CN1238154C - Sintering-flux for build-up welding of continuous casting roller and production method thereof - Google Patents
Sintering-flux for build-up welding of continuous casting roller and production method thereof Download PDFInfo
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- CN1238154C CN1238154C CN 01126777 CN01126777A CN1238154C CN 1238154 C CN1238154 C CN 1238154C CN 01126777 CN01126777 CN 01126777 CN 01126777 A CN01126777 A CN 01126777A CN 1238154 C CN1238154 C CN 1238154C
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- welding
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- casting roller
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Abstract
The present invention provides a sintering flux for the build-up weld of a continuous casting roller. The present invention has components according to the weight percentage as following: 20 to 30% of MgO, 20 to 30% of Al2O3, 10 to 35% of CaF2+CaO, 1 to 10% of BaCO3, 1 to 10% of SiO2, 0.5 to 3% of MnO2, 1 to 10% of ZrO2, 1 to 3% of Cr2O3, 0.5 to 2% of Nb2O5, 0.5 to 2% of V2O5, 1 to 5% of Si-Fe, 1 to 5% of Mn-Fe, 0 to 3% of Ti-Fe and 0 to 3% of Ca-Si. The present invention can be matched with 1Cr13 series welding belts. After the materials are mixed, a binder is added to the mixture, and the mixture is conditioned. Then, the mixture is baked and granulated. The mixture is dried before the build-up weld. The flux is used for the build-up weld of the continuous casting roller. Thus, the coldness and heat resistance and the fatigue resistance of a build-up weld layer are obviously enhanced. The present invention has the advantages of convenient manufacture and low cost.
Description
Technical field
The present invention relates to a kind of sintered flux, relate in particular to a kind of sintering-flux for build-up welding of continuous casting roller.
Background technology
The continuous casting roller is the critical component of conticaster; it continuously contacts with the also not solidified high temperature slab in inside; also bear the effect repeatedly of cooling water simultaneously; working condition is very harsh; roll surface is easy to produce cold and hot fatigue crack; oxide etch and wearing and tearing equivalent damage form; serious even cause the roll breakage stopping accident; when the roll surface crackle expands to certain depth; processing must be repaired or scrap to the continuous casting roller; restrict the key factor of conticaster production operational availability the service life of continuous casting roller often; therefore require the continuous casting roller to have enough elevated temperature strengths; high temperature resistance to oxidation corrosive nature and high temperature abrasion resistance, particularly high cold-resistant thermal fatigue property.
Early stage continuous casting roller adopts the solid forged steel roll of 15CrMo, 20CrMo more, and cold-resistant heat fatigue of solid forged steel roll and high temperature oxidation and corrosion poor-performing are so service life is low.Begin domestic and international large-scale iron and steel enterprise from the eighties and generally adopt the built-up welding composite roll, this composite roll is the working lining at roll body surface overlaying one deck excellent performance, working lining can repeated regeneration, and the continuous casting roller is improved significantly service life, greatly reduces production cost.
The built-up welding of continuous casting roller has the band utmost point and two kinds of methods of filament.The characteristics of filament built-up welding are that the serialization degree is higher, pipe silk alloying component is easy to adjust, the pipe silk is simple for production etc., but the homogeneity of ingredients of surfacing layer metal is relatively poor, circular spiral built-up welding overlap joint is more, the roll surface crackle is easy to along the overlapping part expansion, and some big section steel works of US and European adopt this method built-up welding.The advantage of strip surfacing is that built-up welding efficient is higher, and is when adopting vertical built-up welding, favourable to suppressing the ring-type crack Propagation, but the alloy welding is by smelting and rolling making, complex process, composition adjustment be difficulty relatively, and Japan, Germany and more domestic big section steel works all adopt this method built-up welding.Be with the utmost point still be the filament built-up welding all be to adopt the solder flux submerged arc overlay welding.Solder flux mainly is to play stabilising arc, protection, metallurgy and alloying action, simultaneously in order to guarantee the processing performance of automatic surfacing, also must make the molten bath that good flowability is arranged, and make the welding bead moulding good, guarantees to take off automatically slag and reduces pore.At present, solder flux mainly contains two kinds of sintered flux and fysed fluxes.
