CN202226904U - Production equipment for hot-rolling steel for automobile wheel steel ring - Google Patents
Production equipment for hot-rolling steel for automobile wheel steel ring Download PDFInfo
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- CN202226904U CN202226904U CN2011203347877U CN201120334787U CN202226904U CN 202226904 U CN202226904 U CN 202226904U CN 2011203347877 U CN2011203347877 U CN 2011203347877U CN 201120334787 U CN201120334787 U CN 201120334787U CN 202226904 U CN202226904 U CN 202226904U
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Abstract
The utility model provides production equipment for hot-rolling steel for an automobile wheel steel ring. The production equipment comprises an oxygen top and bottom combined blown revolving furnace for smelting molten steel, external refining equipment, a slab mold continuous caster, a hot rolling machine set and a stepping heating furnace, wherein the external refining equipment is arranged downstream the oxygen top and bottom combined blown revolving furnace, and conducts refining process on molten steel form the oxygen top and bottom combined blown revolving furnace; the slab mold continuous caster is arranged downstream the external refining equipment, and is used for casting molten steel processed by the external refining equipment into slab molds; the hot rolling machine set is arranged downstream the slab mold continuous caster, and is used for making the cast slab molds into steel plates; the stepping heating furnace is arranged downstream the hot rolling machine set, and is used for heating the steel plates; the external refining equipment comprises an LF (low frequency) refining furnace and a Ca-Fe feeding device; and the Ca-Fe feeding device is used for feeding Ca-Fe to the LF refining furnace and is connected with the feeding port of the LF refining furnace. Therefore, the production equipment can meet the requirements on cold processing formation of hot-rolling steel plate of the automobile wheel steel ring.
Description
Technical field
The utility model relates to and is used for the production unit of automotive wheel steel ring with HRS.
Background technology
Along with the fast development of Chinese national economy, the demand of automobile constantly increases, and according to the data introduction, the throughput of China's automobile in 2010 reaches 1,800 ten thousand, and meanwhile, automotive industry is also increasing to the demand of vehicle structure steel.The past automaker is when making the automotive wheel steel ring; The structure iron of selecting for use is Q195, Q235, SS400 steel etc. mostly, because serious cracking phenomena often appears in this type steel in the cold deformation process of complicacy, causes material use efficiency not high; Have a strong impact on the quality and the good looking appearance of car body; So manufacturers is not able to adopt the hot stamping distortion,, but also bring the increase of processing apparatus (process furnace) and the increase of energy consumption simultaneously with raising material use efficiency and quality product.Therefore be badly in need of a kind of alternate novel material, solved the mass defect that above-mentioned steel grade exists, satisfy the requirements at the higher level that the automobile making material is proposed.
The utility model content
To the correlation technique problem of prior art, the purpose of the utility model is to provide the production unit of a kind of automotive wheel steel ring with HRS, to satisfy the automotive wheel steel ring with the needs of hot-rolled steel sheet to cold machine-shaping.
For realizing above-mentioned purpose, on the one hand, the utility model provides the production unit of a kind of automotive wheel steel ring with HRS, comprising: the oxygen top and bottom combined blown converter that is used for smelting molten steel; Be located at external refining equipment oxygen top and bottom combined blown converter downstream, that the molten steel that comes from the oxygen top and bottom combined blown converter carried out refining treatment; Be located at the slab caster external refining equipment downstream, that the molten steel after the external refining equipment refining treatment cast slab; Be located at the slab rolling slab caster downstream, that will cast and become the hot continuous rolling unit of steel plate; And be located at walking beam furnace hot continuous rolling unit downstream, that the steel plate that is rolled into is heated; External refining equipment comprises refining furnace (for example being the LF refining furnace), and in refining furnace, feeds calcium calcium iron wire feeding unit iron wire and that be connected with the feeding mouth of refining furnace.
Preferably, this production unit also comprises the desulfurizing iron equipment that the molten iron that will add in the oxygen top and bottom combined blown converter is carried out desulfurization, and desulfurizing iron equipment is arranged on the upper reaches of oxygen top and bottom combined blown converter.
Preferably, slab caster comprises that the pulling rate with slab is controlled to be the slab pulling rate gear of 1.15 ± 0.3m/min.
