CN104827171A - Surface overlaying method of foot roll of continuous casting machine - Google Patents
Surface overlaying method of foot roll of continuous casting machine Download PDFInfo
- Publication number
- CN104827171A CN104827171A CN201510125474.3A CN201510125474A CN104827171A CN 104827171 A CN104827171 A CN 104827171A CN 201510125474 A CN201510125474 A CN 201510125474A CN 104827171 A CN104827171 A CN 104827171A
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- conticaster
- foot roller
- carrying
- earth
- continuous casting
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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
- B23K9/18—Submerged-arc welding
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention, which belongs to the technical field of the overlaying, discloses a surface overlaying method of a foot roll of a continuous casting machine. The method comprises the following steps: (1), carrying out pretreatment of a foot roll of a continuous casting machine; (2), carrying out soil preparation; (3), carrying out soil filling; (4), carrying out surface overlaying; (5), removing the filling soil; (6), carrying out heat processing in a heating furnace under the temperature of 550 DEG C to 560 DEG C, carrying out heat preservation for 2 to 3 hours, and then drawing the processed member out of the furnace for cooling; and (7), carrying out rough machine at a tool and flaw detection, and then carrying out fine machine to enable the member to have the required dimension. The method has the following advantages: the steps of the method are linked in order and reasonably; and the operation process is simple and convenient. The surface of the foot roll of the continuous casting machine is flat and smooth; the flexibility and abrasive resistance are high; and the Rockwell hardness HRC can reach over 45. Hot cracks of an overlapping layer and a welding joint are reduced; the service life of the foot roll of the continuous casting machine is prolonged; the maintenance cost is lowered; the using effect of the continuous casting machine during billet production can be improved to the maximum extent; and the product quality can be guaranteed to meet the requirement.
Description
Technical field
The invention belongs to technique for overlaying field, particularly relate to a kind of conticaster foot roller surface overlaying method.
Background technology
Composition is that the conticaster foot roller working condition of 42Cr is very harsh, need to bear the bulge power of thousands of celsius temperature steel billet and static pressure and the cyclic loading caused, conticaster foot roller not only there will be wearing and tearing in various degree, corrosion and flexural deformation, polygon heat fatigue cracking that also can be serious, when the degree of depth of crackle or length exceed the limiting value that can allow, in use can rupture and impact production by Sudden-instability, therefore, submerged-arc welding is adopted to carry out built-up welding to conticaster foot roller, can effectively improve antifatigue, anti-wear performance, extend its service life.At present, the conticaster foot roller in hollow form directly goes up submerged arc welding machine, and two ends are fixed, and then carry out surface overlaying.Problems existing is, operationally, solder flux, welding wire react to each other and produce a large amount of heat submerged arc welding machine, and overlay cladding at high temperature can produce thermal stress, overlay cladding and weld seam is caused to occur fire check, especially, in the factory building drawn badly, radiating effect is just poorer, and fire check is relatively more, not only conticaster foot roller surface overlaying qualification rate is low, product rework rate is high, and production cost increases, and the service life of conticaster foot roller is short.
Summary of the invention
In order to overcome the defect of prior art, the object of this invention is to provide a kind of conticaster foot roller surface overlaying method, distribute the heat of overlay cladding in time, eliminate thermal stress, reduce overlay cladding and weld seam fire check, improve conticaster foot roller surface overlaying qualification rate, reduce production cost, extend the service life of conticaster foot roller.
