CN106521327B - A kind of hot rolling acid-cleaning strip and its production method with high reaming performance - Google Patents
A kind of hot rolling acid-cleaning strip and its production method with high reaming performance Download PDFInfo
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- CN106521327B CN106521327B CN201611232202.4A CN201611232202A CN106521327B CN 106521327 B CN106521327 B CN 106521327B CN 201611232202 A CN201611232202 A CN 201611232202A CN 106521327 B CN106521327 B CN 106521327B
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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
- 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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- 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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
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- Mechanical Engineering (AREA)
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- Organic Chemistry (AREA)
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- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention discloses a kind of hot rolling acid-cleaning strips and its production method with high reaming performance, belong to steelmaking technical field.The chemical composition mass percent of the hot rolling acid-cleaning strip is：C：0.03%~0.1%, Si：≤ 0.1%, Mn：0.5%~1.5%, P≤0.02%, S≤0.006%, Nb≤0.05%, Ti≤0.1%, Mo≤0.15%, Re：0.1%~0.4%, remaining is Fe and inevitable impurity；The internal microstructure of the hot rolling acid-cleaning strip is ferrite.The production method includes：Molten iron pretreatment, casting, hot rolling, cooling, is batched, smooth and pickling at smelting, using water cooling+air-cooled+water cooling three-stage cooling pattern and control constant speed rolling.Tensile strength >=980MPa of the hot rolling acid-cleaning strip of acquisition, hole expansibility λ >=110%, elongation percentage >=20% have excellent strip surface quality.
Description
Technical field
The present invention relates to steelmaking technical field, more particularly to a kind of hot rolling acid-cleaning strip and its life with high reaming performance
Production method.
Background technology
The high reaming steel of hot rolling acid-cleaning is as a steel grade in advanced high-strength steel (AHSS), with traditional low-alloy high-strength
Degree, ferrito-martensite dual phase steel are compared, and with its high intensity, high reaming performance, are widely used for manufacture automobile spoke, bottom
The structural members such as the various frames of disk, car body.
With the development of automotive light weight technology, the parts such as automobile spoke, control arm, car body have pole to product strength, hole expansibility
The demand of high requirement, 980MPa grade products can step up.Traditional ferrite+martensite (F+M), although with compared with
High extensibility, but reaming performance is very low；The single-phase steel of homogeneous structure such as bainite, although hole expansibility is very high, extensibility
It can be relatively low.
Invention content
The object of the present invention is to provide a kind of hot rolling acid-cleaning strip and its production method with high reaming performance, Neng Goubao
Card 980MPa grades of hot rolling acid-cleaning steel of tensile strength have high hole expansibility and elongation percentage simultaneously.
On the one hand, to achieve the above object, the present invention provides a kind of hot rolling acid-cleaning strip with high reaming performance,
Chemical composition mass percent is：C：0.03%~0.1%, Si：≤ 0.1%, Mn：0.5%~1.5%, P≤0.02%, S≤
0.006%, Nb≤0.05%, Ti≤0.1%, Mo≤0.15%, Re：0.1%~0.4%, remaining is for Fe and inevitably
Impurity；
The internal microstructure of the hot rolling acid-cleaning strip is ferrite.
Further, tensile strength >=980MPa of the hot rolling acid-cleaning strip.
Further, hole expansibility λ >=110% of the hot rolling acid-cleaning strip, elongation percentage >=20%.
On the other hand, the present invention also provides a kind of production method of the hot rolling acid-cleaning strip with high reaming performance, packets
It includes：
After molten iron is pre-processed, by smelting and casting acquisition slab；
The slab is heated, then hot rolled plate is obtained through rolling；Wherein, the rolling uses constant speed rolling, and rolls
Speed control processed is in 5~10m/s；The rolling includes roughing and finish rolling, and control roughing final temperature is 1030~1130 DEG C, control
Finish rolling final temperature processed is 850~900 DEG C；
The hot rolled plate is cooled down stage by stage, hot rolled coil is coiled into after cooling；Wherein, described to be cooled to water stage by stage
The three-stage cooling pattern of cold+air-cooled+water cooling；
By the hot rolled coil after flattened, pickling, acquisition internal microstructure is ferritic strip.
