CN108004474A - A kind of punching press acid-cleaning plate（Volume）And manufacture method - Google Patents
A kind of punching press acid-cleaning plate（Volume）And manufacture method Download PDFInfo
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- CN108004474A CN108004474A CN201711393932.7A CN201711393932A CN108004474A CN 108004474 A CN108004474 A CN 108004474A CN 201711393932 A CN201711393932 A CN 201711393932A CN 108004474 A CN108004474 A CN 108004474A
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- Prior art keywords
- acid
- rolling
- volume
- cleaning plate
- punching press
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
- B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
-
- 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
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a kind of punching press acid-cleaning plate (volume) and manufacture method.Using the composition design system that microalloy Ti is added on the basis of micro- C, and the characteristics of using completely without head bar strip continuous casting and rolling flow path heavy reduction rate, by reducing rolling pass, finish rolling is changed into four racks from five racks, to improve finishing temperature, ensure product structural homogenity and performance, make it have good performance and can be applied to the industries such as compressor, automobile structure.And directly rolled without soaking stove heat completely without head continuous casting and rolling technique of sheet bar flow strand, the technological process of production is short, saves the energy, reduces CO2 emission, belongs to low energy consumption green steel and iron manufacturing technique.
Description
Technical field
The present invention relates to the composition design and manufacture method technical field of punching press acid-cleaning plate (volume), more particularly to one kind
Punching press acid-cleaning plate (volume) and manufacture method.
Background technology
With expanding economy, the industry such as automobile and household electrical appliances also rapid growth, client in order to lift the product quality of itself,
In inside in addition to reducing cost, there is higher requirement to raw material surface quality quality, be drawn into greater need for moderately good
Type performance, this demand driving the developing rapidly of hot rolling acid-cleaning plate.Hot rolling acid-cleaning plate (volume) is using hot rolled coil as raw material, in pickling
On unit, hot rolling acid-cleaning plate is obtained after pickling removes the processing of the processes such as belt steel surface iron scale, trimming, smooth and oiling
(volume).Its products characteristics is as follows：1st, good surface quality：Compared with hot rolled coil, scale on surface is eliminated, easy to weld
Connect, oiling and spray are crossed；2nd, good surface smoothness and appearance；3rd, higher dimensional accuracy (with common hot rolled coil ratio)；4th, compared with
Low cost (on the premise of surface quality requirement is ensured, compared with cold plate)；5 fill up cold plate vacancy：Make up cold rolling hardly possible
With the think gauge product (more than 2.0mm acid-cleaning plates) of production.
In view of middle product of the hot rolling acid-cleaning plate between hot rolled plate and cold-reduced sheet, since it not only has the power of hot rolled plate
Learn performance, and surface quality is close to cold-reduced sheet, thus now to hot rolling acid-cleaning plate (volume) (especially high-end punching press pickling
Plate) demand it is growing day by day.
Although it is at present high-strength hot rolled sheet completely without head thin slab continuous casting and rolling output strip line product orientation without a head, with heat
Dai Leng, at the same also can a large amount of acid-cleaning plates of output (>=2.0mm), but existing common acid-cleaning plate elongation percentage deficiency (average value deficiency
40%) or performance inconsistency is larger, can not meet punching press industry (such as compressor, automobile structure) demand.With reference to completely without thin
The characteristics of slab continuous casting rolling product strength is high, in exploitation punch level mild steel, there is also certain difficulty.
In the prior art normal five machine of finish rolling is used completely without head bar strip continuous casting and rolling flow path acid-cleaning plate (volume) SPHC products
Frame produce, finishing temperature is relatively low (800~850 DEG C), in two-phase section roll, tissue mixed crystal it is serious, cause elongation percentage fluctuation compared with
(more than 32%, average is less than 40%), and product aging performance is larger (being free of Ti alloys), properties of product when client uses greatly
Deteriorate (yield strength increases, and elongation percentage further reduces).
The content of the invention
The present invention provides a kind of punching press acid-cleaning plate (volume) and manufacture method aiming at above-mentioned defect.Using
The composition design system of microalloy Ti is added on the basis of micro- C, and using completely without the big pressure of head bar strip continuous casting and rolling flow path
The characteristics of rate, by reducing rolling pass (finish rolling is changed into four racks from five racks), to improve finishing temperature, ensure product tissue
Uniformity and performance, make it have good performance and can be applied to the industries such as compressor, automobile structure.And completely without head thin plate
Continuous-casting tandem-rolling technological process strand is directly rolled without soaking stove heat, and the technological process of production is short, saves the energy, is reduced
CO2 emission, belongs to low energy consumption green steel and iron manufacturing process regime.
