CN109440015A - A kind of 400MPa grades of cold rolling sliding rail steel and its manufacturing method - Google Patents
A kind of 400MPa grades of cold rolling sliding rail steel and its manufacturing method Download PDFInfo
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- CN109440015A CN109440015A CN201811338632.3A CN201811338632A CN109440015A CN 109440015 A CN109440015 A CN 109440015A CN 201811338632 A CN201811338632 A CN 201811338632A CN 109440015 A CN109440015 A CN 109440015A
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- temperature
- sliding rail
- heating
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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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- 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
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- 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
-
- 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
- C21D8/0273—Final recrystallisation annealing
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
-
- 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
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention discloses a kind of 400MPa grades of cold rolling sliding rail steel, the chemical components including following mass percent: C≤0.21%；Si≤0.04%；Mn≤1.4%；P≤0.035%；S≤0.025；Al 0.015~0.040, remaining is Fe and is unavoidably mingled with, and mass fraction amounts to 100%；Its manufacturing method is also disclosed.400MPa grade cold rolling sliding rail steel of the invention not only increases the intensity and surface hardness of material, and guarantees to promote surface abrasion resistance while good processability.
Description
Technical field
The present invention relates to a kind of automobile and household electrical appliances 400MPa grades of cold rolling sliding rail steel and its manufacturing method, finished product thicknesses 1.0
The manufacturing method of~1.8mm belongs to metallurgical material field.The invention material is mainly used for automotive seat slideway, furniture and household electrical appliances
Drawer ball slideway etc..
Background technique
The fast development of automobile, household electrical appliances and furniture industry, it is increasingly stringent with steel quality requirement to cold rolling slideway and sliding rail, it is right
The consumption figure of cold rolling sliding rail steel increases year by year.Sliding rail steel is higher to the strength of materials, dimension precision requirement, to guarantee material by means of rolling
Indeformable under processing, assembly precision and on-load strength conditions, cracking.To meet complicated use environment and more demanding table
Face performance, needs to formulate stringent process system from steel-making, hot rolling and cold rolling process, mass simultaneous steady production difficulty compared with
Greatly.
Summary of the invention
In order to solve the above-mentioned technical problem, the object of the present invention is to provide a kind of manufacturers of 400MPa grades of cold rolling sliding rail steel
Method not only improves the intensity and surface hardness of material, but also guarantees to promote surface abrasion resistance while good processability.
In order to solve the above technical problems, the present invention adopts the following technical scheme:
A kind of manufacturing method of 400MPa grades of cold rolling sliding rail steel, the chemical component including following mass percent: C≤
0.21%；Si≤0.04%；Mn≤1.4%；P≤0.035%；S≤0.025；Al 0.015~0.040, remaining is for Fe and not
It can avoid being mingled with, mass fraction amounts to 100%.
Further, the chemical component including following mass percent: C≤0.21%；Si≤0.04%；Mn≤1.4%；
P≤0.035%；S≤0.025；Al 0.020~0.030, remaining is Fe and is unavoidably mingled with, and mass fraction amounts to
100%.
A kind of manufacturing method of 400MPa grades of cold rolling sliding rail steel, which is characterized in that including people's following steps:
S1 smelts
S1.1 converter smelting: the preprocessed desulfurization of molten iron carries out converter smelting, and later period addition silicon is smelted in oxygen decarburization heating
Iron, Fe-al-mn Deoxidizing control P, S ingredient, prevent molten steel peroxidating, and 1600~1630 DEG C of tapping temperature, converter tapping P≤
0.010%, S≤0.010%；
S1.2 refining: gon technics are used, refining process keeps good reducing atmosphere, using Al deoxidations, LF later period
It adds manganese iron and carries out alloying, carry out Calcium treatment after LF；
S1.3 continuous casting: molten steel is controlled into tundish temperature at 1510-1530 DEG C, and 25~40 DEG C of the degree of superheat, casting speed control exists
0.90-1.10m/min；
S2 hot rolling
Using stepped heating stove heating slab, heating process is shown in Table 1, and roughing is rolled using Stand Mill R1 and R2 reciprocation type
System, for the roughing mode used for 3+3, finish rolling uses F1~F7 continuous rolling process, and specific hot rolling technology is shown in Table 2；
1 slab heating cycle of table
| Heating temperature DEG C | Heating time min | Soaking temperature DEG C | Soaking time min | Tapping temperature DEG C |
| 1200~1225 | 180~300 | 1210~1240 | 30~60 | 1120~1250 |
2 hot rolling process of table
| Roughing finishing temperature (DEG C) | Finish rolling start rolling temperature (DEG C) | Finish rolling finishing temperature (DEG C) | Coiling temperature (DEG C) | The type of cooling |
| 980~1100 | 980~1050 | 840~880 | 630~670 | Preceding dispersion |
S3 annealing
Annealing uses vertical continuous annealing furnace, uses reducing atmosphere and nitrogen hydrogen hybrid protection atmosphere cooling in furnace；Heating
Each section of outlet temperature control situation of furnace is shown in Table 3, and planisher elongation percentage different-thickness control situation is shown in Table 4.
