CN104831166B - A kind of strip steel production method improving cylinder steel rim of a cup shape uniformity - Google Patents
A kind of strip steel production method improving cylinder steel rim of a cup shape uniformity Download PDFInfo
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Abstract
The present invention relates to a kind of strip steel production method improving cylinder steel rim of a cup shape uniformity, be used for solving in prior art closing in position shape defect defect after cylinder steel welding forming.Its continuous-cast blank heating-up temperature is 1160 DEG C 1240 DEG C, is incubated 40 min 60 min；Rolling process section cooling rate controlled is at 92.8 DEG C/s of 34.1 DEG C/s；Strip steel upper surface laminar flow cooling water inflow is 81% 95%(percentage by weight of lower surface), 0 120 meters of section cooling water yields of strip steel head are 70% 85%(percentage by weight of the normal water yield), 0 120 meters of cooling water inflows of tail part of band steel are 50% 75%(percentage by weight of the normal water yield), in the middle part of strip steel, the section cooling water yield is set to the normal water yield.The present invention makes cylinder steel band roll up logical volume uniformity of temperature profile, and crystal grain is grown up, phase transformation diversity reduces, the uniformity of rim of a cup shape after improve each mechanical property uniformity and processing.
Description
Technical field
The present invention relates to a kind of strip steel production method improving cylinder steel rim of a cup shape uniformity, belong to metallurgy strip rolling technical field.
Background technology
HP295 is the trade mark that cylinder steel product consumption is maximum, purposes is the widest, mainly for the manufacture of LP gas cylinder, seamless steel gas cylinder and the compressed natural gas used as vehicle fuel bottle etc. of family's 10kg, 15kg dress.Generally, cylinder steel is manufactured into bottle from strip steel raw material, and main production is: hot rolling raw steel winds off, open flat → stamping-out disk → disk punching press drawing is become half tank body → half tank body close up → closings in and unreefed half tank body are socketed and are welded into type → heat treatment → pressure-bearing and Leak Detection → packaging.The operation that in forming process, strip steel is deformed by external force has: stamping-out disk; drawing; the technical process that closing in etc. are crucial; in these three deformation process; closing in position shape defect phenomenon after cylinder steel welding forming often occurs; i.e. " rim of a cup is uneven " phenomenon, brings puzzlement greatly to cylinder steel product producer and users；Through analyzing, the every mechanical property of hot-strip is uneven and belt steel surface lower hardness is the main cause causing " rim of a cup is uneven ".
Summary of the invention
The technical problem to be solved is to provide a kind of strip steel production method improving cylinder steel rim of a cup shape uniformity, the belt steel product logical volume variations in temperature using this technique to produce is uniform, Austenite Grain Growth, phase transition process diversity are little, strip steel respectively extends to uniform when stretching or deep-draw, thus improve cylinder steel product rim of a cup shape uniformity, solve the defect in background technology.
The present invention solves that the technical scheme that above-mentioned technical problem is used is:
A kind of strip steel production method improving cylinder steel rim of a cup shape uniformity, comprises following processing step:
(1), steel smelting-continuous casting operation produces strand；
(2), strand heating process, eliminate strand thermograde；
(3), strand rolling process；
(4), strip coiling operation；
(5), smooth operation；
In described step (1), strand Ingredients Weight percentage composition is respectively as follows: C:0.14%-0.17%, Si :≤0.05%, Mn:0.8%-1.0%, P :≤0.015%, S :≤0.005%, Als:0.015%-0.035%, Ti:0.01%-0.02%；The type of cooling of described step (3) strand rolling is section cooling, and in described step (4), coiling temperature is 570 DEG C-630 DEG C, and its improvements are: described step (2) slab heating temperature is 1160 DEG C-1240 DEG C, is incubated 40 min-60 min；In described step (3) rolling process, laminar flow cooldown rate controls at 34.1 DEG C/s-92.8 DEG C/s.
