CN106065452B - One kind can reduce the netted carbide grade method for distinguishing of bridge Suo Gang - Google Patents
One kind can reduce the netted carbide grade method for distinguishing of bridge Suo Gang Download PDFInfo
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- CN106065452B CN106065452B CN201610534014.0A CN201610534014A CN106065452B CN 106065452 B CN106065452 B CN 106065452B CN 201610534014 A CN201610534014 A CN 201610534014A CN 106065452 B CN106065452 B CN 106065452B
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- 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
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- 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
Abstract
One kind can reduce the netted carbide grade method for distinguishing of bridge Suo Gang：Routine is smelted and tapped；Base is casting continuously to form into 320*420mm~380*460mm blooms；To heating strand；Carry out breaking down cogging；It is rolled into wire rod and is air-cooled to room temperature；Wire rod is heated；Segmentation rolling；Subtract fixed diameter rolling；Spinning；Using stelmor cooling to room temperature.The present invention compared with prior art, can be such that net carbide in bridge rope steel wire rod is down to no more than 0.5 grade, and use intensity can also reduce oven improvement in more than 1960MPa, production cost is reduced at least 15%.
Description
Technical field
The present invention relates to the production technology of hypereutectoid steel, belongs to the production method of bridge wire-rope steel, it is more suitable for by force
Degree can reduce the netted carbide grade method for distinguishing of bridge Suo Gang in more than 1960MPa.
Background technology
With Longspan Bridge first choice bridge type --- the development of the Suo Cheng formula bridges such as cable-stayed bridge, suspension bridge, to bridge cable
With key raw material --- zinc-coated wire proposes higher performance requirement, studies superhigh intensity bridge cable of new generation with zinc-plated
Steel wire reduces production cost, adapts to bridge with super-large span construction needs, it has also become emphasis of concern to save material usage
One of.And the performance indications that net carbide rank is important as bridge Suo Gang, use to bridge Suo Gang user even bridge make
It is all particularly important with safety.When net carbide rank is high, bridge Suo Gang tensile strength, the contraction percentage of area, torsion can be influenceed
Etc. performance, fracture of wire problem will be produced in the drawing stage when serious.So the rank for reducing net carbide in steel is outstanding
To be important, at present typically at 2 grades.
Through retrieval, Chinese Patent Application No. is CN201110103180.2 document, discloses a kind of 1670MPa levels bridge
Cable zinc-coated wire wire rod, it is characterised in that it includes following component by weight percentage：Solvent：C
0.79-0.84%, Si 0.15-1.25%, Mn 0.60-0.90%, Cr 0.15-0.25% and V 0.04-0.15%；It is optional
Component：Al 0.001-0.10%, B 0.0005-0.0015%, Ti 0.01-0.05%, Nb 0.01-0.03% and Mo
Any one in 0.01-0.03% or more than two kinds；And Fe and impurity element.The remnants members included in the impurity element
Element and its percentage by weight should meet：S≤0.012%, P≤0.015%, O≤0.0020%, N≤0.0060%, H≤
0.0002%th, Cu≤0.10% and Ni≤0.10%.Including melting, refining, casting, rolling and the bosher carried out successively
Sequence, and the white slag retention time is taken in refining procedure in more than 15min, refining finishing slag (FeO)+(MnO)≤1.0wt%；Roll
Process processed uses high speed wire rolling technique, and its start rolling temperature is controlled between 1030-1070 DEG C, entry temperature at finishing 940-970
DEG C, laying temperature is 860-910 DEG C；Refrigerating work procedure uses stelmor zonal control cooling technique, and speed is cooled down before phase transformation
Rate ＞ 10K/s, phase transition process control temperature elevation amplitude≤50 DEG C, phase transformation later stage cooldown rate ＜ 3K/s.The melting process
Using electro-smelting technique；The refining procedure uses LF refining；Ti, V and B are if desired added in refining procedure, then should be
Mid-term after the complete deoxidation of LF stoves adds Ti, sequentially adds V and B thereafter, feeds the soft mixing time >=10min of argon gas after silk.It is deposited
Deficiency be：It is high to control cold process control needs, adds operation difficulty, causes qualification rate relatively low, be unfavorable for producing in batches.
