CN108890074A - A kind of S32750 super-duplex stainless steel thick plates method - Google Patents
A kind of S32750 super-duplex stainless steel thick plates method Download PDFInfo
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- CN108890074A CN108890074A CN201810743706.5A CN201810743706A CN108890074A CN 108890074 A CN108890074 A CN 108890074A CN 201810743706 A CN201810743706 A CN 201810743706A CN 108890074 A CN108890074 A CN 108890074A
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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
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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
- B23K9/235—Preliminary treatment
Abstract
The present invention relates to a kind of S32750 super-duplex stainless steel thick plates method, it include the steps that it is following successively：For I, by welding zone domain bevel, bevel angle is 65 ° ± 1 °；80 DEG C of ± 10 DEG C of preheatings are carried out to groove and its two sides 300~500mm range before II, welding, preheat 40min or more；III, implements welding using welding rod, and thermal weld stress control is welded overall process and kept the temperature to groove two sides 300~500mm range using the above thermal insulation material of thickness 50mm in 1.1 ~ 1.4kJ/mm；Interlayer temperature is 80 DEG C ± 10 DEG C in IV, welding process；V, postwelding removes thermal insulation material, air-cooled.S32750 super-duplex stainless steel thick plates method of the invention, after welding electrode arc welding welding, the austenite content of weld seam is between 40% ~ 60%.
Description
Technical field
The present invention relates to a kind of S32750 super-duplex stainless steel thick plates methods.
Background technique
S32750 super-duplex stainless steel due to Cr, Mo with higher and N content, while in room temperature texture austenite with
Ratio of ferrite is according to about 1:1 coexists, therefore has high intensity（Its yield strength is generally twice of austenitic stainless steel）, it is good
Outstanding advantages of resistance to Cl- spot corrosion well, anticorrosion stress-resistant and welding performance, in fields such as petrochemical industry, salt manufacturing, water conservancy project, shipbuildings
It is used widely.Compared with the super austenitic stainless steel 254SMO of same level, resistance to spot corrosion indices P REN is suitable, is more than
40, but the content of its Ni only has 7%, and far below the 18% of 254SMO, yield strength is about twice of 254SMO, is guaranteeing to make in this way
Under the premise of the service life, material can be further thinned, economical more significant.
When soldering diphasic stainless steel, it is preferred that emphasis is guarantee its two-phase proportion and avoid the occurrence of harmful phase.For fillable
The welding method of metal can cross the wlding of alloying by using Ni to guarantee the two-phase proportion of weld metal.Meanwhile passing through
Thermal weld stress is controlled to control the two-phase proportion of weld metal and HAZ, and avoids the precipitation of harmful phase.But slab is come
It says, since the heat dissipation of former road weld seams is very fast, then needs very high heat input.For welding electrode arc welding, this adaptability is widely welded
For connecing method, high heat input needed for being unable to reach thick plates.In consideration of it, a kind of householder method is needed, it is super to improve
Two-phase stainless steel thick plate weld seam austenite ratio.
Summary of the invention
In order to overcome the above-mentioned deficiency of existing S32750 super-duplex stainless steel thick plates method, present invention aims to mention
For a kind of S32750 super-duplex stainless steel thick plates method, this method can make super-duplex stainless steel slab in welding rod arc
After weldering welding, the austenite content of weld seam is between 40% ~ 60%.
S32750 super-duplex stainless steel of the present invention, the super PREN value for referring to two phase stainless steel are greater than 40.
PREN=Cr+1.6 × Mo+40 × N, the two-phase stainless composition of steel are as follows：
< P≤0.035% of the < Mn of the < Si of 0 < C≤0.030% 0≤0.80% 0≤1.20% 0
0 Cr of < S≤0.020%：24.00%~26.00%, Ni：6.00%~8.00%, Mo：3.00%~5.00%,
N：0.24%~0.32%, remaining is iron and inevitable impurity.
Super-duplex stainless steel of the present invention is with a thickness of 20mm or more.
