CN1757484A - Glass shot blasting treatment process for improving stress corrosion resistance of stainless steel welded joint - Google Patents
Glass shot blasting treatment process for improving stress corrosion resistance of stainless steel welded joint Download PDFInfo
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- CN1757484A CN1757484A CN200510094763.8A CN200510094763A CN1757484A CN 1757484 A CN1757484 A CN 1757484A CN 200510094763 A CN200510094763 A CN 200510094763A CN 1757484 A CN1757484 A CN 1757484A
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- glass
- stainless steel
- bullet
- stress corrosion
- welding
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- 239000011521 glass Substances 0.000 title claims abstract description 65
- 230000007797 corrosion Effects 0.000 title claims abstract description 27
- 238000005260 corrosion Methods 0.000 title claims abstract description 27
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 22
- 239000010935 stainless steel Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000005422 blasting Methods 0.000 title abstract 5
- 238000003466 welding Methods 0.000 claims abstract description 53
- 238000012545 processing Methods 0.000 claims abstract description 12
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- 238000000576 coating method Methods 0.000 claims abstract description 6
- 238000005480 shot peening Methods 0.000 claims description 25
- 239000011324 bead Substances 0.000 claims description 18
- 238000002347 injection Methods 0.000 claims description 16
- 239000007924 injection Substances 0.000 claims description 16
- 229910001566 austenite Inorganic materials 0.000 claims description 14
- 230000002180 anti-stress Effects 0.000 claims description 12
- 239000008188 pellet Substances 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 9
- 238000003672 processing method Methods 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 3
- 230000002950 deficient Effects 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 239000000470 constituent Substances 0.000 claims description 2
- 238000005336 cracking Methods 0.000 abstract description 9
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 238000004381 surface treatment Methods 0.000 abstract description 3
- 229910000963 austenitic stainless steel Inorganic materials 0.000 abstract 1
- 239000000428 dust Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 238000005728 strengthening Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000006056 electrooxidation reaction Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000023753 dehiscence Effects 0.000 description 2
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000005361 soda-lime glass Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
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- Arc Welding In General (AREA)
Abstract
The invention discloses a glass shot blasting treatment process for improving the stress corrosion resistance of a stainless steel welding joint, and relates to a surface treatment method for reducing the stress corrosion cracking sensitivity of an austenitic stainless steel welding joint. The process comprises the following steps: (1) before glass shot blasting, a certain surface cleaning treatment method is adopted to remove all dust, water scale and coatings from the surface of a workpiece to be subjected to shot blasting; (2) aligning a jet welding gun to a welding seam area to be processed, driving a glass shot through compressed air to enable the glass shot to reach a welding seam processing area determined by high-speed post-jet, wherein the distance between a welding nozzle of the welding gun and the surface of a workpiece to be welded in the process of processing needs to be kept, the jet angle between a glass shot beam and the surface of the workpiece to be welded is controlled to be 70-100 degrees, and (3) after the glass shot blasting processing, the surface of the workpiece to be welded needs to be cleaned, glass residues remained on the surface of the workpiece are removed, an X-ray diffractometer is used for detecting, and the residual stress on the surface of the workpiece to be welded is compressive stress, namely qualified.
Description
Technical field
What the present invention improved that the glass cloudburst treatment art of anti-stress corrosion performance of welding joint of stainless steel relates to is a kind of surface treatment method that reduces the austenite stainless steel welding joint stress corrosion opening cracking maleate sensitivity.
Background technology
Use in the stainless department in petrochemical industry, weaving, papermaking, atomic energy, medicine, space travel and ocean development etc., near the stress corrosion cracking accident that takes place welding point accounts for 47% of hygrometric state corrosion and damage accident.The experimental results shows that the existence of welding vestige stress is to cause one of principal element of austenite stainless steel welding joint stress corrosion cracking.Bead is a kind of method of comparatively ideal elimination welding vestige stress, and it is to utilize high speed pellet injection welding point surface, makes it that plastic deformation take place, and forms certain thickness residual compressive stress layer.This processing method has many advantages such as remarkable, the with low cost and adaptability of strengthening effect is good.But for this surface treatment method, mainly select for use shot to carry out bead at present, this type of treatment process is because crisp of shot remains on the test specimen surface, and its electrochemical corrosion that causes will be unfavorable for austenite stainless steel welding joint opposing stress corrosion.