Chinese Patent Application No. is CN201210132587.2 document, discloses a kind of 1860MPa levels bridge cable plating
The manufacture method of zinc steel wire wire rod, it comprises the following steps：1) smelt, the chemical component weight percentage of wire rod is：C
0.81-0.90%, Si 0.70-1.60%, Mn 0.60-0.90%, Ni 0.02-1.20%, Al 0.015-0.030%, Ca
0.002-0.006%, P≤0.015%, S≤0.015%, remaining is Fe and inevitable impurity, and the total amount of impurity element is low
In 0.05%；The refining of LF stoves and VD processing are carried out after electric furnace or converter smelting, controls P, S constituent content in steel to be less than
0.015%, the vacuum outgas time need to be more than 20 minutes, while control O content in steel to be less than 15ppm, and N content is less than 35ppm, H
Content is less than 2ppm；Feeding Si-Ca lines carry out inclusions class before tapping, and feed quantity is 2~3m/ ton steel；2) using big
Billet caster pours into square billet, and square billet size is 300~550mm；Protected in casting cycle using argon gas, and control the blank heart
Portion's carbon segregation is less than 1.08；3) roll, become a useful person technique using two fire, the breaking down cogging at a temperature of 1100~1200 DEG C by continuous casting billet
For 150-250mm square billets, square billet is through eddy current inspection, magnetic powder inspection, emery wheel repair a die, supplement magnetic powder inspection and repair a die after, enter
Stove heat is heated, for computer heating control at 950~1100 DEG C, soaking time is 1~2h；Controlled during wire rod high-speed wire rolling
Mill speed is 100~120m/s, and mm finishing mill unit inlet temperature is 920~990 DEG C, reducing-sizing mill inlet temperature is 920~
990 DEG C, laying temperature is 820~960 DEG C；4) rolling wire rod dimensions is Φ 8-14.5mm, passes through adjustment after wire rod rolling
Stelmo line blower fan component controls wire rod structural transformation, optimizes wire rod tissue；The Fans component of stelmo line 14 adjusts model
Enclose for：F1-F8 fan deliveries are 70-100%, and F9-F12 fan deliveries are 65-100%, and F13-F14 fan deliveries are 0-
45%；Sorbite percentage is higher than 95% in wire rod tissue after stelmor cooling.Its shortcoming is due to that center segregation is easily formed
Net carbide tissue is not less than 1.5 grades, it is impossible to meets user's requirement, so as to cause to change the original sentence to, adds production cost.
The content of the invention
It is insufficient existing for new trip technology the invention reside in overcoming, there is provided it is a kind of by reducing center segregation in continuous casting, after
Phase heating technique, and cooling technique, so that net carbide is down to no more than 0.5 grade in bridge rope steel wire rod, use intensity
In more than 1960MPa, production cost, which can reduce at least 15%, can reduce the netted carbide grade method for distinguishing of bridge Suo Gang.