Further, the hot rolled plate thickness specification variation range control is in 1.8~5mm.
Further, the three-stage cooling pattern of the water cooling+air-cooled+water cooling is specially：Extremely by hot rolled plate elder generation water cooling
650~700 DEG C, the air-cooled of 5~10s is then carried out, finally carries out water cooling again to 580~620 DEG C.
Further, the hot rolled coil it is smooth it is preceding be first cooled to room temperature, control smooth elongation percentage 1%~3%.
Further, the speed of service for controlling the pickling is 60m/min~100m/min.
Further, control the last one descaling bath pickling temperature be 80~90 DEG C, iron concentration control be 30~
40g/L。
Further, tensile strength >=980MPa of the hot rolling acid-cleaning strip, hole expansibility λ >=110%, elongation percentage >=
20%.
The one or more technical solutions provided in the embodiment of the present invention, have at least the following technical effects or advantages：
1, the hot rolling acid-cleaning strip with high reaming performance provided in the embodiment of the present invention, using C-Mn-Nb-Ti-Mo
Component system is eliminated to be originally present and be rolled along steel by adding rare earth element Re to optimize steel inclusion shape and size
The ribbon MnS of directional spreding processed, improves the hole expansibility of steel；It is single-phase ferrite by optimizing tissue pattern, improves steel
Elongation percentage and hole expansibility；Ensure tensile strength >=980MPa by the precipitation of second phase particles (Ti, Mo) C；It is anti-to ensure
980MPa grades of hot rolling acid-cleaning steel of tensile strength have high hole expansibility and elongation percentage simultaneously.
2, the production method of the hot rolling acid-cleaning strip with high reaming performance provided in the embodiment of the present invention, passes through optimization
The chemical composition of strip is precipitated using the three-stage cooling scheme control ferrite of water cooling+air-cooled+water cooling, is made by constant speed rolling
Tissue ratio is stablized, and coordinates smooth, acid cleaning process, obtains 980MPa grades of hot rolling acid-cleanings with high reaming performance of tensile strength
Strip；Tensile strength >=980MPa of the hot rolling acid-cleaning strip of acquisition, hole expansibility λ >=110%, elongation percentage >=20% have excellent
Different strip surface quality.
Description of the drawings
Fig. 1 is the organization chart for the hot rolling acid-cleaning strip that the embodiment of the present invention 1 obtains.
Specific implementation mode
The embodiment of the present invention, can by providing a kind of hot rolling acid-cleaning strip and its production method with high reaming performance
Ensure that 980MPa grades of hot rolling acid-cleaning steel of tensile strength have high hole expansibility and elongation percentage simultaneously；The hot rolling acid-cleaning strip of acquisition resists
Tensile strength >=980MPa, hole expansibility λ >=110%, elongation percentage >=20% have excellent strip surface quality.
To achieve the above object, the present invention provides a kind of hot rolling acid-cleaning strip with high reaming performance, chemistry at
Point mass percent is：C：0.03%~0.1%, Si：≤ 0.1%, Mn：0.5%~1.5%, P≤0.02%, S≤
0.006%, Nb≤0.05%, Ti≤0.1%, Mo≤0.15%, Re：0.1%~0.4%, remaining is for Fe and inevitably
Impurity；
The internal microstructure of the hot rolling acid-cleaning strip is ferrite.
The strip organization type that the embodiment of the present invention obtains is single-phase ferrite, and single-phase ferrite has excellent elongation percentage
And hole expansibility, strengthened by introducing second phase particles (Ti, Mo) C in ferrite matrix, with ferrite+bainite dual-phase steel
It compares, the high reaming steel product of the series has the coordinating of good cold formability, good reaming performance and fatigue behaviour.