Summary of the invention
The objective of the invention is at the problems referred to above, the cloudburst treatment art that improves the austenite stainless steel welding joint anti-stress corrosion performance is improved, propose a kind of application glass ball and replace shot to carry out bead, improve the new treatment process of austenite stainless steel welding joint stress corrosion opening cracking maleate sensitivity with this.This processing method has improved the performance of austenite stainless steel welding joint stress corrosion dehiscence resistant, the electrochemical corrosion problem that has run into when effectively having avoided adopting shot to carry out bead.
Improve the glass cloudburst treatment art of austenite stainless steel welding joint anti-stress corrosion performance:
1, adopt certain cleaning surfaces processing method to remove all dirt, incrustation scale and coating before the glass bead from treating the surface of the work that shot-peening is handled.When needing, magnetic detection, dye penetration detection, ultrasonic wave or other defective and crack detection process will be finished before the glass bead.The quality of glass bullet will reach certain requirement.
2, will spray the zone that welding gun is aimed at needs processing, owing to welding residual stress is present in weld seam and the welding heat affected zone, so glass bead zone is decided to be weld seam and heat affected area, weld seam both sides width.The heat affected area width is 2～3 times of weld widths.Then, by the compressed air-driven bullet, make it reach the weld seam processing region that back injection is at a high speed determined.In order to reach the shot peening strength of regulation, it is 8～10m that air compressor machine produces compressed air require
3/ min, outlet pressure are 0.4～0.6MPa.Need to keep welding gun tip and the distance that is connect surface of the work by surfacing in the processing, generally the pellet injection distance is controlled in the scope of 150～250mm.The spray angle on glass bullet bundle and welding work pieces surface is controlled at 70 °～100 °.Simultaneously, spraying coverage rate requires to reach 100%～200%.
3, certain cleaning work need be carried out in processed welding work pieces surface after the glass bead, removes the glass residue that remains in surface of the work.Adopt X-ray diffractometer to detect, the residual stress on welding work pieces surface is a compression, and it is qualified to be.
The main control parameters that improves the glass cloudburst treatment art of anti-stress corrosion performance of welding joint of stainless steel comprises as follows:
(1) glass bullet intensity: shot peening strength is a kind of the measuring of workpiece shot peening strengthening degree, is a kind of index that proposes in order to weigh these shot-blast process parametric synthesis effects of (2)-(9).At present both at home and abroad, generally adopt arc-height test piece method (Almen test piece method) and measure shot peening strength, the arc of curvature height value fA of Almen test piece behind pellet injection is shot peening strength.
(2) glass bullet shape and outward appearance: the quality of glass bullet is answered strict guarantee, guarantees that spherical shape and size are even, and bullet broken, distortion must in time be removed, otherwise can stay cut to surface of the work.The bullet that is used for shot peening strengthening, wherein the total amount of broken bullet must not surpass 20% of gross weight, to guarantee the effect of shot peening strengthening.
(3) glass bullet chemical composition: the glass bullet should be made by the high-quality soda-lime glass, must possess the ability that opposing is impacted and rubbed, and prevents fragmentation.The inherent chemical substance that to pollute workpiece be can not contain in the bullet, except that special circumstances, organic silicon coating or any other coating do not allowed yet.Glass bullet chemical constituent percentage by weight is 67～80% SiO
2, 8～15% CaO, 10～15% Na
2O, 4～5% MgO.Characteristic density is 2.5g/cm
3For guaranteeing better chemical stability, the SiO in the glass bullet
2Content should not be less than 67%.
