CN101032780A - 904L stainless steel welding method - Google Patents
904L stainless steel welding method Download PDFInfo
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- CN101032780A CN101032780A CN 200710061597 CN200710061597A CN101032780A CN 101032780 A CN101032780 A CN 101032780A CN 200710061597 CN200710061597 CN 200710061597 CN 200710061597 A CN200710061597 A CN 200710061597A CN 101032780 A CN101032780 A CN 101032780A
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Abstract
The 904L stainless steel welding process includes two steps, including manual tungsten pole argon arc welding and acid pickling and deactivating the weld seam surface. After being treated, the joints are welded with the welding wire of 904L and the weld seam is cooled with cold water, with the welding temperature being controlled below 80 deg.c, the welding speed being 45-50 cm/min, the weld seam depth/width ratio being kept in 1.5-2, and the welded workpiece having thickness not greater than 12 mm. The weld seam is then pickled and deactivated. The present invention has the advantages of low temperature welding, no molecule conversion inside 904L stainless steel, no generation of welding faults, less integrated deformation of the welded workpiece and long service life of the welded workpiece.
Description
Technical field
The present invention relates to a kind of extraordinary low-carbon (LC) two-phase austenite stainless steel welding technology field, specifically a kind of 904L stainless steel welding method,
Background technology
The 904L stainless steel now has been widely used in the industry of seriously corrodeds such as aviation, chemical fibre, food, steel are all from external import, the 904L stainless steel belongs to low-carbon (LC) two-phase austenitic stainless steel, resistance to corrosion own is very strong, but it is compared with common 304,316L, 320 austenitic stainless steels, the welding difficulty is big, and bad grasp still is technological difficulties in China.So in our FCFC, being corroded a complete set of welding equipment (as: two baths, jet pump etc.) that 904L on the most serious spinning-drawing machine makes and all be the Austrian Lenzin company that has a world lead level by the stainless steel solder technology introduces, because of the equipment long period of soaking in concentrated acid, caustic soda, high-temperature steam, weld seam macro-corrosion, damage, cause the serious consequence of repeatedly stopping and stopping production, jet pump its weld seam after using six months just corrodes and comes off, and two baths weld seam in less than one-year age will damage.Above problem is caused by welding quality that all the cost of these equipment is very high, causes and have a strong impact on for the economy of whole enterprise, production.
Summary of the invention
The objective of the invention is to defective at prior art, provide the cooling of a kind of welding and cold water to carry out simultaneously, postwelding is without heat treatment, thereby avoid the inner character of stainless steel, structure to change, can be with the postwelding fire check, intercrystalline corrosion, defectives such as bulk deformation are kept to minimum, prolong the weldment stainless welding technique of a kind of 904L in service life greatly.
Realize the foregoing invention purpose by the following technical solutions: a kind of 904L stainless steel welding method, comprise welding gun, (1) adopts the GTAW welding, the joint bevel that comprise the steps: a, will prepare welding adopts the method for machining smooth, and with organic solution with its scrub; B, employing chemical composition ratio are: C 0.03, Cr 18.05, Ni 24.66, and Mo 5.44, and the welding wire of the 904L material of the same race of Cu 2.48 is done the filling metal of weld seam, one side welding one side is watered weld seam with cold water, welding temperature is controlled at below 80 ℃, reduces to room temperature in 2 seconds behind the receipts arc, and speed of welding is more than 45～50 cm per minute, the weld seam breadth depth ratio remains between 1.5: 1～2: 1, weldment thickness≤12mm; C, the weld seam that contacts with corrosive medium weld at last; (2) carrying out acid wash passivation at face of weld handles and to carry out according to following steps: a, polishing oils: smear weld seam with quartz sand or diatomite, smearing thickness is 2 millimeter, polishes with brusher.B, carefully rinse well with cold water; C, wet with the salpeter solution passivation weldering of 5%--20%; D, passivation are clean with cold water flush after 2 hours; E, weld seam is dried up with compressed air.