Realize the measure of above-mentioned purpose：
One kind can reduce the netted carbide grade method for distinguishing of bridge Suo Gang, its step：
1）It is by component and weight percent content：C 0.95~1.0%, Si 0.8~1.0%, Mn 0.3~0.6%, P
≤ 0.025%, S≤0.025%, Als 0.025~0.035%, remaining be that Fe and impurity element carry out conventional smelting and tapped；
2）Base is casting continuously to form, therebetween, control：Tundish temperature is 10 ~ 15 DEG C on liquidus curve, and casting speed is in 0.3 ~ 0.5m/
Min, casting blank specification are 320*420mm~380*460mm blooms；And using wick-containing pressure and electromagnetic agitation；
3）To heating strand, and control in heating furnace：One section of temperature is heated at 1000~1020 DEG C, two sections of temperature of heating exist
1220~1250 DEG C, soaking zone temperature is no less than two sections of heating and soaking zone time inside furnace at 1200~1230 DEG C
120min；Air compress pump is 1.1~1.2；Steel billet is in stove total time in 200~220min；Furnace pressure is maintained at positive 26~
28pa, furnace atmosphere O2＜ 1%, CO ＜ 3% weak reducing atmosphere；
4）Breaking down cogging is carried out to the continuous casting billet after heating into the small billet that specification is 185*185mm~210*210mm；
5）Wire rod is rolled into small billet, and controls start rolling temperature at 1095~1115 DEG C, control draught per pass exists
50~65%, after be air-cooled to room temperature；
6）Wire rod is heated, heating and temperature control is at 1080~1130 DEG C, and soaking temperature is at 1050~1100 DEG C, and up and down
The section temperature difference≤20 DEG C；Time inside furnace is in 180~240min；
7）Segmentation rolling is carried out to wire rod, and controlled：At 990~1030 DEG C, entry temperature at finishing exists roughing start rolling temperature
760~800 DEG C；
8）Carry out subtracting fixed diameter rolling, and control into inlet temperature when subtracting sizing at 765~805 DEG C；
9）Spun, control laying temperature is at 780~785 DEG C；
10）Using stelmor cooling to room temperature, control the m/s of cold line roller table speed 40~55 therebetween, at the same by blower fan and
Insulation cover is opened entirely.
The present invention is why during continuous casting, and 10 ~ 15 DEG C on liquidus curve, casting speed exists strict control tundish temperature
0.3 ~ 0.5m/min, composition produces segregation phenomena when being to reduce steel billet solidification.
Why the present invention controls strand in heating furnace：One section of temperature is heated at 1000~1020 DEG C, heats two sections of temperature
1220~1250 DEG C again of degree, soaking zone temperature is no less than two sections of heating and soaking zone time inside furnace at 1200~1230 DEG C
120min；Air compress pump is 1.1~1.2；Steel billet is in stove total time in 200~220min；Furnace pressure is maintained at positive 26~
28pa, furnace atmosphere O2The weak reducing atmospheres of ＜ 1%, CO ＜ 3%, it is therefore intended that reduce strand oxidation and decarbonization and burning under high temperature
Damage；
Why the present invention controls the m/s of control cold line roller table speed 40~55, while blower fan and insulation cover are opened entirely,
It is to shorten the time that steel temperature generates in net carbide, net carbide is not generated so as to reach.
The present invention compared with prior art, can be such that net carbide in bridge rope steel wire rod is down to no more than 0.5 grade, use
Intensity can also reduce oven improvement in more than 1960MPa, production cost is reduced at least 15%.
Brief description of the drawings
Accompanying drawing is the metallographic structure figure of bridge rope steel wire rod produced by the invention.
Embodiment
The present invention is described in detail below：
Embodiment 1
One kind can reduce the netted carbide grade method for distinguishing of bridge Suo Gang, its step：
1）It is by component and weight percent content： C 0.97%、Si 0.83%、Mn 0.47%、P0.013%、S≦
0.008%th, Als 0.0271%, remaining be that Fe and impurity element carry out conventional smelting and tapped；
2）Base is casting continuously to form, therebetween, control：Tundish temperature is 11 DEG C on liquidus curve, and casting speed is in 0.35m/min, strand
Specification is 320*420mm blooms；Between pouring strand, constantly carry out electromagnetic agitation and depressed using wick-containing；
3）To heating strand, and control in heating furnace：One section of temperature is heated at 1000~1005 DEG C, two sections of temperature of heating are again
1220~1225 DEG C, soaking zone temperature is at 1200~1205 DEG C, and two sections of heating and soaking zone time inside furnace are in 123min；Air disappears
Coefficient is consumed 1.1；Steel billet is in stove total time 200min；Stove internal pressure is maintained at 26 positive~26.6Pa, furnace atmosphere O2：
0.94%, CO：2.55% weak reducing atmosphere；
4）Breaking down cogging is carried out to the continuous casting billet after heating into the small billet that specification is 185*185mm；
5）It is rolled into small billet to bloom, for start rolling temperature at 1095~1099 DEG C, draught per pass is rear empty 52%
It is cooled to room temperature；
6）Small billet is heated, heating-up temperature is at 1080~1090 DEG C, and soaking temperature is at 1050~1055 DEG C, upper and lower section
The temperature difference is 15 DEG C；Time inside furnace is 188min；
7）Carry out segmentation rolling to small billet, roughing start rolling temperature at 990~995 DEG C, entry temperature at finishing 760~
767℃；
8）Carry out subtracting fixed diameter rolling, inlet temperature is at 765~770 DEG C when entering to subtract sizing；
9）Spun, control laying temperature is at 780~785 DEG C；
10）Using stelmor cooling to room temperature, cold line roller table speed is in 43 m/s therebetween, while by blower fan and insulation cover
It is complete to open.
