CN105648349B - A kind of preparation method of cut deal hot straightening roll - Google Patents
A kind of preparation method of cut deal hot straightening roll Download PDFInfo
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- CN105648349B CN105648349B CN201610222223.1A CN201610222223A CN105648349B CN 105648349 B CN105648349 B CN 105648349B CN 201610222223 A CN201610222223 A CN 201610222223A CN 105648349 B CN105648349 B CN 105648349B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/38—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for roll bodies
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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Abstract
The invention discloses a kind of preparation method of cut deal hot straightening roll, it is characterized in that：Comprise the following steps：The first step, melting roller stock steel：Each component weight ratio is in steel：C 0.45%~0.56%, Si 1.50%~2.20%, Mn≤0.15%, Cr 8.00%~13.50%, Mo 1.50%~2.50%, V 0.80%~1.80%, W 0.20%~0.30%, Nb 0.10%~0.40%, S≤0.020%, P≤0.025%, Ni≤0.50%, Cu≤0.20%, Fe surpluses；Second step, ladle refining；3rd step, ingot casting；4th step, forging roller stock；Forging after annealing；5th step, Surface heat-treatent.High temperature impact and abrasion, high warm alternation and reversed of stress fatigue can be born by cut deal hot straightening roll obtained in the preparation method.
Description
Technical field
The invention belongs to hot rolled steel plate steel plate production line thermal straightening machine field, and in particular to a kind of cut deal hot straightening roll
Preparation method.
Background technology
After hot rolled steel plate is through finishing rolling mill, aligned by thermal straightening unit in hot state, make dimensional accuracy, the template of steel plate
With the requirement that the type quality index such as glacing flatness reaches finished steel plate.Hot straightening roll is used for major section steel works hot rolled steel plate production lines
Thermal straightening unit, is the core key part of thermal straightening unit.
Thermal straightening active section operating mode is severe on domestic hot rolled steel plate production line, particularly medium plate hot rolling line, rectifys
Straightening force during straight steel plate reaches 30000kN~40000kN, and hot straightening roll subjects larger bending stress, alternating thermal stress,
Therefore it is easily caused hot straightening roll failure.Hot straightening roll failure principal phenomena be：Abrasion, adhesive surface, impact and fatigue cause
Chip off-falling, pit, cooling medium corrosion with abrasion collective effect cause corrosive wear etc..Existing hot straightening roll material mainly has
60CrMoV, 60CrMnMo, X40CrMoV5-1 (H13, H13 modified) etc., the characteristic of various materials is as follows：
60CrMoV, 60CrMnMo case hardness are higher, can reach HRC 60 and more than, but hardness drop effectively in quench-hardened case
Low gradient is relatively large, and temper resistance is poor, and in thermal straightening, the stability of hardness is not enough, and case hardness is changed greatly.
X40CrMoV5-1 and follow-on case hardness are relatively low, typically in 52~56HRC, straightening steel plate temperature it is low or
During high-strength plate, it is also easy to produce and hits trace, Shortcomings.It is relatively costly using electroslag remelting in its preparation technology.
Additionally, the steel grade such as above-mentioned 60CrMoV, 60CrMnMo, X40CrMoV5-1 (H13, H13 modified) is having outer cold water
Under conditions of, and under coolant and abrasive conditions, corrosive wear is also easy to produce, influence service life.
Bearing high-temperature steel plate impact and abrasion, warm alternation and reversed of stress fatigue effect, vapour corrosion and roller high
Surface oxidation causes corrosive wear and oxidation adhesion etc. all easily to cause hot straightening roll to fail, so as to influence to be rectified the surface of steel plate
Quality.Make its smoothing roll service life shorter, work 1 to 2 months must the offline reconditioning of roll change；New roller uses the size that reaches capacity
Afterwards, repaired in the way of built-up welding after typically using processing to foreign round, resurfacing welding material is based on Cr13 shaped steel.No matter any, heap
There are tissue defects in layer, easily there is inhomogeneities, and using effect is worse, and 10 for having day or so occur as soon as failure.Therefore, heat
The quality life-span of steel rolling board assembly line thermal straightening machine group hot straightening roll, seriously constrains Heavy Plate Production efficiency, constrains production
The reduction of line cost.
