CN107717259A - Composite manufacturing by hard surfacing pinch roll, the capping resurfacing welding material of Wrapping Roll roll surface and technique - Google Patents
Composite manufacturing by hard surfacing pinch roll, the capping resurfacing welding material of Wrapping Roll roll surface and technique Download PDFInfo
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- CN107717259A CN107717259A CN201710878419.0A CN201710878419A CN107717259A CN 107717259 A CN107717259 A CN 107717259A CN 201710878419 A CN201710878419 A CN 201710878419A CN 107717259 A CN107717259 A CN 107717259A
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- welding material
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Classifications
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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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/308—Fe as the principal constituent with Cr as next major constituent
- B23K35/3086—Fe as the principal constituent with Cr as next major constituent containing Ni or Mn
-
- 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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
- B23K35/0266—Rods, electrodes, wires flux-cored
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a kind of composite manufacturing by hard surfacing pinch roll, the capping resurfacing welding material and bead-welding technology of Wrapping Roll roll surface.The capping resurfacing welding material deposited metal contains following component in percentage by weight：C：0.3%~1.0%；Mn：1.0%~4.8%；Si：0.1%~0.3%；Cr：7.0%~11.0%；Ti：0.01%~1.0%；V：0.2%~1.8%；W：3.0%~10.0%；Mo：1.0%~6.0%；Co：0.2%~3.9%；Rare earth：0.1~1.5%；Surplus is Fe.Hardness >=55HRc of the as-welded lower deposited metal of the weld overlay materials, 550 DEG C of temper number >=59HRc, the anti-stick Steel Properties on surface, resistance to surface striped, oxidation resistance during work roll cooling are improved simultaneously, can solve the problem that pinch roll, the problem of Wrapping Roll service life is low.
Description
Technical field
The present invention relates to a kind of composite manufacturing by hard surfacing pinch roll, the resurfacing welding material and bead-welding technology of Wrapping Roll roll surface, especially
It is related to for hot-strip reels pinch roll, the composite manufacturing by hard surfacing of Wrapping Roll roll surface process and the capping heap wlding that remanufactures
Material and its bead-welding technology, belong to technique for overlaying field.
Background technology
Hot strip mill is the main body rolling equipment for producing hot-rolled sheet coil.The condition of work of coiling machine is in whole tandem rolling
It is most severe in unit, is easiest to what accidents happened, and pinch roll and Wrapping Roll are the parts of coiling machine most critical.Pinch roll, help
The moment of flexure born of the body of roll, roll surface contact stress are generally less than the roll torque of other rolls on same rolling line and connect when winding up roller works
Stress is touched, and pinch roll, Wrapping Roll (annual) must just be changed in overhaul, and their surface temperature during work
Generally 550 DEG C~750 DEG C of degree.
Composite manufacturing by hard surfacing is an important branch in welding field, is mainly used in the industries such as steel, cement, electric power.
Flux-cored wire has an arc stability, and cladding rate is high, beautiful appearance, the advantages that being easy to adjustment, turn into current steel, cement,
The first choice of the industry reparation such as electric power.In the last few years, although the hard-face overlaying welding of high alloy has very complete description of materials in China
With perfect process conditions, market also can be found everywhere the flux-cored wire of built-up welding pinch roll and Wrapping Roll at home, but without one kind
Product can stablize the built-up welding for meeting pinch roll, Wrapping Roll, and the problems such as steel bonding, cracking and abrasion easily occurs in roller.How to obtain good
The resurfacing welding material of the heat endurances such as hardness, high temperature abrasion resistance, thermal fatigue resistance, impact resistance and perfect technique, it is puzzlement weldering
One major issue of border.
The content of the invention
It is an object of the invention to provide a kind of for hot-strip reels pinch roll, the capping heap wlding of Wrapping Roll
Material, to meet that roll works under 550 DEG C~750 DEG C high temperature, there is good heat endurance, service life is improved, and reduction is rolled
Roll consumption cost.