After testing, net carbide is 0 grade in the bridge rope steel wire rod produced, intensity 1960MPa；Through statistics, ton disk
It is 16% that bar, which reduces cost rate,.
Embodiment 2
One kind can reduce the netted carbide grade method for distinguishing of bridge Suo Gang, its step：
1）It is by component and weight percent content： C 0.98%、Si 0.91%、Mn 0.33%、P0.012%、S≦
0.005%th, Als 0.031%, remaining be that Fe and impurity element carry out conventional smelting and tapped；
2）Base is casting continuously to form, therebetween, control：Tundish temperature is 10 DEG C on liquidus curve, and casting speed is in 0.4m/min, strand rule
Lattice are 380*460mm blooms；Between pouring strand, constantly carry out electromagnetic agitation and depressed using wick-containing；
3）To heating strand, and control in heating furnace：One section of temperature is heated at 1003~1008 DEG C, two sections of temperature of heating are again
1237~1242 DEG C, soaking zone temperature is at 1216~1221 DEG C, and two sections of heating and soaking zone time inside furnace are in 131min；Air disappears
Coefficient is consumed 1.2；Steel billet is in stove total time in 220min；Stove internal pressure is maintained at 26.5 positive~27.1Pa, furnace atmosphere O2：
0.96%, CO：2.51% weak reducing atmosphere；
4）Breaking down cogging is carried out to the continuous casting billet after heating into the small billet that specification is 210*210mm；
5）It is rolled into small billet to bloom, for start rolling temperature at 1123~1128 DEG C, draught per pass is rear empty 60%
It is cooled to room temperature；
6）Small billet is heated, heating-up temperature is at 1116~1121 DEG C, and soaking temperature is at 1092~1097 DEG C, upper and lower section
The temperature difference is 20 DEG C；Time inside furnace is 207min；
7）Carry out segmentation rolling to small billet, roughing start rolling temperature at 1018~1023 DEG C, entry temperature at finishing 793~
798℃；
8）Carry out subtracting fixed diameter rolling, inlet temperature is at 797~802 DEG C when entering to subtract sizing；
9）Spun, control laying temperature is at 780~785 DEG C；
10）Using stelmor cooling to room temperature, cold line roller table speed is in 42 m/s therebetween, while by blower fan and insulation cover
It is complete to open.
After testing, net carbide is 0 grade in the bridge rope steel wire rod produced, intensity 2000MPa；Through statistics, ton disk
It is 20% that bar, which reduces cost rate,.