Above-mentioned a kind of strip steel production method improving cylinder steel rim of a cup shape uniformity, in described step (3) rolling process, edge-masking one side stroke is (0-270) mm；The section cooling water yield is controlled as: strip steel upper surface laminar flow cooling water inflow is the 81%-95%(percentage by weight of lower surface), the strip steel head 0-120 rice section cooling water yield is the 70%-85%(percentage by weight of the normal water yield), tail part of band steel 0-120 rice cooling water inflow is the 50%-75%(percentage by weight of the normal water yield), in the middle part of strip steel, the section cooling water yield is set to the normal water yield；After reducing cooling water inflow, strip steel head 0-120 rice section cooling " water-cooled section " cooldown rate of different-thickness specification controls at 38 DEG C/s-64 DEG C/s, tail part of band steel 0-120 rice section cooling " water-cooled section " cooldown rate controls at 34.1 DEG C/s-55 DEG C/s, and strip steel normal position section cooling " water-cooled section " cooldown rate controls at 42 DEG C/s-92.8 DEG C/s.
Above-mentioned a kind of strip steel production method improving cylinder steel rim of a cup shape uniformity, in described step (3) rolling process, roughing final pass rolling temperature range is 1025 DEG C-1060 DEG C, finish rolling start rolling temperature scope is 964 DEG C-975 DEG C, avoids partial, re-crystallization warm area rolling between 978 DEG C-1023 DEG C.
Above-mentioned a kind of strip steel production method improving cylinder steel rim of a cup shape uniformity, in described step (5) smooth operation, entrance tension force controls as 60KN-180KN, outlet tension force controls to be 180KN-400KN, and depressing force controls to be 600KN-3600KN, and elongation control is 0.2%-1.5%.
Above-mentioned a kind of strip steel production method improving cylinder steel rim of a cup shape uniformity, in described step (3), the normal water yield of section cooling is strip steel upper surface cooling water inflow and lower surface cooling water inflow sum, scope 2000m3/h
-2680m3/h。
The present invention measures target steel grade dynamically continuous transition process first with hot modeling test machine and draws CCT curve, controls laminar flow cooling technology and strip steel microstructure Changing Pattern, obtains the uniform microstructure of logical volume, reach the purpose of mechanical property uniformity.Wherein in rolling process, need to avoid partial, re-crystallization warm area rolling between 978 DEG C-1023 DEG C, with the penalty avoiding mixed grain structure to bring；Section cooling speed uses reduction of speed refrigerating mode, cooldown rate is controlled at 34.1 DEG C/s-92.8 DEG C/s, and main purpose is to control even grain size on belt steel thickness direction, makes logical volume microstructure be evenly distributed and crystal particle dimension difference substantially reduces；Control to the strip steel different parts section cooling water yield makes strip steel logical volume variations in temperature uniform, and Austenite Grain Growth, phase transformation diversity are little；The increase of smooth operation can improve belt steel surface hardness and eliminate yield point elongation, makes steel plate receive when stretching or deep-draw each to uniform extension.
Beneficial effects of the present invention:
(1) belt steel temperature distributing homogeneity is very significantly improved, strip steel head 0-120 rice mean temperature and the difference scope 5 DEG C-17 DEG C of afterbody 0-120 rice mean temperature, by adjust the traversing displacement of edge sheltering device, make on strip steel horizontal same level line to fore side, 1/4th, heart portion, 3/4ths, driving side temperature difference scope 5 DEG C-15 DEG C.
(2) uniformity of strip steel microstructure is very significantly improved, strip steel for same thickness specification, 0 degree, 30 degree, 45 degree, 60 degree, 90 degree of five direction samples are taken along same width, surface location, heart portion position microstructure detection is carried out on thickness direction, testing result shows: hot-strip microstructure is based on ferrite (content 77%-93%) and pearlite (content 7%-23%), the nearly epi-position of strip steel puts grain size size range in 5.6 μm-12.9 μm, and band steel core portion position grain size range is in 5.9 μm-14.8 μm；Strip steel grain size is led to volume and is evenly distributed, and structure is consistent, occurs without mixed grain structure and segregation.