(4) glass bullet hardness: the selection of glass bullet hardness should be considered the hardness of workpiece material.Total principle is: when the hardness of glass bullet is sprayed the hardness of workpiece material more than or equal to quilt, can obtain shot-peening effect preferably.
(5) glass bullet diameter: the common 0.05～0.4mm of glass bullet diameter that is used for the glass shot peening strengthening.When selecting glass bullet diameter, excessive bullet for certain workpiece position (fillet) may spray less than situation, too small bullet diameter can be greatly affected shot peening strength because of its weight again inadequately.Simultaneously, the selection of bullet diameter also should consider to be sprayed the requirement of workpiece surface roughness.Following at identical shot peening strength, the surface smoothing that the big bullet shot-peening of the surface ratio that adopts the dust-shot shot-peening to obtain obtains, but require the required shot-peening time to increase rapidly along with reducing of size in order to reach coverage rate, big bullet then can reach the requirement of coverage rate faster.Therefore if having higher requirement should select less glass bullet for use to the workpiece surface roughness behind the shot-peening.
(6) compressed air require and pressure: when adopting air peener to carry out the glass bead, air peener makes it reach the high speed back and sprays by the spray surface of the work with formation residual compressive stress layer with the compressed air-driven bullet.In order to reach the shot peening strength of regulation, must guarantee compressed-air actuated flow and the outlet pressure that air compressor machine produces.
(7) pellet injection distance: pellet injection distance is meant the distance of nozzle and surface of the work maintenance when adopting air peener to carry out shot peening strengthening handles.In order to guarantee shot peening strength and form desirable residual compressive stress layer that pellet injection must be controlled in certain scope apart from this parameter value.
(8) pellet injection angle: jet angle is meant the angle that glass bullet bundle sprays to surface of the work, and effectively shot peening strength is directly proportional with the sine of jet angle, intensity maximum during therefore vertical the injection.
(9) coverage rate: on the regulation position of bead blasted surfaces, the area that shoot mark occupies is called coverage rate with the ratio of the ratio of the area that needs shot peening strengthening.Coverage rate is represented with percentage.100% coverage rate can't determine, generally adopts 98% coverage rate to represent a unit of coverage rate.Therefore, require coverage rate more than or equal to 100% o'clock, the area that shoot mark occupies on the unit are at least should be more than 98%, and the coverage rate greater than 100% is represented with the multiple of 98% coverage rate desired shot-peening time usually.
The glass cloudburst treatment art that improves anti-stress corrosion performance of welding joint of stainless steel can hardened stainless steel welding point stress corrosion cracking ability.Its mechanism: the fundamental cause of welding point generation stress corrosion cracking is because there is welding vestige stress in welded seam area, can form the residual compressive stress layer on the welding point top layer after the glass bead, thereby the necessary condition that the bursting stress corrosion cracking takes place reaches the purpose of hardened stainless steel welding point stress corrosion cracking ability with this.This processing method can improve the performance of austenite stainless steel welding joint stress corrosion dehiscence resistant, the electrochemical corrosion problem that has run into when effectively having avoided adopting shot to carry out bead.This treatment process can be fit to the reinforcement of various ways welding point.
Description of drawings
Below with reference to accompanying drawing invention is described further.
Fig. 1 is the schematic diagram of pellet injection angle of the present invention.
The specific embodiment
With reference to accompanying drawing 1, improve the glass cloudburst treatment art of austenite stainless steel welding joint anti-stress corrosion performance:
1, adopt certain cleaning surfaces processing method to remove all dirt, incrustation scale and coating before the glass bead from pending workpiece 2 surfaces.When needing, magnetic detection, dye penetration detection, ultrasonic wave or other defective and crack detection process will be finished before the glass bead.The quality of glass bullet will reach certain requirement.
