CN101474712A - Biphase steel SA-240 S31803 manual arc welding (SMAW) welding process - Google Patents
Biphase steel SA-240 S31803 manual arc welding (SMAW) welding process Download PDFInfo
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- CN101474712A CN101474712A CNA2008100322156A CN200810032215A CN101474712A CN 101474712 A CN101474712 A CN 101474712A CN A2008100322156 A CNA2008100322156 A CN A2008100322156A CN 200810032215 A CN200810032215 A CN 200810032215A CN 101474712 A CN101474712 A CN 101474712A
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Abstract
The invention relates to a shielded metal arc welding (SMAW) welding procedure for dual phase steel SA-240 S31803. The invention is characterized in that the welding procedure comprises the following steps: a mechanical method is adopted to dig a groove of 30-35 degrees on a welding surface; water, oil stain, iron rust and welding sticks on the groove surface and two extending sides thereof are eliminated, the selected welding machine is a controlled silicon rectifier arc welding machine, and an E2209 welding rod is selected. The arrangement of welding lines includes: a first welding line is arranged at a blunt edge at the bottom of the groove, then a second welding line, a third welding line, a fourth welding line and a fifth welding line which are staggered from the left to the right are arranged, a six welding line is welded at the opposite side of the first welding line, and back chipping is carried out by a grinding wheel specially used for stainless steel before welding, a brand-new grinding wheel is preferred. Heat input in welding is 0.5-2.5KJ/mm, interlayer temperature is less than or equal to 150 DEG C, the thickness of the welding line in each layer is less than or equal to 2.5mm, and the welding rod is required to be dried at the temperature of 250 DEG C and put in a welding rod heat-preserving container for use. The welding procedure of the invention has the advantages that ferrite content in the welding line is ensured to be 35-60%, thus not destroying corrosion resistance and chemical compositions of the dual phase steel.
Description
Technical field
The present invention relates to a kind of welding procedure of dual phase steel, particularly a kind of dual phase steel SA-240 S31803 manual electric arc welding (SMAW) welding procedure.
Background technology
Austenite-ferritic stainless steel is commonly referred to as dual phase steel, and it has the chromium of high-load, simultaneously a certain amount of nickel, molybdenum is arranged again, and the good burn into of anti-chloride stress cracking pitting and crevice corrosion behavior are arranged.Dual phase steel also has very high tensile strength and wear-resisting invulnerability energy, and therefore dual phase steel is widely used in container, the structural member of high corrosive medium, chemical solvent holding tank, the tankage on the coastal waters, and marine chemical tanker.Because dual phase steel application at home is fewer, the use buying of dual phase steel is difficulty relatively, therefore the welding procedure for dual phase steel is in the junior stage, there is not ripe technology can instruct production, the production of dual phase steel product is met difficulty, product quality is difficult to guarantee, therefore demands exploitation urgently and relatively is suitable for the dual phase steel soldering process.
Summary of the invention
The objective of the invention is to solve in the prior art the existing problem of no maturation process in welding, a kind of dual phase steel SA-240 S31803 manual electric arc welding (SMAW) welding procedure is provided dual phase steel.The present invention designs dual phase steel SA-240 S31803 manual electric arc welding (SMAW) welding procedure, it is characterized in that comprising the following steps: on solder side, digging 30 °+5 ° groove with mechanical means, stretch place's removing water, greasy dirt, iron rust at groove face and two edges, welding wire, welding machine is the silicon controlled rectifier arc-welding machine, selects the welding of E2209 welding rod for use.The E2209 welding rod of selecting for use is diameter 3.2mm and 4.0mm, at the E2209 welding rod of root face place backing welding employing diameter 3.2mm, adopts the E2209 welding rod of diameter 4.0mm subsequently.Weld seam is arranged as the root face place that first road is positioned at the groove bottom, up be two roads then, three roads, pitch about four roads, five roads, carry out the welding of the 6th road weld seam at the reverse side in first road, carry out the back chipping processing with being exclusively used in stainless emery wheel before the weldering, preferably adopt brand-new original grinding wheel.Hot input quantity during welding is 0.5---2.5KJ/mm, and interlayer temperature is smaller or equal to 150 ℃, and the thickness of every layer of weld seam is smaller or equal to 2.5mm, and welding rod need be with 250 ℃ of oven dry, and leave in the welding rod heat-preserving container standby.Advantage of the present invention is to guarantee that ferrite content is 35% in the weld seam---between 60%, can not destroy the resistance to corrosion and the chemical analysis of dual phase steel.
Below in conjunction with example the present invention is elaborated.