Preferably, slab caster comprises that also temperature with middle bag is controlled at the middle bag temperature-control device in 1545 ± 30 ℃ the scope.
Preferably, external refining equipment also comprises and is located at vacuum refining furnace (for example being the RH vacuum refining furnace) the refining furnace downstream, that the molten steel after the LF refining furnace is handled carried out dehydrogenation and secondary deoxidation.
Preferably, this production unit also comprise be arranged on the walking beam furnace downstream and the steel plate that comes out from walking beam furnace carried out laminar flow refrigerative refrigerating unit.
On the other hand; The utility model provides a kind of automotive wheel steel ring to use HRS, and the chemical ingredients of HRS comprises by weight percentage: C:0.06～0.12%, Si :≤0.10%, Mn:0.30～0.70%, P: S≤0.030%: Al:0.010～0.060%≤0.020%.
Again on the one hand; The utility model also provides a kind of HRS production technique; Comprise: to satisfying of smelt the obtaining molten steel that the above-mentioned chemical ingredients of the utility model requires carry out LF external refining → sheet billet continuous casting → walking beam furnace heating → 2032mm hot continuous rolling unit rolling → laminar flow cools off → batches → check → put in storage → deliver, wherein, the molten steel that satisfies above-mentioned chemical ingredients requirement is in 150 tons of oxygen top and bottom combined blown converters, to carry out the converter smelting acquisition; In converter steelmaking process: the molten iron that pack into (1) is 132～140 tons; The steel scrap of packing into is 20 tons, and desulfurizing iron is handled fed to boiler, goes into stove molten iron S weight percent content≤0.005%; (2) when slag making: basicity R:3.0～3.5 of control slag, and by weight percentage the time, adopt the double slag process slag making in the molten iron under the situation of Si>=1.0%, otherwise adopt the single slag process slag making; (3) when carrying out terminal point when control: when satisfying following condition, reach the tapping requirement, C in the molten steel≤0.06%, P≤0.020% by weight percentage, wherein, tapping temperature is controlled at 1680 ± 40 ℃; (4) when tap, during the operation of deoxidation and alloying: adopt two pushing off the slag during tapping, tapping time>=200s; In tapping process, add the reductor that comprises ferro-aluminum; When adding reductor, add required alloy when carrying out said alloying control; C:0.07%～0.09%, Si in the molten steel when making by weight percentage :≤0.05%, Mn:0.30%～0.45%, Als:>=0.015%, in LF external refining process: slag control is carried out in (1): TFe＜1.0%, CaO:43%～48%, MgO:6%～8%, SiO in the slag when making by weight percentage
2: Al 9%～13%,
2O
3: 20%～24%, and basicity R:3.0～4.5 of control slag; (2) after slag making, carry out the molten steel composition fine setting; (3) behind the fine setting molten steel composition, carrying out calcium handles: every stove is fed 400～600m calcium iron wire, and the feeding rate-controlling is at 3.5～4.0m/s; (4) after calcium is handled, guarantee molten steel soft blow argon time＞8min, add ladle covering agent before the molten steel departures, with the protection molten steel, and in carrying out said sheet billet continuous casting process: use crack slab covering slag; Cold mode cracked when preventing the slab cast a little less than continuous casting secondary cooling system adopted; Middle bag temperature is controlled at 1545 ± 30 ℃, and pulling rate is controlled at 1.15 ± 0.3m/min.
Preferably, sheet billet continuous casting adopts the whole process protection casting process.
Preferably, when rolling, roughing extreme trace time temperature is controlled at 1080 ± 30 ℃, finish rolling temperature out and is controlled at 880 ± 25 ℃; When laminar flow cooled off, laminar flow refrigerative mode was that leading portion is cold soon, when thickness of strips is 7.0～11.0mm, the laminar flow temperature out was controlled at 610 ± 20 ℃～630 ± 20 ℃; The steel band that batches the back acquisition has uniform ferrite crystal grain, and the grain fineness number of said ferrite crystal grain is 9～10 grades.
Preferably, HRS is applicable to cold machine-shaping.
