CN102152028A - High-strength and high-toughness flux-cored welding wire material for submerged arc welding with high heat input - Google Patents
High-strength and high-toughness flux-cored welding wire material for submerged arc welding with high heat input Download PDFInfo
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- CN102152028A CN102152028A CN 201110108484 CN201110108484A CN102152028A CN 102152028 A CN102152028 A CN 102152028A CN 201110108484 CN201110108484 CN 201110108484 CN 201110108484 A CN201110108484 A CN 201110108484A CN 102152028 A CN102152028 A CN 102152028A
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Abstract
The invention discloses a high-strength and high-toughness flux-cored welding wire material for submerged arc welding with high heat input. Flux-cored powder of the flux-cored welding wire is formed by mixing rutile99, FeSi45, manganese metal, Femo55, rare earth Ce99O2, FeTi25 and ferrous powder, and novel high-strength and high-toughness flux-cored welding wire materials with different diameters can be drawn by H08A steel bands. Ce in the novel high-strength and high-toughness flux-cored welding wire material is reacted with oxygen and sulfur in the welding metallurgical process, and ultrathin Ce oxysulfide substances (CexOxSx) with the diameter of 0.4 microns to 0.8 microns, such as CeO.CeS and CeO.MnO.(Mn,Cu)S, are easily formed, dispersed and uniformly distributed in metal in welding joints. The Ce oxysulfide substances peg and drag the shift of high-temperature austenite grain boundaries and hinder the growth of austenite grains. Meanwhile, the Ce oxysulfide substances induce ferrite to form nuclei in the austenite grains and refine welding joint metal grains. The high-strength and high-toughness flux-cored welding wire material can be used for the multi-wire submerged arc automatic welding of high-strength low-alloy steel of medium and thick plates with the heat input quantity of 60-150KJ/cm.
Description
Technical field
The present invention relates to a kind of solder wire material, be specially a kind of high tough flux-cored wire material that is used for big heat input submerged-arc welding, it has the characteristics of high strength, high tenacity.
Background technology
The manufacturing of mechanical engineering structures such as skyscraper, Longspan Bridge, large ship, overlength petroleum pipeline develops into an important trend to maximization, hugeization direction.In order to satisfy the mechanical engineering structure to the demand that maximizes, hugeization direction develops, China has successfully developed big heat input, and (hot input quantity is 60～150KJ/cm) welding cut deal Aldecors (High Strength Low Alloy Steel is called for short HSLA).In the big giant-scale engineering structure manufacture process, extensively adopt the efficient height, energy-conservation, easily realize the mariages of automation, the three big heat input of multiplewire submerged arc welding welding methods.
When big heat was imported welded H SLA steel, fast because of liquid metal cooling velocity in the welding pool, thermograde was big, and weld metal crystal grain is grown up rapidly, and crystallite dimension often surpasses 120 μ m, and the crystallite dimension of HSLA steel is all below 10 μ m.The crystallite dimension of weld metal is more than ten times of crystallite dimension of HSLA steel, the alligatoring of weld metal crystal grain, cause toughness to reduce significantly, the obdurability of the obdurability of weld metal and HSLA steel does not seriously match, weld metal becomes one of welded weakness zone, is threatening the safety in utilization of structure.
Summary of the invention
The object of the present invention is to provide a kind of high tough flux-cored wire material that is used for big heat input submerged-arc welding, this material can replace the welding material of the easy alligatoring of weld metal crystal grain of use at present, can improve the obdurability of weld metal.
A kind of high tough flux-cored wire material that is used for big heat input submerged-arc welding provided by the invention is characterized in that medicine core powder is mixed by alloyed powder and mineral powder, and the component and the percentage by weight of each alloyed powder and mineral powder are: 99 rutile 8～12%; 45 ferrosilicon 5～7%; Manganese metal 4～8%; 55 molybdenum-irons 0.5～2%; 99 oxide rare earth ceriums 2～6%; 25 ferrotianiums 0.3～1.0%; Surplus is an iron powder.
The present invention is directed to easy thickization of big hot input quantity submerged-arc welding seam metal grain of present usefulness, cause the obdurability deficiency of weld metal, be difficult to satisfy the difficult problem of instructions for use.Invent a kind of rare earth cerium (Ce) that contains, be applicable to big heat input used for submerged arc welding high-intensity high-tenacity novel medicine core solder wire material.Solder wire material provided by the invention can make the crystal grain of big heat input welded H SLA steel weld metal obtain refinement, replace the welding material of the easy alligatoring of weld metal crystal grain of use at present, improve the obdurability of weld metal, the obdurability of weld metal and HSLA steel mother metal are complementary.Utilize high-intensity high-tenacity novel medicine core solder wire material of the present invention, be equipped with commercially available corresponding solder flux, the crystallite dimension that can guarantee big heat input submerged-arc welding seam metal is improved the obdurability of big heat input weld metal below 15 μ m.
