CN110935988A - Stainless steel tube plate welding method for laying welding material - Google Patents
Stainless steel tube plate welding method for laying welding material Download PDFInfo
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- CN110935988A CN110935988A CN201911173086.7A CN201911173086A CN110935988A CN 110935988 A CN110935988 A CN 110935988A CN 201911173086 A CN201911173086 A CN 201911173086A CN 110935988 A CN110935988 A CN 110935988A
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- 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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
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- 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
- B23K9/00—Arc welding or cutting
- B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
- B23K9/133—Means for feeding electrodes, e.g. drums, rolls, motors
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Abstract
The invention discloses a welding method for stainless steel tube plates with laid welding materials. It comprises the following steps: A. selecting ER309 as a backing welding material and ER310 as a surface welding material; B. step-by-step welding: a. processing an annular groove on the welding surface of the welding part, performing first backing welding in the annular groove, adopting attenuation current in an arc pit and lagging wire feeding, and stopping wire feeding before attenuation is finished; b. and performing the second welding procedure, adopting the attenuation current in the arc pit and carrying out delayed wire feeding, and stopping wire feeding before the attenuation is finished. Has the advantages that: the arc crater is optimized in the welding process, a reasonable ending process is adopted, the problem of weld cracking is effectively avoided, the welding quality is greatly improved, two layers of welding materials with different properties are utilized, the welding strength is greatly improved, the problem that the root welding cracks and incomplete penetration are well solved by matching with a new process is solved, and the qualified rate of the root penetration is greatly improved.
Description
Technical Field
The invention relates to a welding method of 310S stainless steel, in particular to a welding method of stainless steel tube plates for laying welding materials.
Background
310S belongs to heat-resistant austenitic stainless steel, has good high temperature resistance, has wide application in the sulfuric acid industry, is easy to generate welding hot cracks when being welded on the stainless steel, and the crystallization cracks of one type of the hot cracks are often generated in welding seams, particularly easily generated at the ending parts and arc pits of the welding seams, for example, the crystallization cracks are very easy to generate in the welding process of inner tube plates of a tank container, and the reasons for generating the cracks are as follows:
(1) influence of metallurgical factors: the metallurgical factors of the crystal cracks are mainly the type, chemical composition and crystal structure form of the alloy state diagram, and the tendency of the crystal cracks is increased along with the increase of the crystallization temperature interval of the alloy state diagram.
(2) The influence of alloy elements is that the influence of alloy elements on the generation of crystal cracks is very complex but very important and is one of the most essential factors for influencing the cracks, the mutual influence of a plurality of alloy elements is usually more complex than that of a single element, such as sulfur and phosphorus in carbon steel and low alloy steel, the tendency of crystal cracks is increased by sulfur and phosphorus, even if trace elements exist, the crystallization interval is greatly increased, carbon elements in steel are main elements for influencing the crystal cracks and can intensify the harmful effects of other elements, such as sulfur, phosphorus and the like, Ni elements expand a gamma phase region to form an infinite solid solution, the maximum solubility in α iron is about 7 percent, carbides are not formed, the effects of solid solution strengthening and improving hardenability and the like, iron tree crystal grains can be refined, the shaping and toughness of the steel, particularly the low-temperature toughness of the steel are improved for main austenite forming elements and the corrosion resistance of the steel, and the corrosion resistance of the steel is improved by being combined with chromium, molybdenum and the like under the same condition of strength and the austenite acid-resistant stainless steel.
(3) The metal crystallized first in the crystallization process of the welding seam is pure, the metal crystallized later has more impurities and is enriched in a crystal boundary, the crystal formed by the impurities has a lower melting point, the eutectic with the low melting point is extruded at the intersection center position of the columnar crystals to form a liquid film, and the liquid film is subjected to tensile stress due to shrinkage, so that the liquid film can be cracked in the weak area under the action of the tensile stress to form crystal cracks, and the crystal cracks are cracked along the length direction of the center of the welding seam in the most common situation.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a stainless steel tube plate welding method for laying welding materials, which can reduce cracking and improve welding quality.