Description of drawings
Accompanying drawing 1 is the divided edge structure schematic diagram of machining of the present invention,
Accompanying drawing 2 is that weld seam of the present invention is arranged schematic diagram,
The specific embodiment
At first the dual phase sheet steel of two desire welding is dug 30 °+5 ° groove on solder side separately with mechanical means; groove can stay the root face of 1mm; stretch place's removing water, greasy dirt, iron rust at groove face and two edges; welding wire; can be along removing in the scope of 20mm of stretching the place; welding machine is the silicon controlled rectifier arc-welding machine, use be the ZX5-400 type silicon controlled rectifier arc-welding machine of Shanghai Hu Nan welding equipment limited company, select E2209 welding rod welding for use.The E2209 welding rod of selecting for use is the E2209-17 welding rod of AVESTA company, with 250 ℃ of oven dry, and leaves in the incubator standby welding rod.At first the welding rod with diameter 3.2mm carries out the spot welding location, spot welding length is 5---between the 10mm, spacing 50---70mm, subsequently at root face place backing welding, adopt the welding rod of diameter 3.2mm, adopt the E2209 welding rod of diameter 4.0mm to weld according to this subsequently, weld seam is arranged as the root face place that first road is positioned at the groove bottom, up be two roads then, three roads are pitched about four roads, five roads, carry out the welding of the 6th road weld seam at the reverse side in first road, carry out the back chipping processing with being exclusively used in stainless emery wheel before the weldering, preferably adopt brand-new original grinding wheel.Hot input quantity during welding is 0.5---2.5KJ/mm, and interlayer temperature is smaller or equal to 150 ℃, and the thickness of every layer of weld seam is smaller or equal to 2.5mm.
After the weld seam welding finishes, can polish with being exclusively used in stainless emery wheel, preferably adopt brand-new original grinding wheel.
Following table is for adopting weld seam experimental performance of the present invention
Tensile strength (Mpa) is 813, angle of bend (°) be 180, impact value (50 ℃) (J/cm
2) Wei ≧ 50, (HB) Wei ≦ 250, (GB/T 4334.5: stainless steel sulfuric acid-copper sulphate corrosion test method) qualified, ferrite content (%) is 52.3 to hardness in intercrystalline corrosion.
Claims (4)
1, dual phase steel SA-240 S31803 manual electric arc welding (SMAW) welding procedure, it is characterized in that comprising the following steps: on solder side, digging 30 °+5 ° groove with mechanical means, stretch place's removing water, greasy dirt, iron rust at groove face and two edges, welding wire, welding machine is the silicon controlled rectifier arc-welding machine, selects the welding of E2209 welding rod for use.
2, by the described dual phase steel SA-240 of claim 1 S31803 manual electric arc welding (SMAW) welding procedure, it is characterized in that: the E2209 welding rod of selecting for use is diameter 3.2mm and 4.0mm, at the E2209 welding rod of root face place backing welding employing diameter 3.2mm, adopt the E2209 welding rod of diameter 4.0mm subsequently.
3, by the described dual phase steel SA-240 of claim 1 S31803 manual electric arc welding (SMAW) welding procedure, it is characterized in that: weld seam is arranged as first road and is positioned at the low root face place of groove, up be two roads then, three roads, pitch about four roads, five roads, carry out the welding of the 6th road weld seam at the reverse side in first road.
4, by the described dual phase steel SA-240 of claim 1 S31803 manual electric arc welding (SMAW) welding procedure, it is characterized in that: the hot input quantity during welding is 0.5---2.5KJ/mm, interlayer temperature is smaller or equal to 150 ℃, the thickness of every layer of weld seam is smaller or equal to 2.5mm, welding rod need be with 250 ℃ of oven dry, and leave in the welding rod heat-preserving container standby.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100322156A CN101474712A (en) | 2008-01-02 | 2008-01-02 | Biphase steel SA-240 S31803 manual arc welding (SMAW) welding process |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008100322156A CN101474712A (en) | 2008-01-02 | 2008-01-02 | Biphase steel SA-240 S31803 manual arc welding (SMAW) welding process |
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| CN101474712A true CN101474712A (en) | 2009-07-08 |
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| CNA2008100322156A Pending CN101474712A (en) | 2008-01-02 | 2008-01-02 | Biphase steel SA-240 S31803 manual arc welding (SMAW) welding process |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102922097A (en) * | 2012-10-25 | 2013-02-13 | 国家电网公司 | Welding process of stainless steel control box |
| CN104439656A (en) * | 2014-11-14 | 2015-03-25 | 句容五星机械制造有限公司 | Manual electrical arc welding process for agitator blade |
| CN106180992A (en) * | 2016-08-30 | 2016-12-07 | 沈阳三科水力机械制造有限公司 | Two phase stainless steel repair welding of casting technique |
| CN109175751A (en) * | 2018-08-31 | 2019-01-11 | 江苏师范大学 | A kind of welding and post welding heat treatment method of two-phase high-strength steel |
-
2008
- 2008-01-02 CN CNA2008100322156A patent/CN101474712A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102922097A (en) * | 2012-10-25 | 2013-02-13 | 国家电网公司 | Welding process of stainless steel control box |
| CN102922097B (en) * | 2012-10-25 | 2015-08-19 | 国家电网公司 | A kind of welding procedure of stainless steel control box |
| CN104439656A (en) * | 2014-11-14 | 2015-03-25 | 句容五星机械制造有限公司 | Manual electrical arc welding process for agitator blade |
| CN106180992A (en) * | 2016-08-30 | 2016-12-07 | 沈阳三科水力机械制造有限公司 | Two phase stainless steel repair welding of casting technique |
| CN109175751A (en) * | 2018-08-31 | 2019-01-11 | 江苏师范大学 | A kind of welding and post welding heat treatment method of two-phase high-strength steel |
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Application publication date: 20090708 |