CN103459619A - Method for winding hot-rolled maraging steel strip - Google Patents
Method for winding hot-rolled maraging steel strip Download PDFInfo
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- CN103459619A CN103459619A CN2012800140839A CN201280014083A CN103459619A CN 103459619 A CN103459619 A CN 103459619A CN 2012800140839 A CN2012800140839 A CN 2012800140839A CN 201280014083 A CN201280014083 A CN 201280014083A CN 103459619 A CN103459619 A CN 103459619A
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- maraging steel
- strip
- temperature
- steel strip
- roll coil
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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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/02—Winding-up or coiling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/26—Special arrangements with regard to simultaneous or subsequent treatment of the material
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
-
- 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
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
-
- 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
-
- 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
- C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
-
- 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
Abstract
A method for winding a hot-rolled maraging steel strip is provided with which it is possible to inhibit a hot-rolled coil from suffering a local increase in hardness. The method for winding a hot-rolled maraging steel strip comprises heating a raw material for maraging steel to 1,050-1,300 C, subsequently hot-rolling the raw material to obtain a maraging steel strip, and then winding the maraging steel strip into a coil, wherein the temperature of the maraging steel coil obtained by winding the maraging steel strip is kept at a temperature above the Ms point throughout the whole length of the maraging steel strip and, once the maraging steel coil has cooled to or below the Ms point, the maraging steel coil is prevented from heating up again to a temperature above the Ms point.
Description
Technical field
The present invention relates to a kind of method for winding of hot rolling Maraging steel strip.
Background technology
Because maraging steel has the very high tensile strength of 2000MPa left and right, therefore be applied to requiring high-intensity member.Wherein, for example, the maraging steel that the stepless speed changer of motor car engine is used with part etc. is steel band by hot rolling, then, and by the cold rolling thin plate that is processed as the 0.5mm left and right.
Hot-rolling method as above-mentioned maraging steel, for example, disclose a kind of manufacture method of martensitic aging cold-rolled steel sheet in Japanese kokai publication sho 60-234920 communique (patent documentation 1), the manufacture method of this martensitic aging cold-rolled steel sheet is made as steel below 60% and by steel and is made as below 20% at the accumulation draft below 950 ℃ at the accumulation draft below 1000 ℃, complete hot rolling at the temperature more than 900 ℃, at the temperature of 300 ℃～600 ℃, reeled, then after cold rolling, carry out recrystallization annealing and solution heat treatment, above-mentioned steel contains C≤0.02%, Si≤0.1%, Mn≤0.2%, P≤0.01%, S≤0.01%, N≤0.01% and contain Ni15%～25%, Co≤10.0%, Mo≤7.0%, Al≤0.2%, any two in Ti≤1.5% or more than three kinds, rest part consists of Fe and inevitable impurity.
xian You Ji Intraoperative document
patent documentation
Patent documentation 1: Japanese kokai publication sho 60-234920 communique
Summary of the invention
the problem that invention will solve
In above-mentioned patent documentation 1, disclosed hot-rolled condition is: complete hot rolling at the temperature more than 900 ℃, reeled at the temperature of 300 ℃～600 ℃, prevent the inhomogeneous phase transformation on runoff table, and make steel plate carry out martensitic transformation after coiling.
According to the inventor's research, confirmed: after coiling, even carry out temperature treatment in order to cause martensitic transformation, the Maraging steel strip that also can obtain at coiling (below, be called the roll coil of strip) the upper hardness inequality that local hardening occurs.So, for example, in the situation that wish requires the carrying material of part for stepless speed changer (CVT) use of the motor car engine of high plate thickness precision by cold rolling acquisition, become following large problem: therefore the energy of deformation while due to the hardness inequality, directly having influence on rolling poor can't meet the thickness of slab precision.
The method for winding of the hot rolling Maraging steel strip that the object of the present invention is to provide a kind of hardness that can suppress the part of the roll coil of strip after hot rolling to rise.
for the scheme of dealing with problems
The present invention completes in view of the above problems.