3 annealing process of table
4 planisher elongation percentage of table
| Finished product thickness mm (H) | Planisher elongation percentage % |
| 1.2≥H≥1.0 | 1.6±0.1 |
| 1.8 >=H > 1.2 | 1.8±0.1 |
Further, in the step S1.2, using LF whole process gon technics.
Further, in the step S1, converter smelting uses the pre- desulphurised hot metal of KR, ferrosilicon, manganese iron, and molten steel overall process is blown
Argon stirring, continuous casting degree of superheat Δ T≤20~40 DEG C.
Compared with prior art, advantageous effects of the invention:
Design of Chemical Composition of the invention adds C, Si and Mn element, improves the intensity and surface hardness of material, is implemented as
Product 320~360MPa of yield strength, tensile strength >=420Mpa, elongation after fracture >=31% (tensile testing: L0=80mm, b=
20mm), 0.4 μm of surface roughness is hereinafter, surface rockwell hardness HR15T 80~83, guarantees to be promoted while good processability
Surface abrasion resistance.
Detailed description of the invention
The invention will be further described for explanation with reference to the accompanying drawing.
Fig. 1 is the finished product metallographic structure of 400MPa grades of cold rolling sliding rail steel of the present invention.
Specific embodiment
A kind of 400MPa grades of cold rolling sliding rail steel, the chemical component of mass percent: C≤0.21%；Si≤0.04%；Mn
≤ 1.4%；P≤0.035%；S≤0.025；Al 0.015~0.040, remaining is Fe and is unavoidably mingled with, and mass fraction is total
It is calculated as 100%.The main of the material composition utilizes C, Si and Mn element, guarantees to promote surface abrasion resistance while good processability
Performance.
Wherein converter smelting uses the pre- desulphurised hot metal of KR, ferrosilicon, manganese iron, the stirring of molten steel overall process Argon, the continuous casting degree of superheat
Δ T≤20~40 DEG C.
The 2250mm hot continuous rolling process of slab are as follows: heating of plate blank → high-pressure water descaling → fixed-width pressure machine → E1R1 roughing mill
Rolling → E2R2 roughing mill rolling → flying shear → high-pressure water descaling → F1~F7 finishing mill rolling → ciphering type section cooling → volume
Take → template transport system → sampling, inspection.Its slab heating temperature is 1220 ± 20 DEG C；Heating time >=130min；Roughing
Mode uses 3+3；840~800 DEG C of finish rolling finishing temperature, coiling temperature is 630~670 DEG C.
Cold-rolling process: acid roll uncoiling → welding → straightening → pickling → rinsing → drying → trimming → tandem mill cold rolling → point
Cut → batch → offline inspection → weighing → mark → bundling → packaging → storage → continuous annealing uncoiling → welding → cleaning → entrance
Loop → annealing furnace → outlet looping → smooth → inspection loop → trimming → surface inspection → oiling → batches → weighing → and takes
Sample, inspection.Parameter and annealing: heating and 715~725 DEG C of soaking zone outlet temperature, 600~620 DEG C of slow cooling section outlet temperature,
390~410 DEG C of rapid cooling section outlet temperature, 350~400 DEG C of overaging section temperature, whole cold section of outlet temperature≤150 DEG C, planisher
Elongation percentage 1.5~1.8%.
