CN1337292A - Welding wire for submerged-arc welding of low-carbon Cr-Mo steel - Google Patents
Welding wire for submerged-arc welding of low-carbon Cr-Mo steel Download PDFInfo
- Publication number
- CN1337292A CN1337292A CN 00110787 CN00110787A CN1337292A CN 1337292 A CN1337292 A CN 1337292A CN 00110787 CN00110787 CN 00110787 CN 00110787 A CN00110787 A CN 00110787A CN 1337292 A CN1337292 A CN 1337292A
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- Prior art keywords
- welding
- low
- equal
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- steel
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- 238000003466 welding Methods 0.000 title claims abstract description 31
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 11
- 239000010959 steel Substances 0.000 title claims abstract description 11
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 6
- 239000000126 substance Substances 0.000 claims abstract description 7
- 229910045601 alloy Inorganic materials 0.000 abstract description 2
- 239000000956 alloy Substances 0.000 abstract description 2
- 229910001149 41xx steel Inorganic materials 0.000 abstract 1
- 239000003208 petroleum Substances 0.000 abstract 1
- 239000002184 metal Substances 0.000 description 20
- 229910052751 metal Inorganic materials 0.000 description 20
- 239000000203 mixture Substances 0.000 description 5
- 238000005496 tempering Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000009931 harmful effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 235000006708 antioxidants Nutrition 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
Landscapes
- Arc Welding In General (AREA)
Abstract
The present invention relates to a low-carbon Cr-Mo steel submerged arc welding wired rod, and its chemical components are (wt%) C 0.05-0.15 Mn 0.3-1.5, Si 0.1-0.6, Cr 0.8-2, Mo 0.1-1.0% Ti is less than or equal to 0.12, S is less than or equal to 0.005, P is less than or equal to 0.008. Sn is less than or equal to 0.001, As is less than or equal to 0.001, and the rest is Fe. After the invented wire rod is used for welding, and tempered for 5 hr. at 690 deg.C, it possesses excellent low-temp. toughness. It is suitable for welding 15 CrMo and 14CrIMo low alloy heat-resistant steels extensively used in the fields of power station boiler, petroleum chemical industry and nuclear power, etc.
Description
The invention belongs to field of welding material, mainly be applicable to submerged-arc welding, be welded on the Cr-Mo Mayari of department's extensive uses such as power engineering and petrochemical industry.
With Cr-Mo is low, the middle alloy heat resisting steel of base, has good non-oxidizability and heat resistance, and operating temperature can reach 600 ℃, is widely used in making the steam power generating equipment.This class steel also has the good anti-sulphur and the ability of hydrogen-type corrosion, has therefore also obtained using widely in petrochemical industry.
For Mayari (as 15CrMo, 14Cr1Mo), generally be under condition of heat treatment, to weld, the postwelding great majority will carry out high tempering to be handled, its most important performance indications are the requirements to toughness, because the raising of toughness helps the raising of other performance (as temper brittleness, high-temperature behavior).
At present, manual metal-arc welding and submerged-arc welding are the main method of Cr-Mo Mayari welding.In order to guarantee Weld Performance and mother metal coupling, require also should have good low-temperature flexibility after the processing of weld metal postwelding high tempering.And the deposited metal of R307 (E5515-B2) welding rod that the present manual metal-arc welding of China is adopted, postwelding is after high tempering is handled, and low-temperature impact toughness is A
KV-20 ℃〉=60J, the low-temperature flexibility of weld metal is relatively low.Therefore, be necessary to develop a kind of welding material with higher low-temperature flexibility.
Purpose of the present invention is to provide a kind of postwelding to use under the high tempering condition of heat treatment, and the low-temperature flexibility of weld seam is higher, has the welding wire for submerged-arc welding of enough creep-resistant properties and creep rupture strength simultaneously.
Based on above-mentioned consideration, the concrete chemical composition (weight %) of welding wire of the present invention is: C0.05～0.15, and Mn0.3～1.5, Si0.1～0.6, Cr0.8～2, Mo0.1～1.0, S≤0.005, P≤0.008, Sn≤0.001, As≤0.001, surplus is Fe.
Can also add Ti0.007～0.10 among the present invention.
Now welding wire design of chemical composition foundation of the present invention is described below:
In Cr-Mo Mayari weld metal, Cr, Mo are important alloying elements, they play effects such as reinforcement, anti-oxidant, anticorrosive and structure stability, and their content is fixing coupling basically.
The C content of weld metal will be a little less than the C content of mother metal, promptly less than 0.15%.The too high or too low performance requirement that all can not satisfy weld seam of phosphorus content.For the 14Cr1Mo steel, the optimum range of weld metal carbon content is 0.08～0.12%.
In the Mayari weld metal, Mn helps the formation of acicular ferrite, and is favourable to toughness, but it impels the segregation aggravation, produces certain illeffects.Therefore, the content of Mn should be selected suitable scope.
Si in the weld metal also has double action, and Si plays a part favourable as a kind of reduction elements butt welded seam metallicity, is to guarantee that weld seam compactness is necessary.But Si produces harmful effect to the toughness that Cr-Mo steel weld metal eliminates stress after handling, and aggravation temper brittleness.So in Cr-Mo Mayari weld seam, the Si content range is 0.15～0.35%.