Chinese patent CN1072366A provides a kind of MgO-Al
2O
3-CaF
2-SiO
2The baked flux of slag system and H1Cr13 alloy welding wire coupling, its principal character is to add alloying elements such as Cr, Ni, Mn, Mo, V in solder flux, so that weld metal alloying, the overlay cladding performance of improving.This kind solder flux is not easy the alloying component of stable control overlay cladding, and is bad with welding that contains alloying elements such as Mo, V, Nb and pipe silk coupling deslag performance.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can improve the continuous casting roller sintering-flux for build-up welding of continuous casting roller in service life.
Sintered flux of the present invention and the 1Cr13 serial alloy welding band coupling that contains alloying elements such as Mo, V, Nb, be used for build-up welding of continuous casting roller, this solder flux not only bead-welding technology performance is good, and has high elevated temperature strength and wearability, excellent cold-and-heat resistent fatigue behaviour, the service life that can obviously improve the continuous casting roller with welding coupling back overlay cladding.
Because the ultimate failure form of continuous casting roller is due to the fatigue crack, therefore, the key that improves continuous casting roller service life is to improve the performance of overlay cladding, particularly the performance of cold-and-heat resistent fatigue crack.
The slag system difference of solder flux, its acid-base value difference, the bead-welding technology performance difference is very big.When flux basicity was big, overlay cladding cracking resistance line performance was good, but the bead-welding technology poor performance; When solder flux acidity was big, the bead-welding technology performance was good, but built-up welding crackle tendency obviously.The present invention adopts MgO-Al
2O
3-CaF
2+ CaO-SiO
2-BaCO
3The neutral meta-alkalescence sintered flux of slag system, the content that can reduce P in the overlay cladding, S prevents to crack, and has bead-welding technology performance preferably simultaneously.
Sintering-flux for build-up welding of continuous casting roller of the present invention, its weight percentages of components is as follows:
MgO：20～30％、Al
2O
3：20～30％、CaF
2+CaO：10～35％、BaCO
3：1～10％、SiO
2：1～10％、MnO
2：0.5～3％、ZrO
2：1～10％、Cr
2O
3：1～3％、Nb
2O
5：0.5～2％、V
2O
5：0.5～2％、Si-Fe：1～5％、Mn-Fe：1～5％、Ti-Fe：0～3％、Ca-Si：0～3％。
Adopt neutral KP1 as binding agent, account for 5～30% of total component.
Among the Mn-Fe Mn greater than 75%, C less than 1%, all the other are Fe; Ti is greater than 60% among the Ti-Fe, and all the other are Fe; Si is greater than 45% among the Si-Fe, and all the other are Fe; Ca is greater than 20% among the Ca-Si, and all the other are Si.
The welding that is complementary with solder flux of the present invention is a 1Cr13 serial alloy welding band.Also can be to add the 1Cr13NiMoVNb welding that high-temperature alloy elements such as Ni, Mo, V, Nb make on the basis of welding to be complementary at 1Cr13.
The percentage by weight of the constituent of 1Cr13NiMoVNb welding is:
C：0.03～0.15％ Si：0.2～0.65％ Mn：0.50～1.50％ Ni：0.50～2.50％Cr：12.0～15.0％ Mo：0.50～1.50％ V：0.10～0.30％ Nb：0.18～0.45％P≤0.015％ S≤0.010％
Wherein, MgO, Al
2O
3, CaF
2+ CaO, SiO
2, BaCO
3Form main slag system, with BaCO
3Replace SiO
2Reduce the content of Si in the overlay cladding, reduce overlay cladding crackle tendency.
The effect of Mn-Fe, Si-Fe, Ti-Fe, Ca-Si is deoxidation.
Add ZrO
2Main purpose is improved deslag performance.Add Cr
2O
3, Nb
2O
5, V
2O
5Main effect is the oxidation that reduces Cr, Nb, V, thereby improves deslag performance.
The production method of solder flux of the present invention is that after each raw material was mixed, the damping of adding binding agent was even, carries out roasting and granulation under 800～900 ℃, dries under 300～400 ℃ of temperature before the built-up welding.
Require the pine dress ratio of solder flux: 1～1.2g/cm
3, moisture content≤0.1% of solder flux, solder flux inclusion content≤0.1%.
