CN109047600A - The forging method of cold rolling roller stock - Google Patents
The forging method of cold rolling roller stock Download PDFInfo
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- CN109047600A CN109047600A CN201811102246.4A CN201811102246A CN109047600A CN 109047600 A CN109047600 A CN 109047600A CN 201811102246 A CN201811102246 A CN 201811102246A CN 109047600 A CN109047600 A CN 109047600A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K29/00—Arrangements for heating or cooling during processing
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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
- C21D1/26—Methods of annealing
- C21D1/32—Soft annealing, e.g. spheroidising
-
- 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
- C21D3/00—Diffusion processes for extraction of non-metals; Furnaces therefor
- C21D3/02—Extraction of non-metals
- C21D3/06—Extraction of hydrogen
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
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- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
- Forging (AREA)
Abstract
The present invention relates to the forging methods of cold rolling roller stock, belong to technical field of ferrous metallurgy.To be solved by this invention is that existing forging technology is difficult to the problem of effectively controlling cold rolling roller stock hydrogen content, and there is provided the forging methods of cold rolling roller stock for technical solution: steel ingot is carried out jumping-up three times and pulling to get cold rolling roller stock；Wherein, the shove charge of gained blank is subjected to annealing after second of upsetting pull and expands hydrogen processing, the process conditions of hydrogen processing are expanded in the annealing are as follows: shove charge furnace temperature is by 500 ± 10 DEG C of controls, soaking time is 8~12 hours, then heats to 860 ± 10 DEG C, soaking time is 13~18 hours, finally it is cooled to 750 ± 10 DEG C, heat preservation 16~20 hours, furnace cooling is to 350 ± 50 DEG C.The method of the present invention is particularly suitable for the forging of 8Cr5MoV, Cr5, MC5D cold rolling roller stock.
Description
Technical field
The present invention relates to the forging methods of cold rolling roller stock, belong to technical field of ferrous metallurgy.
Background technique
Cold roll is the high-tech product of quality requirement highest and manufacturing process complexity in roll class product, at present city of the country
The common cold roll for mainly having the types such as 8Cr5MoV, Cr5, MC5D on field.By taking Cr5 type forging steel cold roll as an example, rule are commonly used
Lattice are 300mm~600mm, and because being produced using forging method, when deformation keeps interior tissue fine and closely woven based on three-dimensional compressive stress, greatly
The internal soundnesses such as big improvement the loose of steel ingot, shrinkage cavity, centre burst, can increase the anti-accident ability of forging steel cold roll；In addition,
Since the steel grade has good harden ability, there is high wearability and service life and be widely used.
CN 105624565A discloses one kind and exempts from chromium plating cold roll and its manufacturing method, method includes the following steps: A,
Refining steel ingot: raw material is subjected to preliminary melting in electric arc furnaces, molten steel is placed in ladle refining furnace to molten steel after the completion of melting
It refines and carries out vacuum degassing, after the completion of liquid steel refining, be molded into electrode ingot, Electro Slag Remelting Steel is made using electro-slag re-melting method later
Ingot；B, it forges steel billet: steel billet is made by heating, heat preservation, jumping-up and pulling in electroslag ingot made from step A；C, preparation heat
Processing: by steel billet made from step B be first heated to 980 DEG C heat preservation after quenching, be again heated to 820 DEG C heat preservation after it is air-cooled, most
After carry out tempering, tempering temperature is 650 DEG C；D, machining and final heat treatment: will be after step C conditioning treatment
Steel billet carries out roughing；After examining qualification through ultrasonic examination, continuous induction hardening, hardening heat are carried out to the surface layer of steel billet
It is 1050~1150 DEG C, steel billet is subjected to tempering later, tempering temperature is 450~550 DEG C, and room temperature is air-cooled to after heat preservation；
After the completion of tempering, steel billet is finished by required size, cold roll is made.Though it is related to forging steel billet in this method step A,
But there is no the concrete technologies of open forging steel billet.
Currently, especially will for the cold roll roller stock that high quality how is prepared by reasonable forging technology
The control of its hydrogen content is in 1ppm hereinafter, there is no effective solution method.
Summary of the invention
The purpose of the present invention is to provide the forging methods of cold rolling roller stock, are difficult to effectively control to solve existing forging technology
The problem of cold rolling roller stock hydrogen content.
