CN109234617A - A kind of no nickel hot rolling thin gauge weathering steel volume and its production method - Google Patents
A kind of no nickel hot rolling thin gauge weathering steel volume and its production method Download PDFInfo
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- CN109234617A CN109234617A CN201811062772.2A CN201811062772A CN109234617A CN 109234617 A CN109234617 A CN 109234617A CN 201811062772 A CN201811062772 A CN 201811062772A CN 109234617 A CN109234617 A CN 109234617A
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- thin gauge
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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
-
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
-
- 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
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (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 no nickel hot rolling thin gauge weathering steel volume and its production methods, the no nickel hot rolling weather-resisting coil of strip chemical component composition and mass percentage are as follows: C:0.07~0.10%, Si:0.25~0.35%, Mn:0.45~0.55%, P:0.07~0.10%, S≤0.012, Cu:0.25~0.35%, Cr:0.15~0.20%, surplus are Fe and inevitable impurity；The production method includes heating of plate blank, controlled rolling, controlled rolling cooling, coiling process.The weather-proof coil of strip of thin gauge of the present invention, it is designed using no nickel ingredient, it is controlled by rolling mill practice, it obtains with a thickness of 1.2~2.5mm, 355~455MPa of yield strength, 490~630MPa of tensile strength, elongation percentage >=22%, the weather-proof coil of strip of clod wash D=0.5a qualification, and realize industrialized production, meet the production needs of container.
Description
Technical field
The invention belongs to metallurgical technology fields, and in particular to a kind of no nickel hot rolling thin gauge weathering steel volume and its producer
Method.
Background technique
Weathering steel has ten in fields such as building, bridge, containers because exposure has fabulous corrosion resistance in air
Divide extensive use, needs to weld and deform during weathering steel use, therefore have very strictly its comprehensive performance
Requirement.The steel plate of Nowadays, Container shipping is mainly yield strength >=355MPa weathering steel, with the continuous increasing of transport quantity
Add, the demand of container is also constantly being increased, reduces being produced into for container originally by reducing being produced into for coil of strip
This, while also to the clod wash forming properties of steel plate, more stringent requirements are proposed.
Patent 201710701198 discloses Ultra-thin weathering steel and its production method, the alloying component of the weathering steel and
Weight percent content are as follows: C≤0.12%, Si:0.25-0.45%, Mn:0.20-0.45%, P:0.060-0.090%, S≤
0.015%, Cr:0.30-0.40%, Ni:0.15-0.20%, Cu:0.25-0.30%, remaining is Fe and inevitable impurity, is somebody's turn to do
Precious metal Ni:0.15-0.20% in patent increases the production cost of weathering steel.
Patent 2009100330576 discloses a kind of nickel-free weather-resistant steel and its method for preparing hot rolled plate thereof, a kind of nickel-free weather-resistant
Steel, it is characterised in that ingredient and weight percent content are as follows: C:0.05-0.10%, Si:0.35-0.50%, Mn:0.38-0.50%,
P:0.07-0.11%, S < 0.010%, Cr:0.45-0.60%, Cu:0.25-0.45%, B:0-50ppm, N < 0.0045%, remaining
For Fe.B element is added in the patent to guarantee the performance of steel plate, increases production cost, Si:0.35-0.50%, control interval
Larger, stability is poor.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of no nickel hot rolling thin gauge weathering steel volume and its production methods.It should
Method is designed using no nickel ingredient, is controlled by rolling mill practice, obtains the good weather-proof coil of strip of properties, and realize industry
Metaplasia produces, and meets the production needs of container.
In order to solve the above technical problems, the technical solution used in the present invention is: a kind of no nickel hot rolling thin gauge weathering steel
Volume, the no nickel hot rolling thin gauge weathering steel volume chemical component composition and its mass percentage are as follows: C:0.07~0.10%, Si:
0.25~0.35%, Mn:0.45~0.55%, P:0.07~0.10%, S≤0.012%, Cu:0.25~0.35%, Cr:0.15~
0.20%, surplus is Fe and inevitable impurity.
No nickel hot rolling thin gauge weathering steel volume of the present invention is with a thickness of 1.2~2.5mm.
No nickel hot rolling thin gauge weathering steel volume 355~455MPa of yield strength of the present invention, tensile strength 490~
630MPa, elongation percentage >=22%, clod wash D=0.5a are qualified.
The present invention also provides a kind of production methods of no nickel hot rolling thin gauge weathering steel volume, and the production method includes plate
Base heating, controlled rolling, controlled rolling cooling, coiling process；The controlled rolling process, roughing outlet temperature are 1090~1140
DEG C, exit temperature at finishing is 840~900 DEG C；The control cooling process, cooling velocity are 25~30 DEG C/s.
Controlled rolling process of the present invention, after 5 passes, outlet temperature is 1090~1140 DEG C for roughing.