The granularmetric composition of solder flux:
| The order number | ＜10 orders | 10～40 orders | 40～60 orders | 〉=60 orders |
| ％ | ≤1 | 80～90 | 10～15 | ≤2 |
Compared with prior art, solder flux of the present invention is applicable to and contains the 1Cr13 serial alloy welding band built-up welding that Mo, V, Nb etc. influence the alloying element of deslag performance, bead-welding technology function admirable not only, it is attractive in appearance to be shaped, no built-up welding defective, and do not increase C and Si, the alloying element scaling loss is few, and control P, S effect is obvious, when guaranteeing the elevated temperature strength of overlay cladding, obviously improved the wear-resistant and cold-resistant thermal fatigue property of overlay cladding, easily manufactured, cost is low.
The specific embodiment
Embodiment 1
The weight percentages of components of solder flux of the present invention is:
MgO：20％、Al
2O
3：22％、CaF
2+CaO：30％、BaCO
3：5％、SiO
2：6％、MnO
2：2％、ZrO
2：6％、Si-Fe：1％、Mn-Fe：3％、Ti-Fe：1％、Ca-Si：1％、Cr
2O
3：1％、Nb
2O
5：1％、V
2O
5：1％
Binding agent is neutral KP1, accounts for 15% of total component.
Mn is 85% among the Mn-Fe, and C is less than 1%, and all the other are Fe; Ti is 65% among the Ti-Fe, and all the other are Fe; Si is 50% among the Si-Fe, and all the other are Fe; Ca is 28% among the Ca-Si, and all the other are Si.
Its production method is: the chemical analysis by each raw material calculates batching, and after mixing, it is even to add the sodium silicate binder damping; adopt comminutor under 820 ℃, to carry out roasting and granulation; guarantee solder flux drying and epigranular, under 330 ℃ of temperature, dry before the built-up welding, promptly make solder flux of the present invention.
The pine dress ratio of prepared solder flux: 1.05g/cm
3, moisture content≤0.1% of solder flux, solder flux inclusion content≤0.1%.
The granularmetric composition of solder flux:
| The order number | ＜10 orders | 10～40 orders | 40～60 orders | 〉=60 orders |
| ％ | 0.5 | 85 | 13.5 | 1 |
Embodiment 2
The weight percentages of components of solder flux of the present invention is:
MgO：20％、Al
2O
3：24％、CaF
2+CaO：32％、BaCO
3：2％、SiO
2：6％、MnO
2：2％、ZrO
2：6％、Si-Fe：1％、Mn-Fe：5％、Ti-Fe：0.5％、Ca-Si：1％、Cr
2O
3：0.5％、Nb
2O
5：0.5％、V
2O
5：0.5％
Binding agent is neutral KP1, accounts for 20% of total component.
Among the Mn-Fe Mn be 87%, C less than 1%, all the other are Fe; Ti is 72% among the Ti-Fe, and all the other are Fe; Si is 65% among the Si-Fe, and all the other are Fe; Ca is 38% among the Ca-Si, and all the other are Si.
Its production method is: the chemical analysis by each raw material calculates batching, and after mixing, it is even to add the sodium silicate binder damping; adopt comminutor under 860 ℃, to carry out roasting and granulation; guarantee solder flux drying and epigranular, under 370 ℃ of temperature, dry before the built-up welding, promptly make solder flux of the present invention.
The pine dress ratio of prepared solder flux: 1.08g/cm
3, moisture content≤0.1% of solder flux, solder flux inclusion content≤0.1%.
The granularmetric composition of solder flux:
| The order number | ＜10 orders | 10～40 orders | 40～60 orders | 〉=60 orders |
| ％ | 0.5 | 88 | 10.2 | 1.3 |
Embodiment 3
Flux component percentage by weight of the present invention is:
MgO：20％、Al
2O
3：28％、CaF
2+CaO：28％、BaCO
3：6％、SiO
2：2％、MnO
2：3％、ZrO
2：6％、Si-Fe：1％、Mn-Fe：1％、Ti-Fe：0.5％、Ca-Si：1％、Cr
2O
3：1.5％、Nb
2O
5：1.5％、V
2O
5：1.5％
Binding agent is neutral KP1, accounts for 28% of total component.
Among the Mn-Fe Mn be 92%, C less than 1%, all the other are Fe; Ti is 91% among the Ti-Fe, and all the other are Fe; Si is 60% among the Si-Fe, and all the other are Fe; Ca is 35% among the Ca-Si, and all the other are Si.