The present invention provides the forging methods of cold rolling roller stock: steel ingot is subjected to jumping-up three times and is pulled out to get cold rolling roller stock,
Wherein, the shove charge of gained blank is subjected to annealing after second of upsetting pull and expands hydrogen processing, the process conditions of hydrogen processing are expanded in the annealing are as follows:
For shove charge furnace temperature by 500 ± 10 DEG C of controls, soaking time is 8~12 hours, then heats to 860 ± 10 DEG C, soaking time 13
~18 hours, 750 ± 10 DEG C are finally cooled to, keeps the temperature 16~20 hours, furnace cooling is to 350 ± 50 DEG C；
The chemical component of the steel ingot is by percentage to the quality are as follows: C0.80%~0.92%, Si0.40%~0.85%,
Mn0.30%~0.70%, P≤0.015%, S≤0.010%, Cr4.7%~5.3%, Mo0.25%~0.50%,
V0.20%~0.40, Ni0.1%~0.30, Al0.010%~0.040%, Re+Ce0.05%~0.25%,
H≤1.5ppm, O≤30ppm, N≤120ppm, surplus Fe.
Preferably, the annealing expands hydrogen processing furnace cooling to 350 ± 10 DEG C.
Further, the forging method meets at least one of following:
Starting forging temperature >=1050 DEG C of each upsetting pull, final forging temperature >=870 DEG C；
Heating is melted down after first time upsetting pull, for shove charge furnace temperature by 1195 ± 10 DEG C of controls, soaking time is 2~5 hours；
Annealing, which is expanded after hydrogen processing, melts down heating by following process conditions: shove charge furnace temperature is controlled by 550 ± 10 DEG C, soaking time
It is 6~10 hours, then heats to 850 ± 10 DEG C, soaking time is 6~10 hours, then heats to 1235 ± 10 DEG C, heat preservation
Time is 40~55 hours, is finally cooled to 1195 ± 10 DEG C, soaking time is 2~6 hours；
Heating is melted down after third time upsetting pull, for shove charge furnace temperature by 1195 ± 10 DEG C of controls, soaking time is 2~5 hours.
Further, gained blank is cooled to 400~450 DEG C after second of upsetting pull and carries out annealing expansion hydrogen processing again.
Preferably, gained blank mist is cooled to 400~450 DEG C after second of upsetting pull and carries out annealing expansion hydrogen processing again.
Further, the diameter of the steel ingot is Φ 730mm~1600mm.
Further, the forging method meets at least one of following:
The upset ratio of each jumping-up is 1/2；
Each upsetting pull first carries out jumping-up, then pulls out, and pulling uses FM method；
The deformation process of pulling is controlled by unilateral 20~50mm of drafts, is become again by " light-weight-is light " control, light deflection
Shape amount presses unilateral 120~160mm of drafts, and feed is 300~400mm；
Third time pulling reinforces deformation using wrestling, it is ensured that whole branch roll has >=20% deflection；
Diameter by cold rolling roller stock obtained by upsetting pull three times is Φ 300mm~600mm.
The present invention provides the cooling after forged methods of cold rolling roller stock: mist is cooled to 400~450 DEG C, wherein the cold rolling roller stock
It is to be obtained according to above-mentioned forging method.
Further, the cooling after forged method further includes following steps: shove charge after mist is cold, shove charge furnace temperature by 430 ±
10 DEG C of controls, with cooling velocity furnace cooling 24 hours of 10~30 DEG C/h.
The present invention provides the manufacturing methods of cold rolling roller stock, include the following steps:
A, the heating of steel ingot: steel ingot shove charge is heated, and for shove charge furnace temperature by 550 ± 10 DEG C of controls, soaking time is 6~10 small
When, 850 ± 10 DEG C are then heated to, soaking time is 6~10 hours, then heats to 1235 ± 10 DEG C, soaking time 40
~55 hours, 1195 ± 10 DEG C are finally cooled to, soaking time is 2~6 hours, comes out of the stove and starts to forge；
B, it flat-die forging: is forged according to above-mentioned forging method；
C, it cooling after forged: is cooled down according to above-mentioned cooling after forged method；
D, be heat-treated to get.
Further, step D successively uses normalizing+spheroidizing+expansion hydrogen technique to be heat-treated, wherein
The normalizing process condition are as follows: shove charge furnace temperature is by 500~600 DEG C of controls, with 50~100 DEG C after shove charge
The heating rate of/h is warming up to 950 ± 10 DEG C, and soaking time is 5~10 hours, is subsequently cooled to 250~350 DEG C；
The annealing process condition are as follows: 850 ± 10 DEG C are warming up to the heating rate of 80~120 DEG C/h, when heat preservation
Between be 10~15 hours, then cool to 750 ± 10 DEG C with the furnace with the cooling velocity of 20~50 DEG C/h；
The expansion hydrogen process conditions are as follows: furnace temperature is by 750 ± 10 DEG C of controls, soaking time 22~25 hours, then with 10~
The cooling velocity of 30 DEG C/h is cooled to 500 ± 10 DEG C, can come out of the stove.