2, welding gun 1 be will spray and weld seam and the heat-affected zone that needs processing, heat affected area width d aimed at
2Be weld width d
12～3 times, be 10mm as weld width, the heat affected area width of weld seam both sides is about 20～30mm.Then, by the compressed air-driven bullet, make it reach the weld seam processing region that back injection is at a high speed determined.In order to reach the shot peening strength of regulation, it is 8～10m that air compressor machine produces compressed air require
3/ min, outlet pressure are 0.4～0.6MPa.Need to keep welding gun tip and the distance that is connect surface of the work by surfacing in the processing, generally the pellet injection distance is controlled in the scope of 150～250mm.Glass bullet bundle 3 is controlled at 70 °～100 ° with the spray angle α on welding work pieces surface 2.Simultaneously, spraying coverage rate requires to reach 100%～200%.
3, certain cleaning work need be carried out in processed welding work pieces surface after the glass bead, removes the glass residue that remains in surface of the work.Adopt X-ray diffractometer to detect, the residual stress on welding work pieces surface is a compression, and it is qualified to be.
Being chosen as of the main control parameters of the glass cloudburst treatment art of raising austenite stainless steel welding joint anti-stress corrosion performance:
1, glass bullet intensity: reach 0.2～0.3mmA basically.
2, glass bullet chemical composition: 72.5% SiO
2, 9.75% CaO, 13% Na
2O, 3.3% MgO, characteristic density are 2.5g/cm
3
3, glass bullet hardness: reach Mohs' hardness 5.5～6.5.
4, glass bullet diameter: 0.2mm.
5, compressed air require and pressure: 8m
3/ min, 0.4MPa (gauge pressure).
6, glass pellet injection distance: 250mm.
7, pellet injection angle: 90 °
8, coverage rate: reach more than 100%.
After the processing, adopt X-ray diffractometer to detect the welding work pieces treatment surface, the residual stress at test point place is compression, and maximum reaches-364MPa.
Claims (4)
1, a kind of glass cloudburst treatment art that improves the austenite stainless steel welding joint anti-stress corrosion performance is characterized in that
(1) adopt certain cleaning surfaces processing method to remove all dirt, incrustation scale and coating before the glass bead from treating the surface of the work that shot-peening is handled, when needing, magnetic detection, dye penetration detection, ultrasonic wave or other defective and crack detection process will be finished before the glass bead;
(2) will spray welding gun and aim at pending zone, and treat that the zone will be weld seam and heat affected area, weld seam both sides width, the heat affected area width is 2～3 times of weld width.Then, by the compressed air-driven bullet, make it reach the weld seam processing region that back injection is at a high speed determined, in order to reach the shot peening strength of regulation, the compressed-air actuated flow that air compressor machine produces is 8～10m
3/ min, outlet pressure are 0.4～0.6MPa, need to keep welding gun tip and the distance that is connect surface of the work by surfacing in the processing, generally the pellet injection distance is controlled in the scope of 150～250mm, the spray angle on glass bullet bundle and welding work pieces surface is controlled at 70 °～100 °, simultaneously, spraying coverage rate requires to reach 100%～200%;
(3) certain cleaning work need be carried out in processed welding work pieces surface after the glass bead, removes the glass residue that remains in surface of the work, adopts X-ray diffractometer to detect, and the residual stress on welding work pieces surface is a compression, and it is qualified to be.
2, the glass cloudburst treatment art of raising austenite stainless steel welding joint anti-stress corrosion performance according to claim 1 is characterized in that glass bullet chemical constituent percentage by weight is 67～80% SiO
2, 8～15% CaO, 10～15% Na
2O, 4～5% MgO.
3, the glass cloudburst treatment art of raising austenite stainless steel welding joint anti-stress corrosion performance according to claim 1 is characterized in that the common 0.05～0.4mm of glass bullet diameter.
