CN103506405B - The compensation method of the finish rolling roll gap that stainless steel reinforced concrete rolls - Google Patents
The compensation method of the finish rolling roll gap that stainless steel reinforced concrete rolls Download PDFInfo
- Publication number
- CN103506405B CN103506405B CN201310445745.4A CN201310445745A CN103506405B CN 103506405 B CN103506405 B CN 103506405B CN 201310445745 A CN201310445745 A CN 201310445745A CN 103506405 B CN103506405 B CN 103506405B
- Authority
- CN
- China
- Prior art keywords
- steel
- alpha
- roll gap
- ksk
- rolling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Metal Rolling (AREA)
Abstract
The invention provides the compensation method of the finish rolling roll gap that stainless steel reinforced concrete rolls.The method comprises the steps: step one, determines to treat the chemical composition factor alpha of finish rolling steel and the chemical composition factor alpha1 of lastblock finish rolling steel; Then, according to the absolute value of alpha-alpha1, determine steel grade penalty coefficient coff_alpha, wherein steel grade penalty coefficient coff_alpha is 0-0.6; Step 2, according to following formulae discovery roll gap penalty coefficient ksk_alpha, ksk_alpha=(alpha – alpha1) × coff_alpha; Step 3, according to stiffness curve during acyclic homologically trioial, determines the bouncing value DH(I of each finishing stand), wherein I represents finishing stand number; Step 4, determine roll gap S0 at the zero point (I) after acyclic homologically trioial, wherein I represents finishing stand number; Step 5, determine roll gap correction value KSK (I), wherein I represents finishing stand number; Step 6, according to following formula, determine each finishing mill gap values between rollers S (I): S (I)=THEN (I+1) – DH (I)+S0 (I)+KSK (I)+ksk_alpha, wherein THEN (I+1) represents the exit thickness of I machine frame.The present invention has effectively expanded the specifications vary restriction of hot steel rolling production.
Description
Technical field
The present invention relates to the milling method of hot steel rolling production, especially the milling method of thickness, pressure, roll gap hot steel rolling production accurately.
Background technology
Hot continuous rolling process is a kind of mode of producing steel, is generally and makes raw material by continuous casting steel billet or plate slab.First slab heats in the temperature of heating furnace according to process stipulation, is heated to target temperature.Then slab is through high-pressure water descaling, then enters roughing mill, and usual roughing vertical roll controls width, and plain-barreled roll controls thickness.Through the rolling of roughing mills, the target thickness, width and the temperature that band steel are reached preset, be then with steel to enter mm finishing mill unit again and carry out continuous rolling, the target thickness, the temperature that band steel are reached preset.Finally by coiling machine, band steel is configured as coil of strip.
It is existing hot continuous rolling process skeleton diagram shown in Fig. 1.Equipment in this artwork comprises: heating furnace (4) 1, high-pressure water descaling case 2, rough rolling vertical roller mill (VE0) 3, roughing flat roll mill (R0) 4, stay-warm case 5, rotary drum crop flying shear 6, finishing stand (7 add frame) 7, profile gauge 8, width gage 9, calibrator 10, Straightness Meter 11, coiling machine 12.
Hot continuous rolling production line ageing equipment can cause equipment precision to reduce, main manifestations is that after each roll change, mm finishing mill unit carries out acyclic homologically trioial, after acyclic homologically trioial, first piece of steel thickness and precision of rolling is low, often occur exceeding thickness deviation that user requires and cause waste product to occur, namely after acyclic homologically trioial, first piece of steel rolling can not meet Product Precision requirement.
In addition, market competition causes the product structure of hot continuous rolling constantly to change, softwood matter steel and hard material steel, the switching phenomenon of large span frequently occurs between thin gauge strip and heavy gauge steel strip, when switching, first block of steel can not meet the requirement of Product Precision.
Further, stainless steel and carbon steel carry out mixed roll (every rolling two blocks of carbon steels, with regard to rolling one block of stainless steel, this rolling unit is always by this rule scheduling rolling) rolling time, stainless steel, carbon steel all can not meet Product Precision requirement.
Summary of the invention
Technical problem to be solved by this invention is: overcome the steel thickness that the stainless steel reinforced concrete of existing hot continuous rolling rolls and surpass tolerance and waste Phenomena, provide the milling method of hot steel rolling production, roll for stainless steel reinforced concrete and add roll gap compensation, effectively expanded the specifications vary restriction of hot steel rolling production.