Add microelement Ti in the weld metal, help the formation of acicular ferrite in the weld metal, improve the toughness of weld metal.
S, P, As, Sn are harmful elements in the weld metal, can obviously reduce the toughness of weld metal, increase temper brittleness.So answer strictness to limit its content.
Welding wire of the present invention compared with prior art has following advantage:
1, weld seam of the present invention has good comprehensive performances, and particularly postwelding has very high toughness after high tempering is handled, and is suitable for the welding of the Cr-Mo Mayari that uses under the post weld heat treatment condition.
2, the combination property of welding wire of the present invention is: σ
s〉=570MPa, δ
5〉=24%, AK
V-20 ℃〉=170J.
Below by embodiment in detail the present invention is described in detail.
Embodiment:
According to chemical composition scope of the present invention, smelted two stove welding wire steels, become the welding wire of φ 4.0mm through the annealing draw, with the welding of SJ101 solder flux coupling, the deposited metal composition of gained is listed in table 1 then.The mechanical performance of deposited metal is listed in table 2.
The chemical composition of table 1 deposited metal (mass fraction, %)
| Solder flux | Welding wire | ????C | ???Mn | ???Si | ???Cr | ????Ti | ???Mo | ????S | ????P | ????Sn | ????As |
| ?SJ101 | ??E1 | ??0.064 | ??1.11 | ??0.37 | ??1.20 | ????- | ??0.40 | ??0.0062 | ??0.015 | ??0.001 | ??0.001 |
| ?SJ101 | ??E2 | ??0.069 | ??1.13 | ??0.43 | ??1.25 | ??0.013 | ??0.45 | ??0.008 | ??0.021 | ??0.001 | ??0.001 |
Table 2 deposited metal mechanical performance (690 ℃ * 5h of postwelding temper)
| Solder flux | Welding wire | ??σ s?(MPa) | ??σ b?(MPa) | ???δ 5， ????％ | ???ψ， ???％ | ???A KV(J) average | |
| ?20℃ | -20℃ | ||||||
| ??SJ101 | ???E1 | ???580 | ???686 | ????27 | ???76 | ??222 | ??171 |
| ??SJ101 | ???E2 | ???579 | ???660 | ????27 | ???75 | ??188 | ??164 |
Claims (2)
1, a kind of welding wire for submerged-arc welding of low-carbon Cr-Mo steel is characterized in that its chemical component weight percentage is: C0.05～0.15, Mn0.3～1.5, Si0.1～0.6, Cr0.8～2, Mo0.1～1.0, S≤0.005, P≤0.008, Sn≤0.001, As≤0.001, surplus is Fe.
2, according to the described welding wire for submerged-arc welding of low-carbon Cr-Mo steel of claim 1, it is characterized in that: add Ti0.007～0.10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00110787 CN1337292A (en) | 2000-08-16 | 2000-08-16 | Welding wire for submerged-arc welding of low-carbon Cr-Mo steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00110787 CN1337292A (en) | 2000-08-16 | 2000-08-16 | Welding wire for submerged-arc welding of low-carbon Cr-Mo steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1337292A true CN1337292A (en) | 2002-02-27 |
Family
ID=4580755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00110787 Pending CN1337292A (en) | 2000-08-16 | 2000-08-16 | Welding wire for submerged-arc welding of low-carbon Cr-Mo steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1337292A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105014261A (en) * | 2015-07-30 | 2015-11-04 | 武汉铁锚焊接材料股份有限公司 | Seamless metal powder core type flux-cored wire for chromium-molybdenum steel |
| CN105108373A (en) * | 2015-06-09 | 2015-12-02 | 中广核工程有限公司 | Special welding rod for on-site welding main steam pipe in nuclear power station |
| CN106399842A (en) * | 2016-12-02 | 2017-02-15 | 武汉钢铁股份有限公司 | Steel for submerged arc welding wire for heat-resistant steel and production method of steel |
| CN109093286A (en) * | 2018-09-29 | 2018-12-28 | 四川西冶新材料股份有限公司 | A kind of 2.25Cr-1Mo steel exchange submerged arc welding welding wire and solder flux |
-
2000
- 2000-08-16 CN CN 00110787 patent/CN1337292A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105108373A (en) * | 2015-06-09 | 2015-12-02 | 中广核工程有限公司 | Special welding rod for on-site welding main steam pipe in nuclear power station |
| CN105108373B (en) * | 2015-06-09 | 2017-12-29 | 中广核工程有限公司 | Nuclear power station main steam line Site Welding welding rod special for special |
| CN105014261A (en) * | 2015-07-30 | 2015-11-04 | 武汉铁锚焊接材料股份有限公司 | Seamless metal powder core type flux-cored wire for chromium-molybdenum steel |
| CN106399842A (en) * | 2016-12-02 | 2017-02-15 | 武汉钢铁股份有限公司 | Steel for submerged arc welding wire for heat-resistant steel and production method of steel |
| CN109093286A (en) * | 2018-09-29 | 2018-12-28 | 四川西冶新材料股份有限公司 | A kind of 2.25Cr-1Mo steel exchange submerged arc welding welding wire and solder flux |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |