CN105463330B - Cold rolling aluminium working roll and its manufacturing method with good grindability - Google Patents
Cold rolling aluminium working roll and its manufacturing method with good grindability Download PDFInfo
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- CN105463330B CN105463330B CN201510882255.XA CN201510882255A CN105463330B CN 105463330 B CN105463330 B CN 105463330B CN 201510882255 A CN201510882255 A CN 201510882255A CN 105463330 B CN105463330 B CN 105463330B
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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
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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
- 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
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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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
- C21D2261/00—Machining or cutting being involved
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Abstract
The present invention relates to a kind of cold rolling aluminium working rolls with good grindability, and the chemical constituent and weight percentage of working roll material are C 0.85 ~ 0.95%, Si 0.25 ~ 0.45%, Mn 0.25 ~ 0.35%, Cr 2.50 ~ 3.50%, Mo 0.20 ~ 0.40%, Ni≤0.25%, P≤0.025%；S ≤0.025%；Remaining is Fe and inevitable impurity；Present invention obtains the cold rolling aluminium working roll with good grindability, while meet the requirement of the case hardness and roll surface roughness of working roll, it is good using verification the verifying results through user.
Description
Technical field
The present invention relates to roll manufacturing technology field, especially a kind of cold rolling aluminium working roll with good grindability and its
Manufacturing method.
Background technology
At present, the aluminium of advanced cold rolling aluminum recycling and aluminum alloy thin strip product are directly used in some as finished product or semi-finished product
In the product manufacturing of field, at the same time people are also higher and higher to the appearance requirement of cold rolling aluminium and alloy product.Tradition
The 9Cr3Mo material cold rolling aluminium working rolls of technique manufacture are under defined grinding process, it is sometimes desirable to which grinding, which can be only achieved, repeatedly wants
The roll surface surface quality and roughness value asked.Often reach roll surface surface quality requirements, but roughness value is relatively low, and upper machine makes
Be not achieved after the rolling cycle will occur skid or product do not meet surface quality requirements；When adjustment grinding parameter reaches requirement
Roughness when, the defects of roll surface is present with spiral lamination, dark line, scratches, it is impossible to upper machine.According to incompletely statistics, this situation is more
Number cold rolling aluminium manufacturer occurs, and accounts for certain ratio, to labor intensity, production efficiency, grinding cost and organization of production etc.
Cause influence.
The content of the invention
The technical problem to be solved in the invention is to provide a kind of cold rolling aluminium working roll and its system with good grindability
Method is made, suitable for the extremely stringent cold rolling aluminum sheet belt operation roll of mill of roller surface quality and roughness requirements, improving
The grinding performance of cold rolling aluminium working roll.
In order to solve the above technical problems, the technical solution adopted in the present invention is：Cold rolling aluminium work with good grindability
Make roller, the chemical constituent and weight percentage of the working roll material be,
C 0.85~0.95%, Si 0.25~0.45%, Mn 0.25~0.35%, Cr 2.50~3.50%, Mo
0.20~0.40%, Ni≤0.25%, P≤0.025%；S≤0.025%；Remaining is Fe and inevitable impurity.
Technical solution of the present invention further improvement lies in that：The chemical constituent and weight percentage of the working roll material
For,
C 0.88~0.93%, Si 0.30~0.35%, Mn 0.30~0.35%, Cr 3.00~3.20%, Mo
0.30~0.40%, Ni≤0.25%, P≤0.015%；S≤0.010%；Remaining is Fe and inevitable impurity.
Technical scheme further includes：The manufacturing method of cold rolling aluminium working roll with good grindability, the system
Making method includes following process steps：
1) steel raw material is prepared according to the chemical constituent in working roll material and weight percentage, according to certain roller stock
Roller stock is made in production technology；
2) rough turn and conditioning treatment is carried out to roller stock；
3) impewdance matching heat treatment is carried out to roller stock；
4) it is ground according to the grinding process parameters of regulation.
