CN105088070A - Method for producing 380MPa-grade wheel steel - Google Patents
Method for producing 380MPa-grade wheel steel Download PDFInfo
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- CN105088070A CN105088070A CN201510352586.2A CN201510352586A CN105088070A CN 105088070 A CN105088070 A CN 105088070A CN 201510352586 A CN201510352586 A CN 201510352586A CN 105088070 A CN105088070 A CN 105088070A
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Abstract
The invention discloses a method for producing 380MPa-grade wheel steel and belongs to the technical field of materials. According to the technical scheme, the method for producing the 380MPa-grade wheel steel comprises the following technological steps that plate blank heating, high-pressure water dephosphorization, rough rolling, coiling through a hot coil box, finish rolling, laminar cooling and curling through a curling machine are conducted on a billet, and then the 380MPa-grade wheel steel is obtained. The billet comprises, by mass, 0.06%-0.10% of C, equal to or less than 0.10% of Si, 0.80%-1.10% of Mn, equal to or less than 0.020% of P, equal to or less than 0.010% of S, 0.010%-0.030% of Ti, 0.015%-0.050% of Als and the balance Fe and inevitable impurities. Ti is added into an original C-Mn strengthening system, and thus the strength and the weldability of the wheel steel are improved. Through the design of low-carbon and low-silicon components and reasonable adding of the Als, free N in the steel can be controlled, and the comprehensive performance of the wheel steel is improved.
Description
Technical field
The invention belongs to field of material technology, be specifically related to a kind of production method of producing 380MPa rank wheel-use steel material.
Background technology
Along with the development of modern automobile industry, the performance requriements of automobile to component is more and more stricter.Wheel is the main security parts of running car.Also be the important factor affecting vehicle performance simultaneously.The automotive wheel that carbon structural steel manufactures, because of opposing repeated stress ability, stand flexible life is low, will fatigure failure be there is in operation for some time, therefore, need the upgrading of material urgently, adopt automotive wheel special-purpose steel to be the most effective measures extending automotive wheel work-ing life.Advance material requirement has higher intensity, good plasticity and toughness, excellent creep-resistant property and fatigue performance, to reach the object that automobile realizes self loss of weight, reduces oil consumption, improves security while increasing load.
Summary of the invention
The object of the invention is to provide a kind of method for the production of 380MPa rank Wheel Steel.In former C-Mn fortification system, add Ti element, play microalloy element effect, while raising Wheel Steel intensity, improve its welding property.Low carbon low silicon Composition Design and reasonably interpolation Als can control free N element in steel, improve the over-all properties of Wheel Steel.
Technical scheme of the present invention is: a kind of production method of producing 380MPa rank wheel-use steel material, and described technical process is as follows: steel billet through heating of plate blank, high-pressure water descaling, roughing rolling, Coil Box is curling, finish rolling rolling, section cooling, crimping machine coiling process obtains 380MPa rank wheel-use steel material; The mass percent of described steel billet chemical composition is: C:0.06 ~ 0.10%, Si :≤0.10%, Mn:0.80 ~ 1.10%, P :≤0.020%, S :≤0.010%, Ti:0.010 ~ 0.030%, Als:0.015 ~ 0.050%, and all the other are Fe and inevitable impurity.
In heating of plate blank operation of the present invention, tapping temperature is 1180-1220 DEG C, heat-up time 140-200min.
Roughing rolling of the present invention, adopts 5 ~ 7 passes, ensures intermediate blank temperature 1000-1040 DEG C, workpiece thickness 32-51mm.
Finish rolling rolling process of the present invention: intermediate blank is through 7 rolling mill rollings, and finishing temperature is 860-890 DEG C.
Coil Box curling process of the present invention: Coil Box coiling temperature 980-1040 DEG C.
Section cooling operation of the present invention, rate of cooling 25-30 DEG C/s.
Crimping machine coiling process of the present invention, temperature is 550-600 DEG C.