Conticaster foot roller surface overlaying method, specifically carry out according to the following steps:
1) conticaster foot roller pretreatment
The front preheating at 180 DEG C ~ 200 DEG C temperature of weldering is also incubated 2h ~ 3h;
2) earth preparation
A, select clean clay, the particle diameter of clay is 0.01 ~ 0.05mm;
B, the clay getting respective amount by certain weight ratio and water are poured in mixing tank, stir;
3) earth is filled
Take out the conticaster foot roller treating built-up welding, conticaster foot roller be vertically fixed on fixture, its lower end abutment on the baffle plate being located at ground, by step 2) the wet earth that stirs is filled in conticaster foot roller by upper end, and uses instrument tamping, guarantees gapless;
4) surface overlaying
A, the solder selected are: welding wire model is 414N, and gage of wire is 4mm, and solder flux is HJ260;
B, employing conventional manual submerged arc welding machine carry out submerged arc overlay welding to roll surface, and welding parameter is set as:
Electric current 400A ~ 500A, voltage 35V ~ 40V, built-up welding speed are 0.010m/min ~ 0.012 m/min, weld seam amount of lap is 40% ~ 50% of weld width;
5) earth is filled in removing
A, after roller is cooled to room temperature until conticaster foot, takes off conticaster foot roller, conticaster foot roller is vertically fixed on fixture again, earth is smash out;
B, with hairbrush, conticaster foot roller inner surface to be cleaned out, and purge the clay particle of inner surface with hair-dryer;
6) send into heating furnace to heat-treat at 550 DEG C ~ 560 DEG C temperature, and be incubated 2h ~ 3h, to eliminate thermal stress, and cooling of coming out of the stove;
7) upper lathe roughing is also detected a flaw, then is refined to and requires size.
Preferably, in step 2) described in clay: water=(5 ~ 10): 1.
Preferably, can first select electric drill to carry out vertical drilling hole in step 5), holing in electric drill limit, while loosen the earth of sclerosis, is then smash out by loosening earth from top to bottom with tip iron rod.
Compared with prior art, advantage is that the method step is connected in order, rationally, operating process is easy; The surfacing of conticaster foot roller is smooth, has good toughness and wearability, reaches more than Rockwell hardness HRC45; Overlay cladding and weld seam fire check reduce, and extend conticaster foot roller service life, reduce maintenance cost, improve the result of use of conticaster in bloom production to greatest extent, ensure that product quality meets the requirements.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1 selects diameter to be 20cm/ internal diameter to be the conticaster foot roller of 10cm, specifically carries out built-up welding according to the following steps:
1) conticaster foot roller pretreatment
The front preheating at 180 DEG C of temperature of weldering is also incubated 3 h.
2) earth preparation
A, select clean clay, the grain size proportion of clay is: 0.05mm 20%, 0.005mm 30%, 1um 50%, and after the clay of different-grain diameter mix with water, the walk gap of formation is few, is beneficial to earth heat absorption and timely transmission;
B, by weight clay: water=5:1, ensure that clay is fully moistening, be both convenient to be filled in conticaster foot roller, and earth will have been caused in built-up welding rotary course to leave roller inner surface because earth crosses rare again, clay and the water of getting respective amount are poured in mixing tank, stir.
3) earth is filled
Take out the conticaster foot roller treating built-up welding, conticaster foot roller be vertically fixed on fixture, its lower end abutment on the baffle plate being located at ground, by step 2) the wet earth that stirs is filled in conticaster foot roller by upper end, and uses instrument tamping, guarantees gapless;
Heat when wet earth not only can absorb sufficient roller surface soldered is in time also timely by moisture evaporative heat loss, makes the solder of overlay cladding and commissure to realize rapid cooling, prevents conticaster foot roller hardfacing weld deposit and weld seam from producing fire check; And the earth of filling can increase the quality of sufficient roller, when rotated, sufficient roller stationarity is good, further increases the quality of built-up welding.
4) surface overlaying
A, the solder selected are welding wire model is 414N, and gage of wire is 4mm, and solder flux is HJ260;
B, employing conventional manual submerged arc welding machine carry out submerged arc overlay welding to roll surface, and welding parameter is set as:
Electric current 450A, voltage 35V, built-up welding speed are 0.012m/min, weld seam amount of lap is 40% of weld width.