The technical scheme is that a kind of punching press is with acid-cleaning plate (volume), it is characterised in that including by weight percentage
Following component：C 0.02-0.03%, Si 0.028-0.034%, Mn 0.08-0.12%, P≤0.017%, S≤0.003%,
Alt 0.025-0.030%, Ti 0.010-0.015%, N≤0.005%.
A kind of punching press is with acid-cleaning plate (volume), it is preferred that including following component by weight percentage：C
0.025%, Si 0.031%, Mn 0.10%, P≤0.012%, S≤0.002%, Alt 0.030%, Ti 0.015%, N≤
0.004%.
C：Carbon can be dissolved in steel and form solid solution, can play solution strengthening effect, but with carbon content
Increase, plasticity and welding performance reduce；On the contrary, the plasticity of steel can be improved by reducing carbon content.To obtain the Asia of more high-elongation
Eutectoid steel.C content control in the present invention is 0.02~0.03%.
Ti：Titanium is strong carbonitride-forming elements in steel, and in continuous casting and cooling stage, TiN and Ti occurs4C2S2Particle
Liquid separates out and solid-state separates out；In rolling sequence, deformation-induced precipitations of the TiC in austenite occurs；Cooling down and batching rank
The same precipitation that TiC occurs of section.The addition of Ti contents can effectively suppress the timeliness change of steel.The control of Ti contents exists in the present invention
0.015~0.020%.
Al：Aluminium is common deoxidier in steel, and a small amount of aluminium is added in steel, can crystal grain thinning, improve impact plasticity.At this
Al content control is 0.025~0.030% in invention.
A kind of punching press manufacture method of acid-cleaning plate (volume), comprises the following steps：
(1) continuous casting process：The middle bag degree of superheat, company pour heat and control in 15-25 DEG C of scope, open and pour the control of the first stove in 20-
30℃；Liquidus temperature is 1532 DEG C；The requirement of liquid level fluctuation of crystallizer standard deviation：≤1.5mm；The section temperature difference controls：≤40℃；
(2) roughing technique
Roughing workpiece thickness controls, and 1mm is thinned compared with original thickness in roughing workpiece thickness after improvement；Temperature control, entrance
The section temperature difference≤40 DEG C；
(3) IH heating process；
IH heating-up temperatures carry out appropriate temperature scaling factor with finishing temperature, and it is bent to change IH induction heaters heating power
Line, uniform each modular power, reduces kelvin effect.
(4) finish-rolling process
Thickness control, redistributes rolling mill screwdown amount, and finish rolling has normal 5 rack rolling mode to be changed to 4 racks, F5 machines of skimming
Frame；
(5) layer is cold and coiling technique
Section cooling strategy, has leading portion cooling to be changed to back segment cooling, and layer cold outlet temperature is ensures that crystal grain fills after finish rolling
Point grow up and the precipitation of soluble solids, further improve toughness of products and reduce timeliness；
(6) the flat technique of acid
Stock roll is reached the standard grade temperature≤45 DEG C, it is ensured that stress fully discharges；Descaling mill elongation percentage 0.8%, planisher elongation percentage
0.8%, withdrawal straightening machine elongation percentage 0.4%.
In step (1), the second stove pulling rate stabilization is in 5.5m/min.
In step (2), strand directly carries out hot rolling without soaking stove heat, 990-1000 DEG C of hot rolling roughing inlet temperature,
Roughing exports 980-1000 DEG C.
In step (3), 1100~1120 DEG C of IH sensing heatings heater outlet temperature (adjusts) depending on iron scale situation.
Finish rolling is changed to 4 rolling mills (skim F5) by 5 rolling mills, and finishing temperature (F5 outlets) increases to after reducing by a passage
860~870 DEG C, actual finishing temperature (F4 outlets) is 870~890 DEG C, avoids two-phase section from rolling.
In step (5), 660~670 DEG C of coiling temperature.
In step (6), completely without head thin slab continuous casting and rolling roll rear hot rolling need slow cooling place 5~6 days, proof stress it is abundant
Release；
The control of each section of total acidity is in 190~200g/L, and pickling temperature control is at 70~85 DEG C, process section speed 100m/min
Following acid tank temperature is controlled by lower limit, and more than 250m/min acid tanks temperature is controlled by the upper limit.