Than prior art, the beneficial effect of the utility model is:
(1) owing to comprise the LF refining furnace, and in the LF refining furnace calcium iron wire feeding unit of feeding calcium iron wire, make that therefore the inclusion content of steel of being produced reduces significantly;
(2) sheet billet continuous casting adopts crack covering slag and two suitable cold water distribution technologies, has reduced the generation of crackle of steel billet effectively;
(3) through appropriate Composition Control and suitable rolling technology, improve steel plate toughness and plasticity index greatly;
(4) user uses the HRS of the utility model to replace former conventional steel plates (Q235 etc.), can save furnace apparatus, directly is used for cold stamping and is shaped; And the user can save the input of process furnace, reduces energy total flow significantly.
(5) user uses the HRS of the utility model, and the cracking rate of the cold shaping course of processing satisfies its request for utilization less than 0.4%.
Description of drawings
Fig. 1 is the production unit of the automotive wheel steel ring of the utility model with HRS;
Embodiment
As shown in Figure 1, the automotive wheel steel ring of the utility model comprises with the production unit of HRS: the oxygen top and bottom combined blown converter 1 that is used for smelting molten steel; Be located at the external refining equipment 3 in oxygen top and bottom combined blown converter 1 downstream, in order to the molten steel that comes from oxygen top and bottom combined blown converter 1 is carried out refining treatment; Be located at the slab caster 5 in external refining equipment 3 downstream, in order to the molten steel after external refining equipment 3 refining treatment is cast slab; Be located at the hot continuous rolling unit 7 in slab caster 5 downstream, become steel plate in order to the slab rolling that will cast; Be located at the walking beam furnace 8 in hot continuous rolling unit 7 downstream, the steel plate that is rolled into is heated.Wherein, external refining equipment 3 comprises: LF refining furnace 33, calcium iron wire feeding unit 31, calcium iron wire feeding unit 31 are connected with the feeding mouth of LF refining furnace 3 with feeding calcium iron wire in LF refining furnace 33.
Fig. 1 also illustrates, and the production unit of the utility model also comprises the desulfurizing iron equipment 9 that the molten iron that will add in the oxygen top and bottom combined blown converter 1 is carried out desulfurization, and desulfurizing iron equipment 9 is located at the upper reaches of oxygen top and bottom combined blown converter 1; Slab caster 5 comprises: the pulling rate of slab is controlled to be the slab pulling rate gear 51 of 1.15 ± 0.3m/min, and the temperature of middle bag is controlled at the middle bag temperature-control device 53 in 1545 ± 30 ℃ the scope; External refining equipment 3 also comprises the RH vacuum refining furnace 35 that is located at LF refining furnace 33 downstream, in order to the molten steel after handling through LF refining furnace 33 is carried out dehydrogenation and secondary deoxidation.In addition, the production unit of the utility model also is provided with the refrigerating unit (not shown) in walking beam furnace 8 downstream, in order to the steel plate that comes out from walking beam furnace 8 is carried out the laminar flow cooling.Should be appreciated that the LF refining furnace can use other refining furnace to replace in the utility model, the RH vacuum refining furnace can use other vacuum refining furnace to replace.
Following table 1 shows the included chemical ingredients by weight percentage of HRS of the utility model; Form 2 has been listed the mechanical property that HRS reached of the utility model.Referring to table 1; The utility model provides a kind of automotive wheel steel ring to use HRS, and its chemical ingredients comprises by weight percentage: C:0.06～0.12%, Si :≤0.10%, Mn:0.30～0.70%, P: S≤0.030%: Al:0.010～0.060%≤0.020%.
Table 1:
Referring to form 2, the full following condition of the mechanical property of the utility model HRS design, that is, and ys: >=215MPa; Tensile strength: 370～500MPa elongation: >=31%; 1800 clod washes, b=25mm:d=1.5a.
Table 2:
On the other hand; The utility model also provides the production technique of a kind of automotive wheel steel ring with HRS, and its operational path is: to satisfying of smelt the obtaining molten steel that above-mentioned chemical ingredients requires carry out LF external refining → sheet billet continuous casting → walking beam furnace heating → 2032mm hot continuous rolling unit rolling → laminar flow cools off → batches → check → put in storage → deliver.