Another object of the present invention is to provide a kind of use capping resurfacing welding material composite manufacturing by hard surfacing pinch roll, help
The bead-welding technology of winding up roller roll surface.
To achieve the above object, the present invention uses following technical scheme：
The capping resurfacing welding material of a kind of composite manufacturing by hard surfacing pinch roll, Wrapping Roll roll surface, capping resurfacing welding material deposition gold
Category contains following component in percentage by weight：C：0.3%~1.0%；Mn：1.0%~4.8%；Si：0.1%~
0.3%；Cr：7.0%~11.0%；Ti：0.01%~1.0%；V：0.2%~1.8%；W：3.0%~10.0%；Mo：
1.0%~6.0%；Co：0.2%~3.9%；Rare earth：0.1~1.5%；Surplus is Fe.
Wherein, the main function of each element is in built-up welding deposited metal：
(1)C
C main functions are the carbide being distributed with substantial amounts of small and disperseds of formation such as W, Mo, Ti, V, Cr, greatly improve heap
The performances such as hardness, heat endurance, high temperature abrasion resistance in weldering deposited metal.C is also to suppress the master that high temperature ferrite is formed simultaneously
Want element.
(2)Cr
Chromium content improves, and increases the quenching degree of deposited metal and anti-oxidant, corrosion resistance ability, and chromium is not only formed with carbon
Chromium carbide and can solution strengthening matrix, therefore on the premise of oxidation resistance is improved raising built-up welding deposited metal hardness.
But with chromium content (＞ 5%) raising, improve tissue in built-up welding deposited metal and easily ferrite occur, so as to cause hardness with
Wearability declines.
(3)W、Mo、V
Carbide, while part solution strengthening matrix are formed with carbon, improves the red hardness and heat resistance of hardfacing alloy.Especially
It is to add a small amount of V to have formed primary carbide, is advantageous to crystal grain thinning, improves the plasticity and toughness energy of deposited metals.
(4)Co
Add the formation that Co members usually suppress ferritic phase.The addition of martensite heat-resistant steel Co elements can promote other alloys
The precipitation of element precipitated phase, so as to improve the elevated temperature strength of steel.Moreover, Co is the solution strengthening element in martensite steel, can
Improve the high-temperature behavior and inoxidizability of built-up welding deposited metal.
(5) rare earth
The main function of rare earth element is purifying, Strengthening and Toughening crystal boundary, so as to improve elevated temperature strength, high-temp plastic and anti-oxidant
Performance.The addition of rare earth element, field trash easily on the one hand is combined to form with impurity in built-up welding deposited metal, so as to reduce
The quantity of field trash in built-up welding matrix；On the other hand easily in hot stage forming core, crystal grain thinning.Both are incorporated in deposited metal
In play a part of purify matrix, crystal grain thinning, so as to improve the processing performances such as the cracking resistance of resurfacing welding material, toughness and tenacity and
Mechanical property.
The present invention ensures that built-up welding is improved while the elevated temperature strength of material further improves melts by gradually stepping up Cr contents
The inoxidizability of metallisation；Optimize the alloying elements such as W, Mo, V, C, Co, the elevated temperature strength of resurfacing welding material is improved by alloying
And the stability of built-up welding body tissue, while ferritic formation is inhibited, prevent built-up welding deposited metal structural transformation from causing firmly
The decline of degree.Deposited metal and metamorphism are purified by rare earth element, improve elevated temperature strength, high-temp plastic and inoxidizability
Energy.
Inventor passes through substantial amounts of experimental analysis, finds high temperature of the compound rare earth to deposited metal of the present invention of lanthanum or yttrium
Intensity, plasticity improve huge.Therefore, in the capping resurfacing welding material, the rare earth element be preferably in lanthanum and yttrium at least
It is a kind of.
