CN104002018A - Method for repairing open arc welding and surfacing of continuous casting roller of continuous casting fan-shaped section - Google Patents
Method for repairing open arc welding and surfacing of continuous casting roller of continuous casting fan-shaped section Download PDFInfo
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- CN104002018A CN104002018A CN201410283642.7A CN201410283642A CN104002018A CN 104002018 A CN104002018 A CN 104002018A CN 201410283642 A CN201410283642 A CN 201410283642A CN 104002018 A CN104002018 A CN 104002018A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
- B23K9/044—Built-up welding on three-dimensional surfaces
- B23K9/046—Built-up welding on three-dimensional surfaces on surfaces of revolution
- B23K9/048—Built-up welding on three-dimensional surfaces on surfaces of revolution on cylindrical surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
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- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
A method for repairing open arc welding and surfacing of a continuous casting roller of a continuous casting fan-shaped section includes the following steps of (1) welding material selection, (2) open arc welding and surfacing processing and (3) roller surface welding. By means of the method for repairing open arc welding and surfacing, a surfacing layer of the continuous casting roller has high anti-stripping performance, good abrasion resistance, good fatigue resistance and good machinable performance, production efficiency is high due to surfacing, the requirement for multiple times of surfacing repairing can be met, and the service life of the continuous casting roller after surfacing repairing is not shorter than that of an original roller.
Description
Technical field
The present invention relates to continuous casting installation for casting, particularly continuous casting segment Continuous Casting Rolls open arc welding build-up welding repair method.
Background technology
The working condition that Continuous Casting Rolls uses is very severe, the surface temperature that continuous casting billet comes out to fan-shaped section from crystallizer is 850～1000 DEG C of left and right, under the acting in conjunction of continuous casting billet and cold water spray water, high temperature utmost point cold-peace extrusion abrasion is born on Continuous Casting Rolls surface, roller turn one perimeter surface temperature changes between 240～480 DEG C, and roll surface alternately bears and draws, compression.Continuous Casting Rolls, in contacting with high temperature strand, is subject to the cooling fast of high-pressure cooling water, bears the serious cold and hot fatigue effect that cold cycling causes.When Continuous Casting Rolls is subject to mechanical stress effect, also bear the thermal stress effect of high temperature strand.In addition, roll surface contacts with high temperature strand, is subject to the corrosiveness of high-temperature oxydation and cooling water, causes oxidation and corrosion squama wrinkle, the problems such as roll surface wearing, and then have a strong impact on slab quality and serviceability.
Build-up welding of continuous casting roller manufacture at present and reparation mainly contain submerged arc overlay welding welding, flux-cored wire, self-shield welding.
Submerged welding process more complicated (needing weld preheating, post weld heat treatment), factory need increase Equipment for Heating Processing.Face of weld is prone to crackle, and service life is short, inadaptable repeatedly reparation.
Summary of the invention
The object of the present invention is to provide a kind of continuous casting segment Continuous Casting Rolls open arc welding build-up welding repair method, make build-up welding of continuous casting roller layer will there is higher antistrip performance, good abrasion resistance properties and fatigue resistance; Good processability; Built-up welding has higher production efficiency, can meet repeatedly built-up welding and repair requirement; Continuous Casting Rolls after built-up welding is repaired, is not less than former roller its service life.
For achieving the above object, technical scheme of the present invention is:
A kind of continuous casting segment Continuous Casting Rolls open arc welding build-up welding repair method, comprises the steps:
1) welding material is selected
Select suitable welding material, wherein, transition zone select 430-O (Beijing Ao Bang welding material Co., Ltd, WA group of Britain (Welding Alloys Group),
welding wire; Working lining select 414N-O (Beijing Ao Bang welding material Co., Ltd, WA group of Britain (Welding Alloys Group),
welding wire;
2) before open arc welding built-up welding, prepare
2.1 Continuous Casting Rolls pre weld inspections, check whether roll surface has greasy dirt, corrosion, crackle;
2.2 striking circles are made
Striking loop material is selected
round steel, striking circle cylindrical is than Continuous Casting Rolls nominal size tube reducing 10～12mm, and striking lap welding is casting roll end face in succession, and the difference of height of striking circle cylindrical and roll surface is not more than 0.5mm; Adopt J502 welding rod (GB) welding, core diameter
use direct current-direct current (AC-DC) welding, welding current 180A～200A, fusion length is 10～15mm, spacing distance 50～60mm, striking circle and Continuous Casting Rolls end face gap are not more than 0.5mm;
2.3 layer designs
2.3.1 new roller layer design,
The welding number of plies, new roller ground floor is that transition zone layer thickness is 3～5mm, adopts 430N-O welding wire, gage of wire
the second layer is that working lining layer thickness is 4～6mm, adopts 414N-O welding wire, gage of wire
the 3rd layer is working lining and allowance, and layer thickness is 5～7mm, adopts 414N-O welding wire, and gage of wire is
2.3.2 multiplexing roller layer design,
Below multiplexing roller sizing reduction 3mm, layer thickness is 5～7mm, adopts 414N-O welding wire, and gage of wire is
Multiplexing roller sizing reduction 3～8mm, the Continuous Casting Rolls weldering ground floor layer thickness after tube reducing is 5～7mm, adopts 414N-O, gage of wire
second layer layer thickness is 6～8mm, adopts 414N-O, gage of wire
Multiplexing roller sizing reduction is greater than 8mm, and layer design is with new roller layer design.