(3) uniformity of band steel mechanical property is very significantly improved, strip steel for same thickness specification, along same width, take 0 degree, 30 degree, 45 degree, 60 degree, 90 degree of five direction samples detect, result shows: 1. strip steel head 0-120 rice: yield strength difference range is 1.2MPa-6.6MPa, tensile strength difference range is 2.4MPa-7.5MPa, elongation percentage difference range 0.45%-4.4%；2. strip steel centre position: yield strength difference range is 0.6MPa-6.4MPa, tensile strength difference range is 1.9MPa-6.8MPa, elongation percentage difference range 0.39%-4.28%；3. tail part of band steel 0-120 rice: yield strength difference range is 2.1MPa-6.9MPa, tensile strength difference range is 2.3MPa-7.7MPa, elongation percentage difference range 0.66%-5.3%；Mechanical property is led to volume and is evenly distributed, and on different directions, difference is less, it is ensured that steel plate receives each to uniform extension when stretching or deep-draw.
(4) after smooth, belt steel surface Vickers hardness scope is 140HV-155HV, and smooth volume relatively hot rolled coil improves 5%-12%, the uniformity of rim of a cup shape after being greatly improved follow-up punch forming and processing.
(5) the bottle finished product rim of a cup maximum gauge made and difference scope 0.04mm-4.82mm of minimum diameter.
The present invention makes cylinder steel band volume logical volume uniformity of temperature profile, crystal grain is grown up, phase transformation diversity reduces, the smooth operation optimized improves belt steel surface hardness while eliminating yield point elongation, the uniformity of each mechanical property is greatly improved, respectively to the uniformity extended when substantially increasing cylinder steel posterior drawing or deep-draw, improve the uniformity of rim of a cup shape after processing, solve cylinder steel raw material " each mechanical property uneven " and rim of a cup uneven mass defect problem that " case hardness is on the low side " causes, improve safety and the aesthetic property welding bottle product.
Accompanying drawing explanation
Fig. 1 is the target dynamic continuous cooling transformation (CCT) curve of steel grade HP295 of the present invention；
Fig. 2 is cooling-rate curves different on target steel grade HP295 thickness direction of the present invention；
Fig. 3 is the metallographic structure in the embodiment of the present invention 1 with belt steel rolling direction different angles；
(a) 0 degree；(b) 30 degree；(c) 45 degree；(d) 60 degree；(e) 90 degree；
Fig. 4 is mechanical property figure on different sample position and different directions in the embodiment of the present invention 1；
(a) yield strength；(b) tensile strength；(c) elongation percentage；
Fig. 5 is smooth rear belt steel surface vickers hardness number in the embodiment of the present invention 1；
Fig. 6 is the metallographic structure in the embodiment of the present invention 2 with belt steel rolling direction different angles；
(a) 0 degree；(b) 30 degree；(c) 45 degree；(d) 60 degree；(e) 90 degree；
Fig. 7 is mechanical property figure on different sample position and different directions in the embodiment of the present invention 2；
(a) yield strength；(b) tensile strength；(c) elongation percentage；
Fig. 8 is smooth rear belt steel surface vickers hardness number in the embodiment of the present invention 2；
Fig. 9 be in the embodiment of the present invention 3 with the different angles metallographic structure of belt steel rolling direction；
(a) 0 degree；(b) 30 degree；(c) 45 degree；(d) 60 degree；(e) 90 degree；
Figure 10 is mechanical property figure on different sample position and different directions in the embodiment of the present invention 3；；
(a) yield strength；(b) tensile strength；(c) elongation percentage
Figure 11 is smooth rear belt steel surface vickers hardness number in the embodiment of the present invention 3.
Detailed description of the invention
By the following examples, the invention will be further described.