Preferably, impurity P content is less than 0.022% in the capping resurfacing welding material, and Impurity S con-tent is less than
0.018%.
In described capping resurfacing welding material, deposited metal is organized as being dispersed with martensitic matrix after tempering a number of
Carbide.
Described capping resurfacing welding material has following performance：
The hardness of as-welded lower deposited metal：≥55HRc
550 DEG C of temper numbers：≥59HRc
Under 550 DEG C of high temperature：
Tensile strength：Rm＞ 1300MPa
Elongation after fracture：A ＞ 8%
The contraction percentage of area：Z ＞ 35%
It is a kind of using the capping resurfacing welding material composite manufacturing by hard surfacing pinch roll, the bead-welding technology of Wrapping Roll roll surface, it is special
Sign is, comprises the following steps：
(1) preheat：Preheating temperature is 260 DEG C, and during preheating, in room temperature in the range of 100 DEG C, programming rate is not higher than 40
℃/h；After 100 DEG C, programming rate is not higher than 50 DEG C/h, uniformly heating.
(2) built-up welding parameter request：By taking Φ 3.2mm flux-cored wires as an example, it is desirable to：
Welding current：360~480A,
Weldingvoltage：27V~32V,
Speed of welding：380mm/min~500mm/min,
Welding bead overlaps：Adjacent welding bead overlap joint must be more than 50%, and specific amount of lap should regard welding bead flat smooth situation,
Weld polarity：Using DC reverse connection,
Electrode extension：16mm~28mm,
Welding bead interlayer temperature：260 DEG C~380 DEG C.
(3) postwelding is heat-treated to pinch roll, Wrapping Roll, and temperature is 300 DEG C~350 DEG C, soaking time 1h~2h；
In the step, in room temperature within 100 DEG C, programming rate is not more than 40 DEG C/h, little no more than 50 DEG C/h, cooling rate afterwards
In 25 DEG C/h.
(4) it is tempered：Tempering maximum temperature must not exceed 565 DEG C, general using 540 DEG C~550 DEG C tempering, soaking time root
Depending on roller diameter, but soaking time is no less than 4h.
(5) cool with stove, when furnace temperature is reduced to 150 DEG C, pinch roll, Wrapping Roll are come out of the stove and are placed in dedicated box or use stone
Cotton covers slow cooling to room temperature.
The advantage of the invention is that：
China's tradition high-rigidity resurfacing welding material is Cr5 alloy tool steels and Cr13 martensitic stain less steel series alloys, Cr5 systems
Alloy has excellent hardness (＞ 55HRC), but because Cr contents are slightly lower, corrosion resistance is reported to the leadship after accomplishing a task；And Cr13 systems alloy has
Excellent corrosion resistance, but hardness is slightly lower (＜ 53HRC).The advantages of present invention is combined between the two, by adjusting in alloy
W, the content of the alloy such as Mo, Co, V, suppress to improve the ferritic structure easily occurred in built-up welding deposited metal with chromium content, pass through conjunction
The precipitation strength and mode for being combined of solution strengthening of gold and carbon etc. it is creative develop Cr contents 7.0%~11.0% it
Between, as-welded hardness is not less than 55HRC, has good inoxidizability and good wearability.
The capping resurfacing welding material and bead-welding technology of the present invention has been successfully applied in hot strip mill strip pinch roll, helped
The composite manufacturing by hard surfacing of winding up roller, it is functional to use on the machine rear surface oxidation-resistant, and surface does not show without glutinous slag, light and dark striped
Write, the advantages that surface is smooth, disclosure satisfy that roll working condition requirement, service life resurfacing welding material more common than market significantly improves, drop
Low roll consumption cost, completely solve pinch roll, the problem of Wrapping Roll service life is low.The heap of other milling train Heat Working Rolls
The capping resurfacing welding material of the present invention and corresponding bead-welding technology can also be used by welding compound (again) manufacture.
