CN106244908B - A kind of hot continuous rolling finishing roll and its manufacture method - Google Patents
A kind of hot continuous rolling finishing roll and its manufacture method Download PDFInfo
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- CN106244908B CN106244908B CN201610729512.0A CN201610729512A CN106244908B CN 106244908 B CN106244908 B CN 106244908B CN 201610729512 A CN201610729512 A CN 201610729512A CN 106244908 B CN106244908 B CN 106244908B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C13/00—Moulding machines for making moulds or cores of particular shapes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
-
- 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
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
- C22C37/08—Cast-iron alloys containing chromium with nickel
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses a kind of hot continuous rolling finishing roll and its manufacture method, belong to the manufacturing technology field of roll, the percentage of the body of roll working lining cast including the roller core cast by spheroidal graphite cast-iron and high-alloy steel, the chemical composition of the body of roll and each composition quality is：C：2.2~2.4%, Si：0.30~1.00%, Mn：0.60~1.50%, Cr：13.00~18.00%, Ni：0.20~1.00%, Mo：0.50~0.80%, V：0.7~1.3%, N:0.1~0.2%, S≤0.05%, P≤0.1%, remaining is Fe and inevitable impurity.The present invention has good hot-cracking resistance, fatigue resistance and wearability.
Description
Technical field
The present invention relates to a kind of roll and its manufacture method, especially a kind of hot continuous rolling finishing roll and its manufacture method.
Background technology
Roll market competition is increasingly fierce, and roller performance is improved in the case where purchase cost does not change and is purchased as steel mill
The factor main of roll, it can maximumlly realize roll sale and permanent can dominate the market, to roll manufacturer
Production cost control ability propose higher, almost harsh requirement, cost declining turns into the Main Means to dominate the market；Together
When, with the horizontal continuous improvement of the development of steel industry, steel rolling, high intensity, the demand of high quality sheet material greatly improve, and this
The realization required a bit needs the support of matched high-performance roll, the weight implemented particularly with some influence national strategies
Want the rolling of steel grade more prominent for the demand of high-performance roll.
Microalloying is a kind of effective ways for improving steel performance, and microalloying is often referred in original main additional element
On the basis of add the carbon nitrogen thing formation element such as micro Nb, V, Ti again, or have an impact to mechanical property or to corrosion resistance, resistance to
Hot advantageous effect, addition with microalloying steel class and kind it is different and different, be micro- relative to main additional element
Scope is measured, addition is 0.02-0.06% as in micro alloying steel, and in heat resisting steel and stainless steel addition exists
0.5% or so, and addition is up to 1-3% in high temperature alloy.
Hot continuous rolling finishing roll is a kind of high temperature alloy roll of the long-term work under certain stress condition, and it is for high temperature
Intensity, corrosion resistance, inoxidizability under state have a very high requirement, also, its operating environment requirements its have it is good
The combination properties such as fatigue resistance, hot-cracking resistance and wearability.
The content of the invention
It is a kind of can fully meeting hot continuous rolling working environment demand that the technical problem to be solved in the invention is to provide,
There is the hot continuous rolling finishing roll and its manufacture method of good mechanical property and inoxidizability and corrosion resistance under the condition of high temperature.
In order to solve the above technical problems, the technical solution adopted in the present invention is：
A kind of hot continuous rolling finishing roll, include the body of roll work of roller core and the high-alloy steel casting cast by spheroidal graphite cast-iron
Layer, the percentage of the chemical composition of the body of roll and each composition quality is：C：2.2~2.4%, Si：0.30~1.00%, Mn：
0.60~1.50%, Cr：13.00~18.00%, Ni：0.20~1.00%, Mo：0.50~0.80%, V：0.7~1.3%, N:0.1
~0.2%, S≤0.05%, P≤0.1%, remaining is Fe and inevitable impurity.
Technical solution of the present invention further improvement is that：The chemical composition of the body of roll working lining and each composition quality
Percentage be：C：2.2~2.4%, Si：0.30~0.40%, Mn：1.20~1.50%, Cr：13.00~18.00%, Ni：0.20
~1.00%, Mo：0.50~0.80%, V：1.10~1.30%, N:0.1~0.2%, S≤0.05%, P≤0.1%, remaining be Fe and
Inevitable impurity.