Embodiment 1
S1 smelts
S1.1 converter smelting: the preprocessed desulfurization of molten iron carries out converter smelting, and later period addition silicon is smelted in oxygen decarburization heating
Iron, Fe-al-mn Deoxidizing control P, S ingredient, prevent molten steel peroxidating, and 1600~1630 DEG C of tapping temperature, converter tapping [P]
≤ 0.010%, [S]≤0.010%.
S1.2 refining: using LF whole process gon technics, and refining process keeps good reducing atmosphere, using Al deoxidations,
The LF later period adds manganese iron and carries out alloying, carries out Calcium treatment after LF.
S1.3 continuous casting: molten steel is controlled into tundish temperature at 1510-1530 DEG C, and 25~40 DEG C of the degree of superheat, casting speed control exists
0.90-1.10m/min。
S2 hot rolling
Using stepped heating stove heating slab (heating process is shown in Table 1), roughing is rolled using Stand Mill R1 and R2 reciprocation type
System, for the roughing mode used for 3+3, finish rolling uses F1~F7 continuous rolling process, and specific hot rolling technology is shown in Table 2.
1 slab heating cycle of table
| Heating temperature DEG C | Heating time min | Soaking temperature DEG C | Soaking time min | Tapping temperature DEG C |
| 1200~1225 | 180~300 | 1210~1240 | 30~60 | 1120~1250 |
2 rolling mill practice of table
| Roughing finishing temperature (DEG C) | Finish rolling start rolling temperature (DEG C) | Finish rolling finishing temperature (DEG C) | Coiling temperature (DEG C) | The type of cooling |
| 980~1100 | 980~1050 | 840~880 | 630~670 | Preceding dispersion |
S3 annealing
Annealing uses vertical continuous annealing furnace, uses reducing atmosphere and nitrogen hydrogen hybrid protection atmosphere cooling in furnace.Heating
Each section of outlet temperature control situation of furnace is shown in Table 3, and planisher elongation percentage different-thickness control situation is shown in Table 4.
3 annealing process of table
4 planisher elongation percentage of table
| Finished product thickness mm (H) | Planisher elongation percentage % |
| 1.2≥H≥1.0 | 1.6±0.1 |
| 1.8 >=H > 1.2 | 1.8±0.1 |
S4 embodiment interpretation of result
S4.1 makes steel ingredient
According to above process for making requirement, practical slab chemical component (mass percent) is as shown in table 5 below.
5 example chemical component of table
| Chemical element | C | Si | Mn | P |
| Actual range | 0.17~0.20 | 0.02~0.04 | 0.30~0.45 | 0.08~0.015 |
S4.2 end properties
Cold rolling is carried out on the basis of above-mentioned hot rolling performance and annealing, the room temperature tensile mechanical property of finished product are shown in Table 6, metallographic
Tissue is isometric ferrite, and 11 grades of grain size, Fig. 1 sees in tissue topography.
6 finished product tensile property of table
In conclusion this product passage capacity is examined and user uses properties meet demand, batch is met and has used
In the production of automotive seat slideway and household electrical appliances drawer sliding rail.
Embodiment described above is only that preferred embodiment of the invention is described, and is not carried out to the scope of the present invention
It limits, without departing from the spirit of the design of the present invention, those of ordinary skill in the art make technical solution of the present invention
Various changes and improvements, should all fall into claims of the present invention determine protection scope in.
Claims (5)
1. a kind of 400MPa grades of cold rolling sliding rail steel, which is characterized in that the chemical component including following mass percent: C≤
0.21%；Si≤0.04%；Mn≤1.4%；P≤0.035%；S≤0.025；Al 0.015~0.040, remaining is for Fe and not
It can avoid being mingled with, mass fraction amounts to 100%.
2. 400MPa grades of cold rolling sliding rail steel according to claim 1, which is characterized in that it is characterised in that it includes following matter
Measure the chemical component of percentage: C≤0.21%；Si≤0.04%；Mn≤1.4%；P≤0.035%；S≤0.025；Al
0.020~0.030, remaining is Fe and is unavoidably mingled with, and mass fraction amounts to 100%.