5) earth is filled in removing
A, after until conticaster foot, roller is cooled to room temperature, take off conticaster foot roller, conticaster foot roller is vertically fixed on fixture again, earth is due to after heat absorption, moisture evaporates and hardens, and can first select electric drill to carry out vertical drilling hole, holes in electric drill limit, while loosen the earth of sclerosis, then from top to bottom loosening earth is smash out with tip iron rod;
B, with hairbrush, conticaster foot roller inner surface to be cleaned out, and purge the clay particle of inner surface with hair-dryer.
6) send into heating furnace to heat-treat at 560 DEG C of temperature, and be incubated 2h, to eliminate thermal stress, and cooling of coming out of the stove.
7) upper lathe roughing is also detected a flaw, then is refined to and requires size.
Embodiment 2 processes with embodiment 1 method, and design parameter is in table 1, and carry out performance test to the conticaster foot roller of heap postwelding, concrete data see the following form 2.
Embodiment 3 processes with embodiment 1 method, and design parameter is in table 1, and carry out performance test to the conticaster foot roller of heap postwelding, concrete data see the following form 2.
Embodiment 4 processes with embodiment 1 method, and design parameter is in table 1, and carry out performance test to the conticaster foot roller of heap postwelding, concrete data see the following form 2.
Table 1 specifically implements parameter
Table 2 performance parameter
| Unit | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | |
| Overlay cladding thickness | mm | 5 | 5 | 5 | 5 |
| Case hardness | HRC | 45.97 | 46.12 | 46.35 | 45.83 |
From above-mentioned table 2, data are known, and when setting overlay cladding thickness is 5mm, the hardness of conticaster foot roller is greater than HRC45, meets conticaster production requirement completely.
The sufficient roller that surface overlaying obtains is carried out through overlaying method of the present invention, with the sufficient roller without the inventive method process in same thickness overlay cladding situation, two sufficient roller continuous casting steel billet tonnages contrasts, in table 3:
Table 3 improves front continuous casting steel billet tonnage rear with improvement
| Title | Steel billet | Steel billet | Steel billet | Steel billet |
| Untreated (ten thousand tons) | 8 | 8 | 8 | 8 |
| Art methods (ten thousand tons) | 10 | 10 | 10 | 10 |
| Through the inventive method (ten thousand tons) | 16 | 16 | 16 | 16 |
From data in above-mentioned table 3, the sufficient roller continuous casting steel billet tonnage obtained through overlaying method of the present invention on average improves 50%, and the service life of sufficient roller is extended greatly, improves more than 1 times service life.
Claims (3)
1. conticaster foot roller surface overlaying method, is characterized in that specifically carrying out according to the following steps:
1) conticaster foot roller pretreatment
The front preheating at 180 DEG C ~ 200 DEG C temperature of weldering is also incubated 2h ~ 3h;
2) earth preparation
A, select clean clay, the grain size proportion of clay is: 0.01 ~ 0.05mm 20%, 0.001 ~ 0.005mm 30%, 1 ~ 5um50%;
B, the clay getting respective amount by certain weight ratio and water are poured in mixing tank, stir;
3) earth is filled
Take out the conticaster foot roller treating built-up welding, conticaster foot roller be vertically fixed on fixture, its lower end abutment on the baffle plate being located at ground, by step 2) the wet earth that stirs is filled in conticaster foot roller by upper end, and uses instrument tamping, guarantees gapless;
4) surface overlaying
A, the solder selected are: welding wire model is 414N, and gage of wire is 4mm, and solder flux is HJ260;
B, employing conventional manual submerged arc welding machine carry out submerged arc overlay welding to roll surface, and welding parameter is set as:
Electric current 400A ~ 500A, voltage 35V ~ 40V, built-up welding speed are 0.010m/min ~ 0.012 m/min, weld seam amount of lap is 40% ~ 50% of weld width;
5) earth is filled in removing
A, after roller is cooled to room temperature until conticaster foot, takes off conticaster foot roller, conticaster foot roller is vertically fixed on fixture again, earth is smash out;
B, with hairbrush, conticaster foot roller inner surface to be cleaned out, and purge the clay particle of inner surface with hair-dryer;
6) send into heating furnace to heat-treat at 550 DEG C ~ 560 DEG C temperature, and be incubated 2h ~ 3h, to eliminate thermal stress, and cooling of coming out of the stove;
7) upper lathe roughing is also detected a flaw, then is refined to and requires size.