Technical solution of the present invention further improvement lies in that：The detailed process of roller stock production technology is in the step 1),
Steel raw material with electric arc furnaces and refining furnace is smelted, is molded into electrode ingot, first electrode ingot is made annealing treatment after the demoulding,
Snagging is carried out to electrode ingot again, electroslag remelting is then carried out, to the chemical constituent and weight percentage of the electrode ingot after remelting
It is chemically examined, forging stock is forged into after chemical examination is qualified, heat treatment after forging is carried out to forging stock, finally carried out turnery processing and obtain roller stock.
Technical solution of the present invention further improvement lies in that：The detailed process of conditioning treatment is in the step 2), will
Roller stock after rough turn is heated to 930~980 DEG C, 10~15h of soaking time；Roller stock after heat preservation is air-cooled to less than 300 DEG C, then
Roller stock is heated to 620~650 DEG C of progress high temperings, the high tempering time is 20~30h.
Technical solution of the present invention further improvement lies in that：The detailed process that impewdance matching is heat-treated in the step 3)
For, the roller stock after conditioning treatment is transferred in induction hardening equipment, is heated to 900~920 DEG C, the roller stock after heating into
Enter and deep cooling is carried out in -90~-150 DEG C of liquid nitrogen tank, the deep cooling time is 4~6h, and the roller stock after deep cooling is risen again in air to room
Temperature, then roller stock is heated to 80~180 DEG C of progress lonneals, the lonneal time is 80~150h.
Technical solution of the present invention further improvement lies in that：The width of grinding process medium plain emery wheel in the step 4) is
100mm, a diameter of 900mm, granularity are 120 mesh.
Technical solution of the present invention further improvement lies in that：Grinding process parameters in the step 4) are specifically, transverse direction
The amount of feeding is 0~0.014mm/min, and length feed amount is 530~3100mm/min, and the rotating speed of emery wheel is 425~594rps, cold
The rotating speed of roll is 38rpm.
Technical solution of the present invention further improvement lies in that：The case hardness of the working roll is 90~100HSD.
Technical solution of the present invention further improvement lies in that：The working roll is in roll surface roughness after grinding
Ra0.500~0.650 μm.
By adopting the above-described technical solution, the technological progress that the present invention obtains is：
The present invention passes through the grinding to cold rolling aluminium working roll material and the cold rolling aluminium working roll that improved of manufacturing method
Performance obtains the cold rolling aluminium working roll with good grindability, while meets the case hardness of working roll and roll surface roughness
Requirement, through user using verification the verifying results it is good.It, can be instead of import roll in sheet band cold rolling aluminum recycling.
The present invention has done larger improvement in the chemical constituent and weight percentage in material, with traditional 9Cr3Mo materials
Cold rolling aluminium working roll compare, the present invention carries out rational proportion to the C in cold roll material and other alloying elements, to Si members
The content of element is controlled in 0.25~0.45%, preferably 0.30~0.35%, solution strengthening matrix.The content control of Mn elements is carried
Up to 0.25~0.35%, preferably 0.30~0.35% promote carbides in austenite during heating to dissolve quantity, improve quenching degree
And matrix strength.The content control of Mo elements is improved to 0.20~0.40%, preferably 0.30-0.40%, increases high rigidity, height
Wearability carbide quantity, temperature improves during same rigidity, enhances structure stability.
Present invention obtains the cold rolling aluminium working rolls with good grindability, and roll is made more preferably to send out and adapts to sheet band cold rolling aluminium
The rolling requirements of milling train solve the problems, such as that grinding efficiency is low, while reduce the consumption of roll dressing amount.
The present invention carries out the manufacturing technology steps of cold roll larger improvement, and roller stock production technology can ensure to reduce steel
Middle gas and non-metallic inclusion content improve Molten Steel Cleanliness, obtain uniform small grains, the roller stock of good mechanical performance.