The beneficial effect adopting technique scheme to produce is: 1, under existing smelting and Rolling Production appointed condition, utilize the effect of the micro-alloy element titanium in steel, that is: micro-alloy element titanium and C, N are combined into carbonitride, play precipitation strength effect when low temperature; Titanium can control strain aging in steel, reduces the brittle transition temperature of steel, strength and toughness is better coordinated, improves the welding property of steel simultaneously; 2, controlling the precipitation of carbon and carbonitride, austenitic recrystallize and austenitic deformation state by controlling the tapping temperature of steel rolling, intermediate blank temperature, finishing temperature and coiling temperature, obtaining the product that meets the demands; 3,380MPa rank automotive wheel steel adds tiny alloying element Ti on C-Mn basis, in conjunction with cooling controlling and rolling controlling process, improves the over-all properties of steel, particularly mechanical property and welding property, extend the work-ing life of wheel, have larger social benefit; 4, the present invention is by carrying out appropriate design to the chemical composition of steel grade, especially adds titanium elements and carries out microalloying, and adds compared with Nb, V element, and cost is lower, and improves the over-all properties of Wheel Steel.
Accompanying drawing explanation
Fig. 1 is present invention process schema.
Embodiment
Below in conjunction with the drawings and the specific embodiments, the present invention is further detailed explanation.
Embodiment 1:
The mass percent of steel billet chemical composition is: C:0.07%, Si:0.02%, Mn:0.90%, P:0.014%, S:0.006%, Ti:0.020%, Als:0.030%, and all the other are Fe and inevitable impurity.
Above-mentioned steel billet is put into process furnace heat, slab requires that hot charging enters stove, heating was required fully before≤1000 DEG C, in the tapping temperature that heating zone and soaking zone require rapid heating to reach slab to specify, prevent autstenitic grain size from growing up, steel billet reaches 1200 DEG C, comes out of the stove, heat-up time 140min; The rear slab of heating carries out slightly after high-pressure water descaling, finish rolling rolling, and roughing adopts 5 passes, intermediate blank temperature 1000 DEG C, workpiece thickness 45mm, Coil Box coiling temperature 1000 DEG C, the rolling of finish rolling 7 rolling mill, finishing temperature 890 DEG C, section cooling speed 27 DEG C/s, coiling temperature 600 DEG C, warehouse-in slow cooling experimental result yield strength: 325MPa after 24 hours, tensile strength: 415MPa, elongation: 41.5%, clod wash: D=0 is qualified.End properties meets the requirement of 380MPa rank Wheel Steel completely.
Embodiment 2:
The mass percent of steel billet chemical composition is: C:0.08%, Si:0.04%, Mn:0.92%, P:0.011%, S:0.002%, Ti:0.024%, Als:0.032%, and all the other are Fe and inevitable impurity.
Above-mentioned steel billet is put into process furnace heat, slab requires that hot charging enters stove, heating was required fully before≤1000 DEG C, in the tapping temperature that heating zone and soaking zone require rapid heating to reach slab to specify, prevent autstenitic grain size from growing up, steel billet reaches 1200 DEG C, comes out of the stove, heat-up time 200min; The rear slab of heating carries out slightly after high-pressure water descaling, finish rolling rolling, and roughing adopts 7 passes, intermediate blank temperature 1040 DEG C, workpiece thickness 45mm, Coil Box coiling temperature 1020 DEG C, the rolling of finish rolling 7 rolling mill, finishing temperature 870 DEG C, section cooling speed 29 DEG C/s, coiling temperature 550 DEG C, warehouse-in slow cooling experimental result yield strength: 320Mpa after 24 hours, tensile strength: 400MPa, elongation: 34.5%, clod wash: D=0 is qualified.End properties meets the requirement of 380Mpa rank Wheel Steel completely.
Embodiment 3:
The mass percent of steel billet chemical composition is: C:0.06%, Si:0.05%, Mn:0.80%, P:0.010%, S:0.005%, Ti:0.010%, Als:0.050%, and all the other are Fe and inevitable impurity.