Preferably, it comes out of the stove in the normalising step air-cooled to 300~320 DEG C.
The present invention provides the cold rolling roller stocks obtained using above-mentioned manufacturing method.
The present invention provides the forging methods of cold rolling roller stock can be by gained roller stock by reasonable forging technology design
Hydrogen content be efficiently controlled in 1ppm hereinafter, avoiding the occurrence of white point and the underproof situation of flaw detection, be particularly suitable for
The forging of 8Cr5MoV, Cr5, MC5D cold roll steel ingot.The present invention still further provides the whole series of the above-mentioned type cold rolling roller stock
Manufacturing method, the roller stock inside and outside surface quality being prepared using the method for the present invention is good, and field trash is low, spherodized structure crystal grain
Carefully, carbide rank is low, and the hardness after heat treatment is lower than standard requirements, meets user's requirement.Specific inspection result is as follows:
(1) non-metallic inclusion: 0.0~0.5 grade of A class, 0.0~0.5 grade of B class, 0.0~0.5 grade of C class,
0.0~0.5 grade of D class, 0.0~0.5 grade of DS class.
(2) 0.0~1.5 grade of net carbide, 0.5~2.0 grade of Aliquation carbide.
(3) spherodized structure: 1.0~2.5 grades.
(4) [H] content is less than or equal to 1ppm.
(5) HBW is less than or equal to 25.
The above all technical is all satisfied standard requirements, guarantees that product quality provides advantageous item for final heat treatment
Part.
Specific embodiment
Raw material, equipment used in the specific embodiment of the invention are known product, are obtained by purchase commercial product.
The present invention provides the forging methods of cold rolling roller stock: steel ingot is carried out jumping-up three times and pulling to get cold rolling roller stock；
Wherein, the shove charge of gained blank is subjected to annealing after second of upsetting pull and expands hydrogen processing, the process conditions of hydrogen processing are expanded in the annealing are as follows:
For shove charge furnace temperature by 500 ± 10 DEG C of controls, soaking time is 8~12 hours, then heats to 860 ± 10 DEG C, soaking time 13
~18 hours, 750 ± 10 DEG C are finally cooled to, keeps the temperature 16~20 hours, furnace cooling is to 350 ± 50 DEG C；
The chemical component of the steel ingot is by percentage to the quality are as follows: C0.80%~0.92%, Si0.40%~0.85%,
Mn0.30%~0.70%, P≤0.015%, S≤0.010%, Cr4.7%~5.3%, Mo0.25%~0.50%,
V0.20%~0.40, Ni0.1%~0.30, Al0.010%~0.040%, Re+Ce0.05%~0.25%,
H≤1.5ppm, O≤30ppm, N≤120ppm, surplus Fe.
The key point of above-mentioned forging method is that special annealing is carried out after second of upsetting pull expands hydrogen processing, by above-mentioned
Operation can ensure that structural stress release and hydrogen diffusion also can control hydrogen content in 1ppm hereinafter, keeping away even if producing in rainy season
Exempt from white point and the underproof situation of flaw detection occur.
In addition, the present invention pulls out technique using three piers three, increase deflection, thinning microstructure can improve to the full extent
The mass defects such as the loose, shrinkage cavity of interiors of products.
Further, pulling uses FM method, and for the deformation process of pulling by " light-weight-is light " control, light deflection presses unilateral pressure
20~50mm of lower amount control, weight deflection press unilateral 120~160mm of drafts, and feed is 300~400mm.Wherein, become again
Shape amount is key process parameter, and control weight deflection presses unilateral 120~160mm of drafts, convenient for being crushed coarse crystal grain, soldering
Loose, shrinkage cavity reduces the space of hiding oneself of hydrogen, after two upsettings two pull into square, is conducive to the evolution of hydrogen.
Further, third time pulling reinforces deformation using wrestling, it is ensured that whole branch roll has >=20% deflection.This step
Operation not only may insure that roller stock outer surface quality is good, but also can reinforce being conducive to deformation uniform inside roll blank
Micro-crack is closed in forging, guarantees inner surface quality.
The present invention also provides the cooling after forged methods of above-mentioned cold rolling roller stock: mist is cooled to 400~450 DEG C.
400~450 DEG C are cooled to using the cold mode of mist after forging, the precipitation of carbide can be reduced, it is ensured that Aliquation carbide
≤ 1.5 grades.