, the method for winding that the present invention is a kind of hot rolling Maraging steel strip, it is after the starting material by maraging steel are heated to 1050 ℃～1300 ℃, carry out hot rolling, after having obtained Maraging steel strip, reel this Maraging steel strip and form the roll coil of strip, wherein, the temperature that the Maraging steel strip of reeling above-mentioned Maraging steel strip and obtaining is rolled up remains on the temperature of ordering over Ms in the Maraging steel strip length range, then, after above-mentioned Maraging steel strip volume is cooled to the temperature below the Ms point, no longer backheat is to the temperature of ordering over Ms.
Preferably, form the method for winding of the hot rolling Maraging steel strip of the following roll coil of strip: the temperature that completes of above-mentioned hot rolling is made as to 700 ℃ and be less than 900 ℃, after having obtained Maraging steel strip, with interior the beginning, above-mentioned Maraging steel strip was wound as to the band web-like at 30 seconds from hot rolling completes, from the roll coil of strip after two minutes coiling completes, the temperature of the width central part of roll coil of strip periphery, the temperature of the temperature of the width central part of roll coil of strip inner peripheral surface and the side of roll coil of strip central part is all over the Ms point and below 700 ℃, and temperature head is in 300 ℃.
the effect of invention
According to the method for winding of hot rolling Maraging steel strip of the present invention, the hardness that can suppress the Maraging steel strip after hot rolling rises, and can save the operations such as cut-out that caused by sclerosis, also more excellent aspect economy, productivity.
The accompanying drawing explanation
Fig. 1 means the schematic diagram of the roll coil of strip that coiling obtains.
Embodiment
The inventor, by investigating the reason of the local hardening of Maraging steel strip after hot rolling, has obtained following opinion.
At first, local hardness rises and to be considered to by by cooling, that the tissue after the martensitic transformation causes, the distinctive ageing behavior of maraging steel (Japanese: エ ー ジ Application グ effect) has occurred caused, and, the part of the points hardness's rising caused by this ageing behavior is consistent with the part that temperature on the position temporarily cooling rises, and the reason that the temperature at temporary transient cooled position rises is the heat transfer from roll coil of strip inside.
That is to say, merely the hardness inequality can not occur in cooling position gradually, but causes significantly after martensitic transformation on the position that temperature rises and can produce local ageing behavior, causes causing the hardness inequality.
Explain the peculiar ageing behavior of this maraging steel.
People of the present invention from the representative as maraging steel, be the quality % martensitic aging steel raw material that is 18%Ni-9%Co-5%Mo-0.45%Ti-0.1%Al-bal.Fe, gathered for investigation by the temperature at the temporary transient cooled position test film that hardness that (backheat) cause rises that rises.The impact investigation of backheat is to reheat the above-mentioned test film after the martensitic transformation has temporarily occurred, and has investigated the relation of temperature and time.
The ageing behavior that appearance is caused by backheat is that the part of the Maraging steel strip in the roll coil of strip is below the Ms point, and has again caused the situation that temperature rises.Therefore, after test film is kept to one hour with 850 ℃, carry out solution treatment under the condition of water-cooled and air cooling.Water-cooled is envisioned for the situation of carrying out spraying cooling on runoff table.Air cooling is envisioned for the situation of directly making the roll coil of strip after hot rolling.Arbitrary test film all presents martensitic stucture, and Vickers' hardness is 310HV.
By the test film by above-mentioned 200 ℃, 300 ℃, 400 ℃ and 500 ℃ carry out at each temperature reheating of 5 minutes, 10 minutes, 30 minutes and 60 minutes, measure the rising of the hardness caused by ageing behavior.Use Vickers hardness tester to carry out hardness measurement.Mean its result in table 1.In addition, the Ms point of the represented maraging steel of table 1 is 220 ℃.
table 1
As shown in table 1, the test film after being reheated with 200 ℃ below the Ms point is not found the rising of hardness.But, reheating of carrying out with 300 ℃, keeping hardness under the condition of 5 minutes to start a little to rise, this ascendant trend is higher and become more obvious along with reheating temperature, when reheating temperature, is to become the hardness over 350HV more than 400 ℃ the time.In addition, although the test film after water-cooled is a little different from the test film hardness after air cooling, meaned roughly the same trend.
Thus, if once be cooled to below Ms, and make metal structure become martensite, after when backheat reheats again, revealing effective period effect at short notice, and this effect is along with reheating that temperature is higher or the time is longer and become more obvious.
