline corrosion region A；
4, part is carried out acid wash passivation process: use artificial or machine spraying method uniform application symbol to piece surface
Closing the acid-washing stainless steel passivating solution of GB GB/T20016, smearing thickness is 0.5mm～2mm, after ambient temperature curing 10min, with certainly
Water cleans surface part 10min～15min, air-dries more than 1h.
The invention have the advantage that and propose a kind of stainless steel weld joint or the anti-corrosion method in bending region, be greatly increased
1Cr18Ni9Ti rustless steel resistance to corrosion under salt fog, hygrothermal environment, it is to avoid part occurs intercrystalline corrosion again, carries
The high service life of parts.One embodiment of the present of invention, tests prove that, the service life of parts improves 2 times
Above.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention 1.
Detailed description of the invention
Below the present invention is described in further details.A kind of stainless steel weld joint or the anti-corrosion method in bending region,
Stainless steel material is 1Cr18Ni9Ti, it is characterised in that etch-proof step is as follows:
1, material intercrystalline corrosion region A is determined: determine one of by the following method material intercrystalline corrosion region A:
1.1, for weld seam: material intercrystalline corrosion region A is positioned at weld seam both sides, symmetrical relative to weld seam, material intergranular is rotten
Width is weld width 8 times～12 times of erosion region A；
1.2, for bending region: material intercrystalline corrosion region A is positioned at the both sides that face M is vertically divided in bending region equally, and phase
Face M is vertically divided for bending region equally symmetrical, determines that the step of material intercrystalline corrosion region A size is:
1.2.1, determine that the datum mark B, datum mark B of one bent over arms of part are bending regions and the cutting of non-bending region
Point, datum mark B is positioned on the bent over arms outer surface of part one；
1.2.2, cross datum mark B and do the tangent line of crooked process radius r；
1.2.3, doing the parallel lines of above-mentioned tangent line, these parallel lines are L, L=1.2r～1.4r with the distance of above-mentioned tangent line, should
Another the intersection point of bent over arms outer surface of parallel lines and part is C, vertically divides the district the M of face from C point equally to bending region
Territory is the material intercrystalline corrosion region D in another bent over arms of part, and material intercrystalline corrosion region D is part whole material intergranular
The half of corrosion area A；
2, material intercrystalline corrosion region A is carried out mechanical grinding processing: with meeting the sand paper of GB GB/T15305, meeting
The coated abrasive tool of GB GB/T15305, meet the bonded abrasive tool of GB GB/T23541 or meet the mill steel of GB GB/T23541
Ball grinder buffing material intercrystalline corrosion region A, grinding depth is 0 μm～15 μm；
3, material intercrystalline corrosion region A is ground；Use and meet the stainless-steel grinding cream of GB GB/T4334 or grind
Mill liquid is ground 5min～15min to material intercrystalline corrosion region A；
4, part is carried out acid wash passivation process: use artificial or machine spraying method uniform application symbol to piece surface
Closing the acid-washing stainless steel passivating solution of GB GB/T20016, smearing thickness is 0.5mm～2mm, after ambient temperature curing 10min, with certainly
Water cleans surface part 10min～15min, air-dries more than 1h.
Embodiment 1
Select the tubing of 1Cr18Ni9Ti-G33 × 1.5 specifications, use GTAW be welded into 300mm ×
150mm rectangle testpieces, carries out salt-fog resistant test and hot resistance test, respectively carries out 168 hours.
Salt-fog resistant test 56 hours observes commissure without any corrosion, within 112 hours, observes commissure without any corrosion, and 168
Hour observe commissure without any corrosion.
Hot resistance test 56 hours observes commissure without any corrosion, within 112 hours, observes commissure without any corrosion, and 168
Hour observe commissure without any corrosion.
Embodiment 2
Select 1Cr18Ni9Ti-δ 2 specification sheet material, use GTAW be welded into 300mm × 150mm ×
150mm L-shaped testpieces, carries out salt-fog resistant test and hot resistance test, respectively carries out 168 hours.
Salt-fog resistant test 56 hours observes commissure without any corrosion, within 112 hours, observes commissure without any corrosion, and 168
Hour observe commissure without any corrosion.
Hot resistance test 56 hours observes commissure without any corrosion, within 112 hours, observes commissure without any corrosion, and 168
Hour observe commissure without any corrosion.
Embodiment 3
Select the bar of 1Cr18Ni9Ti-φ 20 specification, use GTAW to weld the test that 8 fonts are tangent
Part, carries out salt-fog resistant test and hot resistance test, respectively carries out 168 hours.
Salt-fog resistant test 56 hours observes commissure without any corrosion, within 112 hours, observes commissure without any corrosion, and 168
Hour observe commissure without any corrosion.
Hot resistance test 56 hours observes commissure without any corrosion, within 112 hours, observes commissure without any corrosion, and 168
Hour observe commissure without any corrosion.