In order to solve the problems of the technologies described above, the first technical scheme provided by the invention is, the compensation method of the finish rolling roll gap that a kind of stainless steel reinforced concrete rolls, the method comprises the steps:
Step one, determines to treat the chemical composition factor alpha of finish rolling steel and the chemical composition factor alpha1 of lastblock finish rolling steel; Then, according to the absolute value of alpha-alpha1, determine steel grade penalty coefficient coff_alpha, wherein steel grade penalty coefficient coff_alpha is 0-0.6;
Step 2, according to following formulae discovery roll gap penalty coefficient ksk_alpha,
ksk_alpha=（alpha–alpha1）×coff_alpha；
Step 3, according to stiffness curve during acyclic homologically trioial, determines the bouncing value DH(I of each finishing stand), wherein I represents finishing stand number;
Step 4, determine roll gap S0 at the zero point (I) after acyclic homologically trioial, wherein I represents finishing stand number;
Step 5, determine roll gap correction value KSK (I), wherein I represents finishing stand number;
Step 6, according to following formula, determine each finishing mill gap values between rollers S (I):
S(I)=THEN(I+1)–DH(I)+S0(I)+KSK(I)+ksk_alpha，
Wherein THEN (I+1) represents the exit thickness of I machine frame.
The finishing stand draught pressure compensation method that aforesaid stainless steel reinforced concrete rolls, calculates the pressure correcting coefficient NNFKORR(Ia of each block rolled steel), and carry out record together with corresponding steel grade, thickness, width and chemical composition, building database; Wherein NNFKORR(Ia) computational methods be: NNFKORR(Ia)=NNFKORR(I
0)+0.68 × (F(I
0)-F(I
00))/F(I
00), wherein NNFKORR(I
0) block steel pressure correcting coefficient in expression, F(I
0) actual pressure of block steel correction in expression, F(I
00) the uncorrected setting pressure of block steel in expression.
The finishing stand draught pressure compensation method that aforesaid stainless steel reinforced concrete rolls, according to 15 kinds of chemical compositions in steel: C, Si, Mn, P, S, Al, Cr, Cu, Mo, Ti, Ni, V, Nb, N, B, at pressure correcting coefficient NNFKORR(Ia) in database, to be rolled 100 blocks of steel of steel several finishing stand rolling for calculation level returns, the pressure coefficient NNFKORR(Ia by these 100 blocks of steel) averaging calculates alpha and alpha1; When steel number is less than 100 pieces, get the pressure coefficient NNFKORR(I of the frame of actual block number
a).
The finishing stand draught pressure compensation method that aforesaid stainless steel reinforced concrete rolls, absolute value and the steel grade penalty coefficient coff_alpha corresponding relation of alpha-alpha1 are as follows:
The invention provides the milling method of hot steel rolling production, roll for stainless steel reinforced concrete and add roll gap compensation, effectively expand the specifications vary restriction of hot steel rolling production.
Accompanying drawing explanation
Fig. 1 rolling process skeleton diagram of the present invention;
First finishing stand stiffness curve in Fig. 2 specific embodiment of the invention.
Second finishing stand stiffness curve in Fig. 3 specific embodiment of the invention.
3rd finishing stand stiffness curve in Fig. 4 specific embodiment of the invention.
4th finishing stand stiffness curve in Fig. 5 specific embodiment of the invention.
5th finishing stand stiffness curve in Fig. 6 specific embodiment of the invention.
6th finishing stand stiffness curve in Fig. 7 specific embodiment of the invention.
7th finishing stand stiffness curve in Fig. 8 specific embodiment of the invention.
Detailed description of the invention
For fully understanding the object of the present invention, feature and effect, by following concrete embodiment, the present invention is elaborated.
The invention provides the milling method of hot steel rolling production, roll for stainless steel reinforced concrete and add roll gap compensation, effectively expand the specifications vary restriction of hot steel rolling production.
The control system of hot continuous rolling adopts two-stage computer control, and namely process control computer (L2 computer) controls to control with basic automatization computer (L1).Technical scheme of the present invention is mainly for the THICKNESS CONTROL of finishing mill, and THICKNESS CONTROL process is as follows:
S1 calculates in the parameters of L2 level computer to THICKNESS CALCULATION;
S2 by L2 level calculation by computer to send L1 computer SDH module (setting proxy module) under message mode;
S3 sets up the communication channel of SDH to press control module;
S4 reads message data value, is sent to transmission system controll block, performs design parameter, controls.
The technology of the present invention to the effect that for L2 computer, inventive improvements has been carried out to the control method of thickness aspect.
The control procedure of conventional thickness calculating aspect is:
1, according to steel at finishing stand inlet thickness and exit thickness, determine each finishing stand reduction ratio according to the following equation,
Wherein, I represents finishing mill shelf number;
EPS(I) finishing stand reduction ratio is represented;
THEN(I) represent that steel is at finishing stand inlet thickness;
THEN(I+1) represent that steel is at finishing stand exit thickness;
According to supplied materials (roughing outlet) thickness, finish rolling target thickness and finished product (finish rolling outlet) thickness, determine each frame reduction ratio.The process allocation regulation of each frame inlet thickness and exit thickness basic of distribution finish rolling supplied materials thickness, exit thickness and each steel grade determined.