Further, the cooling after forged method further includes following steps: shove charge after mist is cold, and shove charge furnace temperature presses 430 ± 10
DEG C control, with cooling velocity furnace cooling 24 hours of 10~30 DEG C/h.
It is fitted into furnace after mist is cold, according to above-mentioned process conditions furnace cooling, facilitates slow release thermal stress and tissue is answered
Power avoids the occurrence of stress and concentrates, cold rolling roller stock is caused stress cracking occur when being heat-treated.
Embodiment 1 produces cold rolling roller stock using the method for the present invention
The present embodiment produces Φ 570mm cold rolling roller stock using Φ 1600mm ESR ingot, the specific steps are as follows:
A, raw material is carried out to preliminary melting in electric arc furnaces, molten steel is placed in ladle refining furnace to molten steel after the completion of melting
Refining, and is adjusted by component requirements, then carries out vacuum degassing, after the completion of liquid steel refining, is molded into Φ 730mm ripple ingot
Electrode bar.
B, cast 2 Φ 730mm ripple ingot electrode bars are subjected to electroslag remelting by special process, are then moved back
Fire processing, the φ 1600mm electroslag ingot after being annealed.The chemical component of steel ingot is by percentage to the quality are as follows: and C0.80%~
0.92%, Si0.40%~0.85%, Mn0.30%~0.70%, P≤0.015%, S≤0.010%, Cr4.7%~
5.3%, Mo0.25%~0.50%, V0.20%~0.40, Ni0.1%~0.30, Al0.010%~0.040%, Re+
Ce0.05%~0.25%, H≤1.5ppm, O≤30ppm, N≤120ppm, surplus Fe.
C, electroslag ingot is packed into roller hearth furnace heating: for shove charge furnace temperature by 550 ± 10 DEG C of controls, soaking time is 10 small
When, 850 ± 10 DEG C of controls are then heated to, soaking time is 10 hours, then heats to 1235 ± 10 DEG C of controls, soaking time
It is 55 hours, is finally cooled to 1195 ± 10 DEG C of controls, soaking time is 6 hours, comes out of the stove and starts to forge.
D, technological forming is pulled out using three piers three:
(1) flat-die forging machine station, first first time jumping-up, upset ratio 1/2 are hung after electroslag ingot is come out of the stove；Then it carries out
Pulling deformation for the first time, using wrong half anvil overlapping, deformation process presses unilateral drafts by " light-weight-is light " control, light deflection
50mm control, weight deflection press unilateral drafts 160mm, and feed is 400mm.Starting forging temperature >=1050 DEG C, final forging temperature
≥870℃.First time upsetting pull technique obtains 800 × 800mm square size.
(2) the square steel billet for obtaining first time upsetting pull is heated using traveling crane to roller hearth furnace, and heating temperature presses 1195
± 10 DEG C of controls, soaking time are 5 hours.
(3) by the steel billet of (2) the step of homogeneous heating, second of jumping-up, upset ratio 1/2 are carried out；It is carried out using FM method
Pulling, in favor of soldering center portion shrinkage cavity and loose.Using wrong half anvil overlapping, deformation process is light to deform by " light-weight-is light " control
Amount is controlled by unilateral drafts 50mm, and weight deflection presses unilateral drafts 160mm, and feed is 400mm.Starting forging temperature >=
1050 DEG C, final forging temperature >=870 DEG C.Second of upsetting pull technique obtains 700 × 700mm square size.
(4) steel billet for obtaining step (3), is transported to chain-type cooling bed, and mist is as cold as 400~450 DEG C, is then charged into roller-bottom type
Furnace annealed and expanded hydrogen processing.For shove charge furnace temperature by 500 ± 10 DEG C of controls, soaking time is 12 hours, then heat to 860 ±
10 DEG C of controls, soaking time are 18 hours, are finally cooled to 750 ± 10 DEG C and carry out expanding hydrogen processing, and soaking time is 20 hours, with
Furnace is come out of the stove when being cooled to 350 ± 10 DEG C.
(5) steel billet that step (4) obtains is heated by step c.
(6) by the steel billet after step (5) heating, last time jumping-up+pulling is carried out, is pulled out using FM method, used
Wrong half anvil overlapping, deformation process are controlled by " light-weight-is light " control, light deflection by unilateral drafts 20mm, and weight deflection is by single
Side drafts 120mm, feed are 300mm, and the later period is round as a ball using arc anvil.Starting forging temperature >=1050 DEG C, final forging temperature >=
870℃.Third time upsetting pull technique obtainsThen billet is deformed using wrestling, reinforce to uniform inside roll blank
Deformation obtained in order to forge conjunction micro-crackBillet.