Therefore, in the hot-rolled process of maraging steel, for revealing effective period effect not, after the temperature be cooled to below the Ms point, must not can form and surpass again the temperature that Ms is ordered.If manifested ageing behavior, hardness can rise as shown in Table 1 above, and the position of rising in this hardness produces local ageing behavior, causes the hardness inequality, and is directly connected to the deteriorated of rolling accuracy in rear operation.That is to say, manifesting of the ageing behavior of maraging steel is to temperature sensitive.
By above-mentioned opinion, in the present invention, in order to eliminate the hardness inequality, applied following method.Below describe the structure of stipulating in the present invention in detail.
In the present invention, after the starting material by maraging steel are heated to 1050 ℃～1300 ℃, carry out hot rolling, after having obtained Maraging steel strip, reel this Maraging steel strip and form the roll coil of strip, the temperature that the Maraging steel strip of reeling above-mentioned Maraging steel strip and obtaining is rolled up remains on the temperature of ordering over Ms in the Maraging steel strip length range, and after above-mentioned Maraging steel strip volume is cooled to the temperature below the Ms point, no longer backheat is to the temperature of ordering over Ms.
In the present invention, the temperature of the Maraging steel strip volume obtained reeling remains on the temperature over Ms in the Maraging steel strip length range, is to manifest the ageing behavior caused by martensitic transformation-backheat on the Maraging steel strip in order to prevent from reeling in the roll coil of strip.Preferably, remain the temperature more than 30 ℃ in Ms point temperature, more preferably, remain the temperature more than 70 ℃ in Ms point temperature.
In addition, when the temperature of the heating in hot rolling is less than 1050 ℃, the raw-material hot workability of maraging steel reduces.Therefore, hot rolling is made as to 1050 ℃ with the lower limit of raw-material Heating temperature.On the other hand, when Heating temperature surpasses 1300 ℃, the danger that exists the raw-material ductility of maraging steel to reduce on the contrary.Therefore, hot rolling is made as to 1300 ℃ by the upper limit of raw-material Heating temperature.
In addition, importantly, after above-mentioned Maraging steel strip volume is cooled to the temperature below the Ms point, no longer backheat is to the temperature of ordering over Ms.As mentioned above, even the maraging steel after martensitic transformation also there will be the material of ageing behavior to the temperature several minutes of ordering over Ms for backheat.Once the revealing effective period effect, can cause the hardness at the position of this revealing effective period effect rise and cause the hardness inequality.So, after hot rolling, carry out when cold rolling, become and be difficult to control cold rolling thickness because hardness is uneven.Therefore, in the present invention, after the Maraging steel strip volume is cooled to the temperature below the Ms point, no longer make its backheat to the temperature of ordering over Ms.
By applying the manufacture method of appointment in above-mentioned the present invention, the difference of hardness of the Maraging steel strip in the roll coil of strip can be made as in Vickers' hardness 20HV.
Then, the preferred structure of stipulating in the present invention is described.
In the present invention, after the starting material by maraging steel are heated to 1050 ℃～1300 ℃, carry out hot rolling, hot rolling is completed to temperature and be made as more than 700 ℃ and be less than 900 ℃.This is because wish completes temperature by the reduce hot rolling, reduces the basic heat that ageing behavior produces.In addition, when with temperature, lower than the temperature that completes 900 ℃ of temperature that surpasses hot rolling, completing hot rolling, its result can reduce the temperature head between week, periphery, central part in the roll coil of strip.
At this, hot rolling is completed to temperature and be made as more than 700 ℃, be because processibility is lower and the bad ratio such as crackle occurs uprise when being less than this temperature.On the other hand, hot rolling is completed to temperature and be made as and be less than 900 ℃, this is because when being more than 900 ℃ the time, potentiality heat is larger, and easily causes occurring the ageing behavior of the part of the roll coil of strip.For example, roll coil of strip internal surface, roll coil of strip outside surface because of be exposed in extraneous air easily become cooling fast and the position below Ms point.On the other hand, near potentiality heat roll coil of strip central authorities is larger.Therefore, even in the situation that easily cooling roll coil of strip internal surface, roll coil of strip outside surface become below Ms point, also have the situation of the temperature backheat of the internal surface that makes the roll coil of strip because near potentiality roll coil of strip central authorities is warm, outside surface.Therefore, preferably reduce the potentiality heat of the roll coil of strip, hot rolling is completed to temperature and be defined as and be less than 900 ℃.
