CN103464929A - Dedicated self-shield flux-cored surfacing welding wire for manufacturing and repairing roll surface of squeeze roller of roller press - Google Patents
Dedicated self-shield flux-cored surfacing welding wire for manufacturing and repairing roll surface of squeeze roller of roller press Download PDFInfo
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- CN103464929A CN103464929A CN2013104235393A CN201310423539A CN103464929A CN 103464929 A CN103464929 A CN 103464929A CN 2013104235393 A CN2013104235393 A CN 2013104235393A CN 201310423539 A CN201310423539 A CN 201310423539A CN 103464929 A CN103464929 A CN 103464929A
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- cored
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Abstract
The invention discloses a dedicated self-shield flux-cored surfacing welding wire for manufacturing and repairing a squeeze roller of a roller press. The dedicated self-shield flux-cored surfacing welding wire comprises a steel belt layer and a flux-cored layer; the dedicated self-shield flux-cored surfacing welding wire is characterized in that alloy elements of metal powders added in the flux-cored layer in mass percentage are respectively 70%-80% of ferrochrome, 1%-5% of ferromanganese, 1%-5% of ferrosilicon, 1%-3% of ferrovanadium, 1%-3% of ferromolybdenum, 0.5%-2% of rare earth and 8%-12% of graphite. The dedicated self-shield flux-cored surfacing welding wire disclosed by the invention has excellent wear-resisting performance and anti-strip performance, is convenient to weld and does not need any medium protection, the applicability of a welding wire is greatly increased, conditions are provided for realizing automatic welding of a large workpiece, the production efficiency is increased, and the service life of a roll surface of the squeeze roller of the roller press is prolonged.
Description
Technical field
The present invention relates to a kind of welding material, the welding wire that particularly manufacture of roller press squeeze roll roll surface and reparation built-up welding are used.
Background technology
Roll squeezer is a kind of milling equipment of brittle material, is applicable to pulverizing cement grog, granulated blast furnace slag, cement raw material, as lime stone, sandstone and shale etc., and gypsum, coal, quartz sand and iron ore etc.Mainly, by the surface of compression roller, material is carried out to attrition crushing.In attrition crushing process at compression roller to material, the extruding roll surface will stand periodic heavily stressed abrasive wear and fatigue rupture, finally causes the compression roller cisco unity malfunction.Therefore, require the roll surface overlay cladding that Abrasive Resistance of Stubble-cleaning and higher hardness are preferably arranged.General Requirements hardness, more than HRC55, and has toughness preferably, in order to avoid heavy wear or peeling phenomenon appear in roll surface.
Contain a large amount of M in high-chromium cast iron-type hard material tissue
7c
3the type carbide, there is wear-resisting, heat resistance preferably, especially have more practical value under normal temperature and high temperature impact abrasive conditions, simultaneously, because it is cheap, be widely used in the grinding of the industries such as mine, metallurgy, machinery to brittle material, especially be applied to roller press squeeze roll manufacture and reparation.These high-chromium cast iron-type hard materials, after wear out failure, can adopt the method that the flux-cored wire built-up welding is repaired to recover roll surface size and performance at present usually.In the roll surface wear-resisting built-up welding is repaired, mostly select the welding of Fe-Cr-C type surfacing welding alloy.Because contain a large amount of nascent and eutectic carbides in its tissue, have higher wearability.Flux-cored wire is compared stick electrode and is had that efficiency is high, forming, the advantage such as little of splashing.And self-protection flux-cored wire more can be realized without the adscititious gases device, at the welding bead surface micro-slag of formation or without slag, thus the trouble of in the time of also can saving multi-pass welding, striking slag.Therefore, develop a kind of well behaved micro-slag type self-protection flux-cored wire, make deposited metal there is high rigidity, high-wearing feature, have great importance service life thereby extend wear part.
Summary of the invention
The invention provides and a kind ofly have without gas shield, after built-up welding, welding bead hardness is high, and the surface roller press squeeze roll manufacture of only having a small amount of micro-slag with repair special-purpose self-shield medicine core surfacing welding wire.