(7) willBillet shove charge, for heating temperature by 1195 ± 10 DEG C of controls, soaking time is 2.5 hours.
(8) it is formed after coming out of the stove by the size requirement of head, middle and end, specific size requires to be (outer diameter * length)
E. roller stock after molding is transported to chain-type cooling bed, is cooled to 420~440 DEG C using the cold mode of mist, then quickly
It is transported to roller hearth furnace, furnace temperature is by 430 ± 10 DEG C of controls, to come out of the stove after speed furnace cooling 24 hours of 20 ± 10 DEG C/h.
F. stove will be packed into the cold roller stock come out of the stove of furnace to be heat-treated, heat treatment process uses normalizing+spheroidizing+expansion
Hydrogen technique finally obtains qualified cold rolling roller stock.Heat treatment process specific requirement are as follows:
(1) normalizing process condition are as follows: shove charge furnace temperature is by 500~600 DEG C of controls, with the heating rate liter of 60 DEG C/h after shove charge
For temperature to 950 ± 10 DEG C, soaking time is 6 hours, is then come out of the stove air-cooled to 300~320 DEG C；
(2) annealing process condition are as follows: be warming up to 850 ± 10 DEG C with the heating rate of 100 DEG C/h, soaking time 15
Hour, then 750 ± 10 DEG C are cooled to the furnace with the cooling velocity of 20 DEG C/h；
(3) expanding hydrogen process conditions are as follows: furnace temperature is controlled by 750 ± 10 DEG C, and soaking time 25 hours, then with the cold of 25 DEG C/h
But speed furnace cooling, until 500 ± 10 DEG C of whens come out of the stove it is air-cooled.
The present embodiment uses the Φ 570mm cold rolling roller stock of Φ 1600mm electroslag ingot production, and outer surface quality is good, does not have
There is the defects of the defects of pit, folding, crackle, not super the loose of flaw detection rank requirement of inner surface, shrinkage cavity, steel is pure,
Specific examination of nonmetallic inclusion result are as follows: 0 grade of A class, 0.5 grade of B class, 0 grade of C class, 0 grade of D class, DS0 grades, net carbide 1.0
Grade, 0.5 grade of Aliquation carbide, 1.5 grades of spherodized structure, hydrogen content 0.8ppm, hardness number is after step f heat treatment
230HBW。
Embodiment 2 produces cold rolling roller stock using the method for the present invention
The present embodiment produces Φ 300mm cold rolling roller stock using Φ 730mm ESR ingot, the specific steps are as follows:
A, raw material is carried out to preliminary melting in electric arc furnaces, molten steel is placed in ladle refining furnace to molten steel after the completion of melting
Refining, and is adjusted by component requirements, then carries out vacuum degassing, after the completion of liquid steel refining, is molded into Φ 570mm ripple ingot
Electrode bar.
B, cast 2 Φ 570mm ripple ingot electrode bars are subjected to electroslag remelting by special process, are then moved back
Fire processing, the φ 730mm electroslag ingot after being annealed.The chemical component of steel ingot is by percentage to the quality are as follows: and C0.80%~
0.92%, Si0.40%~0.85%, Mn0.30%~0.70%, P≤0.015%, S≤0.010%, Cr4.7%~
5.3%, Mo0.25%~0.50%, V0.20%~0.40, Ni0.1%~0.30, Al0.010%~0.040%, Re+
Ce0.05%~0.25%, H≤1.5ppm, O≤30ppm, N≤120ppm, surplus Fe.
C, electroslag ingot is packed into roller hearth furnace heating: for shove charge furnace temperature by 550 ± 10 DEG C of controls, soaking time is 6 hours,
850 ± 10 DEG C of controls are then heated to, soaking time is 6 hours, then heats to 1235 ± 10 DEG C of controls, soaking time 40
Hour, 1195 ± 10 DEG C of controls are finally cooled to, soaking time is 2 hours, comes out of the stove and starts to forge.
D, technological forming is pulled out using three piers three:
(1) flat-die forging machine station, first first time jumping-up, upset ratio 1/2 are hung after electroslag ingot is come out of the stove；Then it carries out
Pulling deformation for the first time, using wrong half anvil overlapping, deformation process presses unilateral drafts by " light-weight-is light " control, light deflection
20mm control, weight deflection press unilateral drafts 120mm, and feed is 300mm.Starting forging temperature >=1050 DEG C, final forging temperature
≥870℃.First time upsetting pull technique obtains 600 × 600mm square size.