In order to solve the technical problem, the method for welding the stainless steel tube plate with the welding material comprises the following steps:
A. selecting a material to be welded, selecting ER309 as a bottoming welding material, and selecting ER310 as a surface welding material;
B. step-by-step welding:
a. processing an annular groove on the welding surface of a welding part, performing first backing welding in the annular groove by using ER309 welding materials and adopting tungsten electrode gas shielded welding, wherein in the welding process, welding current of 130-134A and wire feeding speed of 50-80cm/min are adopted, meanwhile, in the welding process, attenuation current of 3-7S is adopted in an arc pit and wire feeding is delayed, and wire feeding is stopped 1-3S before attenuation is finished, so that the welding operation of a first welding process is completed;
b. after the first welding process is finished, the welding material of ER310 is used for welding in the second process by adopting the welding current of 132-.
When the second welding procedure is carried out, the inter-channel temperature between the second welding procedure and the first welding procedure is kept to be less than or equal to 100 ℃.
In the first welding procedure, the diameter of the electric arc is 2-4mm, and root penetration is guaranteed.
The arcing position in the second welding procedure is 40-50 degrees staggered from the arcing position in the first welding procedure.
And after the welding operation of the first welding procedure is finished, polishing once by using a phi 1-3 grinding head, and then performing the welding operation of the second welding procedure.
And carrying out nondestructive testing after the second welding procedure is completed.
The invention has the advantages that:
by adopting ER309 as the backing welding material, adopting ER310 as the surface welding material, utilize gas shielded tungsten welding to weld the weldment in two processes, adopt the welding current that is fit for the technological demand and send a technology to control the welding process among the welding process, make the crater obtain the optimization treatment and adopt reasonable ending technology among the welding process from this, the welding seam fracture problem has effectively been avoided, welding quality has greatly been improved, especially, utilize two-layer welding material of different performance, welding strength has greatly been improved and cooperate the fine condition of solving root welding crackle and not having the penetration of welding of new technology, make the qualification rate of root penetration of welding obtain promoting by a wide margin.
Drawings
FIG. 1 is a gold phase diagram of a third embodiment of the present invention.
Detailed Description
The welding part of the invention is preferably the welding between the tube plate and the tube, and an automatic welding operation mode is adopted in the welding process, and the welding method of the stainless steel tube plate for laying the welding material of the invention is further described in detail with the specific embodiment.
The first embodiment is as follows:
the method for welding stainless steel tube plates with welding materials comprises the following steps:
A. selecting materials to be welded, selecting ER309, phi 0.9 and standard SFA-5.9 as backing welding materials, and selecting ER310, phi 0.9 and standard SFA-5.9 as surface welding materials;
B. step-by-step welding:
a. processing an annular groove on a welding surface of a welding part, performing first backing welding in the annular groove by using ER309 welding materials and adopting Gas Tungsten Arc Welding (GTAW), wherein the welding position can be selected to be 5G anticlockwise (the pipe shaft is horizontal), adopting 130A welding current and 50cm/min wire feeding speed in the welding process, and meanwhile, adopting 3s attenuation current in an arc pit and lagging wire feeding in the welding process, wherein the diameter of a welding arc is 2mm, and root penetration is ensured; stopping feeding the wire 1S before the attenuation is finished, completing the welding operation of the first welding procedure, polishing the wire by using a grinding head with the diameter of 1mm after the welding operation of the first welding procedure is completed, and then performing the welding operation of the second welding procedure;
b. after the first welding procedure is finished, when the second procedure is carried out, the inter-procedure temperature of the first welding procedure is kept to be less than or equal to 60 ℃, the arc starting position in the second welding procedure is staggered with the arc starting position in the first welding procedure by 40 degrees, the ER310 welding material is utilized to carry out the second procedure welding by adopting the tungsten electrode gas shielded welding, the welding current of 132A and the wire feeding speed of 120cm/min, in the welding process, the attenuation current of 3S is adopted in an arc pit and the wire feeding is delayed, and the wire feeding is stopped 1S before the attenuation is finished.
And carrying out nondestructive testing after the second welding procedure is completed.