The present invention mainly use Ce in the Welding Metallurgy process with oxygen, reaction of Salmon-Saxl, easily forming diameter is the ultra-fine Ce oxysulfide particle (Ce of 0.4 μ m～0.8 μ m
xO
xS
x), as CeOCeS, CeOMnO (Mn, Cu) S, disperse, be uniformly distributed in the weld metal.The migration of Ce oxysulfide particle anchoring, towing high temperature austenite crystal boundary hinders austenite crystal and grows up.Ce oxysulfide matter is induced the ferrite forming core, refinement weld metal crystal grain in austenite crystal simultaneously.
The specific embodiment
Theoretical foundation of the present invention:
The refinement of big heat input ferrous materials crystal grain, often utilizing diameter is the fine particle of 0.4 μ m～0.8 μ m, hinders grain growth as TiN, VN etc., and utilizes Ti
2O
3Etc. thin field trash, induce ferrite forming core in austenite crystal, (Intergranular Ferrite is called for short IGF to form so-called intracrystalline ferrite; Claim acicular ferrite Acicular Ferrite again, be called for short AF).Utilize Ti
2O
3Etc. thin field trash, induce ferrite forming core in austenite crystal, this technology is called oxide metallurgical technology (Oxide Metallurgy).Because the crystallite dimension of intracrystalline ferrite (IGF) is about about 5 μ m, if the IGF more than 70% is arranged in the ferrous materials, the crystallite dimension integral body of ferrous materials can refine to below the 10 μ m.
The metallurgical process of weld metal and the metallurgical process of ferrous materials are basic identical, the oxide metallurgical technology of ferrous materials can be applied to the grain refinement of big heat input submerged-arc welding seam metal.There is the research report to utilize the fine foreign matter Ti of Ti residual in the weld metal, Al deoxidation at present
2O
3, A1
2O
3(Mn, Cu) S induces the IGF forming core, refinement weld metal crystal grain, the strength and toughness of raising weld metal.But the fine foreign matter Ti of Ti, Al deoxidation
2O
3, Al
2O
3(Mn, Cu) S easily forms diameter greater than the super large field trash more than the 5 μ m in big heat input submerged-arc welding seam metal, cause the toughness value instability of weld metal.
Basic ideas of the present invention:
The present invention utilizes the big heat input of the method refinement of oxide metallurgy, and (hot input quantity is 60～150KJ/cm) submerged-arc welding seam metal grains, adds the oxide of cerium in the flux-cored wire material, i.e. cerium oxide.On the one hand in the flux-cored wire material Ce in the Welding Metallurgy process with oxygen, reaction of Salmon-Saxl, easily forming diameter is the ultra-fine Ce oxysulfide particle of 0.4 μ m～0.8 μ m, that common is Ce
xO
xS
xForm as CeOCeS, CeOMnO (Mn, Cu) S, these particle dispersions, is uniformly distributed in the big heat input submerged-arc welding seam metal.
On the other hand, Ce oxysulfide particle has very high heat endurance, the Ce that the solidification front disperse is separated out
xO
xS
xThe migration of precipitation particles energy anchoring, towing high temperature austenite crystal boundary hinders austenite crystal and grows up.On the other hand, Ce oxysulfide particle and ferrite have very little mismatch, and as body-centred cubic CeS, lattice paprmeter is 5.778A, and the lattice paprmeter of alpha ferrite is 2.886A; The lattice paprmeter of CeS just in time is 2 times of alpha ferrite, and alpha ferrite forming core energy barrier on the CeS interface is low, and CeS induces the ferrite forming core as the forming core particle in austenite crystal, play the effect of oxide metallurgy.The third aspect, Rare-Earth Ce is strong deoxidation, desulfurization element, can reduce [O] in the molten steel, [S] content, reduces activity and the solubility of [N], [P], the oxysulfide that Ce deoxidation, desulfurization form can adsorb H, reduces or eliminates the damaging effect of low-melting-point metals such as Sb, Sn.The rare earth cerium that adds among the present invention plays the effect of this three aspect, it not only makes below the grain refinement 15 μ m of big heat input submerged-arc welding seam metal, and can improve the cleanliness factor that big heat is imported the submerged-arc welding seam metal, thereby improve the strength and toughness of big heat input submerged-arc welding seam metal.