The present invention forms the hot rolling acid-cleaning strip of the above chemical composition by optimized alloy element, is to be based on following original
Reason：
The embodiment of the present invention control C element content range be 0.03%-0.1%, basic elements of the C as C-Mn systems,
It is the important element for realizing microstructure and mechanical property, content is difficult to generate second phase particles (Ti, Mo) C less than 0.03%, into
And make strength reduction；Content is higher than 0.10%, is also easy to produce coarse carbide, and then reduce the elongation percentage and hole expansibility of steel.
Si constituent content≤0.1%, Si contents are higher that the red squama of surface of steel plate can be made to be difficult to remove for control of the embodiment of the present invention,
Influence surface quality.
It is that 0.5%~1.5%, Mn ensures steel as solution strengthening element that the embodiment of the present invention, which controls Mn element content ranges,
Intensity.Mn too high levels be easy to cause strand component segregation, it is too low then can not proof strength.
The embodiment of the present invention controls P element content≤0.02%, and P content is more than 0.02% to be easy in cyrystal boundary segregation, generation p
Crisp phenomenon.
Control S constituent contents≤0.006%, S of the embodiment of the present invention are easy to be mingled with Mn formation MnS, influence the reaming of steel
Rate.When S contents are more than 0.006%, the amount of inclusions is excessive, therefore controls its content≤0.006%.
Control Nb constituent contents≤0.05%, Nb of the embodiment of the present invention primarily serve the effect of crystal grain thinning, but fine grain is strong
Change and improves that yield strength is apparent, and it is exceeded to be easy to cause yield tensile ratio, therefore controls its content≤0.05%.
Control Ti of embodiment of the present invention constituent content≤0.1%, Mo constituent content≤0.15%, Ti/Mo elements are combined with C
Carbide is formed, product strength is improved.
It is 0.1%~0.4% that the embodiment of the present invention, which controls Re element content ranges, is optimized by adding rare earth element Re
Steel inclusion shape and size.When addition Re contents are 0.1%~0.4%, spherical rare-earth sulfide still keeps tiny
Spherical or spindle, is relatively evenly distributed in steel, eliminates the ribbon being originally present along steel rolling directional spreding
MnS, to improve the hole expansibility of steel.
Through the above as can be seen that the present invention optimizes steel inclusion shape and ruler by adding rare earth element Re
It is very little, the ribbon MnS being originally present along steel rolling directional spreding is eliminated, the hole expansibility of steel is improved；And optimizing tissue shape
Looks are single-phase ferrite, improve the elongation percentage and hole expansibility of steel；Ensure tension by the precipitation of second phase particles (Ti, Mo) C
Intensity >=980MPa.Chemical composition is optimized in the present invention, is designed using mentioned component, can obtain with high hole expandability
The hot rolling acid-cleaning strip of energy, tensile strength >=980MPa of strip, hole expansibility λ >=110%, elongation percentage >=20%.
For above-mentioned Multiphase Steel, the invention also provides a kind of production methods.
A kind of production method of the hot rolling acid-cleaning strip with high reaming performance, includes the following steps：Molten iron pretreatment →
→ smooth → pickling is batched in smelting → casting → hot rolling → cooling →；
After molten iron is pre-processed, slab is obtained by converter smelting, LF refining and continuous casting；Its chemical composition mass percent
For：C：0.03%~0.1%, Si：≤ 0.1%, Mn：0.5%~1.5%, P≤0.02%, S≤0.006%, Nb≤
0.05%, Ti≤0.1%, Mo≤0.15%, Re：0.1%~0.4%, remaining is Fe and inevitable impurity.