A kind of manufacture method of hot continuous rolling finishing roll, comprises the following steps：
a）Smelt：Body of roll working lining is equipped with appropriate alloy as raw material using high-quality steel scrap, and various materials are accurately matched somebody with somebody
Smelted than after in induction furnace, smelting temperature is 1500 DEG C~1600 DEG C；Deoxidation is carried out to molten steel with deoxidier before coming out of the stove,
Reaction temperature is 1500 DEG C~1560 DEG C；
Roller core material is spheroidal graphite cast-iron, is smelted using the pig iron as raw material in blast furnace, and smelting temperature is 1460 DEG C~1500 DEG C,
Inovulant and nodulizer are added before coming out of the stove in molten iron；
b）Centrifugal casting：Cast first body of roll working lining, the cast temperature of molten steel is 1350 DEG C~1400 DEG C, during casting from
Scheming rotating speed is 700~900 revs/min, after the completion of body of roll working lining pouring molten steel, centrifuge speed is adjusted to 450~
550 revs/min, until the exospheric temperature of body of roll working lining is cooled to 1350 DEG C~1400 DEG C；
c）Mould assembling casting roller core：By the sandbox for body of roll working lining of having cast with being merged for the sandbox for roller core of casting；
The molten iron handled well is cast in the sandbox after merging, cast temperature is 1450 DEG C~1500 DEG C；
d）Shake out sand removal：After slow cooling 120 hours~150 hours, open sandbox in sandbox wait the roll cast and take out
Roll, the molding sand of cleaning roller surface attachment；
e）Conditioning treatment：Casting is subjected to stress relief annealing, 400 DEG C~600 DEG C of annealing temperature, soaking time 120 is small
When~200 hours, insulation terminates rear furnace cooling；
f）Machining：Roll is machined out, obtains expected size and precision；
g）Surface hardening：Roller surface is heat-treated using differential quenching method, hardening heat 800 DEG C~1100
DEG C, Quenching Soaking Time 2 hours~8 hours, cooled down using spraying or quenching mode；Then it is tempered, is returned
Fiery 450 DEG C~550 DEG C of temperature, tempering time amount to 150 hours~280 hours.
Technical solution of the present invention further improvement is that：The smelting material of the body of roll working lining includes CrN.
Technical solution of the present invention further improvement is that：The deoxidier is Al, and the deoxidier accounts for the quality of molten steel
Percentage is 0.5%~1%, and reaction temperature is 1500 DEG C~1560 DEG C during deoxidation.
Technical solution of the present invention further improvement is that：The smelting material of the body of roll working lining includes V, the V
Add in smelting furnace and smelted after deoxidier adds.
Technical solution of the present invention further improvement is that：The inovulant is ferrosilicon, and the inovulant accounts for quality of molten steel
Percentage be 0.4%~0.8%, the nodulizer be magnesium-rare earth, and the percentage that the nodulizer accounts for quality of molten steel is 1%
~1.3%.
By adopting the above-described technical solution, the technological progress that the present invention obtains is：
The present invention is realized by adding CrN compounds, and V element in the smelting material of the body of roll working lining of roll
For the microalloy treatment of high-temperature alloy steel, so as to obtaining good obdurability.V is added in body of roll working lining to be made
The crystal grain of steel is effectively refined, and in particular for the alloy of hot operation state, V element can effectively improve its hot-cracking resistance
And the wearability under the condition of high temperature.Adding CrN compounds is advantageous in that：On the one hand provide N for V element and carry out chemical combination, separately
On the one hand a certain amount of Cr elements are provided for steel alloy, the content of Cr elements is reached specified amount, and Cr elements can be improved and rolled
The corrosion resistance and heat resistance of roller.
Further, the alloying element such as C, Mn, Cr, Mo, V in roll can play preferably collaboration on this basis and make
With, the mechanical performance of operation roll of mill is effectively improved, improves the wearability and millimeter amount of rolling of roll, and with good
Good hot-cracking resistance, the operating efficiency of milling train can be lifted.
The present invention is produced by the way of composite centrifugal casting, while top layer hard high-wearing feature is ensured, is ensured
The toughness of core of the roll, improve the surface quality and service life of roll.The body of roll working lining and roller of roll in the present invention
Core uses different materials and different smelting processes, then by the method for centrifugal casting that body of roll working lining and roller core is compound
To roll top layer high rigidity, the demand of high-wearing feature together, had both been met, the toughness of roller core in turn ensure that.