The molten steel that satisfies above-mentioned chemical ingredients requirement carries out converter smelting and obtains in 150 tons of oxygen top and bottom combined blown converters; In converter steelmaking process: pack molten iron and steel scrap in the converter (1); Wherein, the molten iron of packing into is 132～140 tons, and the steel scrap of packing into is 20 tons; Desulfurizing iron is handled fed to boiler, goes into stove molten iron S weight percent content≤0.005%; (2) during slag making, basicity R:3.0～3.5 of control slag, and by weight percentage the time, adopt the double slag process slag making in the molten iron under the situation of Si>=1.0%, otherwise adopt the single slag process slag making; (3) when carrying out terminal point when control: when satisfying following condition, reach the tapping requirement, C in the molten steel≤0.06%, P≤0.020% by weight percentage, wherein, tapping temperature is controlled at 1680 ± 40 ℃; (4) when tap, during the operation of deoxidation and alloying: adopt two pushing off the slag during tapping, tapping time>=200s; In tapping process, add the reductor that comprises ferro-aluminum; When adding reductor, add required alloy when carrying out said alloying control, C:0.07%～0.09%, Si in the molten steel when making by weight percentage :≤0.05%, aluminium (Als) is dissolved in Mn:0.30%～0.45%, acid:>=0.015%.Converter smelting also relates to Argon system behind the stove, strict control argon blowing time and argon flow amount.
The utility model adopts the smelting technology of low silicon (Si) when smelting.In converter steelmaking process, for obtaining ladle top slag effect preferably, the measure of taking has: tapping goes to ladle to add a certain amount of (1200～1500kg) preparatory molten slag; Tapping process adds a certain amount of (800～1200kg) lime; Add the 150kg refining slag behind the stove again.
In LF external refining process: slag control is carried out in (1): TFe＜1.0%, CaO:43%～48%, MgO:6%～8%, SiO in the slag when making by weight percentage
2: Al 9%～13%,
2O
3: 20%～24%, and basicity R:3.0～4.5 of control slag; (2) after slag making, carry out the molten steel composition fine setting; (3) behind the fine setting molten steel composition, carrying out calcium handles: every stove is fed 400～600m calcium iron wire, and the feeding rate-controlling is at 3.5～4.0m/s; (4) after calcium is handled, guarantee molten steel soft blow argon time＞8min, add ladle covering agent before the molten steel departures, with the protection molten steel.
In carrying out said sheet billet continuous casting process: use crack slab covering slag; Cold mode cracked when preventing the slab cast a little less than continuous casting secondary cooling system adopted; Middle bag temperature is controlled at 1545 ± 30 ℃, and pulling rate is controlled at 1.15 ± 0.3m/min, and wherein sheet billet continuous casting adopts the whole process protection casting process.
When rolling, roughing extreme trace time temperature is controlled at 1080 ± 30 ℃, finish rolling temperature out and is controlled at 880 ± 25 ℃.
When laminar flow cooled off, laminar flow refrigerative mode was that leading portion is cold soon, when thickness of strips is 7.0～11.0mm, the laminar flow temperature out was controlled at 610 ± 20 ℃～630 ± 20 ℃.
The steel band that batches the back acquisition has uniform ferrite crystal grain, and the grain fineness number of said ferrite crystal grain is 9～10 grades.The HRS of the utility model is applicable to cold machine-shaping.
To sum up; Owing to comprise refining furnace (especially LF refining furnace); And the calcium iron wire feeding unit that in refining furnace, feeds the calcium iron wire, make that therefore the inclusion content of steel of being produced reduces significantly, promptly can introduce LF refining and calcium treatment process by means of this production unit; Sheet billet continuous casting adopts crack covering slag and two suitable cold water distribution technologies, has reduced the generation of crackle of steel billet effectively; Through appropriate Composition Control and suitable rolling technology, improve steel plate toughness and plasticity index greatly; The user uses the HRS of the utility model to replace the for example conventional steel plates of Q235, can save furnace apparatus, directly is used for cold stamping and is shaped; And the user can save the input of process furnace, reduces energy total flow significantly; The user uses the HRS of the utility model, and the cracking rate of the cold shaping course of processing satisfies its request for utilization less than 0.4%.