(2) the square steel billet for obtaining first time upsetting pull is heated using traveling crane to roller hearth furnace, and heating temperature presses 1195
± 10 DEG C of controls, soaking time are 2 hours.
(3) by the steel billet of (2) the step of homogeneous heating, second of jumping-up, upset ratio 1/2 are carried out；It is carried out using FM method
Pulling, in favor of soldering center portion shrinkage cavity and loose.Using wrong half anvil overlapping, deformation process is light to deform by " light-weight-is light " control
Amount is controlled by unilateral drafts 20mm, and weight deflection presses unilateral drafts 120mm, and feed is 300mm.Starting forging temperature >=
1050 DEG C, final forging temperature >=870 DEG C.Second of upsetting pull technique obtains 450 × 450mm square size.
(4) steel billet for obtaining step (3), is transported to chain-type cooling bed, and mist is as cold as 400~450 DEG C, is then charged into roller-bottom type
Furnace annealed and expanded hydrogen processing.For shove charge furnace temperature by 500 ± 10 DEG C of controls, soaking time is 8 hours, then heat to 860 ±
10 DEG C of controls, soaking time are 13 hours, are finally cooled to 750 ± 10 DEG C and carry out expanding hydrogen processing, and soaking time is 16 hours, with
Furnace is come out of the stove when being cooled to 350 ± 10 DEG C.
(5) steel billet that step (4) obtains is heated by step c.
(6) by the steel billet after step (5) heating, last time jumping-up+pulling is carried out, is pulled out using FM method, used
Wrong half anvil overlapping, deformation process are controlled by " light-weight-is light " control, light deflection by unilateral drafts 20mm, and weight deflection is by single
Side drafts 120mm, feed are 300mm, and the later period is round as a ball using arc anvil.Starting forging temperature >=1050 DEG C, final forging temperature >=
870℃.Third time upsetting pull technique obtainsThen billet is deformed using wrestling, reinforce to uniform inside roll blank
Deformation obtained in order to forge conjunction micro-crackBillet.
(7) willBillet shove charge, for heating temperature by 1195 ± 10 DEG C of controls, soaking time is 2 hours.
(8) it is formed after coming out of the stove by the size requirement of head, middle and end, specific size requires to be (outer diameter * length)
E. roller stock after molding is transported to chain-type cooling bed, is cooled to 420~440 DEG C using the cold mode of mist, then quickly
It is transported to roller hearth furnace, furnace temperature is by 430 ± 10 DEG C of controls, to come out of the stove after speed furnace cooling 24 hours of 20 ± 10 DEG C/h.
F. stove will be packed into the cold roller stock come out of the stove of furnace to be heat-treated, heat treatment process uses normalizing+spheroidizing+expansion
Hydrogen technique finally obtains qualified cold rolling roller stock.Heat treatment process specific requirement are as follows:
(1) normalizing process condition are as follows: shove charge furnace temperature is by 500~600 DEG C of controls, with the heating rate liter of 50 DEG C/h after shove charge
For temperature to 950 ± 10 DEG C, soaking time is 5 hours, is then come out of the stove air-cooled to 300~320 DEG C；
(2) annealing process condition are as follows: be warming up to 850 ± 10 DEG C with the heating rate of 80 DEG C/h, soaking time 10
Hour, then 750 ± 10 DEG C are cooled to the furnace with the cooling velocity of 20 DEG C/h；
(3) expanding hydrogen process conditions are as follows: furnace temperature is controlled by 750 ± 10 DEG C, and soaking time 22 hours, then with the cold of 10 DEG C/h
But speed furnace cooling, until 500 ± 10 DEG C of whens come out of the stove it is air-cooled.
Claims (10)
1. the forging method of cold rolling roller stock, it is characterized in that: steel ingot is carried out jumping-up three times and pulling to get cold rolling roller stock, wherein
The shove charge of gained blank is subjected to annealing after second of upsetting pull and expands hydrogen processing, the process conditions of hydrogen processing are expanded in the annealing are as follows: shove charge
For furnace temperature by 500 ± 10 DEG C of controls, soaking time is 8~12 hours, then heats to 860 ± 10 DEG C, soaking time is 13~18
Hour, 750 ± 10 DEG C are finally cooled to, keeps the temperature 16~20 hours, furnace cooling is to 350 ± 50 DEG C；Preferably, with furnace
It is cooled to 350 ± 10 DEG C；
The chemical component of the steel ingot is by percentage to the quality are as follows: C0.80%~0.92%, Si0.40%~0.85%,
Mn0.30%~0.70%, P≤0.015%, S≤0.010%, Cr4.7%~5.3%, Mo0.25%~0.50%,
V0.20%~0.40, Ni0.1%~0.30, Al0.010%~0.040%, Re+Ce0.05%~0.25%, H≤1.5ppm,
O≤30ppm, N≤120ppm, surplus Fe.