With the development of steel rolling technology, Rolling Production linear velocity and automaticity, and milling train sheet material roll-force, steel plate
The continuous improvement of surface quality requirements, to rolling line thermal straightening machine smoothing roll quality particularly the wearability of roller, intensity and
Toughness, roll surface are bright and clean to propose requirement higher.Therefore, high-quality high-quality hot straightening roll material is developed to promoting domestic rolling industry
Technological progress, the competitiveness of smoothing roll material product, improve production efficiency is respectively provided with very great economic implications and society imitates
Benefit.
Based on this, applicant considers that design one kind can bear high temperature impact and abrasion, high warm alternation and reversed of stress
Fatigue, resistance to vapour corrosion to avoid, adhere and corrosive wear by the surface quality of strong steel plate to being made by the oxidation caused by surface oxidation
Into the preparation method of the cut deal hot straightening roll of influence.
The content of the invention
For above-mentioned the deficiencies in the prior art, the technical problems to be solved by the invention are：How providing one kind can hold
By high temperature impact and abrasion, high warm alternation and reversed of stress fatigue, resistance to vapour corrosion is avoiding the oxygen caused by surface oxidation
Change the preparation method of the cut deal hot straightening roll of adhesion and corrosive wear to being impacted by the surface quality of strong steel plate.
In order to solve the above-mentioned technical problem, present invention employs following technical scheme：
A kind of preparation method of cut deal hot straightening roll, comprises the following steps：
The first step, melting roller stock steel：
The percentage by weight of each component is in the roller stock steel：
Second step, ladle refining：
The molten steel that the first step is produced is refined using ladle refining furnace, is de-gassed place to molten steel under vacuum
Reason；
3rd step, ingot casting：
Ingot casting is carried out under vacuum or inert gas shielding；
4th step, forging roller stock：
Roller stock is more than 4 using the forged technique manufacture of ingot casting obtained in upper step, forging compression ratio；The forging technology is：
1100 DEG C~1160 DEG C heating, initial forging temperature be 1050 DEG C~1100 DEG C, final forging temperature >=820 DEG C；
Forging after annealing；
5th step, Surface heat-treatent：
Through 1000HZ, 1020~1100 DEG C of mid frequency induction hardenings are processed and 550 DEG C of tempers.
Preferably, the above-mentioned first step is carried out in electric arc furnaces.
Preferably, roller stock is through the slow cooling of annealing process before processing elder generation after forging.
Preferably, the retarded cooling process is：Roller stock buries more than sand slow cooling 72h into burial pit after forging, and works as roller stock
Temperature less than 100 DEG C go out hole, go out hole after again slow cooling be no more than 8h.
The principle explanation of the preparation method of cut deal hot straightening roll of the invention：
1st, (melting roller stock steel) rational alloying：
Roller body uses modulation treatment, wherein, chemical composition (component of roller stock steel) is to ensure that roller has well
Obdurability, hardenability, wearability, the basis of fatigue performance in the enough depth of work layer on surface.
1. carbon (C) content is the important intensified element in steel, is by being solid-solubilized in the matrix of steel, playing the reinforcing to steel
Effect, while the carbide former in part carbon and steel forms carbide, plays a part of to strengthen and increase wearability.Carbon
Content is lower, and the intensity of steel is poorer with anti-wear performance but too high, the impact flexibility reduction of roller, easy fracture.According to calculating and in fact
Test, the carbon content 0.45%~0.55% in preparation method of the invention in roller stock steel is more suitable.
2. the increase of chromium (Cr) content can improve the quenching degree of steel and the oxidation resistance of steel, both improve the hardened depth of steel
Degree, solves the problems, such as that regular maintenance shuts down stage corrosion again.On the basis of experiment, in preparation method of the invention in roller stock steel
Cr contents 8.50%~13.50% are most appropriate.
3. melting roller stock steel has appropriate chromium (Cr), molybdenum (Mo), vanadium (V), niobium (Nb), and it is all that strong carbide is formed
Element, forms M7C3, M2C and M (C, N) type carbide in steel, improves wearability, and Mo, V also act as increase temper resistance
Important function, make roller surfaces at 500~600 DEG C also have hardness high.V, Nb form MC, M (C, N) of small and dispersed
Type carbide, crystal grain thinning increased the obdurability of steel, improve wearability and anti-fatigue performance.On the basis of experiment, this hair
Molybdenum 1.50%~2.50%, vanadium 0.80%~1.80% are most appropriate in roller stock steel in bright preparation method.