2. conticaster according to claim 1 foot roller surface overlaying method, is characterized in that in step 2) described in clay: water=(5 ~ 10): 1.
3. conticaster foot roller surface overlaying method according to claim 1, it is characterized in that first selecting electric drill to carry out vertical drilling hole in step 5), holing in electric drill limit, while loosen the earth of sclerosis, is then smash out by loosening earth from top to bottom with tip iron rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510125474.3A CN104827171B (en) | 2015-03-20 | 2015-03-20 | Surface overlaying method of foot roll of continuous casting machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510125474.3A CN104827171B (en) | 2015-03-20 | 2015-03-20 | Surface overlaying method of foot roll of continuous casting machine |
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| CN104827171A true CN104827171A (en) | 2015-08-12 |
| CN104827171B CN104827171B (en) | 2017-01-25 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107414326A (en) * | 2017-07-06 | 2017-12-01 | 承德新新机械制造有限公司 | A kind of crystallizer foot roll surface overlaying technique and clamping workpiece frock |
| 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 |
| CN112404651A (en) * | 2020-11-19 | 2021-02-26 | 湘潭大学 | Active stop block for composite powder particle surfacing and application method thereof |
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| JP2003305569A (en) * | 2002-04-10 | 2003-10-28 | Yutani Kogyo Kk | Method and apparatus for cladding by welding of wheel |
| CN101402152A (en) * | 2008-08-05 | 2009-04-08 | 烟台国冶冶金水冷设备有限公司 | Steel-smelting revolving furnace smoke canal weld deposit process |
| CN201799762U (en) * | 2010-09-10 | 2011-04-20 | 攀钢集团钢铁钒钛股份有限公司 | Cooling device for overlaying mill abrasion-resistant composite plate |
| CN103192160A (en) * | 2013-03-26 | 2013-07-10 | 重庆威导机械有限公司 | Repair welding method of large area die steel |
| CN103706921A (en) * | 2013-12-23 | 2014-04-09 | 鞍钢实业集团冶金机械有限公司 | Build up welding repair method of supporting roller of hot continuous rolling finishing mill |
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2015
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Patent Citations (5)
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| JP2003305569A (en) * | 2002-04-10 | 2003-10-28 | Yutani Kogyo Kk | Method and apparatus for cladding by welding of wheel |
| CN101402152A (en) * | 2008-08-05 | 2009-04-08 | 烟台国冶冶金水冷设备有限公司 | Steel-smelting revolving furnace smoke canal weld deposit process |
| CN201799762U (en) * | 2010-09-10 | 2011-04-20 | 攀钢集团钢铁钒钛股份有限公司 | Cooling device for overlaying mill abrasion-resistant composite plate |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107414326A (en) * | 2017-07-06 | 2017-12-01 | 承德新新机械制造有限公司 | A kind of crystallizer foot roll surface overlaying technique and clamping workpiece frock |
| CN107414326B (en) * | 2017-07-06 | 2019-08-23 | 承德新新机械制造有限公司 | A kind of crystallizer foot roll surface overlaying technique and clamping workpiece tooling |
| 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 |
| 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 |
| CN112404651A (en) * | 2020-11-19 | 2021-02-26 | 湘潭大学 | Active stop block for composite powder particle surfacing and application method thereof |
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| Publication number | Publication date |
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| CN104827171B (en) | 2017-01-25 |
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