Beneficial effect of the present invention shows: utilize welding and cold water to water weld seam reduction welding temperature fast simultaneously, make stainless steel itself that conversion between interior molecules (crystal) not take place.Advantage is to avoid (the 475 ℃ of stainless steel embrittlement transformations of welding temperature height, 450～850 ℃ of generation intercrystalline corrosion) produce various intercrystalline corrosion, fire check, defectives such as stress deformation, can give full play to that 904L stainless steel itself is antiacid, the instinct of alkali, high temperature corrosion, prolonging the service life of weldment greatly, is a kind of welding method of simple possible.
Description of drawings:
Fig. 1 is the welding of the present invention " V " type joint form, cold water refrigerating method schematic diagram.
Fig. 2 is fillet-welded joint form welding of the present invention, cold water refrigerating method schematic diagram.
The specific embodiment:
The present invention will be further described below in conjunction with drawings and Examples.
A kind of 904L stainless steel welding method, it comprises adopts GTAW welding and acid wash passivation to handle two big steps.(1) adopt the GTAW welding to comprise the steps:
A, the joint bevel that will prepare welding adopt the method for machining smooth, and with organic solution with its scrub;
B, employing chemical composition ratio are: C 0.03, Cr 18.05, Ni 24.66, Mo 5.44, the filling metal that the welding wire of the 904L material of the same race of Cu 2.48 is done, and one side welding one side is watered weld seam with cold water, water can not directly contact the molten bath, it is big that the cold water water yield is wanted, and welding temperature is controlled at below 80 ℃, reduces to room temperature in 2 seconds behind the receipts arc.It is fast that speed of welding is wanted, and speed of welding is more than 45～50 cm per minute, and the weld seam breadth depth ratio remains between 1.5: 1～2: 1, weldment thickness≤12mm; C, the weld seam that contacts with corrosive medium weld at last, if butt weld adopts backing plate to cool off welding.
(2) carrying out the acid wash passivation processing at face of weld after the weld seam welding finishes carries out according to following steps:
A, polishing oils: smear weld seam with quartz sand or diatomite, smearing thickness is 2 millimeter, polishes with brusher;
B, weld seam is carefully rinsed well with cold water;
C, wet with the salpeter solution passivation weldering of 5%--20%;
D, passivation are clean with cold water flush after 2 hours;
E, weld seam is dried up with compressed air.
Two baths that 904L stainless steel of the present invention is made specifically weld example:
Method of operating is as follows:
1, facility and welding material
(1) welding equipment is selected the good contravariant welding machine of characteristic for use.
(2) should remove things such as surperficial oil, dirt, burr before argon arc welding wire uses.
2, prepare before the weldering
(1) cleaning: the general machining process that adopts of the making of edge or groove and preparation, to use the acetone scrub in the 20～30mm scope of commissure.
(2) butt joint assembling: point admittedly will be with compressing with the welding wire of material or with anchor clamps with weldment before the weldering.Promptly welding or tack welding must use the lath of cutting on the welding wire that is complementary with mother metal or the mother metal to make welding wire to use.
(3) weld seam must use string(er) bead, avoids weld defect, and the weld seam breadth depth ratio remains between 1.5: 1～2: 1.
(4) welding gun tip diameter is φ 8, and tungsten electrode is the cerium tungsten electrode of φ 2.4, and the welding gun argon flow amount is 10～15L/min, the purity 99.9% of argon gas.
(5) welding procedure is referring to accompanying drawing 1 and accompanying drawing 2: speed of welding wants fast, and more than 45～50cm/min, one side simultaneously be watered weld seam with cold water pipe 2 with welding gun 1 welding, water can not directly contact the molten bath, it is big that the water yield is wanted, and the control welding temperature is below 80 ℃, and welding parameter sees Table 1.
Table 1 welding parameter
| Thickness of slab/mm | Joint form | The current range electric current | Tungsten electrode diameter/mm | Speed of welding cm/min | Argon flow amount L/min | Nozzle diameter mm | Arc voltage/V | Remarks | |
| Polarity | Electric current/A | ||||||||
| 4 | The I type | Straight polarity direct current | 90～100 | 2.4 | 45～50 | 10～15 | 8 | 12 | When the water yield was big, the magnitude of current was also suitably big.Use the backing plate (see figure 2) during I type joint water refrigeration. |
| The angle type | |||||||||
(4) postwelding acid wash passivation treatment process:
A, polishing oils: smear weld seam with quartz sand or diatomite, smearing thickness is 2 millimeter, polishes with brusher.