4. appropriate niobium (Nb) is added, the carbide decomposition temperature of formation is high, and coarse grains are prevented when high temperature quenches.This
It is most appropriate containing niobium 0.10%~0.40% in roller stock steel in the preparation method of invention.
2nd, economic benefit
The component of melting roller stock steel in preparation in accordance with the present invention, using electric arc furnaces+external refining (LF)+vacuum
The operation for the treatment of, reduces electric slag refusion and smelting operation, therefore can reduce the manufacturing cost of hot straightening roll.
3rd, spheroidizing operation
Slow cooling after forging is when can not arrange spheroidizing immediately after roller stock forging, to avoid roller stock in cooling procedure
The technological measure for even cracking being cracked under the stress of generation and being taken；If timely spheroidizing, it may be unnecessary to slow
Cooling working procedure.Such as can not in time spheroidizing when, then the slow cooling operation is for necessary.
The effect of spheroidizing is to improve the carbide morphology in roller stock microstructure, roller stock is had certain toughness,
It is to prepare for modulation heat treatment provides microstructure.Spheroidizing, can be under can also being room temperature state under Warm status after forging
Beginning to warm up is carried out.
4th, finished product Technology for Heating Processing
Quenching, tempering process requirement control 32~37HRC of hardness, surface heat treatment process control effective quench-hardened case to be more than
12mm, case hardness is by reaching 61HRC controls.Wherein：
1) quenching+tempering technological requirement control 32~37HRC of hardness, its effect is roll body is had enough obdurabilities,
Can neither be too hard, again can not be too soft, then roll body poor toughness really up to the mark, too soft then insufficient strength is yielding during work；
2) it is to carry out surface hardening again after representing modulated heat treatment effectively to urge hard formation, and its mode of heating is that Medium frequency induction adds
Heat, speed is fast, and layer depth of the heating is small.But to ensure roller performance, it is necessary to assure heat interval velocity to ensure interval velocity of hardening；
Too shallow, hardness decline curve slope of the roller from surface to roll body is too big, and easily fatigue crack is produced in shallow-layer when roller works, and leads
Cause surface pull out type fracture.Therefore depth of hardening zone need be sought.
3) case hardness is more than 61HRC, is Con trolling index, actually should be 58-61HRC.
The preparation method of cut deal hot straightening roll of the invention has following Advantageous Effects：
1st, the component design of roller stock steel ensures that smoothing roll material has high-hardenability, through 1000HZ 1020 DEG C~1100
DEG C mid frequency induction hardening and 550 DEG C of tempering, make body of roll working lining have crystal grain refinement, even tissue, high intensity and one within 12mm
Determine toughness, high rigidity and wearability, anti-fatigue performance, the ability of certain water vapor corrosion, it is ensured that working roll is aligning hot steel
It is uniformly wear-resisting during plate；Avoid crack of surface layer, chip off-falling；Ensure that roller bears hot steel plate impact without producing zap pit and fracture.
2nd, the technique that preparation method of the invention combines ladle refining (LF) and vacuum outgas (VD) using electric arc furnaces (EAF)
Flow, reduces electroslag remelting operation, optimizes the heat treatment condition in smoothing roll preparation process, effectively reduces preparation energy consumption
And cost.
3rd, improved using the roller newer than general 60CrMoV of cut deal hot straightening roll service life obtained in preparation method of the present invention
2 times, specific surface Technology of Welded Roller improves 5 times；The surface quality of straightening steel plate meets standard requirement.High-performance cut deal hot straightening roll valency
Lattice aspect is suitable with the new rollers of 60CrMoV, with cost performance higher.It is therefore particularly suitable for same type steel plate production line at home
On promote the use of.
4th, ensure that hot straightening roll structural homogenity, ensure that the obdurability of aligning roller body, case hardness is high, effectively
Hardened depth, hardness is uniform, it is ensured that roller is wear-resisting, the resistance to alternation of the burn into of resistance to steam is in lotus and cool-hot fatigue fatigue, it is to avoid open on top layer
Split, chip off-falling.More passed through through the not only manufacturing cost reduction of hot straightening roll obtained in preparation method of the present invention, and obtained hot straightening roll
It is durable long, therefore also being capable of improve production efficiency, reduction use cost.