Above-mentioned steel billet is put into process furnace heat, slab requires that hot charging enters stove, heating was required fully before≤1000 DEG C, in the tapping temperature that heating zone and soaking zone require rapid heating to reach slab to specify, prevent autstenitic grain size from growing up, steel billet reaches 1180 DEG C, comes out of the stove, heat-up time 180min; The rear slab of heating carries out slightly after high-pressure water descaling, finish rolling rolling, and roughing adopts 5 passes, intermediate blank temperature 1000 DEG C, workpiece thickness 32mm, Coil Box coiling temperature 980 DEG C, the rolling of finish rolling 7 rolling mill, finishing temperature 890 DEG C, section cooling speed 30 DEG C/s, coiling temperature 580 DEG C, warehouse-in slow cooling experimental result yield strength: 315MPa after 24 hours, tensile strength: 395MPa, elongation: 38.0%, clod wash: D=0 is qualified.End properties meets the requirement of 380MPa rank Wheel Steel completely.
Embodiment 4:
The mass percent of steel billet chemical composition is: C:0.10%, Si:0.10%, Mn:1.10%, P:0.020%, S:0.010%, Ti:0.030%, Als:0.050%, and all the other are Fe and inevitable impurity.
Above-mentioned steel billet is put into process furnace heat, slab requires that hot charging enters stove, heating was required fully before≤1000 DEG C, in the tapping temperature that heating zone and soaking zone require rapid heating to reach slab to specify, prevent autstenitic grain size from growing up, steel billet reaches 1220 DEG C, comes out of the stove, heat-up time 160min; The rear slab of heating carries out slightly after high-pressure water descaling, finish rolling rolling, and roughing adopts 7 passes, intermediate blank temperature 1040 DEG C, workpiece thickness 51mm, Coil Box coiling temperature 1040 DEG C, the rolling of finish rolling 7 rolling mill, finishing temperature 870 DEG C, rate of cooling 25 DEG C/s, coiling temperature 590 DEG C, warehouse-in slow cooling experimental result yield strength: 340MPa after 24 hours, tensile strength: 450MPa, elongation: 32.5%, clod wash: D=0 is qualified.End properties meets the requirement of 380MPa rank Wheel Steel completely.
Claims (7)
1. produce a production method for 380MPa rank wheel-use steel material, it is characterized in that, described technical process is as follows: steel billet is through heating of plate blank, high-pressure water descaling, roughing rolling, Coil Box is curling, finish rolling rolling, section cooling, crimping machine coiling process obtains 380MPa rank wheel-use steel material; The mass percent of described steel billet chemical composition is: C:0.06 ~ 0.10%, Si :≤0.10%, Mn:0.80 ~ 1.10%, P :≤0.020%, S :≤0.010%, Ti:0.010 ~ 0.030%, Als:0.015 ~ 0.050%, and all the other are Fe and inevitable impurity.
2. a kind of production method of producing 380MPa rank wheel-use steel material according to claim 1, is characterized in that, in described heating of plate blank operation, tapping temperature is 1180-1220 DEG C, heat-up time 140-200min.
3. a kind of production method of producing 380MPa rank wheel-use steel material according to claim 1, is characterized in that, described roughing rolling, adopts 5 ~ 7 passes, ensures intermediate blank temperature 1000-1040 DEG C, workpiece thickness 32-51mm.
4. a kind of production method of producing 380MPa rank wheel-use steel material according to claim 1, is characterized in that, described finish rolling rolling process: intermediate blank is through 7 rolling mill rollings, and finishing temperature is 860-890 DEG C.
5. a kind of production method of producing 380MPa rank wheel-use steel material according to claim 1, is characterized in that, described Coil Box curling process: Coil Box coiling temperature 980-1040 DEG C.
6. a kind of production method of producing 380MPa rank wheel-use steel material according to claim 1, is characterized in that, described section cooling operation, rate of cooling 25-30 DEG C/s.
7. a kind of production method of producing 380MPa rank wheel-use steel material according to claim 1, is characterized in that, described crimping machine coiling process, and temperature is 550-600 DEG C.
