CN101565799A - Ultrahigh-strength stainless steel welding material and application thereof - Google Patents
Ultrahigh-strength stainless steel welding material and application thereof Download PDFInfo
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- CN101565799A CN101565799A CNA2008100364125A CN200810036412A CN101565799A CN 101565799 A CN101565799 A CN 101565799A CN A2008100364125 A CNA2008100364125 A CN A2008100364125A CN 200810036412 A CN200810036412 A CN 200810036412A CN 101565799 A CN101565799 A CN 101565799A
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Abstract
The invention provides an ultrahigh-strength stainless steel welding material which comprises the components by weight percentage: less than or equal to 0.03 of C, 0.4 to 1.2 of Mn, 0.5 to 1.0 of Si, 13 to 15 of Cr, 0.3 to 0.6 of Ti, 5 to 6 of Ni, less than or equal to 0.015 of S, less than or equal to 0.02 of P and the balance of Fe and inevitable impurities. The welding material has higher deposited metal tensile strength. The invention also provides an application of the welding material in martensitic stainless steel or ferritic stainless steel welding, and the joint welding can be quickly welded and cannot generate crackles by using the welding material.
Description
Technical field
The present invention relates to welding field, specifically, the present invention relates to a kind of ultrahigh-strength stainless steel welding material.
Background technology
Along with the requirement of high-strength loss of weight structure design, the stainless steel product of superelevation grade is widely used, and adopts austenitic stainless steel welding material such as ER308/309 welding wire that stainless steel product is welded at present usually.But when the tensile strength of material surpasses 700MPa, these welding materials can not satisfy structural requirement, along with the raising of strength grade, can bring very big difficulty to welding, need carry out preheating and postweld heat treatment usually and produce to avoid crackle.In addition, martensitic stainless steel and part ferritic stainless steel use the austenite welding material to weld for a long time, often cause galvanic corrosion.Therefore, when mother metal is not the austenite structure material, for the generation that prevents galvanic corrosion and have better intensity coupling and anti-galvanic corrosion ability, should avoid the application of austenite material.
Therefore, the object of the present invention is to provide a kind of ultrahigh-strength stainless steel welding material, this welding material has higher deposited metal tensile strength.Another object of the present invention is to provide the application of this welding material in Martensite Stainless Steel or ferritic stainless steel welding.
Summary of the invention
The invention provides a kind of welding material, it is characterized in that, comprise the moiety of following mass percent:
C： ≤0.03％
Mn： 0.4％～1.2％
Si： 0.5％～1.0％
Cr： 13％～15％
Ti： 0.3％～0.6％
Ni： 5％～6％
S： ≤0.015％
P： ≤0.02％
All the other are iron and unavoidable impurities.
Described welding material can be wire rod, or is welding wire.
The present invention adopts the Fe-Cr-Ni alloy system, on the basis of strictness control S, P constituent content, suitably adds a spot of Ti element.Each component effect is as follows:
C: the level that keeps ultralow C content among the present invention, because the assurance that proper C is a deposited metal has certain intensity, but if content is too high, not only easily and carbide forming element formation carbide such as Cr, produce poor chromium district, reduce the corrosion resistance nature of deposited metal, extension property also can be subjected to certain influence simultaneously, and too high C content also can produce the tendency of hot tearing in welding process.
Cr:Cr makes deposited metal have the assurance of certain corrosion resistance nature, must have appropriate C r content for this reason, guarantees to form passive film, strengthens corrosion resistance, and Cr content is crossed low or too high, all can not reach the intensity of deposited metal and the requirement of plastic property.
Mn: an amount of Mn also is the assurance that deposited metal has certain intensity, and simultaneously Mn also has the effect of desulfurization and deoxidation in the process of molten bath.
Si: an amount of Si helps to improve the flowability in molten bath stage molten bath on the one hand, and also help to combine formation slag inclusion thing on the other hand and float with oxygen, thus the content of oxygen in the reduction molten bath.
Ti: the Ti (C, N) that an amount of Ti and C coupling forms is can the particle of stable existence in liquid, utilizes the heterogeneous forming core effect of these precipitated phases to increase the core of solid-phase grain, can improve the quantity of solid phase forming core core, suppresses growing up of crystal grain.Refined crystalline strengthening is unique a kind of to plastic property such as extension beneficial method in present all enhancement methods.The superstrength of welding material of the present invention and extension property have benefited from thin brilliant malleableize and build up exactly.
The production technique of wire rod of the present invention, welding wire:
((φ 0.8～1.6mm) for φ 5.5～6.5mm) → heating → pickling → drawing → welding wire for die casting base → forging → square billet → heating → hot rolling → wire rod.
The present invention further provides the application of described welding material in Martensite Stainless Steel or ferritic stainless steel welding.
Described welding material uses consumable electrode gas to protect weldering, and heat is input as 0.4～0.6KJ/mm.Preferred 210～the 230A of welding current wherein, the preferred 23～24V of weldingvoltage, the preferred 400～500mm/min of welding speed, interlayer temperature is preferably less than 100 ℃.
Beneficial effect of the present invention is:
1, welding material of the present invention has superelevation tensile strength and good extension property, significantly is better than the performance with the class standard welding material.
2, welding material of the present invention can be widely used in the welding of steel grades such as Martensite Stainless Steel and ferritic stainless steel, substitutes the austenite welding material that adopts usually, reduces the production use cost, can finish joint fast and weld and can not crack.