For achieving the above object, technical scheme of the present invention is:
A kind of roller press squeeze roll manufacture and the special-purpose self-shield medicine core surfacing welding wire of reparation, comprise steel belt layer and drug core layer, it is characterized in that:
The metal medicinal powder added in described drug core layer, the quality percentage composition of each alloying element is: ferrochrome 70 ~ 80%, ferromanganese 1 ~ 5%, ferrosilicon 1 ~ 5%, vanadium iron 1 ~ 3%, molybdenum-iron 1 ~ 3%, rare earth 0.5 ~ 2%, graphite 8 ~ 12%.
A kind of roller press squeeze roll manufacture and the manufacture craft of repairing special-purpose self-shield medicine core surfacing welding wire is characterized in that comprising the following steps:
(1) after the alloyed powder of ferrosilicon, ferrochrome, ferromanganese is carried out to Passivation Treatment, then joined powder;
(2) steel band is rolled into U-shaped;
(3) medicinal powder is packed in steel belt layer;
(4) inclusion is tight;
(5) drawing moulding;
(5) be drawn into final products.
In described step (1), the passivation process of ferrosilicon, ferrochrome and ferromanganese is heat treatment, and heat treatment temperature is respectively: 560 ℃, 320 ℃ and 725 ℃, temperature retention time is 1h.
The special-purpose self-shield medicine of this roll squeezer core surfacing welding wire, have excellent anti-wear performance and antistrip performance, convenient welding; without any media protection; greatly improve the applicability of welding wire, for the realization of the automatic welding of large workpiece provides condition, improved production efficiency.The inventor has adopted the online REPAIR WELDING of this kind of welding wire for roll surface of roller press, the service life of greatly having improved roll surface.
The accompanying drawing explanation
Fig. 1 is the metallographic structure exterior view of deposited metal;
Fig. 2 is the metallographic structure side view of deposited metal;
Fig. 3 is the XRD analysis figure of deposited metal;
Fig. 4 is the SEM figure of primary carbide and eutectic carbide in deposited metal;
Fig. 5 is the energy spectrum analysis figure of primary carbide in deposited metal;
Fig. 6 is the energy spectrum analysis figure of eutectic carbide in deposited metal;
Fig. 7 is the joint portion bitmap of flux-cored wire and matrix;
Fig. 8 is the wearability curve of test button;
Fig. 9 does not contain the specimen surface appearance figure of rare earth flux-cored wire overlay cladding;
Figure 10 is the specimen surface appearance figure containing rare earth flux-cored wire overlay cladding.
In figure, Q235 steel wearability curve 1, containing rare earth deposited metal wearability curve 2, containing rare earth deposited metal wearability curve 3.
The specific embodiment
Flux-cored wire of the present invention is comprised of steel belt layer and drug core layer, steel belt layer adopts H08A mild steel steel band, the metal medicinal powder added in drug core layer, the quality percentage composition of each alloying element is: ferrochrome 70 ~ 80%, ferromanganese 1 ~ 5%, ferrosilicon 1 ~ 5%, vanadium iron 1 ~ 3%, molybdenum-iron 1 ~ 3%, rare earth 0.5 ~ 2, graphite 8 ~ 12%.
The technological process of production of this flux-cored wire is:
(1) after the alloyed powder of ferrosilicon, ferrochrome, ferromanganese is carried out to Passivation Treatment, then joined powder;
(2) steel band is rolled into U-shaped;
(3) medicinal powder is packed in steel belt layer;
(4) inclusion is tight;
(5) drawing moulding;
(5) be drawn into final products.
Wherein, in step (1), the passivation process of ferrosilicon, ferrochrome, ferromanganese is heat treatment, and to prevent the alloy loss excessive without element in actual welding, passivation technology is in Table 1:
Table 1: the passivation technology of different-alloy powder
| Alloyed powder | Ferrochrome | Ferromanganese | Ferrosilicon |
| Heating-up temperature ℃ (insulation 1h) | 560 | 320 | 725 |
Welding wire will guarantee that Bao Fenliang enriches, welding wire surface is clean.
