CN106399842A - Steel for submerged arc welding wire for heat-resistant steel and production method of steel - Google Patents
Steel for submerged arc welding wire for heat-resistant steel and production method of steel Download PDFInfo
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- CN106399842A CN106399842A CN201611096320.7A CN201611096320A CN106399842A CN 106399842 A CN106399842 A CN 106399842A CN 201611096320 A CN201611096320 A CN 201611096320A CN 106399842 A CN106399842 A CN 106399842A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/84—Controlled slow cooling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses steel for a submerged arc welding wire for heat-resistant steel, comprising the components in percentage by weight: 0.07-0.11% of C, 0.55-0.75% of Mn, less than or equal to 0.1% of Si, less than or equal to 0.012% of P, less than or equal to 0.01% of S, 2.0-3.0% of Cr, 0.90-1.50% of Mo, less than or equal to 0.01% of Al, less than or equal to 0.01% of V, less than or equal to 0.01% of Sn, less than or equal to 0.01% of Sb, less than or equal to 0.006% of O and less than or equal to 0.004% of N. The production method comprises the steps of desulphurizing molten iron; smelting, refining and continuously casting a square billet; carrying out conventional highline rolling after conventionally heating the square billet; slowly cooling; and checking. Not only is the steel simple in component design, but also a welding seam still has favorable tensile strength and toughness under the condition that the working temperature is 600 DEG C, namely, Rm is larger than or equal to 550MPa and KV2 (-12 DEG C) is larger than or equal to 60J after thermal treatment is finished.
Description
Technical field
The present invention relates to a kind of steel for welding wire and production method, particularly belong to welding wire for submerged-arc welding steel and production method, more suitable
For heat-resisting submerged arc welding wire for steel steel and production method.
Background technology
Heat resisting steel is usually used in manufacturing in boiler, steam turbine, dynamic power machine and the industrial department such as petrochemical industry, nuclear power in high temperature
The parts of lower work.And in boiler, thermoelectricity industry, equipment generally require to be operated in the larger environment of temperature change it is desirable to
Equipment is respectively provided with the mechanical properties such as excellent intensity, toughness in high/low temperature.Welding is in these hot operation equipment makings
Important procedure, weld seam also must have same performance.For this reason, the welding material of the coupling of heat resisting steel, that is, welding wire similarly will
Possesses excellent intensity and toughness.Because the deposition efficiency of submerged-arc welding is high, not release guard gas, and condition of work can be made to change
Kind, therefore occupy critical role in the welding of steel plate.
At present, people are in order that weld seam has the purpose of excellent intensity and toughness, all necessary by adding in weld seam
The alloying element such as Mo, Ni, Cr, to increase elevated temperature strength.But, if only carrying out the simple increase of alloying element, on the contrary can
Lead to welding seam toughness drastically to decline, make hot operation equipment occur in low temperature environment fragility to lose efficacy.
Through retrieval, Chinese Patent Application No. is the document of CN200810046589.3, discloses a kind of Mayari
Welding wire for submerged-arc welding, its chemical constituent and content are：C：0.05 ~ 0.16%, Mn：0.40 ~ 1.00%, Si：0.05 ~ 0.35%, P≤
0.015%, S≤0.015%, Cu≤0.35%, Cr：0.70 ~ 1.60%, Ni≤0.20%, Mo：0.40 ~ 0.80%, V≤0.005%, remaining
Measure as Fe.Cr, Mo alloying element is added to have certain heat resistance to ensure deposited metal in this invention welding wire, its deposited metal
Tensile strength >=550MPa,（-12℃）KV2>=27J, but in embodiment data, there is no drawing by high temperature, post weld heat treatment etc.
Performance.
Content of the invention
The purpose of the present invention, in the deficiency existing with solution prior art, provides a kind of operating temperature under the conditions of 600 DEG C,
Weld seam still has good tensile strength and excellent toughness be heat-treated after Rm>=550MPa, KV2（-12℃）>=60J's is heat-resisting
Submerged arc welding wire for steel steel and production method.