When roll working lining is cast in the present invention, the rotating speed of centrifuge is controlled at 700~900 revs/min, can make the body of roll
Working lining has higher consistency in casting cycle, after the completion of the molten steel casting of body of roll working lining, by turning for centrifuge
Speed is adjusted to 450~550 revs/min, can be smoothed out molten steel contraction process, effectively reduce gravity segregation.In the present invention
Temperature retention time of the roll in sandbox is 120 hours~150 hours, ensure that the uniform cooling of casting, avoids cracking.This hair
The tempering time of bright middle roll is 150~280 hours, provides the time of abundance for the precipitation of carbide, carbide is in the body of roll
Working lining plays a part of dispersion-strengtherning, further increases the hardness and wearability of body of roll working lining, improves roll campaign.
Embodiment
The present invention is described in further details with reference to embodiment：
Embodiment one：
A kind of hot continuous rolling finishing roll, include the body of roll work of roller core and the high-alloy steel casting cast by spheroidal graphite cast-iron
Layer, the design proportioning of the chemical composition of the body of roll are：C：2.2~2.4%, Si：0.30~0.40%, Mn：0.60~0.80%, Cr：
13.00~15.00%, Ni：0.20~0.40%, Mo：0.50~0.60%, V：0.70~0.80%, N:0.1~0.2%, S≤
0.05%, P≤0.1%, remaining is Fe and inevitable impurity；Said ratio is matched according to quality.Due to the present embodiment
In the main source using CrN as Cr elements, N element can be excessive in molten steel and the element such as Si, Al, V carries out chemical combination
N can molten steel cool down during separate out, therefore in the present embodiment N element final content should depending on testing result,
Its approximate range should be controlled within 1000ppm to 2000ppm, that is, account for the quality control of molten steel 0.1~0.2% with
It is interior.
In smelting process, body of roll working lining is equipped with alloy including CrN as raw material using high-quality steel scrap, will except containing
The material for having V smelted after accurately matching in induction furnace, and smelting temperature is 1500 DEG C~1600 DEG C；With accounting for before coming out of the stove
The Al that steel quality percentage is 0.5%~1% carries out deoxidation to molten steel as deoxidier, and reaction temperature is 1500 DEG C~1560
℃；Roller core material is spheroidal graphite cast-iron, is smelted using the pig iron as raw material in blast furnace, and smelting temperature is 1460 DEG C~1500 DEG C, is come out of the stove
It is preceding that inovulant and nodulizer are added in molten iron；Inovulant is ferrosilicon, and the percentage for accounting for quality of molten steel is 0.4%~0.8%, nodularization
Agent is magnesium-rare earth, and the percentage for accounting for quality of molten steel is 1%~1.3%.Should be noted that in the smelting stage V will deoxidation of molten steel it
After add in firm water.
During casting, body of roll working lining of casting first, the cast temperature of molten steel is 1350 DEG C~1400 DEG C, centrifuge during casting
Speed setting is 700 revs/min, and after the completion of body of roll working lining pouring molten steel, centrifuge speed is adjusted into 450 revs/min,
Until the exospheric temperature of body of roll working lining is cooled to 1350 DEG C~1400 DEG C.Then by the sandbox and use of body of roll working lining of having cast
Merged in the sandbox of casting roller core, the molten iron handled well is cast in the sandbox after merging, cast temperature is 1450 DEG C
~1500 DEG C；After slow cooling 120 hours, open sandbox in sandbox wait the roll cast and take out roll, cleaning roller surface is attached
The molding sand.
In heat treatment stages, casting is subjected to stress relief annealing, 400 DEG C~600 DEG C of annealing temperature, soaking time 120 is small
When, insulation terminates rear furnace cooling；Then the roll completed to annealing is machined out, and obtains expected size and precision；Most
Surface heat-treatent is carried out to roll using differential quenching method afterwards, 800 DEG C~1100 DEG C of hardening heat, Quenching Soaking Time 2 is small
When, cooled down using spraying or quenching mode；Then it is tempered, 450 DEG C~550 DEG C of temperature, during tempering
Between amount to 150 hours.
Stokehold samples carries out quality analysis to the chemical composition of molten steel, and its result is：C：2.3%, Si：0.33%, Mn：
0.71%, Cr：13.30%, Ni：0.28%, Mo：0.53%, V：0.72%, N:0.12%, S：0.02%, P:0.04%, remaining be Fe and
Inevitable impurity.
After testing, roll barrel metallographic structure grain size substantially refines, V in matrix（C）N Particle distributions are obvious, roll
The more conventional production high chrome material of wearability under hot operation state improves 17%, actually uses the wear extent on milling train
Reduce by 16.8%.