Controlled rolling process of the present invention, after 7 passes, outlet temperature is 840~900 DEG C for finish rolling.
Control cooling process of the present invention, using section cooling, cooling velocity is 25~30 DEG C/s.
Heating of plate blank process of the present invention, slab heating temperature are 1250~1300 DEG C.
Coiling process of the present invention, coiling temperature are 570~630 DEG C.
Mentality of designing of the invention:
Rolling mill practice: using Controlled Rolling And Controlled Cooling, and deformation and heat treatment are combined, brilliant to obtain desired tissue and refinement
Grain improves material mechanical performance and cold bending performance.In rolling to avoid surface fire check caused by copper, 1100- is avoided
1200 DEG C of fire check sensitive temperature, reduces the enrichment of basal body interface copper, and slab heating temperature presses 1250~1300 DEG C of models
Contain system.
The selection of the chemical component in conjunction with designed by weather-proof coil of strip, rolling temperature has for precipitation strength and refined crystalline strengthening
Shifting influence, it is also noted that if rolling temperature height to make material when rolling in non-recrystallization state or not exclusively
State is recrystallized, the inadequate even mixed crystal of crystal grain refinement is may result in and influences forming property, taking into account the above, exit temperature at finishing is pressed
840~900 DEG C of scope controls, coiling temperature press 570~630 DEG C of scope controls.
The present invention refers to JIS G3125 without the weather-proof coil of strip product standard of nickel thin gauge；Properties of product detection method standard ginseng
Examine GB/T228, GB/T232.
The beneficial effects of adopting the technical scheme are that 1, the weather-proof coil of strip of thin gauge of the present invention, using no nickel
Ingredient design, is controlled by rolling mill practice, obtains the good weather-proof coil of strip of properties, and realize industrialized production.2, originally
The weather-proof coil of strip of invention thin gauge prolongs with a thickness of 1.2~2.5mm, 355~455MPa of yield strength, 490~630MPa of tensile strength
Rate >=22% is stretched, clod wash D=0.5a is qualified, meets the production needs of container.
Specific embodiment
The present invention will be further described in detail below with reference to specific embodiments.
Embodiment 1
The present embodiment is rolled up without nickel hot rolling thin gauge weathering steel with a thickness of 1.2mm, width 1250mm, chemical component composition and matter
Amount percentage composition is shown in Table 1.
The present embodiment includes that heating of plate blank, controlled rolling, controlled rolling are cold without the production method that nickel hot rolling thin gauge weathering steel is rolled up
But, coiling process, specific process step are as described below:
(1) heating of plate blank process: raw material is through 150 tons of vanadium extraction by converter blowing, 150 tons of converter smeltings, LF refining, RH refining, sheet billet continuous casting
Continuous casting steel billet is obtained, slab heating temperature is 1250 DEG C；
(2) controlled rolling process: after 5 passes, outlet temperature is 1090 DEG C for roughing；Finish rolling is after 7 passes, outlet
Temperature is 840 DEG C；
(3) it controls cooling process: using section cooling, cooling velocity is 25 DEG C/s；
(4) coiling process: coiling temperature is 570 DEG C.
The present embodiment is 375MPa, tensile strength 510MPa without nickel hot rolling thin gauge weathering steel volume yield strength, is extended
Rate is 25%, and clod wash D=0.5a is qualified.
Embodiment 2
The present embodiment is rolled up without nickel hot rolling thin gauge weathering steel with a thickness of 1.5mm, width 1250mm, chemical component composition and matter
Amount percentage composition is shown in Table 1.
The present embodiment includes that heating of plate blank, controlled rolling, controlled rolling are cold without the production method that nickel hot rolling thin gauge weathering steel is rolled up
But, coiling process, specific process step are as described below:
(1) heating of plate blank process: raw material is through 150 tons of vanadium extraction by converter blowing, 150 tons of converter smeltings, LF refining, RH refining, sheet billet continuous casting
Continuous casting steel billet is obtained, slab heating temperature is 1270 DEG C；
(2) controlled rolling process: after 5 passes, outlet temperature is 1130 DEG C for roughing；Finish rolling is after 7 passes, outlet
Temperature is 890 DEG C；
(3) it controls cooling process: using section cooling, cooling velocity is 26 DEG C/s；
(4) coiling process: coiling temperature is 610 DEG C.
The present embodiment is 365MPa, tensile strength 515MPa without nickel hot rolling thin gauge weathering steel volume yield strength, is extended
Rate is 25%, and clod wash D=0.5a is qualified.
Embodiment 3
The present embodiment is rolled up without nickel hot rolling thin gauge weathering steel with a thickness of 1.8mm, width 1250mm, chemical component composition and matter
Amount percentage composition is shown in Table 1.