B, carefully weld seam is rinsed well with cold water.
C, wet with the salpeter solution passivation weldering of 5%--20%.
D, passivation are clean with cold water flush after 2 hours.
E, weld seam is dried up with compressed air.
5, mechanical performance index: the mechanical property of welding procedure of the present invention sees Table 2.
The mechanical property of table 2 welding procedure
| Tensile strength MPa | Yield strength MPa | Percentage elongation % | Impact flexibility J/cm 2 | Hardness HB |
| ≥480 | ≥448 | ≥40 | ≥87 | ≤187 |
When the advantage of welding procedure of the present invention is welding, temperature is controlled at below 80 ℃, has overcome high-temperature soldering and be prone to fire check, intercrystalline corrosion, the defective of stress deformation. 904L stainless steel weldment two baths that my company makes, jet pump etc., after using these processes, the time no-welding-seam in 3 years of extending to service life by original import equipment 6 months～a year damages and comes off, only this item was just saved more than 500 ten thousand yuan for enterprise in 1 year, this technological operation is simple, can extensively promote.
Claims (2)
1, a kind of 904L stainless steel welding method comprises welding gun, it is characterized in that,
(1) adopts the GTAW welding, comprise the steps:
A, the joint bevel that will prepare welding adopt the method for machining smooth, and with organic solution with its scrub;
B, with the chemical composition ratio be: C 0.03, Cr 18.05, Ni 24.66, and Mo 5.44, and the welding wire of the 904L material of the same race of Cu 2.48 is done the filling metal of weld seam, one side welding one side is watered weld seam with cold water, welding temperature is controlled at below 80 ℃, reduces to room temperature in 2 seconds behind the receipts arc, and speed of welding is more than 45～50 cm per minute, the weld seam breadth depth ratio remains between 1.5: 1～2: 1, weldment thickness≤12mm;
C, the weld seam that contacts with corrosive medium weld at last;
(2) carrying out the acid wash passivation processing at face of weld carries out according to following steps:
A, polishing oils: smear weld seam with quartz sand or diatomite, smearing thickness is 2 millimeter, polishes with brusher;
B, weld seam is rinsed well with cold water;
C, wet with the salpeter solution passivation weldering of 5%--20%;
D, passivation are clean with cold water flush after 2 hours;
E, weld seam is dried up with compressed air.
2, a kind of 904L stainless steel welding method according to claim 1 is characterized in that, described welding gun tip diameter is φ 8, and tungsten electrode is φ 2.4, adopts the cerium tungsten electrode, and the welding gun argon flow amount is 10～15L/min, and the purity of this argon gas is higher than 99.8%.