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| CN201510352586.2A CN105088070A (en) | 2015-06-24 | 2015-06-24 | Method for producing 380MPa-grade wheel steel |
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| CN201510352586.2A CN105088070A (en) | 2015-06-24 | 2015-06-24 | Method for producing 380MPa-grade wheel steel |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109112401A (en) * | 2018-08-31 | 2019-01-01 | 唐山钢铁集团有限责任公司 | A kind of 380MPa grades of titaniferous rim for automobile wheel steel band and its production method |
| CN111057951A (en) * | 2019-12-31 | 2020-04-24 | 河钢股份有限公司承德分公司 | 380 MPa-grade hot-rolled pickled plate for automobile wheel steel and production method thereof |
| CN112522488A (en) * | 2020-11-18 | 2021-03-19 | 浙江屹立金属材料有限公司 | Manufacturing process of steel coil |
| CN114574771A (en) * | 2022-03-04 | 2022-06-03 | 武安市裕华钢铁有限公司 | High-elongation-flange-performance and fatigue-resistant special steel for wheels and production process |
| CN114959445A (en) * | 2022-04-01 | 2022-08-30 | 宁波钢铁有限公司 | Steel for anti-transverse-fracture easy-welding rim and production method thereof |
| CN116240466A (en) * | 2023-03-21 | 2023-06-09 | 唐山钢铁集团有限责任公司 | Wheel steel and production method thereof |
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| JP2002180188A (en) * | 2000-12-07 | 2002-06-26 | Nippon Steel Corp | High strength hot rolled steel sheet having excellent hole expandability and ductility and its production method |
| JP2003247045A (en) * | 2001-10-03 | 2003-09-05 | Kobe Steel Ltd | Dual-phase steel sheet having excellent stretch flange formability and production method thereof |
| CN101736194A (en) * | 2008-11-19 | 2010-06-16 | 攀钢集团研究院有限公司 | Wheel steel and preparation method as well as wheel thereof |
| CN101812637A (en) * | 2009-02-19 | 2010-08-25 | 上海梅山钢铁股份有限公司 | High-strength high-tenacity steel used for automobile wheels and production method thereof |
| CN102146549A (en) * | 2010-02-08 | 2011-08-10 | 鞍钢股份有限公司 | Method for producing steel for LQ380G wheels |
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2015
- 2015-06-24 CN CN201510352586.2A patent/CN105088070A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002180188A (en) * | 2000-12-07 | 2002-06-26 | Nippon Steel Corp | High strength hot rolled steel sheet having excellent hole expandability and ductility and its production method |
| JP2003247045A (en) * | 2001-10-03 | 2003-09-05 | Kobe Steel Ltd | Dual-phase steel sheet having excellent stretch flange formability and production method thereof |
| CN101736194A (en) * | 2008-11-19 | 2010-06-16 | 攀钢集团研究院有限公司 | Wheel steel and preparation method as well as wheel thereof |
| CN101812637A (en) * | 2009-02-19 | 2010-08-25 | 上海梅山钢铁股份有限公司 | High-strength high-tenacity steel used for automobile wheels and production method thereof |
| CN102146549A (en) * | 2010-02-08 | 2011-08-10 | 鞍钢股份有限公司 | Method for producing steel for LQ380G wheels |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109112401A (en) * | 2018-08-31 | 2019-01-01 | 唐山钢铁集团有限责任公司 | A kind of 380MPa grades of titaniferous rim for automobile wheel steel band and its production method |
| CN109112401B (en) * | 2018-08-31 | 2020-08-04 | 唐山钢铁集团有限责任公司 | Steel strip for 380 MPa-grade titanium-containing wheel rim and production method thereof |
| CN111057951A (en) * | 2019-12-31 | 2020-04-24 | 河钢股份有限公司承德分公司 | 380 MPa-grade hot-rolled pickled plate for automobile wheel steel and production method thereof |
| CN112522488A (en) * | 2020-11-18 | 2021-03-19 | 浙江屹立金属材料有限公司 | Manufacturing process of steel coil |
| CN114574771A (en) * | 2022-03-04 | 2022-06-03 | 武安市裕华钢铁有限公司 | High-elongation-flange-performance and fatigue-resistant special steel for wheels and production process |
| CN114959445A (en) * | 2022-04-01 | 2022-08-30 | 宁波钢铁有限公司 | Steel for anti-transverse-fracture easy-welding rim and production method thereof |
| CN116240466A (en) * | 2023-03-21 | 2023-06-09 | 唐山钢铁集团有限责任公司 | Wheel steel and production method thereof |
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Application publication date: 20151125 |