The present embodiment includes that heating of plate blank, controlled rolling, controlled rolling are cold without the production method that nickel hot rolling thin gauge weathering steel is rolled up
But, coiling process, specific process step are as described below:
(1) heating of plate blank process: raw material is through 150 tons of vanadium extraction by converter blowing, 150 tons of converter smeltings, LF refining, RH refining, sheet billet continuous casting
Continuous casting steel billet is obtained, slab heating temperature is 1260 DEG C；
(2) controlled rolling process: after 5 passes, outlet temperature is 1100 DEG C for roughing；Finish rolling is after 7 passes, outlet
Temperature is 860 DEG C；
(3) it controls cooling process: using section cooling, cooling velocity is 27 DEG C/s；
(4) coiling process: coiling temperature is 600 DEG C.
The present embodiment is 370MPa, tensile strength 520MPa without nickel hot rolling thin gauge weathering steel volume yield strength, is extended
Rate is 26%, and clod wash D=0.5a is qualified.
Embodiment 4
The present embodiment is rolled up without nickel hot rolling thin gauge weathering steel with a thickness of 2.0mm, width 1250mm, chemical component composition and matter
Amount percentage composition is shown in Table 1.
The present embodiment includes that heating of plate blank, controlled rolling, controlled rolling are cold without the production method that nickel hot rolling thin gauge weathering steel is rolled up
But, coiling process, specific process step are as described below:
(1) heating of plate blank process: raw material is through 150 tons of vanadium extraction by converter blowing, 150 tons of converter smeltings, LF refining, RH refining, sheet billet continuous casting
Continuous casting steel billet is obtained, slab heating temperature is 1280 DEG C；
(2) controlled rolling process: after 5 passes, outlet temperature is 1120 DEG C for roughing；Finish rolling is after 7 passes, outlet
Temperature is 880 DEG C；
(3) it controls cooling process: using section cooling, cooling velocity is 28 DEG C/s；
(4) coiling process: coiling temperature is 610 DEG C.
The present embodiment is 385MPa, tensile strength 525MPa without nickel hot rolling thin gauge weathering steel volume yield strength, is extended
Rate is 28%, and clod wash D=0.5a is qualified.
Embodiment 5
The present embodiment is rolled up without nickel hot rolling thin gauge weathering steel with a thickness of 2.5mm, width 1250mm, chemical component composition and matter
Amount percentage composition is shown in Table 1.
The present embodiment includes that heating of plate blank, controlled rolling, controlled rolling are cold without the production method that nickel hot rolling thin gauge weathering steel is rolled up
But, coiling process, specific process step are as described below:
(1) heating of plate blank process: raw material is through 150 tons of vanadium extraction by converter blowing, 150 tons of converter smeltings, LF refining, RH refining, sheet billet continuous casting
Continuous casting steel billet is obtained, slab heating temperature is 1300 DEG C；
(2) controlled rolling process: after 5 passes, outlet temperature is 1140 DEG C for roughing；Finish rolling is after 7 passes, outlet
Temperature is 900 DEG C；
(3) it controls cooling process: using section cooling, cooling velocity is 30 DEG C/s；
(4) coiling process: coiling temperature is 630 DEG C.
The present embodiment is 380MPa, tensile strength 520MPa without nickel hot rolling thin gauge weathering steel volume yield strength, is extended
Rate is 26%, and clod wash D=0.5a is qualified.
Embodiment 6
The present embodiment is rolled up without nickel hot rolling thin gauge weathering steel with a thickness of 2.2mm, width 1250mm, chemical component composition and matter
Amount percentage composition is shown in Table 1.
The present embodiment includes that heating of plate blank, controlled rolling, controlled rolling are cold without the production method that nickel hot rolling thin gauge weathering steel is rolled up
But, coiling process, specific process step are as described below:
(1) heating of plate blank process: raw material is through 150 tons of vanadium extraction by converter blowing, 150 tons of converter smeltings, LF refining, RH refining, sheet billet continuous casting
Continuous casting steel billet is obtained, slab heating temperature is 1265 DEG C；
(2) controlled rolling process: after 5 passes, outlet temperature is 1110 DEG C for roughing；Finish rolling is after 7 passes, outlet
Temperature is 855 DEG C；
(3) it controls cooling process: using section cooling, cooling velocity is 26 DEG C/s；
(4) coiling process: coiling temperature is 605 DEG C.
The present embodiment is 450MPa, tensile strength 620MPa without nickel hot rolling thin gauge weathering steel volume yield strength, is extended
Rate is 29%, and clod wash D=0.5a is qualified.
Embodiment 7
The present embodiment is rolled up without nickel hot rolling thin gauge weathering steel with a thickness of 2.4mm, width 1250mm, chemical component composition and matter
Amount percentage composition is shown in Table 1.