Realize the measure of above-mentioned purpose：
A kind of heat-resisting submerged arc welding wire for steel steel, its component and weight percent content are：C：0.07 ~ 0.11%, Mn：0.55~
0.75%, Si≤0.1%, P≤0.012%, S≤0.01%, Cr：2.0 ~ 3.0%, Mo：0.90 ~ 1.50%, Al≤0.01%, V≤
0.01%, Sn≤0.01%, Sb≤0.01%, O≤0.006%, N≤0.004%, remaining is iron and inevitable impurity.
Produce a kind of method of heat-resisting submerged arc welding wire for steel steel, its step：
1）Desulfurizing iron；
2）Smelt and refining and billet continuous casting；Molten steel terminal component and weight percent content are：C：0.07 ~ 0.11%, Mn：
0.55 ~ 0.75%, Si≤0.1%, P≤0.012%, S≤0.01%, Cr：2.0 ~ 3.0%, Mo：0.90 ~ 1.50%, Al≤0.01%, V
≤ 0.01%, Sn≤0.01%, Sb≤0.01%, O≤0.006%, N≤0.004%, remaining is iron and inevitable impurity；
3）Carry out high line pair rolling after square billet conventional heating；
4）Carry out slow cooling：Control stelmor linear speed in 0.2 ~ 0.4m/s, and blower fan is fully closed, stay-warm case is complete cover under conditions of slow
It is cooled to less than 450 DEG C, union is rolled up；
5）Inspection.
The effect of each main intensified element and technique and mechanism in the present invention：
C：C is improved the effect of deposited metal intensity, but the too high hardened structure forming embrittlement of C content makes the toughness of weld seam drop
Low, for improving toughness and improving cracking resistance, the content of carbon should be as lower as possible.But, during submerged arc welding, carbon has
Larger scaling loss, so reduce carbon impact to toughness and cracking resistance, in present invention carbon content for proof strength and as far as possible
Control in 0.07-0.11%.
Mn：Mn is good deoxidier and solution strengthening element, prevents from causing the formation of the iron sulfide of fire check；But work as
When its content is higher than 0.75%, Toughness of Deposited Metal can be affected, so manganese content controls in 0.55-0.75%.
Si：Si is effective deoxidant element in welding process, contributes to the removal of Slag inclusion in molten bath deoxidation and molten bath, but
The low-temperature flexibility of weld seam can be reduced when silicone content is too high；Because solder flux can be to a certain amount of silicon of transition in deposited metal, this
Silicone content in invention is limited in≤0.1%.
Mo：Mo is a kind of effective intensified element, and plays the role of fining ferrite grains, improves weld seam heat-treatability
Energy, heat resistance, when its too high levels, can reduce the toughness of weld seam.Therefore it is limited in 0.9-1.5%.
Cr：Cr is improved the effect of intensity and quenching degree, and metal surface can be promoted at high temperature to generate fine and close passivating film,
Prevent from continuing oxidation, heat resistance can be improved, chromium is that heat resisting steel possesses one of essential element of powerful heat resistance.
When its content is relatively low, deposited metal heat resistance can be affected.When its content is higher than 3.0%, the toughness of weld seam can be reduced.This
In invention, chromium content controls in 2.0-3.0%.
Al、V、Sn、Sb：These elements are all that the harmful element in welding process reduces it should try one's best.
P, S in welding wire of the present invention broadly falls into the toughness to deposited metal has the element of very big harm it should reduce as far as possible.
The welding wire steel of the present invention is to ensure heat resistance, improves the content of Cr, Mo element.
In the production process of welding wire steel, when wire rod carries out slow cooling, why fully closed, the full lid of stay-warm case slow using blower fan
Cold treatment, primarily to reducing the intensity of wire rod, is beneficial to follow-up drawing welding wire operation, reduces the annealing time during drawing
Number.
Compared with prior art, composition not only designs simply the present invention, and under the conditions of operating temperature is 600 DEG C, weldering
Seam still has good tensile strength and excellent toughness, that is, R after being heat-treatedm>=550MPa, KV2（-12℃）≥60J.