This S32750 super-duplex stainless steel thick plates method include the steps that it is following successively：
I by welding zone domain bevel, bevel angle is 65 ° ± 1 °；
80 DEG C of ± 10 DEG C of preheatings are carried out to groove and its two sides 300~500mm range before II welding, preheat 40min or more；
III implements welding using welding rod, and thermal weld stress control welds overall process to groove two sides 300 in 1.1 ~ 1.4kJ/mm
~500mm range is kept the temperature using the above thermal insulation material of thickness 50mm；
Interlayer temperature is 80 DEG C ± 10 DEG C in IV welding process；
V postwelding removes thermal insulation material, air-cooled.
Above-mentioned S32750 super-duplex stainless steel thick plates method, steps characteristic are：Step III be using
2507/P100 welding rod implements welding.
Above-mentioned S32750 super-duplex stainless steel thick plates method, steps characteristic are：In step I, by welding zone domain
The groove opened is double V-groove.
Above-mentioned S32750 super-duplex stainless steel thick plates method, steps characteristic are：In step I, by welding zone domain
The groove opened is X-type groove.
Above-mentioned S32750 super-duplex stainless steel thick plates method, steps characteristic are：In step I, by welding zone domain
The groove opened is K-type groove；III welding overall process, to the two sides of the K-type groove of perpendicular S32750 super-duplex stainless steel plate
500mm ± 20mm range is kept the temperature using two pieces of above thermal insulation materials of thickness 50mm；Meanwhile flat S32750 super duplex is not
One piece of above thermal insulation material of thickness 50mm of pad is kept the temperature below rust steel plate；And upper surface K-type groove two sides 500mm ±
20mm range is kept the temperature using two pieces of above thermal insulation materials of thickness 50mm.
Beneficial effects of the present invention
The present invention is slowed down by preheating, the control to thermal weld stress, interlayer temperature of Welded Joints groove and two sides base material
Weld seam temperature fall off rate, extends ferrite in weld seam and high-temperature heat-affected zone and increases to the transformation time of austenite
Austenite ratio in weld seam and high-temperature heat-affected zone makes austenite and ferritic two-phase proportion level off to 1:1, postwelding removal
Thermal insulation material is simultaneously air-cooled, avoids the precipitation of intermetallic phase, ensure that the structure property of super-duplex stainless steel welding point.Method
It is easy to operate, it is economical and practical.
Detailed description of the invention
Fig. 1 plate banjo fixing butt jointing keeps the temperature schematic diagram
The K-type groove of Fig. 2 plate T connector keeps the temperature schematic diagram.
Fig. 3 plate double V-groove banjo fixing butt jointing keeps the temperature schematic diagram.
In above-mentioned figure
1.S32750 super-duplex stainless steel plate, 2. alumina silicate insulation blankets, 3.X type groove, 4. perpendicular S32750 super duplex are not
Become rusty steel plate, 5. side alumina silicate insulation blankets, 6.K type groove,
Alumina silicate insulation blanket on 7., 8. flat S32750 super-duplex stainless steel plates, 9. lower alumina silicate insulation blankets,
10.V mouthfuls of S32750 super-duplex stainless steel plates, 11.V type groove.
Specific embodiment
Below with reference to the specific embodiment of embodiment process in detail, but a specific embodiment of the invention not office
It is limited to following embodiments.
Embodiment one
The present embodiment welding is 40mm thickness S32750 super-duplex stainless steel steel plate, its chemical component is：
C：0.023% Si：0.55% Mn：0.95% P：0.021% S：0.001% Cr：25.23% Ni：7.04%
Mo：4.11% N：0.2547%, remaining is iron and inevitable impurity.
It is the heat preservation weldering of plate banjo fixing butt jointing, and operating procedure is as follows：Referring to Fig. 1；
I S32750 super-duplex stainless steel plate 1 is opened X-type groove 3 by welding zone domain, and bevel angle is 65 °；
The X-type groove 3 and its two sides 500mm ± 20mm range of S32750 super-duplex stainless steel plate 1 are carried out before II welding
80 DEG C of ± 10 DEG C of preheatings, preheat 45min；
III uses 2507/P100 welding rod, carries out welding electrode arc welding, weldering to the X-type groove 3 of S32750 super-duplex stainless steel plate 1
Heat input control is connect in 1.1 ~ 1.4kJ/mm；It welds overall process and four pieces of thickness is used to 3 two sides 500mm ± 20mm range of X-type groove
Degree 56mm thermal insulation material is kept the temperature；Thermal insulation material is alumina silicate insulation blanket 3；
Interlayer temperature is 80 DEG C ± 10 DEG C in IV welding process；
V postwelding removes thermal insulation material, air-cooled.