Embodiment
The following examples of the present invention are only intended to the embodiment of the explanation present invention, rather than for limiting this hair
Bright protection domain, it is every for person skilled in the art, as long as can without departing from the technical characteristic scope of the present invention
Various change or amendment are done, its essence is identical with technical scheme, belongs to the protection category of the present invention.
Embodiment 1~4
From the welding wire with the chemical composition shown in table 1, performance test is carried out.
The mass percent (wt%) of each composition in the capping resurfacing welding material of table 1
| Embodiment | C | Cr | Mn | Si | S | P | W | V | Rare Earth Lanthanum | Rare-earth yttrium | Mo | Ti | Co | Fe |
| 1 | 0.3 | 11.0 | 1.0 | 0.3 | 0.018 | 0.021 | 5 | 1.2 | 0.4 | 0 | 6.0 | 0.20 | 2.2 | Surplus |
| 2 | 0.8 | 8.0 | 2.8 | 0.2 | 0.004 | 0.012 | 3 | 0.2 | 0 | 0.4 | 1.1 | 1.0 | 1.3 | Surplus |
| 3 | 0.6 | 10.0 | 3.2 | 0.3 | 0.008 | 0.014 | 6 | 0.9 | 1.0 | 0.04 | 5.2 | 0.52 | 0.2 | Surplus |
| 4 | 1 | 7.0 | 4.6 | 0.1 | 0.015 | 0.020 | 10 | 1.6 | 0.06 | 1.43 | 2.4 | 0.01 | 3.8 | Surplus |
The capping resurfacing welding material that will be prepared in embodiment 1~4, respectively mother metal for 45# steel roll on (Φ 400mm ×
600mm) built-up welding, first two layers of low-alloy prime coat of built-up welding on matrix, unilateral built-up welding thickness is about 5mm, and rear built-up welding embodiment 1~
Capping resurfacing welding material in 4, unilateral built-up welding thickness are 15mm.The specific process parameter of overlay-operation is as shown in table 2.
The bead-welding technology parameter of table 2
Heap postwelding, on roll continue 350 DEG C insulation 1h, after be slowly cooled to room temperature.
550 DEG C of insulation 10h tempering heat treatment：In room temperature within 100 DEG C, programming rate is 40 DEG C/h, is afterwards 50
DEG C/h, cooling rate is 25 DEG C/h, is cooled to room temperature.
Most made respectively on roll capping layer by national regulations through magnetic and the defects of ultrasonic examination surface flawless afterwards
Take：Φ 6mm tensile test bar, 55mm × 10mm × 10mm impact specimen, its result are as shown in table 3.
The Some Mechanical Properties of the capping resurfacing welding material of embodiment 1~4 under the different temperatures of table 3
Claims (7)
- A kind of 1. capping resurfacing welding material of composite manufacturing by hard surfacing pinch roll, Wrapping Roll roll surface, it is characterised in that the capping heap wlding Material deposited metal contains following component in percentage by weight：C：0.3%~1.0%；Mn：1.0%~4.8%；Si： 0.1%~0.3%；Cr：7.0%~11.0%；Ti：0.01%~1.0%；V：0.2%~1.8%；W：3.0%~ 10.0%；Mo：1.0%~6.0%；Co：0.2%~3.9%；Rare earth：0.1%~1.5%；Surplus is Fe.
- 2. capping resurfacing welding material according to claim 1, it is characterised in that compound using the capping resurfacing welding material built-up welding When manufacturing working roll, the correlation performance parameters of built-up welding deposited metal are：The hardness of as-welded lower deposited metal：≥55HRc550 DEG C of temper numbers：≥59HRcUnder 550 DEG C of high temperature：Tensile strength：Rm＞ 1300MPaElongation after fracture：A ＞ 8%The contraction percentage of area：Z ＞ 35%.
- 3. capping resurfacing welding material according to claim 1, it is characterised in that deposited metal is organized as martensite base after tempering Carbide is distributed with body.