3) roll surface welding
Welding parameter: Continuous Casting Rolls roller footpath Φ 140～Φ 290mm, electric current 240～380A, voltage 20～30V, welding wire connect positive pole, stem elongation degree 25～35mm, roll surface speed Φ × 0.18, torch swinging width 25～35mm, corresponding weld width 20～40mm, 2.4～2.6 ms/min of swing speed, welding bead amount of lap 8～14mm, 5 °～10 ° of angle of welding guns;
Continuous Casting Rolls direction of rotation is by sideway swivel in lateral; When welding, welding torch position is along with roller footpath size variation, and more mini gas torch centre-to-centre spacing roller vertical centre distance is far away in roller footpath; Angle of welding gun should be reverse and the direction of rotation of roller, under the constant condition in welding gun center, roller footpath more mini gas torch more to the reverse inclination of welding direction.
Further, described Continuous Casting Rolls basic material is 21CrMoV.
Again, there are φ 140, φ 180, φ 230, φ 260, φ 290 in Continuous Casting Rolls roller of the present invention footpath.
The present invention adopts open arc welding, and open arc welding wire deposition rate is high, and open arc welding is without fusing solder flux.In the time that welding current is 400A, open arc welding can reach 8Kg/h.Open arc welding is slow to the hot input speed of mother metal, and because the slag of face of weld in welding process is thin, heat is easy to distribute, be suitable for built-up welding hollow or
following solid roll, in the time that welding current is 400A, weld heat input is 1.8KJ/mm.The molten stream of open arc welding welding observable, is easy to control adjustment welding procedure.
Continuous Casting Rolls wearability and the thermal fatigue resistance crackle of open arc non gas shielded welding are better; be mainly because on the one hand: open arc welding material drops to minimum by C content; with N for C; time the strong nitride element such as N and Cr form small and dispersed and be distributed in the nitride in crystal grain; effectively eliminate C and reacted the chromium stripping section forming with Cr at crystal boundary, improved the uniformity of toughness, corrosion resistance, thermal fatigue resistance and the hardness of layer.On the other hand, the element such as Ni, Mo in open arc welding material has improved layer and temper resistance, elevated temperature strength and toughness with different mechanism, thereby improves high temperature abrasion resistance and the heat fatigue ability of layer.
In the inventive method design:
A. wlding is selected
(transition zone is selected 430-O, and metallographic structure is ferrite+martensite+troostite, is applicable to multiple low-alloy steel and medium and low carbon steel, and welding performance is good, can multiple-bead deposit to select the welding wire identical with overlay cladding; Working lining is selected 414N-O, and metallographic structure is martensite, the features such as its performance has that intensity is high, good toughness, wear-resistant, corrosion-resistant, thermal fatigue resistance, arc stability, de-slag easily, can obtain the uniform overlay cladding of chemical composition; Beijing Ao Bang welding material Co., Ltd, WA group of Britain (Welding Alloys Group)), as the more or area of counting should carry out more greatly repair welding on open arc welding surfacing equipment, now welding current (A) and weldingvoltage (V) should be reduced to 10～15%, the pit of counting individually can adopt TIG mode to carry out repair welding.