Embodiment two：
The difference of embodiment two and embodiment one is：The quality proportioning of the smelting stage each element of body of roll working lining
For：C：2.2~2.4%, Si：0.80~1.00%, Mn：1.30~1.50%, Cr：16.00~18.00%, Ni：0.80~1.00%,
Mo：0.70~0.80%, V：1.1~1.3%, N:0.1~0.2%, S≤0.05%, P≤0.1%, remaining is for Fe and inevitably
Impurity.Remaining smelts the technological design all same in stage.
It is also different with embodiment one in the centrifuge speed and temperature retention time of cast sections, body of roll working lining of casting
When centrifuge speed be set as 900 revs/min, after the completion of body of roll working lining pouring molten steel, centrifuge speed is adjusted to 550
Rev/min, until the exospheric temperature of body of roll working lining is cooled to 1350 DEG C~1400 DEG C.Then by body of roll working lining of having cast
Sandbox is cast in the sandbox after merging with being merged for the sandbox for roller core of casting, by the molten iron handled well, cast temperature
For 1450 DEG C~1500 DEG C；After slow cooling 150 hours, open sandbox in sandbox wait the roll cast and take out roll, cleaning is rolled
The molding sand of roller surface attachment.
The soaking time of heat treatment stages is also different with embodiment one.In heat treatment stages, casting is carried out should
Power is annealed, 400 DEG C~600 DEG C of annealing temperature, soaking time 200 hours, and insulation terminates rear furnace cooling；Then annealing is completed
Roll be machined out, obtain expected size and precision；Finally roll is carried out at surface heat using differential quenching method
Reason, 800 DEG C~1100 DEG C of hardening heat, Quenching Soaking Time 8 hours, cooled down using spraying or quenching mode；
Then it is tempered, 450 DEG C~550 DEG C of temperature, tempering time amounts to 280 hours.
Stokehold samples carries out quality analysis to the chemical composition of molten steel, and its result is：C：2.28%, Si：0.45%, Mn：
0.99%, Cr：16.90%, Ni：0.50%, Mo：0.78%, V：1.05%, N:0.13%, S:0.04%, P:0.05%, remaining be Fe and
Inevitable impurity.
After testing, roll barrel metallographic structure grain size substantially refines, V in matrix（C）N Particle distributions are with respect to embodiment
One is more obvious, and the more conventional production high chrome material of wearability of the roll under hot operation state improves 19.5%, actual use
Wear extent on milling train reduces by 19.49%.
Claims (3)
1. a kind of hot continuous rolling finishing roll, include the body of roll work of roller core and the high-alloy steel casting cast by spheroidal graphite cast-iron
Layer, it is characterised in that：The chemical composition of the body of roll working lining and the percentage of each composition quality are：C：2.2~2.4%,
Si：0.30~0.40%, Mn：1.20~1.50%, Cr：13.00~18.00%, Ni：0.20~1.00%, Mo：0.50~0.80%,
V：1.10~1.30%, N:0.1~0.2%, S≤0.05%, P≤0.1%, remaining is Fe and inevitable impurity；
The manufacture method of hot continuous rolling finishing roll comprises the following steps：
a）Smelt：Body of roll working lining is equipped with appropriate alloy as raw material using high-quality steel scrap, and various materials are carried out after accurately matching
Smelted in induction furnace, smelting temperature is 1500 DEG C~1600 DEG C；Deoxidation is carried out to molten steel with deoxidier before coming out of the stove, reacted
Temperature is 1500 DEG C~1560 DEG C；
Roller core material is spheroidal graphite cast-iron, is smelted using the pig iron as raw material in blast furnace, and smelting temperature is 1460 DEG C~1500 DEG C, is come out of the stove
It is preceding that inovulant and nodulizer are added in molten iron；
b）Centrifugal casting：Cast first body of roll working lining, the cast temperature of molten steel is 1350 DEG C~1400 DEG C, centrifuge during casting
Rotating speed is 700~900 revs/min, and after the completion of body of roll working lining pouring molten steel, centrifuge speed is adjusted into 450~550
Rev/min, until the exospheric temperature of body of roll working lining is cooled to 1350 DEG C~1400 DEG C；
c）Mould assembling casting roller core：By the sandbox for body of roll working lining of having cast with being merged for the sandbox for roller core of casting；Will place
The molten iron managed is cast in the sandbox after merging, and cast temperature is 1450 DEG C~1500 DEG C；
d）Shake out sand removal：After slow cooling 120 hours~150 hours, open sandbox in sandbox wait the roll cast and take out roll,
Clear up the molding sand of roller surface attachment；
e）Conditioning treatment：Casting is subjected to stress relief annealing, 400 DEG C~600 DEG C of annealing temperature, soaking time 120 hours~
200 hours, insulation terminated rear furnace cooling；
f）Machining：Roll is machined out, obtains expected size and precision；
g）Surface hardening：Roller surface is heat-treated using differential quenching method, 800 DEG C~1100 DEG C of hardening heat, quenched
Fiery soaking time 2 hours~8 hours, cooled down using spraying or quenching mode；Then it is tempered, temperature
450 DEG C~550 DEG C, tempering time amounts to 150 hours~280 hours；
The smelting material of the body of roll working lining includes CrN；
The smelting material of the body of roll working lining includes V, and the V is added after deoxidier adds and smelting is carried out in smelting furnace
Refining.