While applying this flux-cored wire, utilize YM600KH type welding machine to carry out manual build up welding on Q235 mild steel steel plate, built-up welding is 3 layers altogether, and its welding condition is as shown in table 2.
Table 2: welding condition
| Electric current/A | Gage of wire/mm | Electric power polarity | Stem elongation degree/mm | Voltage/V |
| 250~400 | Ф2.8 | DC reverse connection | 25~30 | 28~35 |
To at above-mentioned Distribution of Hard-Face-Welding, carrying out performance measurement, all can obtain following result after built-up welding:
A. deposited metal metallographic structure and XRD analysis
Metallographic structure is observed: by bead weld specimen, successively at emery wheel, polishing, polishing on sand paper then, with 4% nitric acid alcohol corrosion, are corroded 5 ~ 6s in corrosive liquid, and first water rinses, then cleans with alcohol, and last electricity consumption dries up.In its microscopic structure of XJG-05 metallography microscope Microscopic observation.
XRD analysis: adopt the D/max-2500/PC X-ray diffractometer to carry out material phase analysis to bead weld specimen, to determine its phase composition and carbide.
Shown in Fig. 1 and Fig. 2, be respectively metallographic structure surface and the side view of deposited metal; Shown in Fig. 3, be the XRD analysis figure of deposited metal.From Fig. 1, Fig. 2 and Fig. 3, analyzed, the deposited metal microscopic structure is mainly martensite+a small amount of retained austenite+carbide.Mainly separate out M in deposited metal
7c
3the type carbide, M
7c
3the type primary carbide has the hexagonal prism structure, and surface is polygon, and the direction of growth is grown to mother metal by the built-up welding surface.Carbide surface and side are carried out to micro-hardness testing, and the microhardness mean value of known carbide surface is HV1783, and the microhardness of carbide side is HV1127.Deposited metal surface average hardness is HRC63, and the carbide of high rigidity has played the effect of wear-resisting skeleton, greatly improves the wearability of deposited metal.In addition, added appropriate molybdenum-iron and vanadium iron in flux-cored wire, can find out in X ray and form Mo in deposited metal
2c and V
2c, these carbide can improve the wearability of deposited metal, and remaining Mo and V are solidly soluted in matrix can play solution strengthening effect.
B.SEM and EDS analyze
Shown in Fig. 4, be the SEM figure of primary carbide in deposited metal and eutectic carbide, wherein primary carbide is the bulk polygon, and eutectic carbide is worm shape or little bulk, is centered around primary carbide growth on every side, and recording its microhardness is HV830.
Shown in Fig. 5 and Fig. 6, be respectively the energy spectrum analysis figure of primary carbide and eutectic carbide in deposited metal, this energy spectrogram can be found out in conjunction with X ray in Fig. 3, primary carbide and eutectic carbide are all (Fe, Cr)
7c
3the composite carbon compound, its main difference is because the ratio of Cr and Fe is different, this is because at the deposited metal early solidification, primary carbide has consumed a large amount of Cr and C, therefore, the concentration of solidifying later stage Cr starts to descend, and causes the chromium content in eutectic carbide lower.Primary carbide is all the wear-resisting phase in deposited metal with eutectic carbide, again hard crisp phase simultaneously, therefore easily peel off in wear process, should control flux-cored wire composition and welding procedure so that carbide quantity, size, distribution reach the requirement of actual welding part.
C. the binding site of deposited metal
Shown in Fig. 7, be the joint portion bitmap of flux-cored wire and matrix, with the weldering of this medicine core, than built-up welding on the Q235 steel plate, its deposited metal is combined with matrix well, the defect such as have no pore, be mingled with.