Description of drawings
Fig. 1 represents the metallographic structure of welding material of the present invention.
Embodiment
Below for a more detailed description to the present invention in conjunction with the accompanying drawings with embodiment.These embodiment only are the descriptions to best mode for carrying out the invention, scope of the present invention are not had any restriction.
The embodiment of the invention has been enumerated the welding material (table 3) with following composition.Adopt the GMAW method to record the mechanical property (table 4) of welding material of the present invention.The contrast of the listed mechanical property of the present invention and existing standard (GB/T 983-1995) sees Table 5.
Table 3 embodiment composition
| Sequence number | C | Si | Mn | P | S | Cr | Ni | Ti |
| 1 | 0.027 | 0.69 | 1.21 | 0.014 | 0.006 | 13.04 | 5.90 | 0.6 |
| 2 | 0.026 | 0.70 | 1.19 | 0.013 | 0.008 | 13.36 | 5.60 | 0.30 |
| 3 | 0.026 | 0.72 | 1.24 | 0.008 | 0.006 | 13.03 | 5.90 | 0.32 |
| 4 | 0.016 | 0.66 | 0.78 | 0.015 | 0.007 | 15.08 | 5.01 | 0.47 |
The mechanical property of table 4 deposited metal
| Sequence number | Tensile strength MPa | Yield strength MPa | Unit elongation % |
| 1 | 995 | 725 | 14.5 |
| 2 | 1060 | 770 | 13.5 |
| 3 | 1070 | 795 | 13.5 |
| 4 | 1147 | 765 | 14.0 |
The contrast of the listed mechanical property of table 5 the present invention and existing standard (GB/T 983-1995)
| Tensile strength MPa | Yield strength MPa | Unit elongation % | |
| ER410NiMo | ≥760 | ≥15 | |
| ER630 | ≥930 | ≥7 | |
| The present invention | ≥990 | ≥700 | ≥13 |
Adopt the welding material in the embodiment of the invention that 00Cr12Ni ferritic stainless steel (thickness is 6mm) is carried out the GMAW welding, the strength of welded joint that obtains is 610MPa, 605MPa, breaks in mother metal.Pliability test (positive and negative, d=3a, 180 °), qualified, flawless.
Test-results shows, compares with existing standard, and the various performances of welding material of the present invention all are much higher than the standard-required of existing welding material, not only have higher weld metal and extend, and its intensity also reaches the scope of superstrength.
Welding material of the present invention can be applied in the gas metal-arc welding (GMAW) of martensitic stainless steel and ferritic stainless steel welding.Main application prospect comprises following industry: boilers and pressure vessel, building structure, engineering decorative, food sanitation etc.
Claims (4)
1, a kind of welding material is characterized in that, comprises the moiety of following mass percent:
C： ≤0.03％
Mn： 0.4％～1.2％
Si： 0.5％～1.0％
Cr： 13％～15％
Ti： 0.3％～0.6％
Ni： 5％～6％
S： ≤0.015％
P： ≤0.02％
All the other are iron and unavoidable impurities.
2, welding material as claimed in claim 1, described welding material are wire rod.
3, welding material as claimed in claim 1, described welding material are welding wire.
4, the application of the described welding material of claim 1 in Martensite Stainless Steel or ferritic stainless steel welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100364125A CN101565799A (en) | 2008-04-22 | 2008-04-22 | Ultrahigh-strength stainless steel welding material and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100364125A CN101565799A (en) | 2008-04-22 | 2008-04-22 | Ultrahigh-strength stainless steel welding material and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101565799A true CN101565799A (en) | 2009-10-28 |
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| CNA2008100364125A Pending CN101565799A (en) | 2008-04-22 | 2008-04-22 | Ultrahigh-strength stainless steel welding material and application thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102626836A (en) * | 2012-05-02 | 2012-08-08 | 武汉科技大学 | High-toughness solid wire for 1000MPa-level engineering machinery steel |
| CN104923967A (en) * | 2015-06-25 | 2015-09-23 | 江苏省沙钢钢铁研究院有限公司 | High-strength and high-toughness gas shielded welding wire and weld metal capable of being free of pre-heating |
| CN106563888A (en) * | 2015-10-10 | 2017-04-19 | 丹阳市华龙特钢有限公司 | High-cost-performance submerged-arc welding wire and producing method thereof |
| CN107081538A (en) * | 2017-05-12 | 2017-08-22 | 天长市通联焊业有限公司 | A kind of high-strength corrosion-resisting welding wire |
-
2008
- 2008-04-22 CN CNA2008100364125A patent/CN101565799A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102626836A (en) * | 2012-05-02 | 2012-08-08 | 武汉科技大学 | High-toughness solid wire for 1000MPa-level engineering machinery steel |
| CN104923967A (en) * | 2015-06-25 | 2015-09-23 | 江苏省沙钢钢铁研究院有限公司 | High-strength and high-toughness gas shielded welding wire and weld metal capable of being free of pre-heating |
| CN106563888A (en) * | 2015-10-10 | 2017-04-19 | 丹阳市华龙特钢有限公司 | High-cost-performance submerged-arc welding wire and producing method thereof |
| CN107081538A (en) * | 2017-05-12 | 2017-08-22 | 天长市通联焊业有限公司 | A kind of high-strength corrosion-resisting welding wire |
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Application publication date: 20091028 |