Embodiment 3
One kind can reduce the netted carbide grade method for distinguishing of bridge Suo Gang, its step：
1）It is by component and weight percent content： C 0.96%、Si 1.0%、Mn 0.55%、P0.020%、S0.012%、
Als 0.033%, remaining is Fe and impurity element carries out conventional smelting and tapped；
2）Base is casting continuously to form, therebetween, control：Tundish temperature is 10 DEG C on liquidus curve, and casting speed is in 0.5m/min, strand rule
Lattice are 320*420mm blooms；Between pouring strand, constantly carry out electromagnetic agitation and depressed using wick-containing；
3）To heating strand, and control in heating furnace：One section of temperature is heated at 1010~1015 DEG C, two sections of temperature of heating are again
1238~1243 DEG C, soaking zone temperature is at 1222~1227 DEG C, and two sections of heating and soaking zone time inside furnace are in 133min；Air disappears
Coefficient is consumed 1.1；Steel billet is in stove total time in 215min；Stove internal pressure is maintained at 26.8 positive~27.3Pa, furnace atmosphere O2：
0.82%, CO：2.6% weak reducing atmosphere；
4）Breaking down cogging is carried out to the continuous casting billet after heating into the small billet that specification is 185*185mm；
5）It is rolled into wire rod to small billet, start rolling temperature is at 1098~1103 DEG C, and draught per pass is 60%, rear air cooling
To room temperature；
6）Wire rod is heated, heating-up temperature is at 1087~1092 DEG C, and soaking temperature is at 1059~1064 DEG C, upper and lower section temperature
Difference is 18 DEG C；Time inside furnace is 197min；
7）Segmentation rolling is carried out to wire rod, roughing start rolling temperature is at 991~996 DEG C, and entry temperature at finishing is 763~768
℃；
8）Carry out subtracting fixed diameter rolling, inlet temperature is at 768~773 DEG C when entering to subtract sizing；
9）Spun, control laying temperature is at 780~785 DEG C；
10）Using stelmor cooling to room temperature, cold line roller table speed is in 55 m/s therebetween, while by blower fan and insulation cover
It is complete to open.
After testing, net carbide is 0.5 grade in the bridge rope steel wire rod produced, intensity 1960MPa；Through statistics, ton
It is 15% that wire rod, which reduces cost rate,.
Embodiment 4
One kind can reduce the netted carbide grade method for distinguishing of bridge Suo Gang, its step：
1）It is by component and weight percent content： C 0.97%、Si 0.88%、Mn 0.59%、P0.011%、
S0.009%, Als 0.027%, remaining is Fe and impurity element carries out conventional smelting and tapped；
2）Base is casting continuously to form, therebetween, control：Tundish temperature is 15 DEG C on liquidus curve, and casting speed is in 0.3m/min, strand rule
Lattice are 320*420mm blooms；Between pouring strand, constantly carry out electromagnetic agitation and depressed using wick-containing；
3）To heating strand, and control in heating furnace：One section of temperature is heated at 1009~1014 DEG C, two sections of temperature of heating are again
1228~1233 DEG C, soaking zone temperature is at 1211~1216 DEG C, and two sections of heating and soaking zone time inside furnace are in 120min；Air disappears
Coefficient is consumed 1.1；Steel billet is in stove total time in 205min；Stove internal pressure is maintained at 27.6 positive~28Pa, furnace atmosphere O2：
0.92%, CO：2.05% weak reducing atmosphere；
4）Breaking down cogging is carried out to the continuous casting billet after heating into the small billet that specification is 200*200mm；
5）It is rolled into small billet to bloom, for start rolling temperature at 1098~1103 DEG C, draught per pass is rear empty 48%
It is cooled to room temperature；
6）Small billet is heated, heating-up temperature is at 1092~1097 DEG C, and soaking temperature is at 1088~1093 DEG C, upper and lower section
The temperature difference is 17 DEG C；Time inside furnace is 193min；
7）Carry out segmentation rolling to wire rod, roughing start rolling temperature at 1001~1006 DEG C, entry temperature at finishing 792~
797℃；
8）Carry out subtracting fixed diameter rolling, inlet temperature is at 770~775 DEG C when entering to subtract sizing；
9）Spun, control laying temperature is at 780~785 DEG C；
10）Using stelmor cooling to room temperature, cold line roller table speed is in 40 m/s therebetween, while by blower fan and insulation cover
It is complete to open.
After testing, net carbide is 0 grade in the bridge rope steel wire rod produced, intensity 1960MPa；Through statistics, ton disk
It is 18% that bar, which reduces cost rate,.