2, each finishing mill draught pressure is determined according to following formula:
F（I）=NNFKORR（I）×MH（I）×EPS（I）（2）
Wherein, I represents finishing mill shelf number;
EPS(I) the finishing stand reduction ratio that calculates of representation formula (1);
MH(I) represent hardness number, hardness number can be tested according to standard GB/T231-2002.Hardness in the present invention refers to Brinell hardness (HB).
The following detailed description of average pressure correction factor NNFKORR(I) defining method:
(1) the pressure correcting coefficient NNFKORR(Ia of each block rolled steel is calculated), and carry out record together with corresponding steel grade, thickness, width and chemical composition, building database; Wherein every block steel NNFKORR(Ia) computational methods be: NNFKORR(Ia)=NNFKORR(I0)+0.68 × (F(I
0)-F(I
00))/F(I
00), wherein NNFKORR(I
0) block steel pressure correcting coefficient in expression, F(I
0) actual pressure of block steel correction in expression, F(I
00) the uncorrected setting pressure of block steel in expression.
(2) average pressure correction factor NNFKORR(I is read): confirmation average pressure correction factor NNFKORR(I) is divided into long genetic value and short genetic value two kinds of situations.Long genetic value really fixed condition is: 1) when this block steel steel grade and upper block steel steel grade inconsistent time, get long genetic value; 2) long genetic value is got when this block steel thickness and upper piece steel Thickness Ratio are comparatively more than or equal to 10%; 3) long genetic value is got when this block steel width compares be more than or equal to 10% with upper piece steel width.As long as above three conditions meet a condition, then get long genetic value.
NNFKORR(I is determined according to long genetic value) method is: the mean value NNFKORR(Ia getting 30 blocks of close steel in step (1) established data storehouse) is as the NNFKORR(I of this block steel).When in database be less than 30 blocks of steel close to steel number time, get the NNFKORR(Ia of actual bloom number) mean value.When in database without this steel grade time, NNFKORR(I) get default value 1.0.
Above-mentioned close steel refers to that in database, steel grade is identical, chemical composition, thickness, width change be less than 10% steel.Chemical composition change is less than 10% and refers to that each chemical composition of C, Si, Mn, P, S, Al, Cr, Cu, Mo, Ti, Ni, V, Nb, N, B differs all within 10% with this block steel.
Short genetic value really fixed condition is: when steel grade, thickness, width change and be less than 10%, get short genetic value, namely go up block steel NNFKORR(I) calculated value.
3, each finishing mill gap values between rollers S (I) is determined:
S(I)=THEN(I+1)–DH(I)+S0(I)+KSK(I)（3）
Wherein, I represents finishing mill shelf number;
THEN (I+1) represents the exit thickness of I machine frame;
S0 (I) represents roll gap at zero point, after each roll change, every rolling mill all will carry out acyclic homologically trioial, acyclic homologically trioial refers to that this frame draught pressure under no-load condition reaches the roll gap of 1500 ton hours as zero roll gap, but in actual acyclic homologically trioial process, the unloaded draught pressure of milling train reaches 1500 ton hours and has deviation, sometimes larger, sometimes smaller, namely the difference of the roll gap under the roll gap under actual acyclic homologically trioial pressure and 1500 tons is called roll gap at zero point, this value is measured automatically by spot sensor, reaches L2 computer afterwards by L1 computer.
KSK(I) be roll gap correction value, actual roll gap and the difference calculating roll gap when its computational methods are upper piece steel rolling, i.e. KSK (I)=upper actual roll gap of block steel-upper block steel calculating roll gap; After roll change, first piece of this parameter value of steel is 0.
DH(I) represent the bouncing value under the draught pressure that this frame calculates at formula (2), this bouncing value gets bouncing value corresponding on curve according to force value from the stiffness curve of each frame.Such as, in a detailed description of the invention, adopt 7 frame finishing mills, the stiffness curve of each frame of finish rolling as illustrated in figs. 2 through 8.Stiffness curve is draught pressure and spring homologous thread, and abscissa represents draught pressure (unit: KN), and ordinate represents the bouncing value (unit: mm) of roll gap under this draught pressure, reads bouncing value DH(I from curve).
When mixed rolling, above-mentioned computational methods can not meet the thickness requirement of band steel, thus have influence on rolling accuracy.Formula (3), on above-mentioned calculating basis, is revised as by the present invention:
S(I)=THEN(I+1)–DH(I)+S0(I)+KSK(I)+ksk_alpha（4）
The following detailed description of the compensation method of the finish rolling roll gap that stainless steel reinforced concrete rolls, the method comprises the steps:
Step one, determines to treat the chemical composition factor alpha of finish rolling steel and the chemical composition factor alpha1 of lastblock finish rolling steel; Then, according to the absolute value of alpha-alpha1, determine steel grade penalty coefficient coff_alpha, wherein steel grade penalty coefficient coff_alpha is 0-0.6.