Slab is heated, then hot rolled plate is obtained through rolling；In the present embodiment, rolling uses constant speed rolling, hot rolled plate
The control of thickness specification variation range is in 1.8~5mm, and mill speed is according to thickness change and control is in 5~10m/s.Using constant speed
Rolling can be such that the organizational controls of entire volume and tissue ratio stablizes in target zone, and stability is ensured very well.
Wherein, rolling includes roughing and finish rolling, and control roughing final temperature is 1030~1130 DEG C, and control finish rolling terminates temperature
Degree is 850~900 DEG C.
After hot rolling, the hot rolled plate is cooled down stage by stage, hot rolled coil is coiled into after cooling.In the present embodiment, institute
State the three-stage cooling pattern for being cooled to water cooling+air-cooled+water cooling stage by stage；In specific implementation process, by the first quick water cooling of hot rolled plate
To 650~700 DEG C, the air-cooled of 5~10s is then carried out, finally carries out water cooling again to 580~620 DEG C.Using three-stage cooling mould
Formula controls temperature and air cooling time after suitable one section of water cooling, realizes that rationally control ferrite is precipitated, and ensures that matrix has
Excellent uniformity.The cooling rate of control first stage water cooling is 20~60 DEG C/s, the cooling rate of phase III water cooling be 20~60 DEG C/
S is conducive to ferritic precipitation.
It carries out smooth after hot rolled coil is cooled to room temperature, controls smooth elongation percentage 1%~3%.
Pickling carried out to the hot rolled coil after smooth, in the present embodiment, using shallow slot turbulent flow type pickling, control strip operation speed
Degree is 60m/min~100m/min, and control the last one descaling bath pickling temperature be 80~90 DEG C, iron concentration be 30~
40g/L。
Belt steel surface color is canescence after pickling, using drying, after batching, packing after two-sided electrostatic painting anticorrosive oil
As finished product, it is ferritic hot rolling acid-cleaning strip to produce internal microstructure.
Through the above as can be seen that the producer of the hot rolling acid-cleaning strip provided by the invention with high reaming performance
Method by optimizing the chemical composition of strip, while using constant speed rolling so that the organizational controls of entire volume and group in production technology
It knits ratio to stablize in target zone, stability is ensured very well；Using three-stage cooling pattern, suitable one section of control
Temperature and air cooling time after water cooling realize that rationally control ferrite is precipitated, and ensure that matrix has excellent uniformity.Root
Hot rolling acid-cleaning strip according to the present embodiment production has following performance：Tensile strength >=980MPa, hole expansibility λ >=110% extend
Rate >=20%.
It is for a more detailed description to the present invention by the following examples.These embodiments are only to the best embodiment party of the present invention
The description of formula does not have the scope of the present invention any limitation.
The hot rolling acid-cleaning band steel chemical composition of the embodiment of the present invention is as shown in table 1.
1 embodiment hot rolling acid-cleaning band composition of steel of table (%, remaining is Fe and inevitable impurity)
| Embodiment | C | Si | Mn | P | S | Nb | Ti | Mo | Re |
| Embodiment 1 | 0.05 | 0.08 | 1.0 | 0.015 | 0.001 | 0.02 | 0.1 | 0.13 | 0.3 |
| Embodiment 2 | 0.09 | 0.03 | 1.1 | 0.012 | 0.002 | 0.015 | 0.07 | 0.10 | 0.10 |
| Embodiment 3 | 0.03 | 0.08 | 1.4 | 0.015 | 0.002 | 0.035 | 0.09 | 0.13 | 0.20 |
| Embodiment 4 | 0.1 | 0.05 | 0.5 | 0.017 | 0.003 | 0.03 | 0.08 | 0.12 | 0.4 |
The steel of heterogeneity shown in table 1 is heated after smelting and casting, processes to obtain tension by technique shown in table 2
980MPa grades of hot rolling acid-cleaning strips with high reaming performance of intensity.
The technology controlling and process and hot rolling acid-cleaning strip property of the embodiment of the present invention are as shown in table 2.