A kind of strip steel production method improving cylinder steel rim of a cup shape uniformity, specifically comprises the following steps that
(1), steel smelting-continuous casting operation produces strand: obtain pure molten steel by smelting, continuous casting uses permanent casting speed control, reducing strand component segregation, center porosity by the technology such as electromagnetic agitation, dynamic soft-reduction, be uniformly distributed field trash and obtain flawless strand, its Ingredients Weight percentage composition is respectively as follows: C:0.14%-0.17%, Si :≤0.05%, Mn:0.8%-1.0%, P :≤0.015%, S :≤0.005%, Als:0.015%-0.035%, Ti:0.01%-0.02%；
(2), strand heating process: strand is heated to 1160 DEG C-1240 DEG C, is incubated 20min-60min, eliminate strand thermograde；
(3), strand rolling process: roughing final pass rolling temperature range is 1025 DEG C-1060 DEG C, and finish rolling start rolling temperature scope is 964 DEG C-975 DEG C, avoids partial, re-crystallization warm area rolling between 978 DEG C-1023 DEG C, it is to avoid the penalty that mixed grain structure brings；Using laminar flow cooling technology, chemical composition and thickness according to strip steel design laminar flow cooldown rate and edge-masking stroke；Section cooling rate controlled is at 34.1 DEG C/s-92.8 DEG C/s；Edge-masking one side stroke is 0mm-270mm；Use combination type laminar flow refrigerating mode: strip steel upper surface laminar flow cooling water inflow is the 81%-95% of lower surface, the strip steel head 0-120 rice section cooling water yield is the 70%-85% of the normal water yield, afterbody 0-120 rice cooling water inflow is the 50%-75% of the normal water yield, and in the middle part of strip steel, the section cooling water yield is set to the normal water yield；After reducing cooling water inflow, strip steel head 0-120 rice section cooling " water-cooled section " cooldown rate of different-thickness specification controls at 38 DEG C/s-64 DEG C/s, tail part of band steel 0-120 rice section cooling " water-cooled section " cooldown rate controls at 34.1 DEG C-55 DEG C/s, and strip steel normal position section cooling " water-cooled section " cooldown rate controls at 42 DEG C/s-92.8 DEG C/s.
(4), strip coiling operation: coiling temperature is 570 DEG C-630 DEG C on the premise of ensureing performance；
(5), smooth operation: entrance tension force 60KN-180KN, outlet tension force 180KN-400KN, depressing force is 600KN-3600KN, and elongation percentage is 0.2%-1.5%.
More specifically to optimize and revise rolling mill practice embodiment as follows in field control:
Embodiment 1: obtain pure molten steel by smelting, continuous casting uses permanent casting speed control, reducing strand component segregation, center porosity by the technology such as electromagnetic agitation, dynamic soft-reduction, be uniformly distributed field trash and obtain flawless strand, its Ingredients Weight percentage composition is: C:0.140%, Si:0.0153%, Mn:0.8012%, P:0.0046%, S:0.0028%, Als:0.015%, Ti:0.0118%.Strand is heated to 1240 DEG C, is incubated 50min, eliminate strand thermograde.Roughing final pass rolling temperature is 1060 DEG C, finish rolling start rolling temperature 975 DEG C, and finishing temperature is 892 DEG C, thickness range 2.01mm-3.0mm.Section cooling takes reduction of speed cooling, the edge-masking that comes into operation, combination type refrigerating mode: 1. section cooling speed reduces by 26% on the original basis；2. edge-masking one side stroke is 186mm；3. strip steel upper surface laminar flow cooling water inflow is the 85% of lower surface, and the strip steel head 0-120 rice section cooling water yield is the 71% of the normal water yield, and afterbody 0-120 rice cooling water inflow is the 68% of the normal water yield；4. strip steel head 0-120 rice section cooling " water-cooled section " cooldown rate meansigma methods controls at 57 DEG C/s, afterbody 0-120 rice section cooling " water-cooled section " cooldown rate meansigma methods controls at 43 DEG C/s, and normal position section cooling " water-cooled section " cooldown rate meansigma methods controls at 74 DEG C/s.On the premise of ensureing performance, coiling temperature is 630 DEG C；Smooth operation: entrance tension force 160KN, exports tension force 360KN, and depressing force is 3500KN, and elongation percentage is 1.12%.