The following detailed description of the defining method of chemical composition factor alpha and alpha1.
(1) according to 15 kinds of chemical compositions: C, Si, Mn, P, S, Al, Cr, Cu, Mo, Ti, Ni, V, Nb, N, B, from pressure correcting coefficient NNFKORR(Ia) database get the pressure coefficient NNFKORR(Ia of each frame (such as F0 ~ F6) of 100 blocks of steel of chemical composition the most recent identical rolling); As less than 100 blocks of steel, then get the pressure coefficient NNFKORR(Ia of each frame of actual block number); As in database without identical chemical composition, then get the pressure coefficient NNFKORR(Ia of each frame of 100 blocks of steel (less than 100 blocks of steel, then getting actual block number) of chemistry similar composition); As in database without chemistry similar composition, get default value 1.0.
The most recent above-mentioned rolling refers to be rolled steel for calculation level time point is toward travelling backwards, the same or similar 100 blocks of steel of chemical composition of the finishing stand rolling of counting or actual steel.
Chemistry similar composition refers to that each chemical composition of C, Si, Mn, P, S, Al, Cr, Cu, Mo, Ti, Ni, V, Nb, N, B differs all within 10wt% with this block steel.
(2) by the pressure coefficient NNFKORR(Ia of institute's organic frame of got steel) calculating mean value, this mean value is the chemical composition factor alpha of this block steel.
Step 2, according to following formulae discovery roll gap penalty coefficient ksk_alpha,
ksk_alpha=（alpha–alpha1）×coff_alpha（5）
Step 3, according to stiffness curve during acyclic homologically trioial, determines the bouncing value DH(I of each finishing stand), wherein I represents finishing stand number;
Step 4, determine roll gap S0 at the zero point (I) after acyclic homologically trioial, wherein I represents finishing stand number.
After each roll change, every rolling mill all will carry out acyclic homologically trioial, and acyclic homologically trioial refers to that this frame draught pressure under no-load condition reaches the roll gap of 1500 ton hours as zero roll gap.But in actual acyclic homologically trioial process, the unloaded draught pressure of milling train reaches 1500 ton hours and has deviation, sometimes larger, sometimes smaller, namely the difference of the roll gap under the roll gap under actual acyclic homologically trioial pressure and 1500 tons is called roll gap at zero point.This value can be measured automatically by spot sensor, reaches L2 computer afterwards by L1 computer.
Step 5, determine roll gap correction value KSK (I), wherein I represents finishing stand number; Roll gap S (I after roll gap correction value KSK (I)=upper block steel correction
0)-upper uncorrected roll gap the S of block steel (I
00).
Step 6, according to following formula, determine each finishing mill gap values between rollers S (I):
S(I)=THEN(I+1)–DH(I)+S0(I)+KSK(I)+ksk_alpha（4）
Wherein THEN (I+1) represents the exit thickness of I machine frame.
Preferably, steel grade penalty coefficient coff_alpha, as shown in table 1,
Table 1: steel grade penalty coefficient value table
The present invention can improve on-the-spot rolling stability, improve production efficiency and product quality, and makes the production of hot continuous rolling meet the production requirement of small lot, multi items, many structures, improves the competitiveness of product.
Use method of the present invention, steel breed structure can be adjusted, realize variety steel open rolling, the leap of the aspect such as stainless steel rolls without hot rolling material, kind steel reinforced concrete, the rolling of steel grade specification large span, non-scheduling transition specification, economic benefit is obvious, for the lifting of competitive power of product plays a key effect.
Use method of the present invention, the special kinds such as pure iron, titanium plate can be realized at the development and production of hot continuous rolling operation, improve Taiyuan Iron and Steel Co. competitiveness.
Set forth this method below by specific embodiment, one skilled in the art will appreciate that this should not be understood to the restriction to the claims in the present invention scope.