B. pre-welding treatment
Before weldering, the oil of roller surfaces, rust should be cleaned to polishing clean, clean greasy dirt and can adopt 0# diesel oil, rust staining can adopt wire brush or pneumatic wire brush, while using pneumatic wire brush, air pressure can be adjusted to 3～4kg, when startup, should increase gradually air inflow, and check that whether each interface is firm, while using diesel oil to clean, should avoid naked light, when as lower in temperature before weldering, roller should be carried out to preheating, 150 DEG C of preheat temperatures.
C. after welding treatment
Generally can not process, as lower in temperature (room temperature is lower than 10 DEG C) can do slow cooling processing, put into incubator with asbestos cloth or by roller.
Beneficial effect of the present invention:
1. the present invention is compared with existing submerged welding process, and work simplification, does not need to adopt the heat treatment such as weld preheating and post weld heat treatment means when roll surface built-up welding, and Continuous Casting Rolls increases service life, can repeatedly repair.
2. the inventive method has ensured working lining thickness, can retain in most cases transition zone while being conducive to again roll off the production line reparation again.(without by transition zone turning)
3. the Continuous Casting Rolls of heap postwelding is generally enhanced about more than once service life.
4. reduce use cost, improved production efficiency.
5. heap postwelding Continuous Casting Rolls has the uniformity of good toughness, corrosion resistance, fatigue resistance and hardness.
Brief description of the drawings
Fig. 1 is the new roller layer of the present invention design diagram.
Fig. 2 is the multiplexing roller layer of the present invention design diagram.
Fig. 3 is that roller direction of rotation of the present invention and electrode move schematic diagram.
Fig. 4 is welding torch position schematic diagram of the present invention.
Detailed description of the invention
Referring to Fig. 1～Fig. 4, a kind of continuous casting segment Continuous Casting Rolls open arc welding build-up welding repair method of the present invention, comprises the steps:
1. welding material is selected
Select suitable welding material, wherein, transition zone is selected 430-O,
welding wire; Working lining is selected 414N-O,
welding wire.
2. open arc welding bead-welding technology
2.1 Continuous Casting Rolls pre weld inspections, check whether roll surface has greasy dirt, corrosion, crackle.
2.2 striking circles are made
Striking loop material is selected low-carbon (LC) φ 10mm round steel, and striking circle 30 cylindricals are than Continuous Casting Rolls 10 nominal size tube reducing 11mm, and striking lap welding is casting roll end face in succession, and the difference of height of striking circle cylindrical and roll surface is not more than 0.5mm; Adopt the welding of J502 welding rod, core diameter
use direct current-direct current (AC-DC) welding, welding current 180A～200A, fusion length is 10～15mm, spacing distance 50～60mm, striking circle and Continuous Casting Rolls end face gap are not more than 0.5mm.
2.3 layer designs
2.3.1 new roller layer design,
Referring to Fig. 1, the welding number of plies, new roller ground floor is that transition zone layer thickness is 2mm, adopts 430N-0 welding wire, diameter welding wire
the second layer is that working lining layer thickness is 3mm, adopts 414N-0, gage of wire
the 3rd layer is working lining and allowance, and layer thickness is 3mm～3.5mm, adopts 414N-0 welding wire, and gage of wire is
2.3.2 multiplexing roller layer design,
Referring to Fig. 2, below multiplexing roller sizing reduction 3mm, layer thickness is 5～7mm, adopts 414N-O welding wire, and gage of wire is
Multiplexing roller sizing reduction is greater than 10mm, should first adopt 430-O welding wire by the Continuous Casting Rolls weldering after tube reducing, and tube reducing 9～10mm, then uses 414N-O welding wire, welds two layers of working lining, every layer thickness 5～7mm.
3. roll surface welding
Welding parameter: roller footpath Φ 140～Φ 290mm, electric current 240～380A, voltage 20～30V, welding wire connect positive pole, stem elongation degree 25～35mm, roll surface speed Φ × 0.18, swing width 25～35mm, corresponding weld width 20～40mm, 2.5 ms/min of swing speed, swing the time of staying: 0.2 second, left 0.4 right side, 22 beats/min of corresponding hunting frequencies, step distance 25～35mm, welding bead amount of lap 8～14mm, 0.04～0.07 m/min of stepping rate, angle of welding gun α=5 °～10 °.
Welding gun X-axis parameter arranges: speed of travel 2.2m/min, left off-position put that 15mm, right off-position put 15mm, 0.4min between the left stopping time, 0.2min, stepping rate 0.06m/min, step distance 28～30mm, step direction POS between the right stopping time.