The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (6)
1. an automotive wheel steel ring is characterized in that with the production unit of HRS, comprising:
The oxygen top and bottom combined blown converter that is used for smelting molten steel;
Be located at external refining equipment said oxygen top and bottom combined blown converter downstream, that the molten steel that comes from said oxygen top and bottom combined blown converter carried out refining treatment;
Be located at slab caster said external refining equipment downstream, that the molten steel after the said external refining equipment refining treatment cast slab;
Be located at slab rolling said slab caster downstream, that will cast and become the hot continuous rolling unit of steel plate; And
Be located at walking beam furnace said hot continuous rolling unit downstream, that the steel plate that is rolled into is heated,
Wherein, said external refining equipment comprises refining furnace, and in said refining furnace, feeds calcium calcium iron wire feeding unit iron wire and that be connected with the feeding mouth of said refining furnace.
2. automotive wheel steel ring according to claim 1 is with the production unit of HRS; It is characterized in that; Also comprise the desulfurizing iron equipment that the molten iron that will add in the said oxygen top and bottom combined blown converter is carried out desulfurization; Wherein, said desulfurizing iron equipment is arranged on the upper reaches of said oxygen top and bottom combined blown converter.
3. automotive wheel steel ring according to claim 2 is characterized in that with the production unit of HRS said slab caster comprises that the pulling rate with slab is controlled to be the slab pulling rate gear of 1.15 ± 0.3m/min.
4. automotive wheel steel ring according to claim 3 is characterized in that with the production unit of HRS, and said slab caster comprises that also the temperature with middle bag is controlled at the middle bag temperature-control device in 1545 ± 30 ℃ the scope.
According to each described automotive wheel steel ring among the claim 1-4 with the production unit of HRS; It is characterized in that said external refining equipment also comprises and is located at vacuum refining furnace said refining furnace downstream, that the molten steel after handling through said refining furnace is carried out dehydrogenation and secondary deoxidation.
6. automotive wheel steel ring according to claim 5 is characterized in that with the production unit of HRS, also comprise be arranged on said walking beam furnace downstream, the steel plate that comes out from walking beam furnace is carried out laminar flow refrigerative refrigerating unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203347877U CN202226904U (en) | 2011-09-07 | 2011-09-07 | Production equipment for hot-rolling steel for automobile wheel steel ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203347877U CN202226904U (en) | 2011-09-07 | 2011-09-07 | Production equipment for hot-rolling steel for automobile wheel steel ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202226904U true CN202226904U (en) | 2012-05-23 |
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ID=46077502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203347877U Expired - Fee Related CN202226904U (en) | 2011-09-07 | 2011-09-07 | Production equipment for hot-rolling steel for automobile wheel steel ring |
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| Country | Link |
|---|---|
| CN (1) | CN202226904U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108118256A (en) * | 2017-12-29 | 2018-06-05 | 吉林建龙钢铁有限责任公司 | A kind of wheel coils of hot-rolled steel and preparation method thereof |
| CN115821150A (en) * | 2022-12-15 | 2023-03-21 | 盐城市联鑫钢铁有限公司 | Control method for avoiding H08A bubble defect of welding rod steel |
-
2011
- 2011-09-07 CN CN2011203347877U patent/CN202226904U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108118256A (en) * | 2017-12-29 | 2018-06-05 | 吉林建龙钢铁有限责任公司 | A kind of wheel coils of hot-rolled steel and preparation method thereof |
| CN108118256B (en) * | 2017-12-29 | 2020-02-21 | 吉林建龙钢铁有限责任公司 | Preparation method of hot-rolled steel coil for wheel without LF external refining |
| CN115821150A (en) * | 2022-12-15 | 2023-03-21 | 盐城市联鑫钢铁有限公司 | Control method for avoiding H08A bubble defect of welding rod steel |
| CN115821150B (en) * | 2022-12-15 | 2024-04-09 | 盐城市联鑫钢铁有限公司 | Control method for avoiding bubble defect of welding rod steel H08A |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120523 Termination date: 20160907 |
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| CF01 | Termination of patent right due to non-payment of annual fee |