It overturns the welding S32750 super-duplex stainless steel slab of above-mentioned plate banjo fixing butt jointing, welds another side, in repetition
The step of stating I, II, III, IV and V.
After the completion of welding through above-mentioned steps, weld metal austenite phase content is 55%, balanced austenite, ferrite two
Phase Proportion improves corrosion resisting property, improves the mechanical property of welding point, its weld seam is precipitated without σ phase after measured, pitting corrosion
Rate is 2.5mdd, and the strong 910MPa of welding point tension breaks in base material.
Embodiment two
The present embodiment welding is 40mm thickness S32750 super-duplex stainless steel steel plate, its chemical component is：
C：0.023% Si：0.55% Mn：0.95% P：0.021% S：0.001% Cr：25.23% Ni：7.04%
Mo：4.11% N：0.2547%, remaining is iron and inevitable impurity.
It is the heat preservation weldering of plate T connector, and operating procedure is as follows：Referring to fig. 2；
I perpendicular S32750 super-duplex stainless steel plate 4 is opened K-type groove 6 by welding zone domain, and bevel angle is 65 °；
II, which welds preceding K-type groove 6, carries out 80 to two sides 500mm ± 20mm range of perpendicular S32750 super-duplex stainless steel plate 4
DEG C of ± 10 DEG C preheatings, preheat 45min；The upper surface for the flat S32750 super-duplex stainless steel plate 8 that K-type groove 6 is contacted simultaneously
Two sides 500mm ± 20mm range carries out 80 DEG C of ± 10 DEG C of preheatings, preheats 45min；
III uses 2507/P100 welding rod, carries out welding rod to the two sides of the K-type groove 6 of perpendicular S32750 super-duplex stainless steel plate 4
Arc welding, thermal weld stress are controlled in 1.1 ~ 1.4kJ/mm；Overall process is welded, to perpendicular S32750 super-duplex stainless steel plate 4
Two sides 500mm ± 20mm range of K-type groove 6, uses the side of two pieces of thickness 56mm（It is hung with rope）Alumina silicate insulation blanket 5 is protected
Temperature；Meanwhile the lower alumina silicate insulation blanket 9 of one piece of thickness 56mm is padded below flat S32750 super-duplex stainless steel plate 8, and upper
6 two sides 500mm ± 20mm range of surface K-type groove, is kept the temperature using the upper alumina silicate insulation blanket 7 of two pieces of thickness 56mm；
Interlayer temperature is 80 DEG C ± 10 DEG C in IV welding process；
V postwelding removes thermal insulation material, air-cooled.
After the completion of welding through above-mentioned steps, weld metal austenite phase content is 53%, balanced austenite, ferrite two
Phase Proportion improves corrosion resisting property, improves the mechanical property of welding point, its weld seam is precipitated without σ phase after measured, pitting corrosion
Rate is 2.2mdd, and welding point tension is broken in riser base material.
Embodiment three
The present embodiment is shown in Fig. 3, it is in step I, and the groove opened by welding zone domain is double V-groove 11, and soldered is two pieces V mouthfuls
S32750 super-duplex stainless steel plate 10.It is other to be the same as example 1.
After the completion of welding through above-mentioned steps, weld metal austenite phase content is 51%, balanced austenite, ferrite two
Phase Proportion improves corrosion resisting property, improves the mechanical property of welding point, its weld seam is precipitated without σ phase after measured, pitting corrosion
Rate is 2.0mdd, and the strong 915MPa of welding point tension breaks in base material.
Claims (5)
1. a kind of S32750 super-duplex stainless steel thick plates method, it include the steps that it is following successively：
I by welding zone domain bevel, bevel angle is 65 ° ± 1 °；
80 DEG C of ± 10 DEG C of preheatings are carried out to groove and its two sides 300~500mm range before II welding, preheat 40min or more；
III implements welding using welding rod, and thermal weld stress control welds overall process to groove two sides 300 in 1.1 ~ 1.4kJ/mm
~500mm range is kept the temperature using the above thermal insulation material of thickness 50mm；
Interlayer temperature is 80 DEG C ± 10 DEG C in IV welding process；
V postwelding removes thermal insulation material, air-cooled.