The said a kind of medicine core powder that is used for the high-intensity high-tenacity novel medicine core solder wire material of big heat input submerged-arc welding of the present invention is mixed the formula rate such as the following table of each mineral powder, alloyed powder by alloyed powder and mineral powder:
The medicine core powder composition prescription of table 1 high-intensity high-tenacity novel medicine core solder wire material
| Composition | Ratio | Composition | Ratio | Composition | Ratio |
| 99 rutile | 8～12％ | 45 ferrosilicon | 5～7％ | Manganese metal | 4～8％ |
| 99 oxide rare earth ceriums | 2～6％ | 55 molybdenum-irons | 0.5～2％ | 25 ferrotianiums | 0.3～1.0％ |
| Iron powder * | 0～85％ |
Annotate
*: iron powder mainly plays balanced action, and making alloyed powder and mineral powder sum is 100%, and what do not change the performance of flux-cored wire for it.Its purity of the numeral of alloying component front, as 99 rutile, the content of expression rutile is greater than 98%, the content of 99 oxide rare earth ceriums is greater than 99.5%, 45 ferrosilicon represent that Si content is 44%～46%, 55 molybdenum-irons represent that Mo content is that 54%～56%, 25 ferrotianiums represent that Ti content is 24%～26%, and its ratio all is weight percentage.
Example 1:99 rutile, 8.0%; 45 ferrosilicon, 5.0%; Manganese metal, 8.0%; 99 oxide rare earth ceriums, 2.0%; 25 ferrotianiums, 0.3%; 55 molybdenum-irons, 2.0%; Iron powder, 74.7%.
Medicine core weight coefficient is 15%.
Be to carry out three submerged-arc weldings under the condition of 150KJ/cm in the sweating heat input quantity, it is commercially available SJ101 sintered flux that solder flux is joined by institute.Table 2 is the chemical composition and the mechanical property of postwelding weld metal, and the mother metal that welds is pipe line steel X80.
The composition and the mechanical property of table 2 high-intensity high-tenacity novel medicine core solder wire material weld metal
Example 2:
99 rutile, 12%; 45 ferrosilicon, 7%; Manganese metal, 4%; 99 oxide rare earth ceriums, 6%; 25 ferrotianiums, 1%; 55 molybdenum-irons, 0.5%; Iron powder, 69.5%.
Medicine core weight coefficient is 16%.
Be to carry out three submerged-arc weldings under the condition of 60KJ/cm in the sweating heat input quantity, it is commercially available SJ101 sintered flux that solder flux is joined by institute.Table 3 is the chemical composition and the mechanical property of postwelding weld metal, and the mother metal that welds is hull steel E36.
The composition and the mechanical property of table 3 high-intensity high-tenacity novel medicine core solder wire material weld metal
Example 3:
99 rutile, 9%; 45 ferrosilicon, 6%; Manganese metal, 6%; 99 oxide rare earth ceriums, 4%; 25 ferrotianiums, 0.5%; 55 molybdenum-irons, 1%; Iron powder, 73.5%.
Medicine core weight coefficient is 15.5%
Be to carry out three submerged-arc weldings under the condition of 90KJ/cm in the sweating heat input quantity, it is commercially available SJ101 sintered flux that solder flux is joined by institute.Table 3 is the chemical composition and the mechanical property of postwelding weld metal, and the mother metal that welds is pipe line steel X80.
The composition and the mechanical property of table 4 high-intensity high-tenacity novel medicine core solder wire material weld metal
What below provide is the embodiment of the high-intensity high-tenacity novel medicine core solder wire material of big heat input submerged-arc welding:
1). medicine core powder is mixed by alloyed powder and mineral powder, with alloyed powder and mineral powder stir repeatedly, homogenising, carry out flux-cored wire production, the formula rate of each alloyed powder and mineral powder is: 99 rutile 8～12%; 45 ferrosilicon 5～7%; Manganese metal 4～8%; 55 molybdenum-irons 1～3%; 99 oxide rare earth ceriums 3～6%; 25 ferrotianiums 0.5～1.5%; Iron powder 50～80%.
2). the steel band of high-intensity high-tenacity novel medicine core solder wire material is carbon steel H80A, and thickness of strips is 1.0, and when gage of wire was 3.2mm, the width of selecting steel band for use was 16mm; When gage of wire is 4.0mm, the width of selecting steel band for use is 18mm; When gage of wire is 5.0mm, the width of selecting steel band for use is 22mm.The difference of width of steel band does not influence the character of welding wire, satisfies the requirement of different-diameter.
3). the medicine core weight coefficient of high-intensity high-tenacity novel medicine core solder wire material is 15～16%.
4). the alloyed powder of high-intensity high-tenacity novel medicine core solder wire material, the granularity of mineral powder are 60～100 orders, and the mineral powder in the medicine core powder was through 550～600 ℃ of oven dry insulations 1～2 hour, and ferroalloy was through 50～80 ℃ of oven dry insulations 1～2 hour.
