CN102615404B - Method for synchronously welding two surfaces of stainless steel thick plate - Google Patents
Method for synchronously welding two surfaces of stainless steel thick plate Download PDFInfo
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- CN102615404B CN102615404B CN201210112485.4A CN201210112485A CN102615404B CN 102615404 B CN102615404 B CN 102615404B CN 201210112485 A CN201210112485 A CN 201210112485A CN 102615404 B CN102615404 B CN 102615404B
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Abstract
The invention discloses a method for synchronously welding two surfaces of a stainless steel thick plate, which is mainly used for welded connection of stainless thick plate equipment in the industries of metallurgy, chemical engineering and the like. The method mainly comprises the following steps of: synchronously welding the same welding seam from two surfaces by adopting a filament argon arc welding method under the condition of the same welding equipment, environment and welding condition to ensure that the welding seam is qualified by one step; and forming a method for synchronously welding the two surfaces of the stainless steel thick plate through filament argon arc welding to ensure that the welding seam is qualified by one step. The method has the advantages that: the same welding seam is welded from two surfaces synchronously, the contraction percentages of the two surfaces are the same, leakage points cannot be generated, and the welding seam can be qualified by one step, so that the method is particularly suitable for welding pressure containers.
Description
Technical field
The present invention relates to a kind of stainless steel thick plate welding method, be mainly used in the welding of the stainless steel thick plate equipment of the industry thickness 25.0-100 millimeters such as metallurgy, chemical industry; Do not comprise that thickness is less than the thick corrosion resistant plate of spy that the stainless sheet steel of 25 millimeters and thickness are greater than 100 millimeters.
Background technology
In industries such as metallurgy, chemical industry, due to corrosion resistant needs, often adopting thickness is that the corrosion resistant plate of 25-100 millimeter is manufactured equipment, in installation, need to weld stainless steel.Current welding method is from one side welding, or first welding one side is again from another side butt welding.Stainless steel thick plate welding is different from general steel plate, because of thickness of slab, while welding from one side, can be easy to produce breakthrough because the shrinkage factor on two sides is different, and for pressure vessel, this is definitely unallowed.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of stainless steel thick plate Double-side Synchronous welding method.
The present invention realizes with following technical scheme: stainless steel thick plate Double-side Synchronous welding method, adopt the welding method of filament argon arc welding, in the situation that welding equipment, environment and welding condition are identical, same weld seam is synchronously welded from two sides simultaneously, make weld seam once qualified; Form stainless steel thick plate filament argon arc welding Double-side Synchronous welding method; Described welding condition comprises:
(1) thickness of stainless steel thick plate member is 25-100 millimeter, opens V-butt, fit-up gap 1-3mm on the joint two sides of stainless steel thick plate member; The employing of joint end face is machined into smooth smooth, greasy dirt and moisture within the scope of preweld cleaning joint end face 3-5 millimeter, and dry;
(2) adopt the welding of filament argon arc welding Double-side Synchronous welding method; Described welding condition is: stainless steel thick plate member erect, stayed fit-up gap, and fixing, select welding wire; Along the bottom-up welding of weld seam,
(3) postwelding inspection trimming.
The invention has the beneficial effects as follows: same weld seam is synchronously welded from two sides simultaneously, and two sides shrinkage factor is identical, can not produce breakthrough, can guarantee that weld seam is once qualified, is specially adapted to the welding of pressure vessel.
The specific embodiment
Embodiment 1,
The air separation column construction of the large oxygen station engineering of a domestic steel mill, air separation column is made by the corrosion resistant plate of 25mm.
Welding equipment is all market purchasing, and corollary equipment comprises: the source of welding current, welding machine, wire reel, control device, cable machinery etc.
(1) source of welding current is CR-H800 type direct current flat characteristic power supply 1 cover; Input voltage: 3 phases, 380 volts, 50/Hz; Specified input capacity: 60kVA; Output-current rating: 800A; Output voltage range: 24-42V; Floating voltage 75V; Rated duty cycle: 100%, output adopts SCR control mode;
(2) welding machine has TM-90-7.2 type riser 1 cover, WF-100-6.5 type wire feeder 1 cover, suspending rod 1 cover and T825 type welding electrode 1 cover; Rising motor is direct current 90W electromagnetic motor, the rate of climb: 12-120 mm/min, and the rate of climb is carried out the variable control of constant speed with controllable silicon; Wire feed motor is direct current 100W electromagnetic motor, and wire feed rate is also carried out the variable control of constant speed with controllable silicon; Ignition tip position adjustment range is front and back ± 15 millimeter and left and right ± 10 millimeter;
(3) wire reel pushes away a machine 1 cover by WR-75P type wire reel 1 cover and WF-50-10 type and forms; Wire feed rate 0-10 m/min, wire feed motor is direct current 50W electromagnetic motor, wire feed is controlled and is adopted the output of determining of series resistance to control;
(4) control device is comprised of control cabinet 1 cover, relay and control case 1 cover and control box 1 cover;
(5) cable comprises welding with electro-insulating rubber cable 1 cover and controls with cable 1 cover;
Concrete welding method: vertical position welding welding, welding point adopts two-sided double V-groove, fit-up gap is 3 millimeters, and bevel angle is 45 °, the two sides by the suitable welder of two weld horizontal at soldered equipment, adopt the welding method of identical filament argon arc welding, by identical speed of welding to the welding simultaneously of same weld seam, 5 millimeters of gage of wires, welding current is 600A, weldingvoltage is 40V, and speed of welding is 15 mm/min.