By carrying out conditioning treatment to roller stock so that roller stock structural transformation is globular pearlite, and grain size is moderate, even tissue, carbon
Compound is in granular form precipitation.By carrying out impewdance matching processing to roller stock so that body of roll even tissue, hardness, wearability improve,
Paralympic reduction after cold treatment, is detected metallographic structure after tempering, and species, size, the quantity of carbide particle are obviously improved.
Define roller stock grinding process parameters so that roll had both obtained good roll surface quality under rational grinding process, reduced mill
Defect is cut, and required roughness can be obtained.
Description of the drawings
Fig. 1 is the body of roll metallographic structure micrograph of the present invention；
Fig. 2 is traditional body of roll metallographic structure micrograph.
Specific embodiment
The invention discloses the cold rolling aluminium working roll with good grindability, the chemical constituent of working roll material and weight hundred
Point content is,
C 0.85~0.95%, Si 0.25~0.45%, Mn 0.25~0.35%, Cr 2.50~3.50%, Mo
0.20~0.40%, Ni≤0.25%, P≤0.025%；S≤0.025%；Remaining is Fe and inevitable impurity.
The chemical constituent and weight percentage of working roll material, further preferably,
C 0.88~0.93%, Si 0.30~0.35%, Mn 0.30~0.35%, Cr 3.00~3.20%, Mo
0.30~0.40%, Ni≤25%, P≤0.015%；S≤0.010%；Remaining is Fe and inevitable impurity.
The invention also discloses the manufacturing method of the cold rolling aluminium working roll with good grindability, manufacturing method includes following
Processing step：
1) steel raw material is prepared according to the chemical constituent in working roll material and weight percentage, according to certain roller stock
Roller stock is made in production technology.
The detailed process of roller stock production technology is in step 1), steel raw material is smelted with electric arc furnaces and refining furnace,
Electrode ingot is molded into, first electrode ingot is made annealing treatment after the demoulding, then snagging is carried out to electrode ingot, then carries out electroslag weight
It is molten, the chemical constituent and weight percentage of the electrode ingot after remelting are chemically examined, forging stock is forged into after chemical examination is qualified, to forging
Base carries out heat treatment after forging, finally carries out turnery processing and obtains roller stock.
2) rough turn and conditioning treatment is carried out to roller stock.
The detailed process of conditioning treatment is in step 2), will be rough turn after roller stock be heated to 930~980 DEG C, during heat preservation
Between 10~15h；Roller stock after heat preservation is air-cooled to less than 300 DEG C, then roller stock is heated to 620~650 DEG C of progress high temperings,
The high tempering time is 20~30h.
3) impewdance matching heat treatment is carried out to roller stock.
The detailed process that impewdance matching is heat-treated in step 3) is that the roller stock after conditioning treatment is transferred to impewdance matching
In device, 900~920 DEG C are heated to, carries out deep cooling in the liquid nitrogen tank of -90~-150 DEG C of roller stock entrance after heating, during deep cooling
Between for 4~6h, the roller stock after deep cooling returns in air to be warmed to room temperature, then roller stock is heated to 80~180 DEG C of progress lonneals,
The lonneal time is 80~150h.
4) it is ground according to the grinding process parameters of regulation.
The width of grinding process medium plain emery wheel in step 4) is 100mm, and a diameter of 900mm, granularity is 120 mesh.
Specifically, lateral feed is 0~0.014mm/min, length feed amount is grinding process parameters in step 4)
530~3100mm/min, the rotating speed of emery wheel is 425~594rps, and the rotating speed of cold roll is 38rpm.