Welding gun Y-axis parameter arranges: speed of travel 2.2m/min, step direction POS, step switch: close step distance 28～30mm.
Referring to Fig. 3, Fig. 4, electrode 20 moving directions are for moving from left to right, and amplitude of fluctuation is 30mm; Continuous Casting Rolls 10 direction of rotation are by sideway swivel in lateral; When welding, welding gun 40 positions are along with roller footpath size variation, and more mini gas torch centre-to-centre spacing roller vertical centre distance is far away in roller footpath; Angle of welding gun should be reverse and the direction of rotation of roller, under the constant condition in welding gun center, roller footpath more mini gas torch more to the reverse inclination of welding direction.
Claims (3)
1. a continuous casting segment Continuous Casting Rolls open arc welding build-up welding repair method, comprises the steps:
1) welding material is selected
Select suitable welding material, wherein, transition zone is selected 430-O,
welding wire; Working lining is selected 414N-O,
welding wire;
2) before open arc welding built-up welding, prepare
2.1 Continuous Casting Rolls pre weld inspections, check whether roll surface has greasy dirt, corrosion, crackle;
2.2 striking circles are made
Striking loop material is selected
round steel, striking circle cylindrical is than Continuous Casting Rolls nominal size tube reducing 10～12mm, and striking lap welding is casting roll end face in succession, and the difference of height of striking circle cylindrical and roll surface is not more than 0.5mm; Adopt the welding of J502 welding rod, core diameter
use direct current-direct current (AC-DC) welding, welding current 180A～200A, fusion length is 10～15mm, spacing distance 50～60mm, striking circle and Continuous Casting Rolls end face gap are not more than 0.5mm;
2.3 layer designs
2.3.1 new roller layer design,
The welding number of plies, new roller ground floor is that transition zone layer thickness is 3～5mm, adopts 430N-O welding wire, gage of wire
the second layer is that working lining layer thickness is 4～6mm, adopts 414N-O welding wire, gage of wire
the 3rd layer is working lining and allowance, and layer thickness is 5～7mm, adopts 414N-O welding wire, and gage of wire is
2.3.2 multiplexing roller layer design,
Below multiplexing roller sizing reduction 3mm, layer thickness is 5～7mm, adopts 414N-O welding wire, and gage of wire is
Multiplexing roller sizing reduction 3～8mm, the Continuous Casting Rolls weldering ground floor layer thickness after tube reducing is 3～5mm, adopts 414N-O, gage of wire
second layer layer thickness is 5～7mm, adopts 414N-O, gage of wire
Multiplexing roller sizing reduction 8～12mm, then weld the 3rd layer, layer thickness is 5～7mm, adopts 414N-O welding wire, gage of wire
3) roll surface welding
Welding parameter: Continuous Casting Rolls roller footpath Φ 140～Φ 290mm, electric current 240～380A, voltage 20～30V, welding wire connect positive pole, stem elongation degree 25～35mm, roll surface speed Φ × 0.18, torch swinging width 25～35mm, corresponding weld width 20～40mm, 2.4～2.6 ms/min of swing speed, welding bead amount of lap 8～14mm, 5 °～10 ° of angle of welding guns;
Continuous Casting Rolls direction of rotation is by sideway swivel in lateral; When welding, welding torch position is along with roller footpath size variation, and more mini gas torch centre-to-centre spacing roller vertical centre distance is far away in roller footpath; Angle of welding gun should be reverse and the direction of rotation of roller, under the constant condition in welding gun center, roller footpath more mini gas torch more to the reverse inclination of welding direction.
2. continuous casting segment Continuous Casting Rolls open arc welding build-up welding repair method as claimed in claim 1, is characterized in that, described Continuous Casting Rolls basic material is 21CrMoV.
3. continuous casting segment Continuous Casting Rolls open arc welding build-up welding repair method as claimed in claim 1 or 2, is characterized in that, there are φ 140, φ 180, φ 230, φ 260, φ 290 in described Continuous Casting Rolls roller footpath.