Postwelding detects, ne-leakage point, an acceptance(check) of weld seam.
Claims (1)
1. a stainless steel thick plate Double-side Synchronous welding method, it is characterized in that: the thickness of stainless steel thick plate member is 25 millimeters, adopt the welding method of filament argon arc welding, in the situation that welding equipment, environment and welding condition are identical, same weld seam is synchronously welded from two sides simultaneously, make weld seam once qualified; Described welding equipment comprises: the source of welding current, welding machine, wire reel, control device, cable machinery;
(1) source of welding current is CR-H800 type direct current flat characteristic power supply 1 cover; Input voltage: 3 phases, 380 volts, 50Hz; Specified input capacity: 60kVA; Output-current rating: 800A; Output voltage range: 24-42V; Floating voltage 75V; Rated duty cycle: 100%, output adopts SCR control mode;
(2) welding machine has TM-90-7.2 type riser 1 cover, WF-100-6.5 type wire feeder 1 cover, suspending rod 1 cover and T825 type welding electrode 1 cover; Rising motor is direct current 90W electromagnetic motor, the rate of climb: 12-120 mm/min, and the rate of climb is carried out the variable control of constant speed with controllable silicon; Wire feed motor is direct current 100W electromagnetic motor, and wire feed rate is also carried out the variable control of constant speed with controllable silicon; Ignition tip position adjustment range is front and back ± 15 millimeter and left and right ± 10 millimeter;
(3) wire reel pushes away a machine 1 cover by WR-75P type wire reel 1 cover and WF-50-10 type and forms; Wire feed rate 0-10 m/min, wire feed motor is direct current 50W electromagnetic motor, wire feed is controlled and is adopted the output of determining of series resistance to control;
(4) control device is comprised of control cabinet 1 cover, relay and control case 1 cover and control box 1 cover;
(5) cable comprises welding with electro-insulating rubber cable 1 cover and controls with cable 1 cover;
Concrete welding method: vertical position welding welding, be about to stainless steel thick plate member and erect, stayed fit-up gap, fixing, select welding wire; Along the bottom-up welding of weld seam, welding point adopts two-sided double V-groove, fit-up gap is 3 millimeters, and bevel angle is 45 °, the two sides by the suitable welder of two weld horizontal at soldered equipment, adopt the welding method of identical filament argon arc welding, by identical speed of welding to the welding simultaneously of same weld seam, 5 millimeters of gage of wires, welding current is 600A, weldingvoltage is 40V, and speed of welding is 15 mm/min;
Postwelding detects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210112485.4A CN102615404B (en) | 2012-04-17 | 2012-04-17 | Method for synchronously welding two surfaces of stainless steel thick plate |
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| CN201210112485.4A CN102615404B (en) | 2012-04-17 | 2012-04-17 | Method for synchronously welding two surfaces of stainless steel thick plate |
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| CN102615404A CN102615404A (en) | 2012-08-01 |
| CN102615404B true CN102615404B (en) | 2014-01-22 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102896396A (en) * | 2012-10-16 | 2013-01-30 | 浙江精工钢结构有限公司 | Double-side double-arc single-pool synchronous same-direction welding forming method and groove type |
| KR101638758B1 (en) * | 2013-02-06 | 2016-07-11 | 신닛테츠스미킨 카부시키카이샤 | Multi-electrode electrogas arc welding method for thick steel plates and multi-electrode electrogas arc circumferential welding method for steel pipes |
| CN106180963A (en) * | 2015-04-30 | 2016-12-07 | 江南造船(集团)有限责任公司 | A kind of two-sided pair of GMAW welding method |
| CN106425037A (en) * | 2016-10-13 | 2017-02-22 | 广西大学 | Welding method for special steel sheets for heat exchanger |
| CN106825872B (en) * | 2017-03-08 | 2020-03-17 | 武汉天高熔接股份有限公司 | Synchronous full penetration welding process for front and back surfaces of metal component |
| CN112276387A (en) * | 2020-09-03 | 2021-01-29 | 海洋石油工程（青岛）有限公司 | Double-side welding process method for dual-phase steel explosion-proof wall |
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Effective date of registration: 20181206 Address after: 233010 Pioneering Building 316, Huineng Small and Micro Enterprises Pioneering Center, 1750 Shengli West Road, Yuhui District, Bengbu City, Anhui Province Patentee after: Bengbu Dingrong Science and Technology Information Consulting Co., Ltd. Address before: No. 26, Xue Yuan Road, Quanshan District, Xuzhou, Jiangsu Patentee before: Jiangsu Institute of Architectural Technology |
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Effective date of registration: 20190115 Address after: No. 26, Xue Yuan Road, Quanshan District, Xuzhou, Jiangsu Patentee after: Jiangsu Institute of Architectural Technology Address before: 233010 Pioneering Building 316, Huineng Small and Micro Enterprises Pioneering Center, 1750 Shengli West Road, Yuhui District, Bengbu City, Anhui Province Patentee before: Bengbu Dingrong Science and Technology Information Consulting Co., Ltd. |