Specific embodiment
Below the present invention is described in detail：
Table 1 is the chemical composition comparative example of various embodiments of the present invention and comparative example；
Table 2 is the test welding main technologic parameters list of various embodiments of the present invention and comparative example；
Table 3 is the mechanical property list of deposited metal after various embodiments of the present invention and the weld seam heat treatment of comparative example.
Various embodiments of the present invention all follow the steps below production：
1）Desulfurizing iron；
2）Smelt and refining and billet continuous casting；Molten steel terminal component and weight percent content are：C：0.07 ~ 0.11%, Mn：
0.55 ~ 0.75%, Si≤0.1%, P≤0.012%, S≤0.01%, Cr：2.0 ~ 3.0%, Mo：0.90 ~ 1.50%, Al≤0.01%, V
≤ 0.01%, Sn≤0.01%, Sb≤0.01%, O≤0.006%, N≤0.004%, remaining is iron and inevitable impurity；
3）Carry out high line pair rolling after square billet conventional heating；
4）Carry out slow cooling：Control stelmor linear speed in 0.2 ~ 0.4m/s, and blower fan is fully closed, stay-warm case is complete cover under conditions of slow
It is cooled to less than 450 DEG C, union is rolled up；
5）Inspection.
The chemical composition comparative example of table 1 various embodiments of the present invention and comparative example（wt.%）
The test welding parameter comparative example of each embodiment of table 2 steel of the present invention and comparative example
Table 3 is the mechanical property list of deposited metal after various embodiments of the present invention and the weld seam heat treatment of comparative example
Test welding condition：Test plate (panel) thickness 30mm, Rm575MPa, Rp0.2510MPa, KV2(- 12 DEG C) is 114J, double open angle
For 60 ° of double V-groove；Weld heat input adopts 35KJ/cm, welding current～630A, arc voltage～31V, and speed of welding～
34cm/min；SJ105 is the fluorine calcium type alkalescent sintered flux of ultralow P, and solder flux main assembly is SiO2≤ 20%,（CaO+MgO+
MnO+CaF2) >=50%, CaF2>=15%, P≤0.015%, S≤0.020%, V≤0.01, Sn≤0.01, Sb≤0.01；Postwelding gold
Belong to and carry out 710 DEG C of+2h heat treatments.
From table 3 it can be seen that embodiments of the invention 1 ~ 8 are through using different welding procedures, weld seam is through 710 DEG C of postwelding warm
Process, its deposited metal is respectively provided with preferable intensity and impact flexibility, and drawing by high temperature also has higher intensity.Comparative example 1, due to
In welding wire, C content is higher than the upper limit of the present invention, and Toughness of Deposited Metal is low；Comparative example 2, because in welding wire, C content is less than this
Bright lower limit, and other alloying element content is not also high, causes deposited metal low strength.
This specific embodiment only most preferably enumerates, not the restricted enforcement to technical solution of the present invention.
Claims (2)
1. a kind of heat-resisting submerged arc welding wire for steel steel, its component and weight percent content are：C：0.07 ~ 0.11%, Mn：0.55~
0.75%, Si≤0.1%, P≤0.012%, S≤0.01%, Cr：2.0 ~ 3.0%, Mo：0.90 ~ 1.50%, Al≤0.01%, V≤
0.01%, Sn≤0.01%, Sb≤0.01%, O≤0.006%, N≤0.004%, remaining is iron and inevitable impurity.