2. forging method as described in claim 1, it is characterized in that: meeting at least one of following:
Starting forging temperature >=1050 DEG C of each upsetting pull, final forging temperature >=870 DEG C；
Heating is melted down after first time upsetting pull, for shove charge furnace temperature by 1195 ± 10 DEG C of controls, soaking time is 2~5 hours；
Annealing, which is expanded after hydrogen processing, melts down heating by following process conditions: shove charge furnace temperature is controlled by 550 ± 10 DEG C, soaking time 6
~10 hours, then heat to 850 ± 10 DEG C, soaking time is 6~10 hours, 1235 ± 10 DEG C is then heated to, when heat preservation
Between be 40~55 hours, be finally cooled to 1195 ± 10 DEG C, soaking time is 2~6 hours；
Heating is melted down after third time upsetting pull, for shove charge furnace temperature by 1195 ± 10 DEG C of controls, soaking time is 2~5 hours.
3. forging method as claimed in claim 1 or 2, it is characterized in that: gained blank is cooled to 400 after second of upsetting pull~
450 DEG C carry out annealing again and expand hydrogen processing；Preferably, mist is cooled to 400~450 DEG C.
4. the forging method as described in claims 1 to 3 any one, it is characterized in that: the diameter of the steel ingot be Φ 730mm~
1600mm。
5. forging method as claimed in claim 4, it is characterized in that: meeting at least one of following:
The upset ratio of each jumping-up is 1/2；
Each upsetting pull first carries out jumping-up, then pulls out, and pulling uses FM method；
The deformation process of pulling is controlled by " light-weight-is light " control, light deflection by unilateral 20~50mm of drafts, weight deflection
By unilateral 120~160mm of drafts, feed is 300~400mm；
Third time pulling reinforces deformation using wrestling, it is ensured that whole branch roll has >=20% deflection；
Diameter by cold rolling roller stock obtained by upsetting pull three times is Φ 300mm~600mm.
6. the cooling after forged method of cold rolling roller stock, it is characterized in that: mist is cooled to 400~450 DEG C, wherein the cold rolling roller stock is root
It is obtained according to forging method described in Claims 1 to 5 any one.
7. cooling after forged method as claimed in claim 6, it is characterized in that: further including following steps: shove charge after mist is cold, shove charge furnace
Temperature was by 430 ± 10 DEG C of controls, with cooling velocity furnace cooling 24 hours of 10~30 DEG C/h.
8. the manufacturing method of cold rolling roller stock, it is characterized in that: including the following steps:
A, the heating of steel ingot: steel ingot shove charge is heated, and for shove charge furnace temperature by 550 ± 10 DEG C of controls, soaking time is 6~10 hours,
850 ± 10 DEG C are then heated to, soaking time is 6~10 hours, then heats to 1235 ± 10 DEG C, soaking time is 40~55
Hour, 1195 ± 10 DEG C are finally cooled to, soaking time is 2~6 hours, comes out of the stove and starts to forge；
B, flat-die forging: forging method described in any one is forged according to claim 1~5；
C, cooling after forged: cooling after forged method according to claim 6 or 7 is cooled down；
D, be heat-treated to get.
9. manufacturing method as claimed in claim 8, it is characterized in that: step D successively uses normalizing+spheroidizing+expansion hydrogen technique
It is heat-treated, wherein
The normalizing process condition are as follows: shove charge furnace temperature is by 500~600 DEG C of controls, with the heating rate of 50~100 DEG C/h after shove charge
950 ± 10 DEG C are warming up to, soaking time is 5~10 hours, is subsequently cooled to 250~350 DEG C；Preferably, it comes out of the stove air-cooled to 300
~320 DEG C；
The annealing process condition are as follows: be warming up to 850 ± 10 DEG C with the heating rate of 80~120 DEG C/h, soaking time is
10~15 hours, 750 ± 10 DEG C then were cooled to the furnace with the cooling velocity of 20~50 DEG C/h；
The expansion hydrogen process conditions are as follows: furnace temperature by 750 ± 10 DEG C control, soaking time 22~25 hours, then with 10~30 DEG C/
The cooling velocity of h is cooled to 500 ± 10 DEG C, can come out of the stove.