5th, the work layer depth and hardness, uniformity of smoothing roll, it is ensured that roller is uniformly wear-resisting；Ensure that aligning roller body
Obdurability under the conditions of, with enough effective depth of hardening, it is to avoid crack of surface layer, chip off-falling, it is ensured that roller bear steel plate impact
Without producing zap pit and fracture；With certain resistance to steam corrosive nature, coordinate with backing roll, reduce corrosive wear.
Specific embodiment
The present invention is described in further detail below.
Embodiment 1：
A kind of preparation method of cut deal hot straightening roll, comprises the following steps：
The first step, melting roller stock steel：
The percentage by weight of each component is in the roller stock steel：
Inevitable impurity (Mn, S, P, Ni, Cu) is allowed during implementation, in said components, but still needs to have impurity
Effect control.
Second step, ladle refining：
The molten steel that the first step is produced is refined using ladle refining furnace, is de-gassed place to molten steel under vacuum
Reason；
3rd step, ingot casting：
Ingot casting is carried out under inert gas shielding；
4th step, forging roller stock：
Roller stock, using 6000 tons of press, forges compression ratio 4.5 using the forged technique manufacture of ingot casting obtained in upper step；Institute
Stating forging technology is：1160 DEG C of heating, initial forging temperature is 1050 DEG C, 850 DEG C of final forging temperature；
Annealed immediately after forging；
5th step, Surface heat-treatent：
Through 1000HZ, 1020 DEG C of mid frequency induction hardenings are processed and 550 DEG C of tempers.
Wherein, it is described to be annealed into spheroidizing.
Wherein, after forging roller stock through annealing process before processing elder generation slow cooling.
Wherein, the retarded cooling process is：Roller stock buries more than sand slow cooling 72h into burial pit after forging, and when roller stock temperature
Less than 100 DEG C go out hole, go out hole after again slow cooling be no more than 8h.
The test result of materialsing of the material of hot straightening roll as obtained in the preparation method of the present embodiment is as follows：
Body hardness is 35HRC；
Rm (tensile strength) is 1130MPa；
Rel (yield strength) is 885MPa；
Aku (impact absorbing energy) is 11.5J；
Microscopic structure is tempered sorbite+carbide, and grain size is 9 grades；
Case hardness is 60HRC, is 56HRC in the hardness at the 12mm of surface.
Embodiment 2：
A kind of preparation method of cut deal hot straightening roll, comprises the following steps：
The first step, melting roller stock steel：
The percentage by weight of each component is in the roller stock steel：
Second step, ladle refining：
The molten steel that the first step is produced is refined using ladle refining furnace, is de-gassed place to molten steel under vacuum
Reason；
3rd step, ingot casting：
Ingot casting is carried out under inert gas shielding；
4th step, forging roller stock：
Roller stock, using 6000 tons of press, forges compression ratio 5 using the forged technique manufacture of ingot casting obtained in upper step；It is described
Forging technology is：1100 DEG C of heating, initial forging temperature is 1100 DEG C, 900 DEG C of final forging temperature；
Annealed immediately after forging；
5th step, Surface heat-treatent：
Through 1000HZ, 1100 DEG C of mid frequency induction hardenings are processed and 550 DEG C of tempers.
Wherein, the above-mentioned first step is carried out in electric arc furnaces.
Wherein, it is described to be annealed into spheroidizing.
Wherein, after forging roller stock through annealing process before processing elder generation slow cooling.
Wherein, the retarded cooling process is：Roller stock buries more than sand slow cooling 72h into burial pit after forging, and when roller stock temperature
Less than 100 DEG C go out hole, go out hole after again slow cooling be no more than 8h.
The test result of materialsing of the material of hot straightening roll as obtained in the preparation method of the present embodiment is as follows：
Body hardness is 36HRC；
Rm (tensile strength) is 1190MPa；
Rel (yield strength) is 925MPa；
Aku (impact absorbing energy) is 13.3J；
Microscopic structure is tempered sorbite+carbide, and grain size is 10 grades；
Case hardness is 60HRC, is 57HRC in the hardness at the 12mm of surface.