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| CN 200710061597 CN101032780A (en) | 2007-03-16 | 2007-03-16 | 904L stainless steel welding method |
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| CN 200710061597 CN101032780A (en) | 2007-03-16 | 2007-03-16 | 904L stainless steel welding method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101947681A (en) * | 2010-09-20 | 2011-01-19 | 浙江诚信医化设备有限公司 | Welding technology of stainless steel measuring tank |
| CN102451946A (en) * | 2010-10-25 | 2012-05-16 | 宝山钢铁股份有限公司 | Stable welding method for argon arc welding of high-silicon-content silicon steel |
| CN102554403A (en) * | 2012-02-02 | 2012-07-11 | 蓬莱中柏京鲁船业有限公司 | Method for preparing stainless steel jointed board for shipbuilding |
| CN102676063A (en) * | 2012-04-26 | 2012-09-19 | 武汉铁锚焊接材料股份有限公司 | Method and special polishing liquid for reworking and repairing solid welding wires |
| CN103648708A (en) * | 2011-07-06 | 2014-03-19 | 新日铁住金株式会社 | Austenite steel welded joint |
| CN104889544A (en) * | 2015-05-19 | 2015-09-09 | 沈阳富创精密设备有限公司 | Stainless steel cavity preheating transmission cavity welding process |
| CN109128453A (en) * | 2018-08-24 | 2019-01-04 | 沈阳富创精密设备有限公司 | A kind of device monitored in real time and control welding deformation |
| CN111203611A (en) * | 2020-01-16 | 2020-05-29 | 中国航发长江动力有限公司 | Welding method and welding part of multilayer thin-wall metal material |
| CN111570559A (en) * | 2020-05-18 | 2020-08-25 | 中国石油天然气集团有限公司 | Low-carbon high-strength austenitic stainless steel continuous tube and preparation method thereof |
| CN114160930A (en) * | 2021-12-27 | 2022-03-11 | 西安西材三川智能制造有限公司 | Molybdenum-lanthanum alloy pipeline argon arc welding process |
| CN114871533A (en) * | 2022-04-22 | 2022-08-09 | 中船澄西(泰州)装备科技有限公司 | Welding test method for S30408 austenitic stainless steel pressure vessel |
-
2007
- 2007-03-16 CN CN 200710061597 patent/CN101032780A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101947681A (en) * | 2010-09-20 | 2011-01-19 | 浙江诚信医化设备有限公司 | Welding technology of stainless steel measuring tank |
| CN102451946A (en) * | 2010-10-25 | 2012-05-16 | 宝山钢铁股份有限公司 | Stable welding method for argon arc welding of high-silicon-content silicon steel |
| CN102451946B (en) * | 2010-10-25 | 2013-07-17 | 宝山钢铁股份有限公司 | Stable welding method for argon arc welding of high-silicon-content silicon steel |
| CN103648708B (en) * | 2011-07-06 | 2016-03-09 | 新日铁住金株式会社 | Austenitic steel welding point |
| CN103648708A (en) * | 2011-07-06 | 2014-03-19 | 新日铁住金株式会社 | Austenite steel welded joint |
| US9211601B2 (en) | 2011-07-06 | 2015-12-15 | Nippon Steel & Sumitomo Metal Corporation | Austenitic steel welded joint |
| CN102554403A (en) * | 2012-02-02 | 2012-07-11 | 蓬莱中柏京鲁船业有限公司 | Method for preparing stainless steel jointed board for shipbuilding |
| CN102554403B (en) * | 2012-02-02 | 2015-06-03 | 蓬莱中柏京鲁船业有限公司 | Method for preparing stainless steel jointed board for shipbuilding |
| CN102676063A (en) * | 2012-04-26 | 2012-09-19 | 武汉铁锚焊接材料股份有限公司 | Method and special polishing liquid for reworking and repairing solid welding wires |
| CN102676063B (en) * | 2012-04-26 | 2014-03-19 | 武汉铁锚焊接材料股份有限公司 | Method and special polishing liquid for reworking and repairing solid welding wires |
| CN104889544A (en) * | 2015-05-19 | 2015-09-09 | 沈阳富创精密设备有限公司 | Stainless steel cavity preheating transmission cavity welding process |
| CN109128453A (en) * | 2018-08-24 | 2019-01-04 | 沈阳富创精密设备有限公司 | A kind of device monitored in real time and control welding deformation |
| CN111203611A (en) * | 2020-01-16 | 2020-05-29 | 中国航发长江动力有限公司 | Welding method and welding part of multilayer thin-wall metal material |
| CN111570559A (en) * | 2020-05-18 | 2020-08-25 | 中国石油天然气集团有限公司 | Low-carbon high-strength austenitic stainless steel continuous tube and preparation method thereof |
| CN114160930A (en) * | 2021-12-27 | 2022-03-11 | 西安西材三川智能制造有限公司 | Molybdenum-lanthanum alloy pipeline argon arc welding process |
| CN114871533A (en) * | 2022-04-22 | 2022-08-09 | 中船澄西(泰州)装备科技有限公司 | Welding test method for S30408 austenitic stainless steel pressure vessel |
| CN114871533B (en) * | 2022-04-22 | 2023-08-29 | 中船澄西(泰州)装备科技有限公司 | Welding test method of S30508 austenitic stainless steel pressure vessel |
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