D. the abrasion test of deposited metal
Carry out easy wearability experiment on endless belt emery cloth tester for friction between, respectively with line cut formed objects containing rare earth Distribution of Hard-Face-Welding (being Distribution of Hard-Face-Welding of the present invention), containing each 6, rare earth Distribution of Hard-Face-Welding and Q235 steel sample.Record the weight of good each sample before experiment, during experiment, sample is applied the pressure of 0.98N, every 10min shuts down with scales/electronic balance weighing once, and experiment is weighed 6 times continuously, and 6 samples are averaged, and draws wearability curve as shown in Figure 8.Containing rare earth flux-cored wire overlay cladding with containing the wearing and tearing specimen surface appearance of rare earth flux-cored wire overlay cladding as shown in Figure 9 and Figure 10.
Shown in Fig. 8,1 is Q235 steel wearability curve, 2 for not containing rare earth deposited metal wearability curve, 3 for containing rare earth deposited metal wearability curve, by three wearability curves, can be found out, in the wearing and tearing incipient stage, not little with the wear extent difference that contains the rare earth Distribution of Hard-Face-Welding containing the rare earth Distribution of Hard-Face-Welding, and, after wearing and tearing 30min, start to be less than the Distribution of Hard-Face-Welding that does not contain rare earth containing rare earth Distribution of Hard-Face-Welding wear extent, shown in Fig. 9 and Figure 10, respectively the surperficial appearance figure that does not contain rare earth flux-cored wire overlay cladding sample and contain rare earth flux-cored wire overlay cladding sample, containing in the Distribution of Hard-Face-Welding of rare earth, darker ditch dug with a plow is not arranged, polishing scratch is deep, and more carbide peeling phenomenon appears, therefore just started wear extent less, and peeling off along with carbide, wear extent starts to increase, and containing rare earth Distribution of Hard-Face-Welding surface pears ditch and polishing scratch not obvious, only has a small amount of fritter carbide peeling phenomenon, this is because rare earth oxide energy refinement carbide and elementary organization, making carbide be small and dispersed distributes, thereby its wearability is improved.
Can reach a conclusion thus:
(1) deposited metal surface average hardness is HRC63, and its microscopic structure is mainly martensite+retained austenite+M
7c
3the type carbide;
(2) primary carbide is hexa-prism, mainly along overlay cladding, to mother metal, grows, and case hardness is HV1783.64, and side is HV1127.96, and eutectic carbide is grown around being centered around primary carbide, and its hardness is HV830;
(3) deposited metal is combined with mother metal well, without obvious pore, the defect such as be mingled with;
(4) after 0.98N pressure, wearing and tearing 60min, the wear extent that contains the rare earth oxide deposited metal is less than and does not add rare earth oxide flux-cored wire deposited metal, 14 times of left and right that the relative wear resistance of deposited metal is the Q235 steel.
In sum, this self-shielded welding wire has excellent anti-wear performance and antistrip performance, and convenient welding, without any media protection, has improved the applicability of welding wire greatly, for the realization of the automatic welding of large workpiece provides condition.
Claims (3)
1. a roller press squeeze roll roll surface is manufactured and repairs special-purpose self-shield medicine core surfacing welding wire, comprises steel belt layer and drug core layer, it is characterized in that:
The metal medicinal powder added in described drug core layer, the quality percentage composition of each alloying element is: ferrochrome 70 ~ 80%, ferromanganese 1 ~ 5%, ferrosilicon 1 ~ 5%, vanadium iron 1 ~ 3%, molybdenum-iron 1 ~ 3%, rare earth 0.5 ~ 2, graphite 8 ~ 12%.
2. a kind of roller press squeeze roll roll surface according to claim 1 is manufactured and the manufacture craft of repairing special-purpose self-shield medicine core surfacing welding wire, it is characterized in that comprising the following steps:
(1) after the alloyed powder of ferrosilicon, ferrochrome, ferromanganese is carried out to Passivation Treatment, then joined powder;
(2) steel band is rolled into U-shaped;
(3) medicinal powder is packed in steel belt layer;
(4) inclusion is tight;
(5) drawing moulding;
(6) be drawn into final products.