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| CN201410283642.7A CN104002018A (en) | 2014-06-23 | 2014-06-23 | Method for repairing open arc welding and surfacing of continuous casting roller of continuous casting fan-shaped section |
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| CN201410283642.7A CN104002018A (en) | 2014-06-23 | 2014-06-23 | Method for repairing open arc welding and surfacing of continuous casting roller of continuous casting fan-shaped section |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105479038A (en) * | 2016-01-20 | 2016-04-13 | 江苏星源电站冶金设备制造有限公司 | Build up welding layer of continuous casting roller |
| CN106513950A (en) * | 2016-12-05 | 2017-03-22 | 安徽兴林机械集团有限公司 | Grinding roller rotating surfacing process |
| CN109604927A (en) * | 2018-12-19 | 2019-04-12 | 安徽泰尔表面工程技术有限公司 | The build-up welding repair method of continuous cast mold short side copper sheet side |
| CN110039152A (en) * | 2019-04-30 | 2019-07-23 | 安阳钢铁股份有限公司 | A kind of slab caster cutting area roller-way of anti-gas flame cuttiug |
| CN111151968A (en) * | 2020-01-08 | 2020-05-15 | 燕山大学 | Axial additive manufacturing method for repairing continuous casting roller |
| CN112191990A (en) * | 2020-10-09 | 2021-01-08 | 常州宝菱重工机械有限公司 | Build-up welding method for continuous casting roller |
| CN112916986A (en) * | 2021-02-02 | 2021-06-08 | 常州本森焊业科技有限公司 | Build-up welding method for continuous casting roller |
| CN114074243A (en) * | 2020-08-14 | 2022-02-22 | 山西庞泉重型机械制造有限公司 | Method for repairing surface of two cylinders of piston rod based on girth welding cladding process |
| CN114367763A (en) * | 2022-01-18 | 2022-04-19 | 南京工程学院 | Wear-resistant surfacing electrode for improving surface performance of Q235 steel and cladding method |
| CN114799412A (en) * | 2022-06-02 | 2022-07-29 | 常州宝菱重工机械有限公司 | Surfacing method of continuous casting roller |
| CN115476019A (en) * | 2022-09-16 | 2022-12-16 | 苏州优霹耐磨复合材料有限公司 | Continuous casting roller surfacing process |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105479038A (en) * | 2016-01-20 | 2016-04-13 | 江苏星源电站冶金设备制造有限公司 | Build up welding layer of continuous casting roller |
| CN106513950A (en) * | 2016-12-05 | 2017-03-22 | 安徽兴林机械集团有限公司 | Grinding roller rotating surfacing process |
| CN109604927A (en) * | 2018-12-19 | 2019-04-12 | 安徽泰尔表面工程技术有限公司 | The build-up welding repair method of continuous cast mold short side copper sheet side |
| CN110039152B (en) * | 2019-04-30 | 2023-12-29 | 安阳钢铁股份有限公司 | Flame-cutting-resistant slab caster cutting area roller way |
| CN110039152A (en) * | 2019-04-30 | 2019-07-23 | 安阳钢铁股份有限公司 | A kind of slab caster cutting area roller-way of anti-gas flame cuttiug |
| CN111151968A (en) * | 2020-01-08 | 2020-05-15 | 燕山大学 | Axial additive manufacturing method for repairing continuous casting roller |
| CN111151968B (en) * | 2020-01-08 | 2021-07-30 | 燕山大学 | Axial additive manufacturing method for repairing continuous casting roller |
| CN114074243A (en) * | 2020-08-14 | 2022-02-22 | 山西庞泉重型机械制造有限公司 | Method for repairing surface of two cylinders of piston rod based on girth welding cladding process |
| CN112191990A (en) * | 2020-10-09 | 2021-01-08 | 常州宝菱重工机械有限公司 | Build-up welding method for continuous casting roller |
| CN112916986A (en) * | 2021-02-02 | 2021-06-08 | 常州本森焊业科技有限公司 | Build-up welding method for continuous casting roller |
| CN114367763A (en) * | 2022-01-18 | 2022-04-19 | 南京工程学院 | Wear-resistant surfacing electrode for improving surface performance of Q235 steel and cladding method |
| CN114799412A (en) * | 2022-06-02 | 2022-07-29 | 常州宝菱重工机械有限公司 | Surfacing method of continuous casting roller |
| CN114799412B (en) * | 2022-06-02 | 2023-08-29 | 常州宝菱重工机械有限公司 | Build-up welding method of continuous casting roller |
| CN115476019A (en) * | 2022-09-16 | 2022-12-16 | 苏州优霹耐磨复合材料有限公司 | Continuous casting roller surfacing process |
| CN115476019B (en) * | 2022-09-16 | 2024-02-02 | 苏州优霹耐磨复合材料有限公司 | Build-up welding process for continuous casting roller |
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Application publication date: 20140827 |