4, the glass cloudburst treatment art of raising austenite stainless steel welding joint anti-stress corrosion performance according to claim 1 and 2 is characterized in that glass bullet intensity: 0.2～0.3mmA, glass bullet hardness: reach Mohs' hardness 5.5～6.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100947638A CN100542751C (en) | 2005-10-13 | 2005-10-13 | Glass shot blasting treatment process for improving stress corrosion resistance of stainless steel welded joint |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100947638A CN100542751C (en) | 2005-10-13 | 2005-10-13 | Glass shot blasting treatment process for improving stress corrosion resistance of stainless steel welded joint |
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| Publication Number | Publication Date |
|---|---|
| CN1757484A true CN1757484A (en) | 2006-04-12 |
| CN100542751C CN100542751C (en) | 2009-09-23 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103805760A (en) * | 2014-02-28 | 2014-05-21 | 中国石油大学(华东) | Method for eliminating welding residual stress by utilizing high-pressure water jet |
| CN107641697A (en) * | 2016-07-20 | 2018-01-30 | 株式会社日立制作所 | Bead for the tolerance that cavitates |
| CN108838904A (en) * | 2018-07-09 | 2018-11-20 | 西北工业大学 | A method of reducing structural metallic materials joint made by flame welding residual stress |
| CN109641329A (en) * | 2016-08-31 | 2019-04-16 | 卡特彼勒公司 | The method for remanufacturing pre-burning chamber component |
| CN114196805A (en) * | 2021-12-22 | 2022-03-18 | 天信管业科技集团有限公司 | Surface strengthening treatment method for stainless steel composite pipe welding joint |
| CN117066751A (en) * | 2023-10-18 | 2023-11-17 | 中国航空制造技术研究院 | Shot blasting forming method for welded wallboard |
-
2005
- 2005-10-13 CN CNB2005100947638A patent/CN100542751C/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103805760A (en) * | 2014-02-28 | 2014-05-21 | 中国石油大学(华东) | Method for eliminating welding residual stress by utilizing high-pressure water jet |
| CN103805760B (en) * | 2014-02-28 | 2015-10-28 | 中国石油大学(华东) | A kind of method utilizing high-pressure water jet to eliminate welding residual stress |
| CN107641697A (en) * | 2016-07-20 | 2018-01-30 | 株式会社日立制作所 | Bead for the tolerance that cavitates |
| CN109641329A (en) * | 2016-08-31 | 2019-04-16 | 卡特彼勒公司 | The method for remanufacturing pre-burning chamber component |
| CN109641329B (en) * | 2016-08-31 | 2021-07-16 | 卡特彼勒公司 | Method of remanufacturing a pre-chamber assembly |
| CN108838904A (en) * | 2018-07-09 | 2018-11-20 | 西北工业大学 | A method of reducing structural metallic materials joint made by flame welding residual stress |
| CN114196805A (en) * | 2021-12-22 | 2022-03-18 | 天信管业科技集团有限公司 | Surface strengthening treatment method for stainless steel composite pipe welding joint |
| CN114196805B (en) * | 2021-12-22 | 2022-08-12 | 天信管业科技集团有限公司 | Surface strengthening treatment method for stainless steel composite pipe welding joint |
| CN117066751A (en) * | 2023-10-18 | 2023-11-17 | 中国航空制造技术研究院 | Shot blasting forming method for welded wallboard |
| CN117066751B (en) * | 2023-10-18 | 2023-12-15 | 中国航空制造技术研究院 | Shot blasting forming method for welded wallboard |
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| Publication number | Publication date |
|---|---|
| CN100542751C (en) | 2009-09-23 |
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Assignee: YANGZHOU SANYE HEAT RADIATOR Co.,Ltd. Assignor: Nanjing Tech University Contract fulfillment period: 2009.8.5 to 2014.8.4 Contract record no.: 2009320001487 Denomination of invention: Glass cloudburst treatment art for improving anti-stress corrosion performance of welding joint of stainless steel Granted publication date: 20090923 License type: Exclusive license Record date: 20090811 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.8.5 TO 2014.8.4; CHANGE OF CONTRACT Name of requester: YANGZHOU SANYE RADIATOR CO., LTD. Effective date: 20090811 |