The cylinder steel head 0-120 rice mean temperature obtained and the difference 17 DEG C of afterbody 0-120 rice mean temperature.Fore side on same level line, 1/4th, heart portion, 3/4ths, driving side temperature difference maximum be 9 DEG C.Surface location grain size size range is in 5.6 μm-10.4 μm, and heart portion position grain size range is in 5.9 μm-12.8 μm.Strip steel head 0-120 rice: yield strength scope is 329.7MPa-332.5MPa, maximum difference is 2.8MPa, and tensile strength difference range is 468.1MPa-471.3MPa, and maximum difference is 3.2MPa, elongation percentage scope is 29.75%-31.49%, and maximum difference is 1.74%.2. strip steel centre position: yield strength scope is 326.9MPa-329.1MPa, maximum difference is 2.2MPa, and tensile strength difference range is 465.5MPa-468.6MPa, and maximum difference is 3.1MPa, and elongation percentage scope is 29.88%-31.38%, and maximum difference is 1.5%.3. tail part of band steel 0-120 rice: yield strength scope is 326.8MPa-332.2MPa, maximum difference is 5.4MPa, and tensile strength difference range is 464.3MPa-469.2MPa, and maximum difference is 4.9MPa, elongation percentage scope is 29.67%-31.64%, and maximum difference is 1.97%.Smooth rear belt steel surface Vickers hardness scope 146.1HV-150.3HV, smooth volume relatively hot rolled coil surface Vickers hardness improves 9.6%.Rim of a cup maximum gauge and difference scope 4.26mm of minimum diameter in subsequent forming or the course of processing.The uniformity of rim of a cup shape improves 64%.
Embodiment 2: obtain pure molten steel by smelting, continuous casting uses permanent casting speed control, reducing strand component segregation, center porosity by the technology such as electromagnetic agitation, dynamic soft-reduction, be uniformly distributed field trash and obtain flawless strand, its composition by weight percent scope is: C:0.1539%, Si:0.0294%, Mn:0.8745%, P:0.0098%, S:0.0032%, Als:0.024%, Ti:0.0179%.Strand is heated to 1196 DEG C, is incubated 45min, eliminate strand thermograde.Roughing final pass rolling temperature is 1042 DEG C, finish rolling start rolling temperature 971 DEG C, and finishing temperature is 885 DEG C, thickness range 3.01mm-6.0mm.Section cooling takes reduction of speed cooling, the edge-masking that comes into operation, combination type refrigerating mode: 1. section cooling speed reduces by 20% on the original basis；2. edge-masking one side stroke is 150mm；3. strip steel upper surface laminar flow cooling water inflow is the 90% of lower surface, and the strip steel head 0-120 rice section cooling water yield is the 76% of the normal water yield, and afterbody 0-120 rice cooling water inflow is the 73% of the normal water yield；4. strip steel head 0-120 rice section cooling " water-cooled section " cooldown rate controls at 52 DEG C/s, and afterbody 0-120 rice section cooling " water-cooled section " cooldown rate controls at 40 DEG C/s, and normal position section cooling " water-cooled section " cooldown rate controls at 65 DEG C/s.On the premise of ensureing performance, coiling temperature is 610 DEG C；Smooth operation: entrance tension force 140KN, exports tension force 320KN, and depressing force is 3000KN, and elongation percentage is 0.53%.
The cylinder steel obtained batch decoction being taken warmly measured after, the difference 11 DEG C of head 0-120 rice mean temperature and afterbody 0-120 rice mean temperature.Fore side on same level line, 1/4th, heart portion, 3/4ths, driving side temperature difference maximum be 6 DEG C.Surface location grain size size range is in 8.8 μm-13.7 μm, and heart portion position grain size range is in 9.4 μm-14.6 μm.Strip steel head 0-120 rice: yield strength scope is 330.3MPa-334.9MPa, maximum difference is 4.6MPa, and tensile strength difference range is 468.0MPa-472.1MPa, and maximum difference is 4.1MPa, elongation percentage scope is 30.54%-32.87%, and maximum difference is 2.33%.2. strip steel centre position: yield strength scope is 327.9MPa-332.7MPa, maximum difference 4.8MPa, tensile strength difference range is 466.3MPa-468.9MPa, and maximum difference is 2.6MPa, and elongation percentage scope is 31.85%-33.63%, and maximum difference is 1.78%.3. tail part of band steel 0-120 rice: yield strength scope is 329.7MPa-333.8MPa, maximum difference is 4.1MPa, and tensile strength difference range is 466.6MPa-471.9MPa, and maximum difference is 5.3MPa, elongation percentage scope is 30.16%-32.88%, and maximum difference is 2.72%.Smooth rear belt steel surface Vickers hardness scope 143.3HV-148.8HV, smooth volume relatively hot rolled coil surface Vickers hardness improves 7.6%.Rim of a cup maximum gauge and difference scope 2.84mm of minimum diameter in subsequent forming or the course of processing.The uniformity of rim of a cup shape improves 72%.