2. S32750 super-duplex stainless steel thick plates method according to claim 1, steps characteristic are：Step III
Be using 2507/P100 welding rod implement welding.
3. any S32750 super-duplex stainless steel thick plates method, steps characteristic according to claim 1 or in 2
It is：In step I, the groove opened by welding zone domain is double V-groove.
4. any S32750 super-duplex stainless steel thick plates method, steps characteristic according to claim 1 or in 2
It is；In step I, the groove opened by welding zone domain is X-type groove.
5. any S32750 super-duplex stainless steel thick plates method, steps characteristic according to claim 1 or in 2
It is：In step I, the groove opened by welding zone domain is K-type groove；III welding overall process, to perpendicular S32750 super-duplex stainless steel
Two sides 500mm ± 20mm range of the K-type groove of plate is kept the temperature using two pieces of above thermal insulation materials of thickness 50mm；Meanwhile it is flat
One piece of above thermal insulation material of thickness 50mm is padded below S32750 super-duplex stainless steel plate to be kept the temperature；And in upper surface K-type
Groove two sides 500mm ± 20mm range is kept the temperature using two pieces of above thermal insulation materials of thickness 50mm.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112877609A (en) * | 2021-01-11 | 2021-06-01 | 中国石油天然气集团有限公司 | Duplex stainless steel continuous expansion pipe for acid well and manufacturing method thereof |
| CN115121918A (en) * | 2022-08-24 | 2022-09-30 | 中国科学院金属研究所 | Welding method for reducing delta-ferrite harmful phase in martensitic heat-resistant steel weld joint with 12% of Cr in nuclear reactor core |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5440090A (en) * | 1993-06-07 | 1995-08-08 | Atlantic Richfield Company | Duplex stainless steel welding method |
| CN101288918A (en) * | 2007-04-17 | 2008-10-22 | 中国石油天然气集团公司管材研究所 | 22Cr duplex phase stainless tube welding method |
| CN101733523A (en) * | 2010-01-12 | 2010-06-16 | 中国石油大学(华东) | Two phase stainless steel welding process for medium plates |
| CN102941402A (en) * | 2012-11-09 | 2013-02-27 | 太原科技大学 | Super duplex stainless steel welding method |
-
2018
- 2018-07-09 CN CN201810743706.5A patent/CN108890074A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5440090A (en) * | 1993-06-07 | 1995-08-08 | Atlantic Richfield Company | Duplex stainless steel welding method |
| CN101288918A (en) * | 2007-04-17 | 2008-10-22 | 中国石油天然气集团公司管材研究所 | 22Cr duplex phase stainless tube welding method |
| CN101733523A (en) * | 2010-01-12 | 2010-06-16 | 中国石油大学(华东) | Two phase stainless steel welding process for medium plates |
| CN102941402A (en) * | 2012-11-09 | 2013-02-27 | 太原科技大学 | Super duplex stainless steel welding method |
Non-Patent Citations (2)
| Title |
|---|
| 中国技术成果大全编辑部: "《中国技术成果大全 1991年第12期 总第74期 山东专辑》", 31 December 1991, 科学技术文献出版社 * |
| 程学辉: "超级双相钢25O7药芯焊丝焊接工艺", 《现代焊接》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112877609A (en) * | 2021-01-11 | 2021-06-01 | 中国石油天然气集团有限公司 | Duplex stainless steel continuous expansion pipe for acid well and manufacturing method thereof |
| CN115121918A (en) * | 2022-08-24 | 2022-09-30 | 中国科学院金属研究所 | Welding method for reducing delta-ferrite harmful phase in martensitic heat-resistant steel weld joint with 12% of Cr in nuclear reactor core |
| CN115121918B (en) * | 2022-08-24 | 2022-12-13 | 中国科学院金属研究所 | Welding method for reducing content of delta-ferrite harmful phase in weld joint of martensite refractory steel with 12% of Cr in nuclear reactor core |
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Application publication date: 20181127 |