Embodiment
the method of the compensation of roll gap when carrying out mixed bundle for stainless steel and carbon steel
The concrete composition (wt%) of the carbon steel SPAH used in following examples, stainless steel TTS443, carbon steel T510L, stainless steel SUS304, carbon steel SPHC, stainless steel 00CR18MO2 is as follows:
SPAH：C：0.09、Si：0.47、Mn：0.4、P：0.01、S：0.01、Al：0、Cr：0.36、Cu：0.27、Mo：0、Ti：0、Ni：0.12、V：0、Nb：0、N：0、B：0。
TTS443：C：0.005、Si：0.39、Mn：0.08、P：0.01、S：0.002、Al：0、Cr：20.68、Cu：0.37、Mo：0、Ti：0.19、Ni：0.09、V：0、Nb：0.14、N：0.014、B：0。
T510L：C：0.097、Si：0.07、Mn：1.25、P：0.01、S：0.005、Al：0.026、Cr：0.02、Cu：0.009、Mo：0、Ti：0.001、Ni：0.017、V：0、Nb：0.019、N：0、B：0。
SUS304：C：0.05、Si：0.45、Mn：1.14、P：0.03、S：0.002、Al：0、Cr：18.19、Cu：0、Mo：0.07、Ti：0、Ni：8.02、V：0、Nb：0、N：0.04、B：0。
SPHC：C：0.04、Si：0.02、Mn：0.27、P：0.01、S：0.01、Al：0.06、Cr：0、Cu：0、Mo：0、Ti：0、Ni：0.02、V：0、Nb：0、N：0、B：0；
00CR18MO2:C：0.005、Si：0.29、Mn：0.1、P：0.01、S：0.001、Al：0、Cr：17.55、Cu：0、Mo：0.1、Ti：0.14、Ni：0.09、V：0、Nb：0.15、N：0.016、B：0。
During embodiment 1 finish rolling, SPAH and TTS443 switches
According to the flow process of Fig. 1, switching processing is carried out to SPAH and TTS443 continuous casting steel billet, the size of this SPAH and TTS443 continuous casting steel billet respectively: thickness 220mm, width 1280mm, length 9.4m and thickness 200mm, width 1280mm, length 8.6m.This embodiment control system adopts two-stage computer control, and namely process control computer (L2 computer) controls to control with basic automatization computer (L1).Change the working roll of finishing mill, the situation of foundation milling train both sides roll-force and oil column difference redefines the roll gap zero-bit of milling train.
Heated at heating furnace 0 and 1# respectively by SPAH and TTS443 continuous casting steel billet, wherein the heating-up temperature of 0# heating furnace is 1250 DEG C, and the heat time is 200 minutes; The heating-up temperature of 1# heating furnace is 1200 DEG C, and the heat time is 190 minutes.
It is that the water of 17MPa rinses 9.4 seconds and 8.6 seconds that SPAH and TTS443 continuous casting steel billet after heating enters high-pressure water descaling case pressure respectively.
SPAH and TTS443 continuous casting plate after high-pressure water descaling enters roughing mill respectively, and roughing vertical roll controls width, and plain-barreled roll controls thickness.Through the rolling of roughing mills, the SPAH belt steel thickness obtained is 42mm, width is 1250mm, and temperature is 1100 DEG C, and TTS443 belt steel thickness is 33mm, width is 1285mm, and temperature is 1060 DEG C.
Through the rolling of mm finishing mill unit, the SPAH belt steel thickness obtained is 2.91mm, width is 1250mm, and temperature is 860 DEG C, and TTS443 belt steel thickness is 3.9mm, width is 1285mm, and temperature is 880 DEG C.
Mm finishing mill unit comprises 7 finishing stands.
According to its 15 kinds of chemical compositions: C, Si, Mn, P, S, Al, Cr, Cu, Mo, Ti, Ni, V, Nb, N, B, from pressure correcting coefficient NNFKORR(Ia) database get the pressure coefficient NNFKORR(Ia of each frame of the identical nearest 100 blocks of steel of chemical composition), calculating mean value, obtaining SPAH is with the chemical composition factor alpha of steel to be that 1.05, TTS443 is with the chemical composition factor alpha of steel to be 0.73.Be with steel and TTS443 to be with steel chemical composition factor difference 0.32 according to SPAH, determine that steel grade penalty coefficient coff_alpha is 0.1.According to formula ksk_alpha=(alpha – alpha1) × coff_alpha, roll gap penalty coefficient ksk_alpha is ± 0.032mm.According to roll gap S (I after roll gap correction value KSK (I)=upper block steel correction
0)-upper uncorrected roll gap the S of block steel (I
00), calculate the roll gap correction value of each frame.Difference according to the roll gap of the roll gap under the acyclic homologically trioial pressure of reality and 1500 tons of lower acyclic homologically trioials determines each frame roll gap at zero point S0 (I).
Each finishing mill roll gap is determined: S (I)=THEN (I+1) – DH (I)+S0 (I)+KSK (I)+ksk_alpha according to following formula.According to draught pressure and the rolling temperature of following table, steel and TTS443 is with to be with steel to switch finish rolling to SPAH.
After above-mentioned finish rolling, the SPAH obtained is with the thickness of steel to be that 2.93mm, TTS443 are with the thickness of steel to be 3.88mm, meets customer requirement.Finally by coiling machine, band steel is configured as coil of strip.
During embodiment 2 finish rolling, T510L and SUS304 switches
The present embodiment adopts process substantially the same manner as Example 1, and difference is:
The size of T510L and SUS304 continuous casting steel billet is respectively: thickness 220mm, width 1310mm, length 6.89m and thickness 180mm, width 1240mm, length 9.6m.
Through the rolling of roughing mills, the T510L belt steel thickness obtained is 40mm, width is 1300mm, and temperature is 1080 DEG C, and SUS304 belt steel thickness is 37mm, width is 1250mm, and temperature is 1090 DEG C.