Beneficial effects of the present invention are：Given birth to using completely without head thin slab continuous casting and rolling completely without head continuous casting and rolling technique of sheet bar
The punching press of production acid-cleaning plate (volume) SPHC-CY, compared to common acid-cleaning plate (volume) SPHC properties of product highers, cost lower (few one
Frame finishing mill), while, ton steel is raised the price 50 yuan/ton in SPHC substantially.Current batch application is in compressor industry, automobile knot
The industries such as component, as shown in Figure of description Fig. 3,4,5.The present invention is connected with completely without head thin slab continuous casting and rolling completely without head sheet billet
Punching press acid-cleaning plate (volume) SPHC-CY of continuous rolling process production is cast, the technological process of production is short, belongs to low energy consumption green manufacturing technique
Category, the composition design system of micro- C and microalloy Ti is used in composition design, under without annealing process, by varying rolling
Technique processed, obtains even tissue and function admirable product, solves common acid-cleaning plate (volume) SPHC-CY in some industry (compressions
Machine, automobile structure etc.) industry stamping cracking or ear phenomenon processed, while production cost is reduced, kind raise the price 50 yuan/
Ton, makes company obtain more high yield.
Through in January, 2017-half a year in June experiment, the product SPHC-CY elongation percentage produced using the present invention is significantly carried
High (improving more than 4%), and timeliness greatly reduces.As shown in Figure of description Fig. 1, product SPHC-CY produced by the invention
(both performances of contrast, SPHC-CY hot rollings elongation percentage prolong than SPHC high 4.2%, SPHC-CY cold rollings with common SPHC performance comparisons
Stretch rate than SPHC high 3.9%).
As shown in description of the invention attached drawing Fig. 2, be free of under product (alloy containing Ti) produced by the invention and same process
The contrast of Ti alloy properties (both performances of contrast, elongation percentage very little after the timeliness of product containing Ti；Dropped without elongation percentage after Ti product timeliness
It is low 4%).
The characteristics of present invention is based on completely without head bar strip continuous casting and rolling flow path, enters by adjusting component and modified technique aspect
Hand, develops punching press acid-cleaning plate (volume) SPHC-CY (elongation percentage >=42%), meets that the industries such as compressor, automobile structure are rushed
Pressure demand has simultaneously been completed batch and has been used, perfect completely without head bar strip continuous casting and rolling flow path product structure.
Figure of description：
Fig. 1 show SPHC-CY produced by the invention and routine SPHC performance comparison figures；
Fig. 2, which is shown under product produced by the invention (alloy containing Ti) and same process, is free of Ti alloy property comparison diagrams；
Fig. 3 show the freezer compressor housing lower shell photo of the production of the present invention, uses unit：Ten thousand precious compressions
Machine Co., Ltd (Qingdao), product specification：3.0*1250mm；
Fig. 4 show the freezer compressor housing lower shell photo of the production of the present invention, uses unit：China's meaning compression
Machine Co., Ltd (Jing Dezhen), product specification：3.0*1250mm；
Fig. 5 show the Dimensions Used in Shell of Refrigerator Compressor photo of the production of the present invention, uses unit：Jiangsu east shellfish is electromechanical
(Suqian), product specification：3.0*1250mm.
Embodiment：
For a better understanding of the present invention, below with instantiation come the technical solution that the present invention will be described in detail, but this
Invention is not limited thereto.
Embodiment 1
Table 1 show main technologic parameters and product mechanics inspection data
Table 1
Embodiment 2
Table 2 show the present embodiment main technologic parameters and product mechanics inspection data
Table 2
Existing five racks rolling mill practice (including composition design) and four rack rolling mill practice comparative example data are as shown in table 3：
Table 3
Claims (9)
1. a kind of punching press is with acid-cleaning plate (volume), it is characterised in that including following component by weight percentage：C 0.02-
0.03%, Si 0.028-0.034%, Mn 0.08-0.12%, P≤0.017%, S≤0.003%, Alt 0.025-
0.030%, Ti 0.015-0.020%, N≤0.005%.
2. a kind of punching press according to claim 1 is with acid-cleaning plate (volume), it is characterised in that including by weight percentage with
Lower component：C 0.025%, Si 0.031%, Mn 0.10%, P≤0.012%, S≤0.002%, Alt 0.030%, Ti
0.015%, N≤0.004%.
3. the manufacture method of a kind of punching press acid-cleaning plate (volume) as claimed in claim 1, it is characterised in that including following step
Suddenly：
(1) continuous casting process：The middle bag degree of superheat, company pour heat and control in 15-25 DEG C of scope, open and pour the control of the first stove at 20-30 DEG C；
Liquidus temperature is 1532 DEG C；The requirement of liquid level fluctuation of crystallizer standard deviation：≤1.5mm；The section temperature difference controls：≤40℃；
(2) roughing technique
Roughing workpiece thickness controls, and 1mm is thinned compared with original thickness in roughing workpiece thickness after improvement；Temperature control, inlet section
The temperature difference≤40 DEG C；
(3) IH heating process；
(4) finish-rolling process
Thickness control, redistributes rolling mill screwdown amount, and finish rolling has normal 5 rack rolling mode to be changed to 4 racks, F5 racks of skimming；
(5) layer is cold and coiling technique
Section cooling strategy, has leading portion cooling to be changed to back segment cooling；
(6) the flat technique of acid
Stock roll is reached the standard grade temperature≤45 DEG C, it is ensured that stress fully discharges；Descaling mill elongation percentage 0.8%, planisher elongation percentage
0.8%, withdrawal straightening machine elongation percentage 0.4%.