Cold rolling aluminium working roll disclosed by the invention with good grindability, tests the case hardness of working roll,
Test method is：Using the mechanical sclerometer Site Detection of D types, test result numerical value unit HSD.The surface of working roll is hard
It spends for 90~100HSD.Working roll is tested in roll surface roughness after grinding, test method is：Using surface roughness
Detector Site Detection, test result represent that numerical value unit μm, Ra meanings are the arithmetic average deviation of surface profile using Ra,
Numerical value refers to the arithmetic mean of instantaneous value of the ordinate value absolute value in a sample length.Working roll is in roll surface roughness after grinding
Ra0.500~0.650 μm.
The present invention is described in further details with reference to embodiment：
Embodiment 1
The manufacturing method of the cold rolling aluminium working roll with good grindability of the present embodiment, including following process steps：
1) steel raw material is prepared according to the chemical constituent in working roll material and weight percentage, according to certain production
Roller stock is made in technique.
Specifically, steel raw material with electric arc furnaces and refining furnace is smelted, is molded into electrode ingot, first to electrode after the demoulding
Ingot is made annealing treatment, then carries out snagging to electrode ingot, electroslag remelting is then carried out, to the chemical constituent of the electrode ingot after remelting
And weight percentage is chemically examined, and forging stock is forged into after chemical examination is qualified, is carried out heat treatment after forging to forging stock, is finally carried out turning
Processing obtains roller stock.
The weight percentage test result of Main chemical component in the cold rolling aluminium working roll material of the present embodiment referring to
Shown in embodiment 1 arranges in table 1, remaining is Fe and inevitable impurity.
2) rough turn and conditioning treatment is carried out to roller stock.
Specifically, the roller stock after will be rough turn is heated to 930 DEG C, soaking time 15h；Roller stock after heat preservation is air-cooled to 300
Below DEG C, then roller stock is heated to 630 DEG C and carries out high temperings, the high tempering time is 30h.
3) impewdance matching heat treatment is carried out to roller stock.
Specifically, the roller stock after conditioning treatment is transferred in induction hardening equipment, 900 DEG C, after heating are heated to
The liquid nitrogen tank of -90 DEG C of roller stock entrance carries out deep cooling, and the deep cooling time is 5h, and the roller stock after deep cooling returns in air to be warmed to room temperature, then
Roller stock is heated to 150 DEG C of progress lonneals, the lonneal time is 120h.
4) it is ground according to certain grinding process parameters.
Specifically, the width for the emery wheel selected in grinding process is 100mm, a diameter of 900mm, granularity is 120 mesh.Grinding
Technological parameter specifically,
The roll surface hardness of cold rolling aluminium working roll made from the present embodiment is 95~96HSD, and cold rolling aluminium working roll is after grinding
The roll surface roughness of acquisition is Ra0.545~0.576 μm.
Fig. 1 is the body of roll metallographic structure micrograph of the present embodiment.
Embodiment 2
The cold rolling aluminium working roll with good grindability of the present embodiment, the weight hundred of the Main chemical component in material
After tested, shown in the content of Main chemical component is arranged referring to embodiment 2 in table 1, remaining is Fe and inevitably miscellaneous for point content
Matter.
The manufacturing method of the cold rolling aluminium working roll with good grindability of the present embodiment, processing step and embodiment 1
It is close, differed with embodiment 1 shown in other specific heat treatment parameter arranged referring to embodiment 2 in table 2, it is specific be ground processing parameter with
Embodiment 1 is identical.
The roll surface hardness of cold rolling aluminium working roll made from the present embodiment is 96~98HSD, what cold roll obtained after grinding
Roll surface roughness is Ra0.581~0.615 μm.
Embodiment 3
The cold rolling aluminium working roll with good grindability of the present embodiment, the weight hundred of the Main chemical component in material
After tested, shown in the content of Main chemical component is arranged referring to embodiment 3 in table 1, remaining is Fe and inevitably miscellaneous for point content
Matter.
The manufacturing method of the cold rolling aluminium working roll with good grindability of the present embodiment, processing step and embodiment 1
It is close, differed with embodiment 1 shown in other specific heat treatment parameter arranged referring to embodiment 3 in table 2, it is specific be ground processing parameter with
Embodiment 1 is identical.