Embodiment 3：
A kind of preparation method of cut deal hot straightening roll, comprises the following steps：
The first step, melting roller stock steel：
The percentage by weight of each component is in the roller stock steel：
Second step, ladle refining：
The molten steel that the first step is produced is refined using ladle refining furnace, is de-gassed place to molten steel under vacuum
Reason；
3rd step, ingot casting：
Ingot casting is carried out under inert gas shielding；
4th step, forging roller stock：
Using the forged technique manufacture of ingot casting obtained in upper step, using 6000 tons of press, forging compression ratio is more than 4 to roller stock；
The forging technology is：1160 DEG C of heating, initial forging temperature is 1090 DEG C, 950 DEG C of final forging temperature；
Annealed immediately after forging；
5th step, Surface heat-treatent：
Through 1000HZ, 1050 DEG C of mid frequency induction hardenings are processed and 550 DEG C of tempers.
Wherein, the above-mentioned first step is carried out in electric arc furnaces.
Wherein, it is described to be annealed into spheroidizing.
Wherein, after forging roller stock through annealing process before processing elder generation slow cooling.
Wherein, the retarded cooling process is：Roller stock buries more than sand slow cooling 72h into burial pit after forging, and when roller stock temperature
Less than 100 DEG C go out hole, go out hole after again slow cooling be no more than 8h.
The test result of materialsing of the material of hot straightening roll as obtained in the preparation method of the present embodiment is as follows：
Body hardness is 37HRC；
Rm (tensile strength) is 1160MPa；
Rel (yield strength) is 915MPa；
Aku (impact absorbing energy) is 11.5J；
Microscopic structure is tempered sorbite+carbide, and grain size is 9 grades；
Case hardness is 59HRC, is 56HRC in the hardness at the 12mm of surface.
Large-scale thermal straightening machine has been passed through using hot straightening roll obtained in preparation method of the present invention in above-described embodiment 1 to 3
Using examination.The hot straightening roll has high intensity and good combination property, compared with traditional hot straightening roll have with
Lower advantage：
1) work top layer has obdurability high at high temperature, with heat resistanceheat resistant alternate load ability higher, shock resistance energy
Power, it is to avoid tired chip off-falling；
2) performance is excellent, and compared with existing hot straightening roll roller, hardness, wearability, depth of hardening zone and plasticity and toughness are equal
There is a raising in various degree, hot straightening roll working surface and prescribed depth surface hardness is high and good stability in hot state so that
The wear resistance at elevated temperature of the product is much better than existing 60CrMoV rollers and H13；
3) with water vapor corrosive nature higher, oxidative wear is reduced, it is to avoid because of the product of surface steam oxidation corrosion
Oxide skin with hot surface of steel plate is adhered repeatedly, and influence is straightened the surface quality of steel plate；
4) body of roll axial property is uniform and is slowly reduced because quenching degree causes well hardened layer hardness so that working roll uniformly delays
Slow abrasion, greatly improves the roller life-span.Compared with existing roll matter steel, major ingredient cost increases, but manufacturing cost reduction, total raw
Cost is produced to decline.Steel grade mechanical property is optimized, cost performance is high.
5) quenching degree of steel grade is high, and Technological adaptability is strong, using water as hardening media, is adjusted in cooling water inflow and power
Also hardening break is not produced in the case of by a relatively large margin.Product yield is high, production technology it is easily controllable and grasp, quality of item and
Structure property reaches the requirement of regulation.
The above is only the preferred embodiment of the present invention, need to point out it is not depart from this skill for those skilled in the art
On the premise of art scheme, some deformations and improvement can also be made, above-mentioned deformation and improved technical scheme equally should be considered as
Enter this application claims scope.
Claims (5)
1. a kind of preparation method of cut deal hot straightening roll, it is characterised in that：Comprise the following steps：
The first step, melting roller stock steel：
The percentage by weight of each component is in the roller stock steel：
Second step, ladle refining：
The molten steel that the first step is produced is refined using ladle refining furnace, is de-gassed treatment to molten steel under vacuum；
3rd step, ingot casting：
Ingot casting is carried out under vacuum or inert gas shielding；
4th step, forging roller stock：
Roller stock is more than 4 using the forged technique manufacture of ingot casting obtained in upper step, forging compression ratio；
The forging technology is：1100 DEG C~1160 DEG C heating, initial forging temperature be 1050 DEG C~1100 DEG C, final forging temperature >=820
℃；
Forging after annealing；
5th step, Surface heat-treatent：
Through 1000Hz, 1020 DEG C~1100 DEG C mid frequency induction hardenings are processed and 550 DEG C of tempers；
The microscopic structure of the material of hot straightening roll is as obtained in the preparation method of this cut deal hot straightening roll：Tempered sorbite and
Carbide.