Embodiment 3: obtain pure molten steel by smelting, continuous casting uses permanent casting speed control, reducing strand component segregation, center porosity by the technology such as electromagnetic agitation, dynamic soft-reduction, be uniformly distributed field trash and obtain flawless strand, its composition by weight percent scope is: C:0.170%, Si:0.0348%, Mn:1.00%, P:0.0108%, S:0.0028%, Als:0.0349%, Ti:0.02%.Strand is heated to 1175 DEG C, is incubated 40min, eliminate strand thermograde.Roughing final pass rolling temperature is 1030 DEG C, finish rolling start rolling temperature 964 DEG C, and finishing temperature is 878 DEG C, thickness range 6.01mm-14.0mm.Section cooling takes reduction of speed cooling, the edge-masking that comes into operation, combination type refrigerating mode: 1. section cooling speed reduces by 16% on the original basis；2. edge-masking one side stroke is 95mm；3. strip steel upper surface laminar flow cooling water inflow is the 94% of lower surface, and the strip steel head 0-120 rice section cooling water yield is the 82% of the normal water yield, and afterbody 0-120 rice cooling water inflow is the 75% of the normal water yield；4. strip steel head 0-120 rice section cooling " water-cooled section " cooldown rate controls at 47 DEG C/s, and afterbody 0-120 rice section cooling " water-cooled section " cooldown rate controls at 38 DEG C/s, and normal position section cooling " water-cooled section " cooldown rate controls at 60 DEG C/s.On the premise of ensureing performance, coiling temperature is 575 DEG C；Smooth operation: entrance tension force 120KN, exports tension force 290KN, and depressing force is 2700KN, and elongation percentage is 0.29%.
After the cylinder steel coiling temperature that obtains is measured, the difference 8 DEG C of head 0-120 rice mean temperature and afterbody 0-120 rice mean temperature.Fore side on same level line, 1/4th, heart portion, 3/4ths, driving side temperature difference 5 DEG C.Surface location grain size size range is in 7.7 μm-14.6 μm, and heart portion position grain size range is in 8.8 μm-15.9 μm.Strip steel head 0-120 rice: yield strength scope is 324.2MPa-327.2MPa, maximum difference is 3.0MPa, and tensile strength difference range is 462.5MPa-466.2MPa, and maximum difference is 3.7MPa, elongation percentage scope is 32.23%-34.12%, and maximum difference is 1.89%.2. strip steel centre position: yield strength scope is 322.7MPa-329.1MPa, maximum difference is 6.4MPa, and tensile strength difference range is 460.5MPa-463.9MPa, and maximum difference is 3.4MPa, and elongation percentage scope is 32.68%-33.54%, and maximum difference is 0.86%.3. tail part of band steel 0-120 rice: yield strength scope is 323.8MPa-328.2MPa, maximum difference is 4.4MPa, and tensile strength difference range is 461.3MPa-464.6MPa, and maximum difference is 3.3MPa, elongation percentage scope is 32.37%-33.44%, and maximum difference is 1.07%.Smooth rear belt steel surface Vickers hardness scope (140.8-147) HV, smooth volume relatively hot rolled coil surface Vickers hardness improves 5.45%.Rim of a cup maximum gauge and difference scope 1.29mm of minimum diameter in subsequent forming or the course of processing.The uniformity of rim of a cup shape improves 80%.