A kind of 2. hot continuous rolling finishing roll according to claim 1, it is characterised in that：The deoxidier is Al, described de-
The mass percent that oxygen agent accounts for molten steel is 0.5%~1%, and reaction temperature is 1500 DEG C~1560 DEG C during deoxidation.
3. according to a kind of hot continuous rolling finishing roll described in any one of claim 1 or 2, it is characterised in that：The inovulant
For ferrosilicon, the percentage that the inovulant accounts for quality of molten steel is 0.4%~0.8%, and the nodulizer is magnesium-rare earth, the ball
The percentage that agent accounts for quality of molten steel is 1%~1.3%.
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| CN201610729512.0A CN106244908B (en) | 2016-08-26 | 2016-08-26 | A kind of hot continuous rolling finishing roll and its manufacture method |
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| CN201610729512.0A CN106244908B (en) | 2016-08-26 | 2016-08-26 | A kind of hot continuous rolling finishing roll and its manufacture method |
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| CN106244908B true CN106244908B (en) | 2018-03-23 |
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| CN106917035B (en) * | 2017-01-20 | 2019-09-24 | 中钢集团邢台机械轧辊有限公司 | A kind of high ferrochrome collars of wear-resisting type and its manufacturing method |
| CN107866306B (en) * | 2017-11-14 | 2019-06-18 | 成都利君实业股份有限公司 | A kind of stud formula Roller of High and its production method |
| CN108085583A (en) * | 2017-12-19 | 2018-05-29 | 西南科技大学 | A kind of wear member, content and high manganses and chromium content white cast-iron and preparation method thereof |
| CN108018482B (en) * | 2017-12-19 | 2020-12-29 | 中钢集团邢台机械轧辊有限公司 | High-chromium iron roller |
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|---|---|---|---|---|
| US5536230A (en) * | 1987-12-23 | 1996-07-16 | Chavanne-Ketin | Composite working roll for hot rolling flat products |
| CN1861829A (en) * | 2005-05-11 | 2006-11-15 | 江苏共昌轧辊有限公司 | Improved composite high chromium steel roller and preparation process thereof |
| CN101705430A (en) * | 2009-11-13 | 2010-05-12 | 江苏大学 | High-speed steel roll and preparation method thereof by centrifugal compounding in electromagnetic field |
| CN103526126A (en) * | 2013-09-02 | 2014-01-22 | 中钢集团邢台机械轧辊有限公司 | Tool steel roller for rolling medium-thickness plate and manufacturing method thereof |
| CN105562647A (en) * | 2015-11-12 | 2016-05-11 | 丹阳恒庆复合材料科技有限公司 | Forged steel roll journal indefinite chill high nickel-chromium-molybdenum composite roll process and equipment |
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- 2016-08-26 CN CN201610729512.0A patent/CN106244908B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5536230A (en) * | 1987-12-23 | 1996-07-16 | Chavanne-Ketin | Composite working roll for hot rolling flat products |
| CN1861829A (en) * | 2005-05-11 | 2006-11-15 | 江苏共昌轧辊有限公司 | Improved composite high chromium steel roller and preparation process thereof |
| CN101705430A (en) * | 2009-11-13 | 2010-05-12 | 江苏大学 | High-speed steel roll and preparation method thereof by centrifugal compounding in electromagnetic field |
| CN103526126A (en) * | 2013-09-02 | 2014-01-22 | 中钢集团邢台机械轧辊有限公司 | Tool steel roller for rolling medium-thickness plate and manufacturing method thereof |
| CN105562647A (en) * | 2015-11-12 | 2016-05-11 | 丹阳恒庆复合材料科技有限公司 | Forged steel roll journal indefinite chill high nickel-chromium-molybdenum composite roll process and equipment |
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| CN106244908A (en) | 2016-12-21 |
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