3. a kind of manufacturing method of 400MPa grades of cold rolling sliding rail steel, which is characterized in that including people's following steps:
S1 smelting process
S1.1 converter smelting: the preprocessed desulfurization of molten iron carries out converter smelting, and oxygen decarburization heats up, smelting later period addition ferrosilicon,
Fe-al-mn Deoxidizing controls P, S ingredient, prevents molten steel peroxidating, and 1600~1630 DEG C of tapping temperature, converter tapping P≤
0.010%, S≤0.010%；
S1.2 refining: using gon technics, and refining process keeps good reducing atmosphere, and using Al deoxidations, the LF later period is added
Manganese iron carries out alloying, carries out Calcium treatment after LF；
S1.3 continuous casting: molten steel is controlled into tundish temperature at 1510-1530 DEG C, and 25~40 DEG C of the degree of superheat, casting speed control is in 0.90-
1.10m/min；
S2 hot rolling technology
Using stepped heating stove heating slab, heating process is shown in Table 1, and roughing is rolled using Stand Mill R1 and R2 reciprocation type, adopts
Roughing mode is 3+3, and finish rolling uses F1~F7 continuous rolling process, and specific hot rolling technology is shown in Table 2；
1 slab heating cycle of table
2 hot rolling process of table
S3 annealing
Annealing uses vertical continuous annealing furnace, uses reducing atmosphere and nitrogen hydrogen hybrid protection atmosphere cooling in furnace；Heating furnace is each
Section outlet temperature control situation is shown in Table 3, and planisher elongation percentage different-thickness control situation is shown in Table 4.
3 annealing process of table
4 planisher elongation percentage of table
4. the manufacturing method of 400MPa grades of cold rolling sliding rail steel according to claim 3, which is characterized in that the step S1.2
In, using LF whole process gon technics.
5. the manufacturing method of 400MPa grades of cold rolling sliding rail steel according to claim 3, which is characterized in that the step S1
In, converter smelting uses the pre- desulphurised hot metal of KR, ferrosilicon, manganese iron, and molten steel overall process Argon stirs, and continuous casting degree of superheat Δ T≤20~
40℃。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811338632.3A CN109440015A (en) | 2018-11-12 | 2018-11-12 | A kind of 400MPa grades of cold rolling sliding rail steel and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811338632.3A CN109440015A (en) | 2018-11-12 | 2018-11-12 | A kind of 400MPa grades of cold rolling sliding rail steel and its manufacturing method |
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| Publication Number | Publication Date |
|---|---|
| CN109440015A true CN109440015A (en) | 2019-03-08 |
Family
ID=65551991
Family Applications (1)
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| CN201811338632.3A Pending CN109440015A (en) | 2018-11-12 | 2018-11-12 | A kind of 400MPa grades of cold rolling sliding rail steel and its manufacturing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112281059A (en) * | 2020-10-19 | 2021-01-29 | 湖南华菱涟钢薄板有限公司 | High-hardness sliding rail steel and preparation method thereof |
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| CN107326277A (en) * | 2017-06-20 | 2017-11-07 | 河钢股份有限公司邯郸分公司 | 480MPa grades of galvanized steels and its production method |
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|---|---|---|---|---|
| JPS61113725A (en) * | 1984-11-08 | 1986-05-31 | Nippon Steel Corp | Manufacture of cold rolled steel sheet extremely superior in press formability |
| WO1997033706A1 (en) * | 1996-03-15 | 1997-09-18 | Kawasaki Steel Corporation | Ultra-thin sheet steel and method for manufacturing the same |
| CN102534360A (en) * | 2010-12-15 | 2012-07-04 | 鞍钢股份有限公司 | Production method of cold-rolled thin strip steel plate for slide rail |
| CN102560238A (en) * | 2010-12-15 | 2012-07-11 | 鞍钢股份有限公司 | Production method of cold-rolled thin strip steel plate for radiating fin |
| CN102416404A (en) * | 2011-09-21 | 2012-04-18 | 首钢总公司 | Method for producing cold-rolled steel strips |
| CN102719736A (en) * | 2012-06-12 | 2012-10-10 | 武汉钢铁(集团)公司 | Steel with yield ratio of 0.9 or more used for ultra-fine grain slideway and production method thereof |
| CN103276287A (en) * | 2013-06-08 | 2013-09-04 | 济钢集团有限公司 | Cold-rolled steel strip for high-drawing-performance flux-cored wire, and making method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112281059A (en) * | 2020-10-19 | 2021-01-29 | 湖南华菱涟钢薄板有限公司 | High-hardness sliding rail steel and preparation method thereof |
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