Through the rolling of mm finishing mill unit, the T510L belt steel thickness obtained is 2.91mm, width is 1300mm, and temperature is 900 DEG C, and SUS304 belt steel thickness is 3.0mm, width is 1240mm, and temperature is 980 DEG C.
T510L is with the chemical composition factor alpha of steel to be that 1.09, SUS304 is with the chemical composition factor alpha of steel to be 1.47.Be with steel and SUS304 to be with steel chemical composition factor difference 0.38 according to T510L, determine that steel grade penalty coefficient coff_alpha is 0.2.According to formula ksk_alpha=(alpha – alpha1) × coff_alpha, roll gap penalty coefficient ksk_alpha is ± 0.072mm.
Each finishing mill roll gap is determined: S (I)=THEN (I+1) – DH (I)+S0 (I)+KSK (I)+ksk_alpha according to following formula.According to draught pressure and the rolling temperature of following table, steel and SUS304 is with to be with steel to switch finish rolling to T510L.
After above-mentioned finish rolling, the thickness of the T510L obtained is that 2.93mm, SUS304 are with the thickness of steel to be 2.98mm, meets customer requirement.Finally by coiling machine, band steel is configured as coil of strip.
During embodiment 3 finish rolling, SPHC and 00CR18MO2 switches
The present embodiment adopts process substantially the same manner as Example 1, and difference is:
The size of SPHC and 00CR18MO2 continuous casting steel billet is respectively: thickness 220mm, width 1250mm, length 9.4m and thickness 200mm, width 1240mm, length 8.6m.
Through the rolling of roughing mills, the SPHC belt steel thickness obtained is 45mm, width is 1250mm, and temperature is 1080 DEG C, and 00CR18MO2 belt steel thickness is 33mm, width is 1255mm, and temperature is 1060 DEG C.
Through the rolling of mm finishing mill unit, the SPHC belt steel thickness obtained is 4.9mm, width is 1250mm, and temperature is 860 DEG C, and 00CR18MO2 belt steel thickness is 3.9mm, width is 1255mm, and temperature is 860 DEG C.
SPHC is with the chemical composition factor alpha of steel to be that 0.73,00CR18MO2 is with the chemical composition factor alpha of steel to be 0.88.Be with steel chemical composition factor difference 0.15 according to SPHC and 00CR18MO2, determine that steel grade penalty coefficient coff_alpha is 0.According to formula ksk_alpha=(alpha – alpha1) × coff_alpha, roll gap penalty coefficient ksk_alpha is 0.
Each finishing mill roll gap is determined: S (I)=THEN (I+1) – DH (I)+S0 (I)+KSK (I)+ksk_alpha according to following formula.According to draught pressure and the rolling temperature of following table, steel is with to switch finish rolling to SPHC and 00CR18MO2.
After above-mentioned finish rolling, the thickness of the SPHC obtained is that 4.92mm, 00CR18MO2 are with the thickness of steel to be 3.89mm, meets customer requirement.Finally by coiling machine, band steel is configured as coil of strip.
During embodiment 4 finish rolling, SPHC and SUS304 switches
The present embodiment adopts process substantially the same manner as Example 1, and difference is:
The size of SPHC and SUS304 continuous casting steel billet is respectively: thickness 220mm, width 1250mm, length 9.4m and thickness 180mm, width 1240mm, length 9.6m.
Through the rolling of roughing mills, the SPHC belt steel thickness obtained is 45mm, width is 1250mm, and temperature is 1080 DEG C, and SUS304 belt steel thickness is 37mm, width is 1250mm, and temperature is 1090 DEG C.
Through the rolling of mm finishing mill unit, the SPHC belt steel thickness obtained is 4.9mm, width is 1250mm, and temperature is 860 DEG C, and SUS304 belt steel thickness is 3.0mm, width is 1240mm, and temperature is 980 DEG C.
SPHC is with the chemical composition factor alpha of steel to be that 0.73, SUS304 is with the chemical composition factor alpha of steel to be 1.47.Be with steel chemical composition factor difference 0.74 according to SPHC and SUS304, determine that steel grade penalty coefficient coff_alpha is 0.74.According to formula ksk_alpha=(alpha – alpha1) × coff_alpha, roll gap penalty coefficient ksk_alpha is 0.23mm.
Each finishing mill draught pressure is determined: S (I)=THEN (I+1) – DH (I)+S0 (I)+KSK (I)+ksk_alpha according to following formula.According to draught pressure and the rolling temperature of following table, steel is with to switch finish rolling to SPHC and 00CR18MO2.
After above-mentioned finish rolling, the thickness of the SPHC obtained is that 4.88mm, SUS304 are with the thickness of steel to be 3.01mm, meets customer requirement.Finally by coiling machine, band steel is configured as coil of strip.