- 4. capping resurfacing welding material according to claim 1, it is characterised in that the rare earth is at least one in lanthanum and yttrium Kind.
- A kind of 5. built-up welding of capping resurfacing welding material composite manufacturing by hard surfacing pinch roll, Wrapping Roll roll surface using described in claim 1 Technique, it is characterised in that comprise the following steps：(1) preheat：Preheating temperature is 260 DEG C；(2) built-up welding parameter request：By taking Φ 3.2mm flux-cored wires as an example, for Φ 3.2mm flux-cored wires, it is desirable to：Welding current：360~480A,Weldingvoltage：27V~32V,Speed of welding：380mm/min~500mm/min,Welding bead overlaps：Adjacent welding bead overlap joint must be more than 50%, and specific amount of lap should regard welding bead flat smooth situation,Weld polarity：Using DC reverse connection,Electrode extension：16mm~28mm,Welding bead interlayer temperature：260 DEG C~380 DEG C；(3) postwelding is heat-treated to pinch roll, Wrapping Roll, and temperature is 300 DEG C~350 DEG C, soaking time 1h~2h；Slow cooling is arrived Room temperature, cooling rate are not more than 25 DEG C/h.(4) it is tempered：Temperature is 550 DEG C~560 DEG C, and constant temperature time is not less than 4h；(5) cool with stove, when furnace temperature is reduced to 150 DEG C, pinch roll, Wrapping Roll are come out of the stove and is placed in dedicated box or is hidden with asbestos Lid slow cooling is to room temperature.
- 6. bead-welding technology according to claim 5, it is characterised in that in the step (1), during preheating, in room temperature to 100 In the range of DEG C, programming rate is not higher than 40 DEG C/h；After 100 DEG C, programming rate is not higher than 50 DEG C/h, uniformly heating.
- 7. bead-welding technology according to claim 5, it is characterised in that in the step (3), in room temperature within 100 DEG C, Programming rate is not more than 40 DEG C/h, afterwards no more than 50 DEG C/h.
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| CN201710878419.0A CN107717259A (en) | 2017-09-25 | 2017-09-25 | Composite manufacturing by hard surfacing pinch roll, the capping resurfacing welding material of Wrapping Roll roll surface and technique |
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Cited By (4)
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| CN108672891A (en) * | 2018-04-27 | 2018-10-19 | 宁夏石炭井炭化实业公司 | A kind of welding procedure of repair forging mold |
| CN110560959A (en) * | 2019-08-06 | 2019-12-13 | 鞍钢附企三炼钢修造总厂 | Impact-resistant, high-temperature-resistant and high-hardness welding wire and manufacturing and using methods thereof |
| CN111112878A (en) * | 2019-12-25 | 2020-05-08 | 北京北冶功能材料有限公司 | Bright welding wire for heat-resistant steel of ultra-supercritical coal-fired power station |
| CN113798325A (en) * | 2020-06-14 | 2021-12-17 | 上海梅山钢铁股份有限公司 | Hot coiling box pinch roll device for preventing meat sticking and control method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108672891A (en) * | 2018-04-27 | 2018-10-19 | 宁夏石炭井炭化实业公司 | A kind of welding procedure of repair forging mold |
| CN110560959A (en) * | 2019-08-06 | 2019-12-13 | 鞍钢附企三炼钢修造总厂 | Impact-resistant, high-temperature-resistant and high-hardness welding wire and manufacturing and using methods thereof |
| CN111112878A (en) * | 2019-12-25 | 2020-05-08 | 北京北冶功能材料有限公司 | Bright welding wire for heat-resistant steel of ultra-supercritical coal-fired power station |
| CN113798325A (en) * | 2020-06-14 | 2021-12-17 | 上海梅山钢铁股份有限公司 | Hot coiling box pinch roll device for preventing meat sticking and control method |
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