2 embodiment technology controlling and process of table and hot rolling acid-cleaning strip property
Fig. 1 is the organization chart for the hot rolling acid-cleaning strip that the embodiment of the present invention 1 obtains, as seen from Figure 1：The group of the strip
It is woven to ferrite, and has excellent uniformity, shows to use composition design and technology controlling and process in the embodiment of the present invention to obtain
Single-phase ferrite destination organization.
The one or more technical solutions provided in the embodiment of the present invention, have at least the following technical effects or advantages：
1, the hot rolling acid-cleaning strip with high reaming performance provided in the embodiment of the present invention, using C-Mn-Nb-Ti-Mo
Component system is eliminated to be originally present and be rolled along steel by adding rare earth element Re to optimize steel inclusion shape and size
The ribbon MnS of directional spreding processed, improves the hole expansibility of steel；It is single-phase ferrite by optimizing tissue pattern, improves steel
Elongation percentage and hole expansibility；Ensure tensile strength >=980MPa by the precipitation of second phase particles (Ti, Mo) C；It is anti-to ensure
980MPa grades of hot rolling acid-cleaning steel of tensile strength have high hole expansibility and elongation percentage simultaneously.
2, the production method of the hot rolling acid-cleaning strip with high reaming performance provided in the embodiment of the present invention, passes through optimization
The chemical composition of strip is precipitated using the three-stage cooling scheme control ferrite of water cooling+air-cooled+water cooling, is made by constant speed rolling
Tissue ratio is stablized, and coordinates smooth, acid cleaning process, obtains 980MPa grades of hot rolling acid-cleanings with high reaming performance of tensile strength
Strip；Tensile strength >=980MPa of the hot rolling acid-cleaning strip of acquisition, hole expansibility λ >=110%, elongation percentage >=20% have excellent
Different strip surface quality.
It should be noted last that the above specific implementation mode is merely illustrative of the technical solution of the present invention and unrestricted,
Although being described the invention in detail with reference to example, it will be understood by those of ordinary skill in the art that, it can be to the present invention
Technical solution be modified or replaced equivalently, without departing from the spirit of the technical scheme of the invention and range, should all cover
In the scope of the claims of the present invention.
Claims (3)
1. a kind of production method of the hot rolling acid-cleaning strip with high reaming performance, which is characterized in that the hot rolling acid-cleaning strip
Chemical composition mass percent is：C：0.03%~0.1%, Si：≤ 0.1%, Mn：0.5%~1.5%, P≤0.02%, S≤
0.006%, Nb≤0.05%, Ti≤0.1%, Mo≤0.15%, Re：0.1%~0.4%, remaining is for Fe and inevitably
Impurity；The internal microstructure of the hot rolling acid-cleaning strip is ferrite；The production method includes：
After molten iron is pre-processed, by smelting and casting acquisition slab；
The slab is heated, then hot rolled plate is obtained through rolling；Wherein, the rolling uses constant speed rolling, and rolls speed
Degree control is in 5~10m/s；The rolling includes roughing and finish rolling, and control roughing final temperature is 1030~1130 DEG C, control essence
It is 850~900 DEG C to roll final temperature；
The hot rolled plate is cooled down stage by stage, hot rolled coil is coiled into after cooling；Wherein, it is described be cooled to stage by stage water cooling+
The three-stage cooling pattern of air-cooled+water cooling；Specially：By hot rolled plate elder generation water cooling to 650~700 DEG C, cooling rate be 20~60 DEG C/
Then s carries out the air-cooled of 5~10s, it is 20~60 DEG C/s finally to carry out water cooling to 600~620 DEG C, cooling rate again；
By the hot rolled coil after flattened, pickling, acquisition internal microstructure is ferritic strip；
In the acid cleaning process, the speed of service for controlling the pickling is 60m/min~100m/min, controls the last one acid
Washing trough pickling temperature is 80~90 DEG C, iron concentration control is 30~40g/L；
Tensile strength >=980MPa of the hot rolling acid-cleaning strip, hole expansibility λ >=110%, elongation percentage >=20%.