The roll surface hardness of cold rolling aluminium working roll made from the present embodiment is 97~99HSD, what cold roll obtained after grinding
Roll surface roughness is Ra0.599~0.633 μm.
Embodiment 4
The cold rolling aluminium working roll with good grindability of the present embodiment, the weight hundred of the Main chemical component in material
After tested, shown in the content of Main chemical component is arranged referring to embodiment 4 in table 1, remaining is Fe and inevitably miscellaneous for point content
Matter.
The manufacturing method of the cold rolling aluminium working roll with good grindability of the present embodiment, processing step and embodiment 1
It is close, differed with embodiment 1 shown in other specific heat treatment parameter arranged referring to embodiment 4 in table 2, it is specific be ground processing parameter with
Embodiment 1 is identical.
The roll surface hardness of cold rolling aluminium working roll made from the present embodiment is 95~97HSD, what cold roll obtained after grinding
Roll surface roughness is Ra0.562~0.594 μm.
Comparative example 1 (D1)
The cold rolling aluminium working roll of this comparative example, the weight percentage of the various chemical constituents in material are after tested：
C：0.93%, Si：0.30%, Mn：0.25%, Cr：3.02%, Mo：0.23%, Ni：0.04%, P：0.011%,
S：0.005%, remaining is Fe and inevitable impurity.
The production of this comparative example roll includes following process steps：
1) steel raw material is prepared according to the chemical constituent in working roll material and weight percentage, according to certain production
Roller stock is made in technique.
Specifically, steel raw material with electric arc furnaces and refining furnace is smelted, is molded into electrode ingot, first to electrode after the demoulding
Ingot is made annealing treatment, then carries out snagging to electrode ingot, electroslag remelting is then carried out, to the chemical constituent of the electrode ingot after remelting
And weight percentage is chemically examined, and forging stock is forged into after chemical examination is qualified, is carried out heat treatment after forging to forging stock, is finally carried out turning
Processing obtains roller stock.
2) rough turn and conditioning treatment is carried out to roller stock.
Specifically, the roller stock after will be rough turn is heated to 895 DEG C, soaking time 15h；By the body of roll water-spraying control after heat preservation
30min, roll neck 5min, then roller stock is heated to 630 DEG C of progress high temperings, the high tempering time is for 24 hours.
3) impewdance matching heat treatment is carried out to roller stock.
Specifically, the roller stock after conditioning treatment is transferred in induction hardening equipment, 915 DEG C, after heating are heated to
The liquid nitrogen tank of -60 DEG C of roller stock entrance carries out deep cooling, and the deep cooling time is 4h, and the roller stock after deep cooling returns in air to be warmed to room temperature, then
Roller stock is heated to 130 DEG C of progress lonneals, the lonneal time is 100h.
4) it is ground according to certain grinding process parameters.
Specifically, the width for the emery wheel selected in grinding process is 100mm, a diameter of 900mm, granularity is 120 mesh.Grinding
Technological parameter is specifically, lateral feed is 0~0.014mm/min, and length feed amount is 530~3100mm/min, emery wheel
Rotating speed is 425-594rps, and the rotating speed of cold roll is 38rpm.
The roll surface hardness of cold rolling aluminium working roll made from this comparative example is 95~96HSD, what cold roll obtained after grinding
Roll surface roughness is Ra0.411~0.448 μm.
Fig. 2 is the body of roll metallographic structure micrograph of the present embodiment.
The 1 Examples 1 to 4 cold rolling aluminium working roll Contents of Main Components table of comparisons of table
2 Examples 1 to 4 cold rolling aluminium work roll thermal treatment process parameter lookup table of table
3 Examples 1 to 4 of table, 1 cold rolling aluminium working roll performance parameter of comparative example
As can be seen from Table 3, the cold rolling aluminium working roll with good grindability of the invention, it is coarse to have suitable roll surface concurrently
Degree and good case hardness, user's using effect is good, improves production efficiency, reduces operating cost.