3. a kind of roller press squeeze roll roll surface according to claim 2 is manufactured and the manufacture craft of repairing special-purpose self-shield medicine core surfacing welding wire, it is characterized in that:
In described step (1), the passivation process of ferrosilicon, ferrochrome and ferromanganese is heat treatment, and heat treatment temperature is respectively: 560 ℃, 320 ℃ and 725 ℃, temperature retention time is 1h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310423539.3A CN103464929B (en) | 2013-09-17 | 2013-09-17 | Roller press squeeze roll roll surface manufactures and repairs special self-shield medicine core surfacing welding wire |
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|---|---|---|---|
| CN201310423539.3A CN103464929B (en) | 2013-09-17 | 2013-09-17 | Roller press squeeze roll roll surface manufactures and repairs special self-shield medicine core surfacing welding wire |
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| CN103464929B CN103464929B (en) | 2016-03-02 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104084750A (en) * | 2014-07-10 | 2014-10-08 | 河北瑞兆激光再制造技术有限公司 | Submerged-arc welding repair method after alkali production squeezing roller is worn |
| 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 |
| CN106041361A (en) * | 2016-08-03 | 2016-10-26 | 湘潭大学 | Pre-prepared alloy powder type flux-cored wire and self-protection open arc surfacing welding method of high-chromium alloy |
| CN114571132A (en) * | 2021-12-14 | 2022-06-03 | 鞍山冶金集团工业有限公司鞍山三炼钢分公司 | Self-protection flux-cored wire for extrusion roller transition layer |
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| CN100999042A (en) * | 2006-12-18 | 2007-07-18 | 燕山大学 | Pile up welding flux cored wire used for remanufacturing compound bimetal large special wear resistant parts |
| CN102019520A (en) * | 2010-12-08 | 2011-04-20 | 燕山大学 | Special flux-cored wire for carrying out preheating-free and heat treatment-free surfacing repair and reproducing on shaft and gear parts |
| CN102069317A (en) * | 2010-12-08 | 2011-05-25 | 燕山大学 | Self-protection flux-cored wire for rare earth type high-chromium cast iron by open arc |
| CN102416534A (en) * | 2011-04-27 | 2012-04-18 | 杜荣臻 | Gas-protected surfacing flux-cored welding wire for surfacing |
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2013
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100999042A (en) * | 2006-12-18 | 2007-07-18 | 燕山大学 | Pile up welding flux cored wire used for remanufacturing compound bimetal large special wear resistant parts |
| CN102019520A (en) * | 2010-12-08 | 2011-04-20 | 燕山大学 | Special flux-cored wire for carrying out preheating-free and heat treatment-free surfacing repair and reproducing on shaft and gear parts |
| CN102069317A (en) * | 2010-12-08 | 2011-05-25 | 燕山大学 | Self-protection flux-cored wire for rare earth type high-chromium cast iron by open arc |
| CN102416534A (en) * | 2011-04-27 | 2012-04-18 | 杜荣臻 | Gas-protected surfacing flux-cored welding wire for surfacing |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104084750A (en) * | 2014-07-10 | 2014-10-08 | 河北瑞兆激光再制造技术有限公司 | Submerged-arc welding repair method after alkali production squeezing roller is worn |
| 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 |
| CN106041361A (en) * | 2016-08-03 | 2016-10-26 | 湘潭大学 | Pre-prepared alloy powder type flux-cored wire and self-protection open arc surfacing welding method of high-chromium alloy |
| CN114571132A (en) * | 2021-12-14 | 2022-06-03 | 鞍山冶金集团工业有限公司鞍山三炼钢分公司 | Self-protection flux-cored wire for extrusion roller transition layer |
| CN114571132B (en) * | 2021-12-14 | 2023-07-18 | 鞍山冶金集团工业有限公司鞍山三炼钢分公司 | Self-protection flux-cored wire for transition layer of squeeze roller |
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| CN103464929B (en) | 2016-03-02 |
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