10. the cold rolling roller stock obtained using the manufacturing method of claim 8 or 9.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110592341A (en) * | 2019-10-31 | 2019-12-20 | 成都先进金属材料产业技术研究院有限公司 | Annealing softening heat treatment method for rock drilling tool steel |
| CN110935838A (en) * | 2019-12-25 | 2020-03-31 | 常州常超模具有限公司 | Roller processing method suitable for improving forging penetration and shortening heat treatment period |
| CN111001740A (en) * | 2019-11-28 | 2020-04-14 | 铜陵市兆林工贸有限责任公司 | Forging method of cold-rolled roller blank |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101153377A (en) * | 2006-09-27 | 2008-04-02 | 宝山钢铁股份有限公司 | Leveler roll and manufacturing process thereof |
| CN102400048A (en) * | 2010-09-15 | 2012-04-04 | 宝山钢铁股份有限公司 | Steel for cold-rolled working roll for rolling high-strength steel, cold-rolled working roll and manufacturing method thereof |
| EP2495340A1 (en) * | 2011-03-04 | 2012-09-05 | Akers AB | A forged roll meeting the requirements of the cold rolling industry and a method for production of such a 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 |
| CN105256245A (en) * | 2015-10-15 | 2016-01-20 | 中钢集团邢台机械轧辊有限公司 | Cold rolling roller with ultra-deep hardening layer and manufacturing method of cold rolling roller |
| CN105945186A (en) * | 2016-05-14 | 2016-09-21 | 莱芜锻压有限公司 | High-carbon and high-chromium cold roll forging technology adopting diffusion during forging |
-
2018
- 2018-09-20 CN CN201811102246.4A patent/CN109047600B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101153377A (en) * | 2006-09-27 | 2008-04-02 | 宝山钢铁股份有限公司 | Leveler roll and manufacturing process thereof |
| CN102400048A (en) * | 2010-09-15 | 2012-04-04 | 宝山钢铁股份有限公司 | Steel for cold-rolled working roll for rolling high-strength steel, cold-rolled working roll and manufacturing method thereof |
| EP2495340A1 (en) * | 2011-03-04 | 2012-09-05 | Akers AB | A forged roll meeting the requirements of the cold rolling industry and a method for production of such a 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 |
| CN105256245A (en) * | 2015-10-15 | 2016-01-20 | 中钢集团邢台机械轧辊有限公司 | Cold rolling roller with ultra-deep hardening layer and manufacturing method of cold rolling roller |
| CN105945186A (en) * | 2016-05-14 | 2016-09-21 | 莱芜锻压有限公司 | High-carbon and high-chromium cold roll forging technology adopting diffusion during forging |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110592341A (en) * | 2019-10-31 | 2019-12-20 | 成都先进金属材料产业技术研究院有限公司 | Annealing softening heat treatment method for rock drilling tool steel |
| CN111001740A (en) * | 2019-11-28 | 2020-04-14 | 铜陵市兆林工贸有限责任公司 | Forging method of cold-rolled roller blank |
| CN110935838A (en) * | 2019-12-25 | 2020-03-31 | 常州常超模具有限公司 | Roller processing method suitable for improving forging penetration and shortening heat treatment period |
| CN110935838B (en) * | 2019-12-25 | 2021-05-04 | 常州常超模具有限公司 | Roller processing method suitable for improving forging penetration and shortening heat treatment period |
| CN111496153A (en) * | 2020-04-23 | 2020-08-07 | 攀钢集团江油长城特殊钢有限公司 | Forging forming process of E2 vertical roller |
| CN111496153B (en) * | 2020-04-23 | 2022-07-05 | 攀钢集团江油长城特殊钢有限公司 | Forging forming process of E2 vertical roller |
| CN111790863A (en) * | 2020-06-22 | 2020-10-20 | 宜兴市鑫源辊业有限公司 | Forging method for inhibiting strip-shaped carbide of cold-rolled roller blank |
| CN113832310A (en) * | 2021-09-07 | 2021-12-24 | 河南中原特钢装备制造有限公司 | Post-forging annealing process of large-specification Cr5 cold roll |
| CN113894242A (en) * | 2021-09-16 | 2022-01-07 | 济源市天合特钢锻压有限公司 | Roller and forging and pressing forming process thereof |
| CN113894242B (en) * | 2021-09-16 | 2024-02-20 | 济源市天合特钢锻压有限公司 | Roller and forging forming process thereof |
| CN114959202A (en) * | 2022-04-25 | 2022-08-30 | 中钢集团邢台机械轧辊有限公司 | Heat treatment method of rolling mill supporting roll |
| CN115229099A (en) * | 2022-06-09 | 2022-10-25 | 太原重工股份有限公司 | Forging method of supporting roller |
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