The thickness of the Maraging steel strip that utilizes hot rolling to obtain is more thin more can promote cooling under carrier state, makes Maraging steel strip cooling equably completing from hot rolling to play between the coiling roll coil of strip.Its result, by making the thickness attenuation of the roll coil of strip, near the potentiality heat drop roll coil of strip central authorities in the time of can making to form the roll coil of strip is low, for example, these are exposed to the backheat at the position of the part in extraneous air can to prevent more reliably roll coil of strip internal surface, roll coil of strip outside surface, can suppress the generation of ageing behavior.The thickness of the Maraging steel strip that therefore, will obtain by hot rolling is made as below 2.5mm better.In addition, if the thickness of the Maraging steel strip after hot rolling under to be limited to about 1.5mm better as cold rolling use.
In addition, in the present invention, preferably at 30 seconds from hot rolling completes, with interior the beginning, above-mentioned Maraging steel strip is wound as to the roll coil of strip.This be because, if be wound as rapidly the roll coil of strip from hot rolling completes, can carry out as roll coil of strip integral body cooling, therefore can prevent from becoming mutually martensitic position partly temperature rise.The better time till the beginning of reeling is in 25 seconds.In addition, in the present invention, so-called rolling completes the moment that the rearward end that refers to steel goes out from roll row, and so-called coiling starts to refer to the moment of the engaging-in wind2 of leading section of Maraging steel strip.
In addition, the time due to the coiling to being wound as the roll coil of strip till completing early can promote cooling to roll coil of strip integral body, and therefore, at 5 minutes, to complete coiling better with interior.Preferably in 4 minutes.
Except above-mentioned condition, in the present invention, preferably, from the roll coil of strip after two minutes coiling completes, the temperature of the temperature of roll coil of strip periphery width central part, the width central part of roll coil of strip inner peripheral surface, and the temperature of the side of roll coil of strip central part all over the Ms point and below 700 ℃, and temperature head is located in 300 ℃.
As mentioned above, the ageing behavior of the part caused owing to being risen by cooled temperature causes after martensitic transformation, therefore, if make the roll coil of strip cooling and carry out martensitic transformation gradually integratedly, can prevent by the rise generation of ageing behavior of the part that causes of cooled temperature.For this reason, need to after coiling completes, make at once the whole Ms point that surpasses of the roll coil of strip, as representing whole part, utilize above-mentioned three positions to stipulate this condition.
In addition, when the roll coil of strip surpasses 700 ℃, or temperature head is while surpassing 300 ℃, and it is large that the surface of the roll coil of strip in refrigerating work procedure and the temperature head between inside become, and may cause, on inside and the surface of the roll coil of strip, the hardness inequality occurs.
In addition, in order to be made as said temperature, except adjusting above-mentioned hot rolling, complete temperature, the adjustment coiling time opening, for example, utilize the method for not carrying out compulsory water-cooled on runoff table of usually carrying out also can realize.In addition, in the situation that may surpass 700 ℃, can also in the process of coiling Maraging steel strip, spray appropriate water and by spraying cooling, temperature is adjusted.
In addition, in above-mentioned the present invention, so-called roll coil of strip internal surface refers to, the inner surface of the roll coil of strip that the Maraging steel strip leading section 3 that Maraging steel strip will be in the roll coil of strip 1 shown in Fig. 1, after hot rolling is wound at first is positioned at is called roll coil of strip internal surface 5, and so-called roll coil of strip outside surface 4 refers to the outer surface of the roll coil of strip that Maraging steel strip rearward end 2 that the Maraging steel strip after hot rolling finally is wound is positioned at.In addition, so-called roll coil of strip central part 6 refers to that band twists on thickness direction the roughly zone of the thickness of half.
With regard to the measurement at three above-mentioned positions, for roll coil of strip internal surface and outside surface, be the width central part of measuring Maraging steel strip.This is because the backheat (temperature rising) caused by the potentiality thermal conductance of roll coil of strip central part is the fiercest near the width central part of Maraging steel strip.In addition, the temperature survey of roll coil of strip central part is carried out from the side of the roll coil of strip.