Claims (3)
1. improve a strip steel production method for cylinder steel rim of a cup shape uniformity, comprise following processing step:
(1), steel smelting-continuous casting operation produces strand；
(2), strand heating process, eliminate strand thermograde；
(3), strand rolling process；
(4), strip coiling operation；
(5), smooth operation；
In described step (1), strand Ingredients Weight percentage composition is respectively as follows: C:0.14%-0.17%, Si :≤0.05%, Mn:0.8%-1.0%, P :≤0.015%, S :≤0.005%, Als:0.015%-0.035%, Ti:0.01%-0.02%；The type of cooling of described step (3) strand rolling is section cooling, and in described step (4), coiling temperature is 570 DEG C-630 DEG C, it is characterised in that: described step (2) slab heating temperature is 1160 DEG C-1240 DEG C, is incubated 40 min-60 min；In described step (3) rolling process, laminar flow cooldown rate controls at 34.1 DEG C/s-92.8 DEG C/s；
In described step (3) rolling process, edge-masking one side stroke is 0-270mm；The section cooling water yield is controlled as: strip steel upper surface laminar flow cooling water inflow is by weight percentage for the 81%-95% of lower surface, the strip steel head 0-120 rice section cooling water yield is the 70%-85% of the normal water yield by weight percentage, tail part of band steel 0-120 rice cooling water inflow is the 50%-75% of the normal water yield by weight percentage, and in the middle part of strip steel, the section cooling water yield is set to the normal water yield；After reducing cooling water inflow, strip steel head 0-120 rice section cooling " water-cooled section " cooldown rate of different-thickness specification controls at 38 DEG C/s-64 DEG C/s, tail part of band steel 0-120 rice section cooling " water-cooled section " cooldown rate controls at 34.1 DEG C/s-55 DEG C/s, and strip steel normal position section cooling " water-cooled section " cooldown rate controls at 42 DEG C/s-92.8 DEG C/s；In described step (3), the normal water yield of section cooling is strip steel upper surface cooling water inflow and lower surface cooling water inflow sum, scope 2000m3/h -2680m3/h。
A kind of strip steel production method improving cylinder steel rim of a cup shape uniformity the most as claimed in claim 1, it is characterized in that: in described step (3) rolling process, roughing final pass rolling temperature range is 1025 DEG C-1060 DEG C, finish rolling start rolling temperature scope is 964 DEG C-975 DEG C, avoids partial, re-crystallization warm area rolling between 978 DEG C-1023 DEG C.
A kind of strip steel production method improving cylinder steel rim of a cup shape uniformity the most as claimed in claim 1, it is characterized in that: in described step (5) smooth operation, entrance tension force controls as 60KN-180KN, outlet tension force controls as 180KN-400KN, depressing force controls to be 600KN-3600KN, and elongation control is 0.2%-1.5%.
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| CN109576467B (en) * | 2019-01-08 | 2021-03-09 | 邯郸钢铁集团有限责任公司 | Control method for improving uniformity of coiling performance of Nb-containing low-alloy high-strength steel |
| CN110760752A (en) * | 2019-10-10 | 2020-02-07 | 邯郸钢铁集团有限责任公司 | NM300XT steel strip with good formability and method for producing the same |
| CN113025795B (en) * | 2021-02-04 | 2022-12-16 | 首钢集团有限公司 | Method for improving structure uniformity of cold-rolled high-strength steel |
| CN113930674B (en) * | 2021-09-13 | 2022-07-22 | 广西柳州钢铁集团有限公司 | Welded bottle steel hot-rolled plate strip HP295 and manufacturing method thereof |
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| CN103774039A (en) * | 2013-12-26 | 2014-05-07 | 马钢(集团)控股有限公司 | Manufacturing process for steel hot-rolled plate coil for welded gas bottle |
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2015
- 2015-04-17 CN CN201510183706.0A patent/CN104831166B/en not_active Expired - Fee Related
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| EP1375694A1 (en) * | 2002-06-19 | 2004-01-02 | Rautaruukki OYJ | Hot-rolled steel strip and method for manufacturing the same |
| CN103667882A (en) * | 2013-12-26 | 2014-03-26 | 马钢(集团)控股有限公司 | High-plasticity steel hot-rolled coil for welded gas cylinder and production technology of high-plasticity steel hot-rolled coil |
| CN103725958A (en) * | 2013-12-26 | 2014-04-16 | 马钢(集团)控股有限公司 | Steel hot rolled plate coil for economical welded gas cylinder and production process thereof |
| CN103774039A (en) * | 2013-12-26 | 2014-05-07 | 马钢(集团)控股有限公司 | Manufacturing process for steel hot-rolled plate coil for welded gas bottle |
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| CN104831166A (en) | 2015-08-12 |
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