The present embodiment includes that heating of plate blank, controlled rolling, controlled rolling are cold without the production method that nickel hot rolling thin gauge weathering steel is rolled up
But, coiling process, specific process step are as described below:
(1) heating of plate blank process: raw material is through 150 tons of vanadium extraction by converter blowing, 150 tons of converter smeltings, LF refining, RH refining, sheet billet continuous casting
Continuous casting steel billet is obtained, slab heating temperature is 1285 DEG C；
(2) controlled rolling process: after 5 passes, outlet temperature is 1125 DEG C for roughing；Finish rolling is after 7 passes, outlet
Temperature is 875 DEG C；
(3) it controls cooling process: using section cooling, cooling velocity is 29 DEG C/s；
(4) coiling process: coiling temperature is 615 DEG C.
The present embodiment is 455MPa, tensile strength 630MPa without nickel hot rolling thin gauge weathering steel volume yield strength, is extended
Rate is 26%, and clod wash D=0.5a is qualified.
Weather-proof steel chemical composition and mass percentage (wt%) in 1 embodiment 1-7 of table
Note: surplus is Fe and inevitable impurity in table 1
The above embodiments are only used to illustrate and not limit the technical solutions of the present invention, although referring to above-described embodiment to the present invention into
Go detailed description, those skilled in the art should understand that: it can still modify to the present invention or equally replace
It changes, without departing from the spirit or scope of the invention, or any substitutions, should all cover and be wanted in right of the invention
It asks in range.
Claims (9)
1. a kind of no nickel hot rolling thin gauge weathering steel volume, which is characterized in that the no nickel hot rolling thin gauge weathering steel volume chemistry at
It is grouped as and its mass percentage are as follows: C:0.07~0.10%, Si:0.25~0.35%, Mn:0.45~0.55%, P:0.07~
0.10%, S≤0.012%, Cu:0.25~0.35%, Cr:0.15~0.20%, surplus are Fe and inevitable impurity.
2. a kind of no nickel hot rolling thin gauge weathering steel volume according to claim 1, which is characterized in that the no nickel hot rolled thin
The weather-proof coil of strip of specification is with a thickness of 1.2~2.5mm.
3. a kind of no nickel hot rolling thin gauge weathering steel volume according to claim 1, which is characterized in that the no nickel hot rolled thin
The weather-proof coil of strip yield strength of specification 355~455MPa, 490~630MPa of tensile strength, elongation percentage >=22%, clod wash D=0.5a are closed
Lattice.
4. special based on a kind of production method of no nickel hot rolling thin gauge weathering steel volume described in claim 1-3 any one
Sign is that the production method includes heating of plate blank, controlled rolling, controlled rolling cooling, coiling process；The controlled rolling process,
Roughing outlet temperature is 1090~1140 DEG C, and exit temperature at finishing is 840~900 DEG C；The control cooling process, cooling velocity
For 25~30 DEG C/s.
5. a kind of production method of no nickel hot rolling thin gauge weathering steel volume according to claim 4, which is characterized in that described
Controlled rolling process, after 5 passes, outlet temperature is 1090~1140 DEG C for roughing.
6. a kind of production method of no nickel hot rolling thin gauge weathering steel volume according to claim 4, which is characterized in that described
Controlled rolling process, after 7 passes, outlet temperature is 840~900 DEG C for finish rolling.
7. a kind of production method of no nickel hot rolling thin gauge weathering steel volume, special according to claim 4-6 any one
Sign is that the control cooling process, using section cooling, cooling velocity is 25~30 DEG C/s.
8. a kind of production method of no nickel hot rolling thin gauge weathering steel volume, special according to claim 4-6 any one
Sign is that the heating of plate blank process, slab heating temperature is 1250~1300 DEG C.
9. a kind of production method of no nickel hot rolling thin gauge weathering steel volume, special according to claim 4-6 any one
Sign is that the coiling process, coiling temperature is 570~630 DEG C.
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| CN201811062772.2A CN109234617A (en) | 2018-09-12 | 2018-09-12 | A kind of no nickel hot rolling thin gauge weathering steel volume and its production method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111101070A (en) * | 2020-02-17 | 2020-05-05 | 本钢板材股份有限公司 | Steel for low-temperature liquid container tank car and preparation method thereof |
| CN111719081A (en) * | 2019-03-21 | 2020-09-29 | 本钢板材股份有限公司 | Control method for reducing cost of steel optimized alloy for container |
| CN114480972A (en) * | 2022-01-27 | 2022-05-13 | 马鞍山钢铁股份有限公司 | Thin-specification Ni-free weathering steel produced based on CSP process and production method thereof |
| CN114807730A (en) * | 2020-12-01 | 2022-07-29 | 广西柳州钢铁集团有限公司 | Nickel-free copper-phosphorus series weather-resistant steel casting blank |
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