In addition, utilize infrared thermography to carry out the temperature survey at above-mentioned three positions comparatively easy.
In addition, one example of the composition of the maraging steel that can use in the present invention if mean, can use the material that comprises following element: with quality % contain below C:0.15%, Ni:8%～22%, Co:3%～20%, Mo:2%～9%, Ti:0%～2%, below Al:2.5%, Cr:0%～4%, oxygen: be less than 10ppm, nitrogen: be less than 15ppm, rest part is Fe and impurity.In addition, as selecting element, and then can also contain that Mg:0.01% is following, Ca:0.01% is following, B:0.01% is with lower any one or more element.
embodiment
Utilize following embodiment to illustrate in greater detail the present invention.
Utilize vacuum melting to manufacture consumable electrode, use above-mentioned consumable electrode to carry out vacuum arc and melt again, thereby obtain the martensitic aging bloom.The martensitic aging bloom obtained is carried out to forge hot and form the martensitic aging steel raw material that hot rolling that thickness is 60mm is used.
Mean the composition of martensitic aging bloom in table 2.In addition, the Ms point is 220 ℃.
table 2(mass%)
| C | Ni | Cr | Co | Mo | Ti | Al | (O) | (N) | (Ca) | (Mg) | (B) |
| 0.004 | 18.54 | 0.01 | 9.33 | 5.00 | 0.47 | 0.13 | 2 | 5 | 1 | 2 | 2 |
Annotate 1: the element beyond element described above is Fe and impurity.
Notes 2:() element shown in is ppm.
The martensitic aging steel raw material that the hot rolling that used thickness is 60mm is used carries out hot rolling.In addition, do not carry out the compulsory water-cooled on runoff table.In addition, implement spraying cooling in the process be wound as with web-like.
Utilize infrared thermography to measure the temperature of the roll coil of strip.The temperature of the Maraging steel strip volume that coiling obtains is 260 ℃～410 ℃, for surpass the temperature that Ms is ordered in the Maraging steel strip length range.In addition, after the Maraging steel strip volume is cooled to the temperature below the Ms point, no longer backheat is to the temperature of ordering over Ms.
Mean in table 3, table 4 that hot rolling completes the thickness of the Maraging steel strip after temperature, hot rolling, is wound as with the time till web-like, the reel temperature of the roll coil of strip just having completed and the temperature variation caused by the elapsed time to starting from hot rolling completes.In addition, in the temperature survey at three positions shown in table 3, " internal surface " and " outside surface " roll coil of strip internal surface 5 and roll coil of strip outside surface 4 of meaning for Fig. 1, and, near the measurement temperature central authorities for Maraging steel strip on width.The result of the roll coil of strip central part 6 of the roll coil of strip side that in addition, " central authorities " are survey sheet 1 expression.
The measurement of hardness is undertaken by following mode: untie the roll coil of strip after cooling completing, the Maraging steel strip that above-mentioned from being equivalent to " internal surface ", " outside surface " reach the position of " central authorities " gathers the hardness measurement test film.The oxide skin of test film for the hardness measurement that removal collects, further ground,
Measure its hardness from face side.
table 3
Table 4
As implied above, owing to hot rolling being completed in the scope that temperature setting stipulates in the present invention, therefore can reduce the temperature head in the roll coil of strip.
In addition,, there are not the shape defects such as distortion in the hardness inequality that the Maraging steel strip that the method for winding that utilizes the present invention to stipulate obtains does not exist the hardness that causes because of local ageing behavior to rise and produce yet.
In addition, the Maraging steel strip that the method for winding that utilizes the present invention to stipulate obtains can be made the hardness below 350HV in length range.Particularly, the fluctuation of hardness can, in 20HV, also can form hardness even in roll coil of strip length range.
utilizability on industry
Manufacture method of the present invention can be applied to exist the starting material of the problem of changes in hardness when the material of the transformation temperature to having metal structure carries out hot rolling, coiling.
description of reference numerals
1, the roll coil of strip; 2, Maraging steel strip rearward end; 3, Maraging steel strip leading section; 4, roll coil of strip outside surface; 5, roll coil of strip internal surface; 6, roll coil of strip central part.