2. the production method of the hot rolling acid-cleaning strip with high reaming performance as described in claim 1, which is characterized in that described
Hot rolled plate thickness specification variation range is controlled in 1.8~5mm.
3. the production method of the hot rolling acid-cleaning strip with high reaming performance as described in claim 1, which is characterized in that described
Hot rolled coil it is smooth it is preceding be first cooled to room temperature, control smooth elongation percentage 1%~3%.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108048734A (en) * | 2017-11-16 | 2018-05-18 | 首钢集团有限公司 | A kind of tensile strength 700MPa grades of hot rolling Multiphase Steels and its production method |
| CN108570604A (en) * | 2018-04-28 | 2018-09-25 | 唐山钢铁集团有限责任公司 | A kind of high reaming steel band of 780MPa grades of hot rolling acid-cleaning and its production method |
| CN109576569B (en) * | 2018-07-20 | 2021-05-25 | 首钢集团有限公司 | Steel for automobile torsion beam and preparation method thereof |
| CN108998740A (en) * | 2018-08-01 | 2018-12-14 | 首钢集团有限公司 | A kind of water heater liner bracket hot rolling acid-cleaning strip and its production method |
| CN108998739B (en) * | 2018-08-01 | 2020-12-15 | 首钢集团有限公司 | Hot-rolled pickled strip steel with high hole expanding performance and production method thereof |
| CN110512146A (en) * | 2019-09-05 | 2019-11-29 | 首钢集团有限公司 | A kind of super high strength hot rolled pickling reaming steel and its production method with Good All-around Property |
| CN112575267A (en) * | 2019-09-27 | 2021-03-30 | 宝山钢铁股份有限公司 | High-hole-expansion complex phase steel and manufacturing method thereof |
| CN114875337B (en) * | 2022-05-31 | 2022-11-11 | 东风商用车有限公司 | Method for obtaining high-strength steel roll-formed rim |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1732279A (en) * | 2002-12-24 | 2006-02-08 | 新日本制铁株式会社 | Good burring property high strength steel sheet excellent in softening resistance in welded heat affecting zone, and its production method |
| CN1759198A (en) * | 2003-03-24 | 2006-04-12 | 新日本制铁株式会社 | High strength hot rolled steel sheet excelling in bore expandability and ductility and process for producing the same |
| CN101999007A (en) * | 2008-04-10 | 2011-03-30 | 新日本制铁株式会社 | High-strength steel sheets which are extremely excellent in the balance between burring workability and ductility and excellent in fatigue endurance, zinc-coated steel sheets, and processes for production of both |
| CN102517496A (en) * | 2011-12-23 | 2012-06-27 | 首钢总公司 | Hot rolled ferrite/martensite double phase steel and production method thereof |
-
2016
- 2016-12-27 CN CN201611232202.4A patent/CN106521327B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1732279A (en) * | 2002-12-24 | 2006-02-08 | 新日本制铁株式会社 | Good burring property high strength steel sheet excellent in softening resistance in welded heat affecting zone, and its production method |
| CN1759198A (en) * | 2003-03-24 | 2006-04-12 | 新日本制铁株式会社 | High strength hot rolled steel sheet excelling in bore expandability and ductility and process for producing the same |
| CN101999007A (en) * | 2008-04-10 | 2011-03-30 | 新日本制铁株式会社 | High-strength steel sheets which are extremely excellent in the balance between burring workability and ductility and excellent in fatigue endurance, zinc-coated steel sheets, and processes for production of both |
| CN102517496A (en) * | 2011-12-23 | 2012-06-27 | 首钢总公司 | Hot rolled ferrite/martensite double phase steel and production method thereof |
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