Its production method is: the chemical analysis by each raw material calculates batching, and after mixing, it is even to add the sodium silicate binder damping; adopt comminutor under 900 ℃, to carry out roasting and granulation; guarantee solder flux drying and epigranular, under 400 ℃ of temperature, dry before the built-up welding, promptly make solder flux of the present invention.
The pine dress ratio of prepared solder flux: 1.02g/cm
3, moisture content≤0.1% of solder flux, solder flux inclusion content≤0.1%.
The granularmetric composition of solder flux:
| The order number | ＜10 orders | 10～40 orders | 40～60 orders | 〉=60 orders |
| ％ | 0.9 | 82 | 15.5 | 1.6 |
According to solder flux composition of the present invention, make for test and big production with 9 tons of solder flux, built-up welding test plate (panel) and major diameter ( 355～ 405mm) continuous casting roller in kind are respectively applied for the examination of cold and hot fatigue test and last machine and use respectively.
New wlding coupling overlay cladding obviously improves than yield strength, the contraction percentage of area and the hardness of 1Cr13 welding overlay cladding, 70 ℃ to the 700 ℃ cold and hot fatigue tests 2000 times that circulate, the prior art overlay cladding seriously chaps, crack depth surpasses 15mm, new wlding overlay cladding smooth surface, only micro-crack is arranged, the degree of depth is no more than 2mm.
20 segmental arcs of built-up welding continuous casting roller in kind uses on the machine, and brought up to 5000 stoves more than by original average 2500 stoves a service life, and overlay cladding is high temperature resistant and the cold-and-heat resistent fatigue behaviour obviously improves.
Claims (3)
1. sintering-flux for build-up welding of continuous casting roller, with 1Cr13 be that welding is complementary, it is characterized in that its weight percentages of components is:
MgO：20～30％、Al
2O
3：20～30％、CaF
2+CaO：10～35％、BaCO
3：1～10％、SiO
2：1～10％、MnO
2：0.5～3％、ZrO
2：1～10％、Cr
2O
3：1～3％、Nb
2O
5：0.5～2％、V
2O
5：0.5～2％、Si-Fe：1～5％、Mn-Fe：1～5％、Ti-Fe：0～3％、Ca-Si：0～3％。
2. sintering-flux for build-up welding of continuous casting roller as claimed in claim 1 is characterized in that, as binding agent, it accounts for 5～30% of total component with neutral KP1.
3. sintering-flux for build-up welding of continuous casting roller as claimed in claim 1 is characterized in that, among the Mn-Fe Mn greater than 75%, C less than 1%, all the other are Fe; Ti is greater than 60% among the Ti-Fe, and all the other are Fe; Si is greater than 45% among the Si-Fe, and all the other are Fe; Ca is greater than 20% among the Ca-Si, and all the other are Si.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01126777 CN1238154C (en) | 2001-09-17 | 2001-09-17 | Sintering-flux for build-up welding of continuous casting roller and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01126777 CN1238154C (en) | 2001-09-17 | 2001-09-17 | Sintering-flux for build-up welding of continuous casting roller and production method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1404958A CN1404958A (en) | 2003-03-26 |
| CN1238154C true CN1238154C (en) | 2006-01-25 |
Family
ID=4666782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01126777 Expired - Fee Related CN1238154C (en) | 2001-09-17 | 2001-09-17 | Sintering-flux for build-up welding of continuous casting roller and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1238154C (en) |
Cited By (1)
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| CN102416533B (en) * | 2011-04-27 | 2013-06-26 | 杜荣臻 | Sintered flux for filament swinging submerged arc surfacing of continuous casting roller and preparation method for sintered flux |
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-
2001
- 2001-09-17 CN CN 01126777 patent/CN1238154C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104096987A (en) * | 2014-07-16 | 2014-10-15 | 武汉铁锚焊接材料股份有限公司 | High-basicity and high-tenacity submerged-arc welding flux for oceaneering and preparation method of high-basicity and high-tenacity submerged-arc welding flux |
| CN104096987B (en) * | 2014-07-16 | 2017-01-18 | 武汉铁锚焊接材料股份有限公司 | High-basicity and high-tenacity submerged-arc welding flux for oceaneering and preparation method of high-basicity and high-tenacity submerged-arc welding flux |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1404958A (en) | 2003-03-26 |
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