Claims (4)
1. the cold rolling aluminium working roll with good grindability, it is characterised in that：The chemical constituent and weight of the working roll material
Percentage composition is,
C 0.88 ~ 0.93%, Si 0.30 ~ 0.35%, Mn 0.30 ~ 0.35%, Cr 3.00 ~ 3.20%, Mo 0.30 ~ 0.40%, Ni
≤ 0.08%, P≤0.015%；S ≤0.010%；Remaining is Fe and inevitable impurity；
The manufacturing method of cold rolling aluminium working roll with good grindability includes following process steps：
1）Steel raw material is prepared according to the chemical constituent in working roll material and weight percentage, is produced according to certain roller stock
Roller stock is made in technique；
2）Rough turn and conditioning treatment is carried out to roller stock, the detailed process of conditioning treatment is, will be rough turn after roller stock be heated to
930 ~ 980 DEG C, 10 ~ 15h of soaking time；Roller stock after heat preservation is air-cooled to less than 300 DEG C, then roller stock is heated to 620 ~ 650
DEG C carry out high tempering, the high tempering time be 20 ~ 30h；
3）Impewdance matching heat treatment is carried out to roller stock；The detailed process of impewdance matching heat treatment is, by the roller after conditioning treatment
Base is transferred in induction hardening equipment, is heated to 900 ~ 920 DEG C, in the liquid nitrogen tank of -90 ~ -150 DEG C of roller stock entrance after heating into
Row deep cooling, deep cooling time are 4 ~ 6h, and the roller stock after deep cooling returns in air to be warmed to room temperature, then by roller stock be heated to 80 ~ 180 DEG C into
Row lonneal, lonneal time are 80 ~ 150h；
4）It is ground according to the grinding process parameters of regulation, the step 4）In the width of grinding process medium plain emery wheel be
100mm, a diameter of 900mm, granularity are 120 mesh, and grinding process parameters are indulged specifically, lateral feed is 0 ~ 0.014mm/min
It is 530 ~ 3100mm/min to the amount of feeding, the rotating speed of emery wheel is 425 ~ 594rps, and the rotating speed of cold roll is 38rpm.
2. the cold rolling aluminium working roll according to claim 1 with good grindability, it is characterised in that：The step 1）In
The detailed process of roller stock production technology is that steel raw material is smelted with electric arc furnaces and refining furnace, is molded into electrode ingot, the demoulding
First electrode ingot is made annealing treatment afterwards, then snagging is carried out to electrode ingot, electroslag remelting is then carried out, to the electrode ingot after remelting
Chemical constituent and weight percentage chemically examined, be forged into forging stock after chemical examination is qualified, heat treatment after forging carried out to forging stock, most
Turnery processing is carried out afterwards obtains roller stock.
3. the cold rolling aluminium working roll according to claim 1 with good grindability, it is characterised in that：The working roll
Case hardness is 90 ~ 100HSD.
4. the cold rolling aluminium working roll according to claim 1 with good grindability, it is characterised in that：The working roll exists
Roll surface roughness after grinding is Ra0.500 ~ 0.650 μm.
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| DE4143012C2 (en) * | 1991-12-24 | 1993-11-25 | Thyssen Edelstahlwerke Ag | Use of steel for cold rolling |
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Effective date of registration: 20190620 Address after: 054099 No. 836 Zhongxing West Street, Qiaoxi District, Xingtai City, Hebei Province Patentee after: Xingtai Roll Small Cold Roll Co., Ltd. Address before: 054025 No. 1 Xinxing West Street, Qiaoxi District, Xingtai City, Hebei Province Patentee before: Sinosteel Xingtai Machinery & Mill Roll Co., Ltd. |