Claims (2)
1. the method for winding of a hot rolling Maraging steel strip, it,, after the starting material by maraging steel are heated to 1050 ℃～1300 ℃, carries out hot rolling, after having obtained Maraging steel strip, reel this Maraging steel strip and form the roll coil of strip, it is characterized in that
The temperature that the Maraging steel strip of reeling above-mentioned Maraging steel strip and obtaining is rolled up remains on the temperature over Ms in the Maraging steel strip length range, then, after above-mentioned Maraging steel strip volume is cooled to the temperature below the Ms point, no longer backheat is to the temperature of ordering over Ms.
2. the method for winding of hot rolling Maraging steel strip according to claim 1, is characterized in that,
Form the following roll coil of strip: the temperature that completes of above-mentioned hot rolling is made as more than 700 ℃ and is less than 900 ℃, after having obtained Maraging steel strip, with interior the beginning, above-mentioned Maraging steel strip was wound as to the band web-like at 30 seconds from hot rolling completes, from the roll coil of strip after two minutes coiling completes, the temperature of the temperature of the temperature of the width central part of roll coil of strip periphery, the width central part of roll coil of strip inner peripheral surface and the side of roll coil of strip central part is all over the Ms point and below 700 ℃, and temperature head is in 300 ℃.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-062235 | 2011-03-22 | ||
| JP2011062235 | 2011-03-22 | ||
| PCT/JP2012/057123 WO2012128272A1 (en) | 2011-03-22 | 2012-03-21 | Method for winding hot-rolled maraging steel strip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103459619A true CN103459619A (en) | 2013-12-18 |
| CN103459619B CN103459619B (en) | 2015-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280014083.9A Active CN103459619B (en) | 2011-03-22 | 2012-03-21 | Method for winding hot-rolled maraging steel strip |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5344329B2 (en) |
| CN (1) | CN103459619B (en) |
| WO (1) | WO2012128272A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104662181A (en) * | 2012-09-21 | 2015-05-27 | 日立金属株式会社 | Method for manufacturing maraging steel coil |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60234920A (en) * | 1984-05-04 | 1985-11-21 | Nippon Kokan Kk <Nkk> | Manufacture of ultrahigh tensile maraging cold rolled steel plate |
| WO2004079022A1 (en) * | 2003-02-05 | 2004-09-16 | Usinor | Method of producing a cold-rolled band of dual-phase steel with a ferritic/martensitic structure and band thus obtained |
| CN101687238A (en) * | 2007-03-28 | 2010-03-31 | Sms西马格股份公司 | Method and device for winding hot-rolled strip |
| CN101755058A (en) * | 2007-06-22 | 2010-06-23 | Sms西马格股份公司 | Be used for method that the steel band that is formed from steel is carried out hot rolling and heat-treats |
-
2012
- 2012-03-21 JP JP2012538006A patent/JP5344329B2/en active Active
- 2012-03-21 WO PCT/JP2012/057123 patent/WO2012128272A1/en active Application Filing
- 2012-03-21 CN CN201280014083.9A patent/CN103459619B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60234920A (en) * | 1984-05-04 | 1985-11-21 | Nippon Kokan Kk <Nkk> | Manufacture of ultrahigh tensile maraging cold rolled steel plate |
| WO2004079022A1 (en) * | 2003-02-05 | 2004-09-16 | Usinor | Method of producing a cold-rolled band of dual-phase steel with a ferritic/martensitic structure and band thus obtained |
| CN101687238A (en) * | 2007-03-28 | 2010-03-31 | Sms西马格股份公司 | Method and device for winding hot-rolled strip |
| CN101755058A (en) * | 2007-06-22 | 2010-06-23 | Sms西马格股份公司 | Be used for method that the steel band that is formed from steel is carried out hot rolling and heat-treats |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104662181A (en) * | 2012-09-21 | 2015-05-27 | 日立金属株式会社 | Method for manufacturing maraging steel coil |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012128272A1 (en) | 2012-09-27 |
| CN103459619B (en) | 2015-06-10 |
| JPWO2012128272A1 (en) | 2014-07-24 |
| JP5344329B2 (en) | 2013-11-20 |
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