Claims (1)
1. stainless steel weld joint or the anti-corrosion method in bending region, stainless steel material is 1Cr18Ni9Ti, and its feature exists
In, etch-proof step is as follows:
1.1, material intercrystalline corrosion region A is determined: determine one of by the following method material intercrystalline corrosion region A:
1.1.1, for weld seam: material intercrystalline corrosion region A is positioned at weld seam both sides, symmetrical relative to weld seam, material intercrystalline corrosion
The width of region A is 8 times～12 times of weld width；
1.1.2, for bending region: material intercrystalline corrosion region A is positioned at and bends the both sides that face M is vertically divided in region equally, and relatively
Vertically divide face M equally in bending region symmetrical, determine that the step of material intercrystalline corrosion region A size is:
1.1.2.1, determine that the datum mark B, datum mark B of one bent over arms of part are the point of contacts bending region with non-bending region,
Datum mark B is positioned on the bent over arms outer surface of part one；
1.1.2.2, cross datum mark B and do the tangent line of crooked process radius r；
1.1.2.3, doing the parallel lines of above-mentioned tangent line, these parallel lines are L, L=1.2r～1.4r with the distance of above-mentioned tangent line, and this is put down
Another the intersection point of bent over arms outer surface of line and part is C, vertically divides the region the M of face from C point equally to bending region
It is that part whole material intergranular is rotten for the material intercrystalline corrosion region D in another bent over arms of part, material intercrystalline corrosion region D
The half of erosion region A；
1.2, material intercrystalline corrosion region A is carried out mechanical grinding processing: with meeting the sand paper of GB GB/T15305, meeting state
Mark the coated abrasive tool of GB/T15305, meet the bonded abrasive tool of GB GB/T23541 or meet the mill steel ball of GB GB/T23541
Grinder buffing material intercrystalline corrosion region A, grinding depth is 0 μm～15 μm；
1.3, material intercrystalline corrosion region A is ground；Use stainless-steel grinding cream or the grinding meeting GB GB/T4334
Liquid is ground 5min～15min to material intercrystalline corrosion region A；
1.4, part is carried out acid wash passivation process: use manually to piece surface or machine spraying method uniform application meets
The acid-washing stainless steel passivating solution of GB GB/T20016, smearing thickness is 0.5mm～2mm, after ambient temperature curing 10min, with from the beginning
Water cleans surface part 10min～15min, air-dries more than 1h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610512215.0A CN106181586A (en) | 2016-07-01 | 2016-07-01 | A kind of stainless steel weld joint or the anti-corrosion method in bending region |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610512215.0A CN106181586A (en) | 2016-07-01 | 2016-07-01 | A kind of stainless steel weld joint or the anti-corrosion method in bending region |
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| Publication Number | Publication Date |
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| CN106181586A true CN106181586A (en) | 2016-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610512215.0A Pending CN106181586A (en) | 2016-07-01 | 2016-07-01 | A kind of stainless steel weld joint or the anti-corrosion method in bending region |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107245703A (en) * | 2017-05-31 | 2017-10-13 | 江苏金基特钢有限公司 | It is a kind of to reduce the method for making Nano of Intergranular Corrosion of Austenitic Stainless Steel |
| CN111408857A (en) * | 2019-12-25 | 2020-07-14 | 丽水市正阳电力设计院有限公司 | Treatment method for weather-resistant steel welding seam |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE60105653T2 (en) * | 2000-12-18 | 2005-09-29 | Centro Sviluppo Materiali S.P.A. | CONTINUOUS ELECTROLYTIC FURNING AND DECOMPOSITION OF UNLOCKED STEEL AND NON-STAINLESS STEEL |
| CN104120438A (en) * | 2014-07-22 | 2014-10-29 | 中冶南方工程技术有限公司 | Pickling production method for hot-rolling 304 Austenitic stainless steel strip steel |
| CN105256368A (en) * | 2015-11-11 | 2016-01-20 | 无锡清杨机械制造有限公司 | Stainless steel polishing method |
| CN105525297A (en) * | 2014-09-30 | 2016-04-27 | 青岛三利中德美水设备有限公司 | Stainless steel acid-pickling passivating solution |
-
2016
- 2016-07-01 CN CN201610512215.0A patent/CN106181586A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE60105653T2 (en) * | 2000-12-18 | 2005-09-29 | Centro Sviluppo Materiali S.P.A. | CONTINUOUS ELECTROLYTIC FURNING AND DECOMPOSITION OF UNLOCKED STEEL AND NON-STAINLESS STEEL |
| CN104120438A (en) * | 2014-07-22 | 2014-10-29 | 中冶南方工程技术有限公司 | Pickling production method for hot-rolling 304 Austenitic stainless steel strip steel |
| CN105525297A (en) * | 2014-09-30 | 2016-04-27 | 青岛三利中德美水设备有限公司 | Stainless steel acid-pickling passivating solution |
| CN105256368A (en) * | 2015-11-11 | 2016-01-20 | 无锡清杨机械制造有限公司 | Stainless steel polishing method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107245703A (en) * | 2017-05-31 | 2017-10-13 | 江苏金基特钢有限公司 | It is a kind of to reduce the method for making Nano of Intergranular Corrosion of Austenitic Stainless Steel |
| CN111408857A (en) * | 2019-12-25 | 2020-07-14 | 丽水市正阳电力设计院有限公司 | Treatment method for weather-resistant steel welding seam |
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Application publication date: 20161207 |
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