A kind of 4. manufacture method of punching press acid-cleaning plate (volume) according to claim 3, it is characterised in that in step (1),
Second stove pulling rate stabilization is in 5.5m/min.
A kind of 5. manufacture method of punching press acid-cleaning plate (volume) according to claim 3, it is characterised in that in step (2),
Strand directly carries out hot rolling, 990-1000 DEG C of hot rolling roughing inlet temperature without soaking stove heat, and roughing exports 980-1000 DEG C.
A kind of 6. manufacture method of punching press acid-cleaning plate (volume) according to claim 3, it is characterised in that in step (3),
1100~1120 DEG C of IH sensing heatings heater outlet temperature.
A kind of 7. manufacture method of punching press acid-cleaning plate (volume) according to claim 3, it is characterised in that in step (4),
Actual finishing temperature is 870~890 DEG C.
A kind of 8. manufacture method of punching press acid-cleaning plate (volume) according to claim 3, it is characterised in that in step (5),
660~670 DEG C of coiling temperature.
A kind of 9. manufacture method of punching press acid-cleaning plate (volume) according to claim 3, it is characterised in that in step (6),
Rolling rear hot rolling completely without head thin slab continuous casting and rolling needs slow cooling to place 5~6 days, the abundant release of proof stress；
Each section of total acidity control is controlled below 70~85 DEG C, process section speed 100m/min in 190~200g/L, pickling temperature
Acid tank temperature is controlled by lower limit, and more than 250m/min acid tanks temperature is controlled by the upper limit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711393932.7A CN108004474A (en) | 2017-12-21 | 2017-12-21 | A kind of punching press acid-cleaning plate（Volume）And manufacture method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711393932.7A CN108004474A (en) | 2017-12-21 | 2017-12-21 | A kind of punching press acid-cleaning plate（Volume）And manufacture method |
Publications (1)
| Publication Number | Publication Date |
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| CN108004474A true CN108004474A (en) | 2018-05-08 |
Family
ID=62060299
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| CN201711393932.7A Withdrawn CN108004474A (en) | 2017-12-21 | 2017-12-21 | A kind of punching press acid-cleaning plate（Volume）And manufacture method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109055867A (en) * | 2018-08-30 | 2018-12-21 | 日照钢铁控股集团有限公司 | A method of producing tensile strength 540MPa high reaming heat zinc coating plate |
| CN112030058A (en) * | 2020-08-28 | 2020-12-04 | 广州大学 | Method for producing Ti microalloyed Q345B steel grade and Q345B steel grade by TMCP process |
| CN113042563A (en) * | 2021-03-17 | 2021-06-29 | 包头钢铁（集团）有限责任公司 | Manufacturing method of SPHE hot-rolled pickled plate for stamping |
| CN113996656A (en) * | 2021-10-30 | 2022-02-01 | 日照宝华新材料有限公司 | Iron scale control device and method for low-carbon low-silicon plate strip production line |
-
2017
- 2017-12-21 CN CN201711393932.7A patent/CN108004474A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109055867A (en) * | 2018-08-30 | 2018-12-21 | 日照钢铁控股集团有限公司 | A method of producing tensile strength 540MPa high reaming heat zinc coating plate |
| CN109055867B (en) * | 2018-08-30 | 2021-06-29 | 日照钢铁控股集团有限公司 | Method for producing high-hole-expansion hot-dip galvanized plate with tensile strength of 540MPa |
| CN112030058A (en) * | 2020-08-28 | 2020-12-04 | 广州大学 | Method for producing Ti microalloyed Q345B steel grade and Q345B steel grade by TMCP process |
| CN112030058B (en) * | 2020-08-28 | 2022-01-04 | 广州大学 | Method for producing Ti microalloyed Q345B steel grade and Q345B steel grade by TMCP process |
| CN113042563A (en) * | 2021-03-17 | 2021-06-29 | 包头钢铁（集团）有限责任公司 | Manufacturing method of SPHE hot-rolled pickled plate for stamping |
| CN113996656A (en) * | 2021-10-30 | 2022-02-01 | 日照宝华新材料有限公司 | Iron scale control device and method for low-carbon low-silicon plate strip production line |
| CN113996656B (en) * | 2021-10-30 | 2023-12-05 | 日照宝华新材料有限公司 | Oxidized iron scale control device and method for low-carbon low-silicon plate and strip production line |
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Application publication date: 20180508 |