Example two:
the method for welding stainless steel tube plates with welding materials comprises the following steps:
A. selecting a material to be welded, selecting ER309 as a bottoming welding material, and selecting ER310 as a surface welding material;
B. step-by-step welding:
a. processing an annular groove on the welding surface of a welding part, performing first backing welding by using ER309 welding materials in the annular groove and adopting tungsten electrode gas shielded welding, wherein the content of S and P is ultralow, in the welding process, 134A welding current and a wire feeding speed of 80cm/min are adopted, meanwhile, in the welding process, 7S attenuation current is adopted in an arc pit and the wire feeding is delayed, in the welding process, the diameter of a welding arc is 4mm, and the root penetration is ensured; 3S, stopping feeding the wire 3S before the attenuation is finished, completing the welding operation of the first welding procedure, and after the welding operation of the first welding procedure is completed, polishing by using a grinding head with the diameter of 3mm and then performing the welding operation of the second welding procedure;
b. after the first welding procedure is finished, when the second procedure is carried out, the temperature between the welding procedure and the first welding procedure is kept to be less than or equal to 100 ℃, the arc starting position in the second welding procedure is staggered from the arc starting position in the first welding procedure by 50 degrees, the ER310 welding material is utilized to carry out the second procedure welding by adopting the tungsten electrode gas shielded welding, the welding current of 136A and the wire feeding speed of 150cm/min, in the welding process, the attenuation current of 7S is adopted in an arc pit and the wire feeding is delayed, in the welding process, the diameter of the welded arc is 2mm, and the wire feeding is stopped 3S before the attenuation is finished.
And carrying out nondestructive testing after the second welding procedure is completed.
Example three:
the method for welding stainless steel tube plates with welding materials comprises the following steps:
A. selecting a material to be welded, selecting ER309 as a bottoming welding material, and selecting ER310 as a surface welding material;
B. step-by-step welding:
a. the welding surface of a welding part is processed with an annular groove, ER309 welding materials are utilized in the annular groove to carry out first backing welding by adopting gas shielded tungsten arc welding, a phi 2.4mm WC20 cerium tungsten electrode is adopted, and preheating is carried out before welding: the minimum preheating temperature is more than or equal to 5 ℃, in the welding process, the welding current of 132A and the wire feeding speed of 50cm/min are adopted, the welding current DCEN (direct current connection) is adopted, and the pulse current is carried, so that the surface of a welding seam is ensured to be slightly convex or flat and not to be concave; meanwhile, in the welding process, 5s of attenuation current is adopted in an arc pit and the wire feeding is delayed, in the welding process, the diameter of a welding arc is 3mm, and the energy of an arc wire with pulses is properly melted, preset and filled, so that root penetration is ensured; stopping feeding the wire 1.5S before the attenuation is finished, completing the welding operation of the first welding procedure, polishing once by using a grinding head with the diameter of phi 3mm after the welding operation of the first welding procedure is completed, and then performing the welding operation of the second welding procedure;
b. after the first welding procedure is finished, when the second procedure is carried out, the inter-procedure temperature of the first welding procedure is kept to be less than or equal to 80 ℃, the arc starting position in the second welding procedure is staggered from the arc starting position in the first welding procedure by 45 degrees, the ER310 welding material is utilized to carry out the second procedure welding by adopting the tungsten electrode gas shielded welding, adopting the welding current of 133A and the wire feeding speed of 123cm/min, in the welding process, adopting the attenuation current of 5S in an arc pit and lagging the wire feeding, and stopping the wire feeding 1.5S before the attenuation is finished.
And carrying out nondestructive testing NDE after the second welding procedure is completed, wherein the flaw detection of the pipe-plate joint of the pipe requires 100% PT to detect I-grade to be qualified.
In this example, the tube sheet automatic welding parameter table (as follows)
The data of the third embodiment are detected, and the figure shows that the quality is obviously improved, the qualification rate of root penetration is improved to 98 percent from the original 85 percent, and the effect is obvious.
Claims (6)
1. A welding method for stainless steel tube plates with welding materials comprises the following steps:
A. selecting a material to be welded, selecting ER309 as a bottoming welding material, and selecting ER310 as a surface welding material;
B. step-by-step welding:
a. processing an annular groove on the welding surface of a welding part, performing first backing welding in the annular groove by using ER309 welding materials and adopting tungsten electrode gas shielded welding, wherein in the welding process, welding current of 130-134A and wire feeding speed of 50-80cm/min are adopted, meanwhile, in the welding process, attenuation current of 3-7S is adopted in an arc pit and wire feeding is delayed, and wire feeding is stopped 1-3S before attenuation is finished, so that the welding operation of a first welding process is completed;
b. after the first welding process is finished, the welding material of ER310 is used for welding in the second process by adopting the welding current of 132-.
2. A method of welding stainless steel tubular sheets with applied welding material as defined in claim 1, wherein: when the second welding procedure is carried out, the inter-channel temperature between the second welding procedure and the first welding procedure is kept to be less than or equal to 100 ℃.
3. A method of welding stainless steel tube sheets with applied welding material according to claim 1 or 2, wherein: in the first welding procedure, the diameter of the electric arc is 2-4mm, and root penetration is guaranteed.