Claims (4)
1. the stainless steel reinforced concrete compensation method of finish rolling roll gap of rolling, the method comprises the steps:
Step one, determines to treat the chemical composition factor alpha of finish rolling steel and the chemical composition factor alpha1 of lastblock finish rolling steel; Then, according to the absolute value of alpha-alpha1, determine steel grade penalty coefficient coff_alpha, wherein steel grade penalty coefficient coff_alpha is 0-0.6;
Step 2, according to following formulae discovery roll gap penalty coefficient ksk_alpha,
ksk_alpha＝(alpha–alpha1)×coff_alpha；
Step 3, according to stiffness curve during acyclic homologically trioial, determine the bouncing value DH (I) of each finishing stand, wherein I represents finishing stand number;
Step 4, determine roll gap S0 at the zero point (I) after acyclic homologically trioial, wherein I represents finishing stand number;
Step 5, determine roll gap correction value KSK (I), wherein I represents finishing stand number;
Step 6, according to following formula, determine each finishing mill gap values between rollers S (I):
S(I)＝THEN(I+1)–DH(I)+S0(I)+KSK(I)+ksk_alpha，
Wherein THEN (I+1) represents the exit thickness of I machine frame.
2. the stainless steel reinforced concrete according to claim 1 compensation method of finish rolling roll gap of rolling, it is characterized in that, calculate the pressure correcting coefficient NNFKORR (Ia) of each block rolled steel, and carry out record together with corresponding steel grade, thickness, width and chemical composition, building database; Wherein the computational methods of NNFKORR (Ia) are: NNFKORR (Ia)=NNFKORR (I
0)+0.68 × (F (I
0)-F (I
00))/F (I
00), wherein NNFKORR (I
0) block steel pressure correcting coefficient in expression, F (I
0) actual pressure of block steel correction in expression, F (I
00) the uncorrected setting pressure of block steel in expression.
3. the stainless steel reinforced concrete according to claim 1 and 2 compensation method of finish rolling roll gap of rolling, it is characterized in that, according to 15 kinds of chemical compositions in steel: C, Si, Mn, P, S, Al, Cr, Cu, Mo, Ti, Ni, V, Nb, N, B, in pressure correcting coefficient NNFKORR (Ia) database, with 100 blocks of steel of rolled steel several finishing stand rolling for calculation level returns, the pressure coefficient NNFKORR (Ia) of these 100 blocks of steel is averaged and calculates alpha and alpha1; When steel number is less than 100 pieces, get the pressure coefficient NNFKORR (Ia) of the frame of actual block number.
4. the stainless steel reinforced concrete according to claim 3 compensation method of finish rolling roll gap of rolling, it is characterized in that, absolute value and the steel grade penalty coefficient coff_alpha corresponding relation of alpha-alpha1 are as follows:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310445745.4A CN103506405B (en) | 2013-09-26 | 2013-09-26 | The compensation method of the finish rolling roll gap that stainless steel reinforced concrete rolls |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310445745.4A CN103506405B (en) | 2013-09-26 | 2013-09-26 | The compensation method of the finish rolling roll gap that stainless steel reinforced concrete rolls |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103506405A CN103506405A (en) | 2014-01-15 |
| CN103506405B true CN103506405B (en) | 2015-11-25 |
Family
ID=49890133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310445745.4A Active CN103506405B (en) | 2013-09-26 | 2013-09-26 | The compensation method of the finish rolling roll gap that stainless steel reinforced concrete rolls |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103506405B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104209343B (en) * | 2014-09-05 | 2016-06-29 | 山西太钢不锈钢股份有限公司 | Hot-rolling finishing mill frame compensates the control method of prompt drop |
| CN105855298B (en) * | 2015-01-23 | 2017-09-12 | 鞍钢股份有限公司 | A kind of high-precision boron-containing steel hot-rolling draught pressure computational methods |
| EP3208673B1 (en) | 2016-02-22 | 2019-06-05 | Primetals Technologies Austria GmbH | In-line calibration of the roller gap of a roller stand |
| CN107153355B (en) * | 2017-05-31 | 2019-12-24 | 西安交通大学 | Dynamic self-adaptive control method for roll gap value of thin slab continuous casting and rolling |
| CN109277414B (en) * | 2018-10-25 | 2020-11-03 | 山西太钢不锈钢股份有限公司 | Rolling control method for hot continuous rolling finishing mill group |
| CN110252827B (en) * | 2019-06-04 | 2021-01-01 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Flexible leveling control method for high-speed strip rolling mill |
| CN110743921B (en) * | 2019-09-27 | 2021-11-30 | 张家港扬子江冷轧板有限公司 | Compensation method for thickness of acid rolling |