2. produce a kind of method of heat-resisting submerged arc welding wire for steel steel as claimed in claim 1, its step：
1）Desulfurizing iron；
2）Smelt and refining and billet continuous casting；Molten steel terminal component and weight percent content are：C：0.07 ~ 0.11%, Mn：
0.55 ~ 0.75%, Si≤0.1%, P≤0.012%, S≤0.01%, Cr：2.0 ~ 3.0%, Mo：0.90 ~ 1.50%, Al≤0.01%, V
≤ 0.01%, Sn≤0.01%, Sb≤0.01%, O≤0.006%, N≤0.004%, remaining is iron and inevitable impurity；
3）Carry out high line pair rolling after square billet conventional heating；
4）Carry out slow cooling：Control stelmor linear speed in 0.2 ~ 0.4m/s, and blower fan is fully closed, stay-warm case is complete cover under conditions of slow
It is cooled to less than 450 DEG C, union is rolled up；
5）Inspection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611096320.7A CN106399842A (en) | 2016-12-02 | 2016-12-02 | Steel for submerged arc welding wire for heat-resistant steel and production method of steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611096320.7A CN106399842A (en) | 2016-12-02 | 2016-12-02 | Steel for submerged arc welding wire for heat-resistant steel and production method of steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106399842A true CN106399842A (en) | 2017-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611096320.7A Pending CN106399842A (en) | 2016-12-02 | 2016-12-02 | Steel for submerged arc welding wire for heat-resistant steel and production method of steel |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS594994A (en) * | 1982-06-30 | 1984-01-11 | Kawasaki Steel Corp | Submerged arc welding method of heat resistant low alloy steel |
| CN1337292A (en) * | 2000-08-16 | 2002-02-27 | 中国科学院金属研究所 | Welding wire for submerged-arc welding of low-carbon Cr-Mo steel |
| CN1821432A (en) * | 2005-02-17 | 2006-08-23 | 株式会社神户制钢所 | Weld metal of low temperature toughness and SR cracking resistance used for high-strength Cr-Mo steel |
| JP2012511431A (en) * | 2008-12-09 | 2012-05-24 | エール・リキード・ウェルディング・フランス | Flux and wire for submerged arc welding of CrMoV steel |
| CN104745943A (en) * | 2015-03-25 | 2015-07-01 | 武汉钢铁(集团)公司 | Heat-resistance metal by melting and submerged arc deposition preparation method thereof |
| CN104955607A (en) * | 2013-02-04 | 2015-09-30 | 株式会社神户制钢所 | SUBMERGED ARC WELDING WIRE FOR HIGH-STRENGTH 2.25Cr-1Mo-V STEEL AND WELD METAL |
| CN105562961A (en) * | 2015-12-22 | 2016-05-11 | 本钢板材股份有限公司 | Preparation method for H08MnA no-twist controlled-cooling hot-rolled wire rod for submerged-arc welding wire |
-
2016
- 2016-12-02 CN CN201611096320.7A patent/CN106399842A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS594994A (en) * | 1982-06-30 | 1984-01-11 | Kawasaki Steel Corp | Submerged arc welding method of heat resistant low alloy steel |
| CN1337292A (en) * | 2000-08-16 | 2002-02-27 | 中国科学院金属研究所 | Welding wire for submerged-arc welding of low-carbon Cr-Mo steel |
| CN1821432A (en) * | 2005-02-17 | 2006-08-23 | 株式会社神户制钢所 | Weld metal of low temperature toughness and SR cracking resistance used for high-strength Cr-Mo steel |
| JP2012511431A (en) * | 2008-12-09 | 2012-05-24 | エール・リキード・ウェルディング・フランス | Flux and wire for submerged arc welding of CrMoV steel |
| CN104955607A (en) * | 2013-02-04 | 2015-09-30 | 株式会社神户制钢所 | SUBMERGED ARC WELDING WIRE FOR HIGH-STRENGTH 2.25Cr-1Mo-V STEEL AND WELD METAL |
| CN104745943A (en) * | 2015-03-25 | 2015-07-01 | 武汉钢铁(集团)公司 | Heat-resistance metal by melting and submerged arc deposition preparation method thereof |
| CN105562961A (en) * | 2015-12-22 | 2016-05-11 | 本钢板材股份有限公司 | Preparation method for H08MnA no-twist controlled-cooling hot-rolled wire rod for submerged-arc welding wire |
Non-Patent Citations (2)
| Title |
|---|
| 本书编辑委员会 编: "《轧钢新技术3000问（上）（型材分册）》", 31 August 2005 * |
| 机械科学研究院哈尔滨焊接研究所 编: "《焊接材料产品手册》", 30 September 2012 * |
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Effective date of registration: 20170616 Address after: 430083 Qingshan District, Hubei, Wuhan factory before the door No. 2 Applicant after: Wuhan iron and Steel Company Limited Address before: 430083 Qingshan District, Hubei, Wuhan factory before the door No. 2 Applicant before: WUHAN IRON AND STEEL CORPORATION |
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