4. A method of welding stainless steel tube sheets with weld material applied thereto according to claim 3, wherein: the arcing position in the second welding procedure is 40-50 degrees staggered from the arcing position in the first welding procedure.
5. A method of welding stainless steel tube sheets with applied welding material as claimed in claim 1, 2 or 4, wherein: and after the welding operation of the first welding procedure is finished, polishing once by using a phi 1-3 grinding head, and then performing the welding operation of the second welding procedure.
6. A method of welding stainless steel tubular sheets with applied welding material according to claim 5, wherein: and carrying out nondestructive testing after the second welding procedure is completed.
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| CN201911173086.7A CN110935988A (en) | 2019-11-26 | 2019-11-26 | Stainless steel tube plate welding method for laying welding material |
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Citations (9)
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|---|---|---|---|---|
| JPH0481274A (en) * | 1990-07-24 | 1992-03-13 | Kobe Steel Ltd | Production of magnetic shielding parts of electromagnetic clutch |
| CN101633074A (en) * | 2009-07-16 | 2010-01-27 | 西安交通大学 | Welding method of girth weld of inner cladding thin-walled stainless steel composite tube |
| CN102717175A (en) * | 2012-06-20 | 2012-10-10 | 东方电气集团东方锅炉股份有限公司 | Automatic argon arc seal welding method for narrow gap between deep grooves of tube plate and heat exchange tube |
| WO2013165247A1 (en) * | 2012-05-03 | 2013-11-07 | Stamicarbon B.V. | Method for manufacturing a tube sheet and heat exchanger assembly for a pool reactor or pool condenser |
| CN104972211A (en) * | 2015-06-29 | 2015-10-14 | 柳州金茂机械有限公司 | Stainless steel pipe plate welding joint process |
| CN106001859A (en) * | 2016-06-03 | 2016-10-12 | 江苏科技大学 | Field horizontal welding method for duplex stainless steel |
| CN108746940A (en) * | 2018-05-31 | 2018-11-06 | 洛阳隆华传热节能股份有限公司 | A method of it reducing nickel-base alloy tube sheet automatic welding and receives burst check line |
| CN109108435A (en) * | 2018-10-15 | 2019-01-01 | 中船澄西船舶修造有限公司 | A kind of stainless steel light wall pipe cold metal transfer welding procedure |
| CN109530883A (en) * | 2018-11-16 | 2019-03-29 | 上海盛剑环境***科技股份有限公司 | A kind of stainless steel 310S welding procedure |
-
2019
- 2019-11-26 CN CN201911173086.7A patent/CN110935988A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0481274A (en) * | 1990-07-24 | 1992-03-13 | Kobe Steel Ltd | Production of magnetic shielding parts of electromagnetic clutch |
| CN101633074A (en) * | 2009-07-16 | 2010-01-27 | 西安交通大学 | Welding method of girth weld of inner cladding thin-walled stainless steel composite tube |
| WO2013165247A1 (en) * | 2012-05-03 | 2013-11-07 | Stamicarbon B.V. | Method for manufacturing a tube sheet and heat exchanger assembly for a pool reactor or pool condenser |
| CN102717175A (en) * | 2012-06-20 | 2012-10-10 | 东方电气集团东方锅炉股份有限公司 | Automatic argon arc seal welding method for narrow gap between deep grooves of tube plate and heat exchange tube |
| CN104972211A (en) * | 2015-06-29 | 2015-10-14 | 柳州金茂机械有限公司 | Stainless steel pipe plate welding joint process |
| CN106001859A (en) * | 2016-06-03 | 2016-10-12 | 江苏科技大学 | Field horizontal welding method for duplex stainless steel |
| CN108746940A (en) * | 2018-05-31 | 2018-11-06 | 洛阳隆华传热节能股份有限公司 | A method of it reducing nickel-base alloy tube sheet automatic welding and receives burst check line |
| CN109108435A (en) * | 2018-10-15 | 2019-01-01 | 中船澄西船舶修造有限公司 | A kind of stainless steel light wall pipe cold metal transfer welding procedure |
| CN109530883A (en) * | 2018-11-16 | 2019-03-29 | 上海盛剑环境***科技股份有限公司 | A kind of stainless steel 310S welding procedure |
Non-Patent Citations (1)
| Title |
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| 邱言龙，聂正斌，雷振国, 上海科学技术出版社 * |
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