| CN111558615B (en) * | 2020-05-18 | 2022-02-25 | 山西太钢不锈钢股份有限公司 | Method for controlling finish rolling pressure of titanium plate on hot continuous rolling line |
| CN114472545B (en) * | 2022-02-15 | 2023-10-31 | 山西太钢不锈钢股份有限公司 | Dynamic control method for loop lifting angle of finishing mill loop |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009285695A (en) * | 2008-05-30 | 2009-12-10 | Jfe Steel Corp | Method of preventing meandering in hot finish rolling and method of manufacturing hot-rolled metal sheet using the same |
| CN101972779A (en) * | 2010-11-05 | 2011-02-16 | 南京钢铁股份有限公司 | Four-roller reversible mill zero position calibrating and roll gap positioning method |
| CN102658293A (en) * | 2012-04-28 | 2012-09-12 | 山西太钢不锈钢股份有限公司 | Method and system of hot continuous rolling |
| CN102941232A (en) * | 2012-11-12 | 2013-02-27 | 东北大学 | Method for controlling hot continuous rolling finish rolling process |
| CN102974625A (en) * | 2012-12-18 | 2013-03-20 | 山西太钢不锈钢股份有限公司 | Rolling pressure compensation method of finish rolling rack |
-
2013
- 2013-09-26 CN CN201310445745.4A patent/CN103506405B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009285695A (en) * | 2008-05-30 | 2009-12-10 | Jfe Steel Corp | Method of preventing meandering in hot finish rolling and method of manufacturing hot-rolled metal sheet using the same |
| CN101972779A (en) * | 2010-11-05 | 2011-02-16 | 南京钢铁股份有限公司 | Four-roller reversible mill zero position calibrating and roll gap positioning method |
| CN102658293A (en) * | 2012-04-28 | 2012-09-12 | 山西太钢不锈钢股份有限公司 | Method and system of hot continuous rolling |
| CN102941232A (en) * | 2012-11-12 | 2013-02-27 | 东北大学 | Method for controlling hot continuous rolling finish rolling process |
| CN102974625A (en) * | 2012-12-18 | 2013-03-20 | 山西太钢不锈钢股份有限公司 | Rolling pressure compensation method of finish rolling rack |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103506405A (en) | 2014-01-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103506405B (en) | The compensation method of the finish rolling roll gap that stainless steel reinforced concrete rolls | |
| CN101670372B (en) | Method for eliminating defect of strip shape of hot-rolled high-strength steel | |
| CN102310089B (en) | Method for eliminating local wear of working roller of CVC (continually variable crown) mill | |
| CN103752610B (en) | A kind of 2250 hot continuous rolling process improving automobile exterior panel steel surface quality | |
| CN106391708B (en) | Rolling method for producing ultrathin strip steel by using cold rolling six-roller single-stand reversible rolling mill | |
| CN105598183B (en) | Hot rolling high-order curve work roll shifting strategy control taking both wave shape and section into consideration | |
| CN109570241B (en) | Wedge-shaped control method with deviation protection | |
| CN102825065B (en) | Rolling method for steel plates of wide and thin specifications | |
| CN107931329B (en) | A kind of control method for improving CSP double fluid and changing specification rolling force model precision | |
| CN101829687B (en) | Method for controlling roll gap of strip steel finishing mill to eliminate influence of specification change | |
| CN102921750B (en) | Method for removing bright trace on surface of strip steel | |
| CN102688898B (en) | Control method for strip shape in rolling of cold-rolling strip steel by two-stand temper mill | |
| US9833823B2 (en) | Method for producing a metal strip | |
| CN101293259A (en) | Method for producing variational format/constant format ultra-thin hot-rolled strip steel by using semi-headless technique | |
| CN101658871A (en) | Optimization method of rolling schedule of non-reversible aluminum strip cold rolling mill | |
| CN103506383B (en) | Super-purity ferrite stainless steel hot rolling making method | |
| CN104942020A (en) | Wear compensation and self-adaption method for hot continuous rolling backup roller | |
| CN102974625B (en) | Rolling pressure compensation method of finish rolling rack | |
| CN111558615B (en) | Method for controlling finish rolling pressure of titanium plate on hot continuous rolling line | |
| CN102233357A (en) | Novel roller matching method | |
| CN110216152B (en) | Control method for improving wedge shape of strip steel rolled in two-phase region | |
| CN106825064B (en) | 1549mm milling train sheet metal finish rolling reduction ratio adjusting methods | |
| CN101704022A (en) | Continuously variable crown roller for controlling plate shape | |
| CN103394524B (en) | A kind of thickness compensation milling method | |
| CN102581028A (en) | Hardness compensation method for controlling band steel hot-rolling molding process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 030003, Shanxi, Taiyuan, pointed lawn area, lawn street, No. 2 Patentee after: Shanxi Taigang Stainless Steel Co.,Ltd. Address before: 030003 No. 2, sharp lawn, Taiyuan City, Shanxi Province Patentee before: Shanxi Taigang Stainless Steel Co.,Ltd. |