5). being drawn into the different high-intensity high-tenacity novel medicine core solder wire material of diameter, is 3.2mm as diameter, 4.0mm, 5.0mm.
The above is preferred embodiment of the present invention, but the present invention should not be confined to the disclosed content of this embodiment.So everyly do not break away from the equivalence of finishing under the spirit disclosed in this invention or revise, all fall into the scope of protection of the invention.
Claims (3)
1. a high tough flux-cored wire material that is used for big heat input submerged-arc welding is characterized in that medicine core powder is mixed by alloyed powder and mineral powder, and the component and the percentage by weight of each alloyed powder and mineral powder are: 99 rutile 8 ~ 12%; 45 ferrosilicon 5 ~ 7%; Manganese metal 4 ~ 8%; 55 molybdenum-irons 0.5 ~ 2%; 99 oxide rare earth ceriums 2～6%; 25 ferrotianiums 0.3～1.0%; Surplus is an iron powder.
2. according to the tough flux-cored wire material of the described height of claim 1, it is characterized in that the steel band of high-intensity high-tenacity flux-cored wire material is carbon steel H08A, thickness of strips is 1.0.
3. according to the tough flux-cored wire material of the described height of claim 1, it is characterized in that the weight coefficient of medicine core is 15 ~ 16%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110108484 CN102152028B (en) | 2011-04-28 | 2011-04-28 | High-strength and high-toughness flux-cored welding wire material for submerged arc welding with high heat input |
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|---|---|---|---|
| CN 201110108484 CN102152028B (en) | 2011-04-28 | 2011-04-28 | High-strength and high-toughness flux-cored welding wire material for submerged arc welding with high heat input |
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| CN102152028A true CN102152028A (en) | 2011-08-17 |
| CN102152028B CN102152028B (en) | 2013-03-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554520A (en) * | 2012-03-07 | 2012-07-11 | 江苏科技大学 | Flux-cored cutting wire for underwater wet-type arc cutting and preparation method thereof |
| CN102581520A (en) * | 2012-04-10 | 2012-07-18 | 山东大学 | Thin-layer slag protecting medicinal powder for welding high strength steel |
| CN104741825A (en) * | 2015-03-09 | 2015-07-01 | 西安理工大学 | Flux-cored wire used for low-alloy ultrahigh-strength steel and manufacturing method thereof |
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|---|---|---|---|---|
| CN1260261A (en) * | 2000-02-15 | 2000-07-19 | 华中理工大学 | High-strength and high-toughness CO2 gas-shielded basic cored welding wire |
| CN1644299A (en) * | 2005-01-24 | 2005-07-27 | 燕山大学 | Build-up welding electrode for composite double-metal big gear re-manufacturing technology |
| CN101497152A (en) * | 2009-02-26 | 2009-08-05 | 山东大学 | Large-diameter flux-cored wire for revolving body or wear-resistant composite board overlaying welding |
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2011
- 2011-04-28 CN CN 201110108484 patent/CN102152028B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1260261A (en) * | 2000-02-15 | 2000-07-19 | 华中理工大学 | High-strength and high-toughness CO2 gas-shielded basic cored welding wire |
| CN1644299A (en) * | 2005-01-24 | 2005-07-27 | 燕山大学 | Build-up welding electrode for composite double-metal big gear re-manufacturing technology |
| CN101497152A (en) * | 2009-02-26 | 2009-08-05 | 山东大学 | Large-diameter flux-cored wire for revolving body or wear-resistant composite board overlaying welding |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554520A (en) * | 2012-03-07 | 2012-07-11 | 江苏科技大学 | Flux-cored cutting wire for underwater wet-type arc cutting and preparation method thereof |
| CN102554520B (en) * | 2012-03-07 | 2013-11-06 | 江苏科技大学 | Flux-cored cutting wire for underwater wet-type arc cutting and preparation method thereof |
| CN102581520A (en) * | 2012-04-10 | 2012-07-18 | 山东大学 | Thin-layer slag protecting medicinal powder for welding high strength steel |
| CN104741825A (en) * | 2015-03-09 | 2015-07-01 | 西安理工大学 | Flux-cored wire used for low-alloy ultrahigh-strength steel and manufacturing method thereof |
| CN104741825B (en) * | 2015-03-09 | 2017-01-25 | 西安理工大学 | Flux-cored wire used for low-alloy ultrahigh-strength steel and manufacturing method thereof |
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|---|---|
| CN102152028B (en) | 2013-03-20 |
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Address after: 430056 Wuhan economic and Technological Development Zone, Hubei, Wuhan, 22MB Patentee after: Wuhan Tiangao Welding Co., Ltd. Address before: 430056 Wuhan economic and Technological Development Zone, Hubei, Wuhan, 22MB Patentee before: Wuhan Tiangao Welding Co., Ltd. |