2. the preparation method of cut deal hot straightening roll according to claim 1, it is characterised in that：The above-mentioned first step is in electric arc
Carried out in stove.
3. the preparation method of cut deal hot straightening roll according to claim 1, it is characterised in that：It is described to be annealed into nodularization and move back
Fire.
4. the preparation method of cut deal hot straightening roll according to claim 3, it is characterised in that：Roller stock is through ball after forging
First slow cooling before annealing PROCESS FOR TREATMENT.
5. the preparation method of cut deal hot straightening roll according to claim 4, it is characterised in that：The retarded cooling process is：
Roller stock buries more than sand slow cooling 72h into burial pit after forging, and when roller stock temperature goes out hole less than 100 DEG C, goes out behind hole slow cooling again not
More than 8h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610222223.1A CN105648349B (en) | 2016-04-11 | 2016-04-11 | A kind of preparation method of cut deal hot straightening roll |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610222223.1A CN105648349B (en) | 2016-04-11 | 2016-04-11 | A kind of preparation method of cut deal hot straightening roll |
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| JPS60243249A (en) * | 1984-05-16 | 1985-12-03 | Hitachi Metals Ltd | Steel for bearing having high resistance to temper softening |
| JP2001098352A (en) * | 1999-09-29 | 2001-04-10 | Sanyo Special Steel Co Ltd | High corrosion resistant free-cutting stainless steel excellent in surface finish characteristic |
| CN102108469A (en) * | 2010-10-26 | 2011-06-29 | 常州宝菱重工机械有限公司 | Hot rolling hot straightening roll suitable for thick steel plates with thickness of less than or equal to 60mm and preparation method thereof |
| CN102618788A (en) * | 2012-03-29 | 2012-08-01 | 宝山钢铁股份有限公司 | Support roll with high abrasion resistant performance and manufacturing method thereof |
| CN103436802A (en) * | 2013-07-31 | 2013-12-11 | 中钢集团邢台机械轧辊有限公司 | Hot roll for rolling titanium plate and manufacturing method of hot roll |
| CN104946982A (en) * | 2014-03-25 | 2015-09-30 | 宝山钢铁股份有限公司 | Wide thick plate hot-straightening machine working roll and manufacturing method thereof |
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| JPS59179761A (en) * | 1983-03-30 | 1984-10-12 | Daido Steel Co Ltd | Tool steel |
| JPS60243249A (en) * | 1984-05-16 | 1985-12-03 | Hitachi Metals Ltd | Steel for bearing having high resistance to temper softening |
| JP2001098352A (en) * | 1999-09-29 | 2001-04-10 | Sanyo Special Steel Co Ltd | High corrosion resistant free-cutting stainless steel excellent in surface finish characteristic |
| CN102108469A (en) * | 2010-10-26 | 2011-06-29 | 常州宝菱重工机械有限公司 | Hot rolling hot straightening roll suitable for thick steel plates with thickness of less than or equal to 60mm and preparation method thereof |
| CN102618788A (en) * | 2012-03-29 | 2012-08-01 | 宝山钢铁股份有限公司 | Support roll with high abrasion resistant performance and manufacturing method thereof |
| CN103436802A (en) * | 2013-07-31 | 2013-12-11 | 中钢集团邢台机械轧辊有限公司 | Hot roll for rolling titanium plate and manufacturing method of hot roll |
| CN104946982A (en) * | 2014-03-25 | 2015-09-30 | 宝山钢铁股份有限公司 | Wide thick plate hot-straightening machine working roll and manufacturing method thereof |
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Address after: 400084 No. 2, Magnesium Bridge Road, Area A, Jianqiao Industrial Park, Dadukou District, Chongqing Patentee after: Baowu Teye Hangyan Technology Co.,Ltd. Address before: 400084 No. 2, Magnesium Bridge Road, Area A, Jianqiao Industrial Park, Dadukou District, Chongqing Patentee before: CHONGQING IRON & STEEL INSTITUTE Co.,Ltd. |