Embodiment 5
One kind can reduce the netted carbide grade method for distinguishing of bridge Suo Gang, its step：
1）It is by component and weight percent content： C 0.99%、Si 0.83%、Mn 0.41%、P0.013%、
S0.006%, Als 0.029%, remaining is Fe and impurity element carries out conventional smelting and tapped；
2）Base is casting continuously to form, therebetween, control：Tundish temperature is 10 DEG C on liquidus curve, and casting speed is in 0.45m/min, strand
Specification is 380*460mm blooms；Between pouring strand, constantly carry out electromagnetic agitation and depressed using wick-containing；
3）To heating strand, and control in heating furnace：One section of temperature is heated at 1014~1019 DEG C, two sections of temperature of heating are again
1243~1248 DEG C, soaking zone temperature is at 1224~1229 DEG C, and two sections of heating and soaking zone time inside furnace are in 146min；Air disappears
Coefficient is consumed 1.2；Steel billet is in stove total time in 220min；Stove internal pressure is maintained at 27.3 positive~27.7Pa, furnace atmosphere O2：
0.9%, CO：2.2% weak reducing atmosphere；
4）Breaking down cogging is carried out to the continuous casting billet after heating into the small billet that specification is 200*200mm；
5）It is rolled into wire rod to small billet, start rolling temperature is at 1108~1113 DEG C, and draught per pass is 50%, rear air cooling
To room temperature；
6）Wire rod is heated, heating-up temperature is at 1122~1127 DEG C, and soaking temperature is at 1094~1099 DEG C, upper and lower section temperature
Difference is 20 DEG C；Time inside furnace is 238min；
7）Carry out segmentation rolling to wire rod, roughing start rolling temperature at 1019~1024 DEG C, entry temperature at finishing 793~
798℃；
8）Carry out subtracting fixed diameter rolling, inlet temperature is at 798~803 DEG C when entering to subtract sizing；
9）Spun, control laying temperature is at 780~785 DEG C；
10）Using stelmor cooling to room temperature, cold line roller table speed is in 40m/s therebetween, while by blower fan and insulation cover
It is complete to open.
After testing, net carbide is 0 grade in the bridge rope steel wire rod produced, intensity 2000MPa；Through statistics, ton disk
It is 20% that bar, which reduces cost rate,.
Present embodiment is only the best example, not to the restricted implementation of technical solution of the present invention.
Claims (1)
1. one kind can reduce the netted carbide grade method for distinguishing of bridge Suo Gang, its step：
1）It is by component and weight percent content：C 0.95~1.0%, Si 0.8~1.0%, Mn 0.3~0.6%, P≤
0.025%th, S≤0.025%, Als 0.025~0.035%, remaining be that Fe and impurity element carry out conventional smelting and tapped；
2）Base is casting continuously to form, therebetween, control：Tundish temperature is 10 ~ 11 DEG C on liquidus curve, and casting speed is in 0.3 ~ 0.5m/min, casting
Base specification is 320*420mm~380*460mm blooms；And using wick-containing pressure and electromagnetic agitation；
3）To heating strand, and control in heating furnace：One section of temperature is heated at 1000~1020 DEG C, two sections of temperature of heating are 1220
~1250 DEG C, soaking zone temperature makes two sections of heating and soaking zone time inside furnace be no less than 120min at 1200~1230 DEG C；It is empty
Gas consumption coefficient is 1.1~1.2；Steel billet is in stove total time in 200~220min；Furnace pressure is maintained at 26 positive~28pa, in stove
Atmosphere is O2＜ 1%, CO ＜ 3% weak reducing atmosphere；
4）Breaking down cogging is carried out to the continuous casting billet after heating into the small billet that specification is 185*185mm~210*210mm；
5）Wire rod is rolled into small billet, and controls start rolling temperature at 1095~1115 DEG C, control draught per pass 50~
65%, after be air-cooled to room temperature；
6）Wire rod is heated, heating and temperature control is at 1080~1130 DEG C, and soaking temperature is at 1055~1100 DEG C, and upper and lower section
The temperature difference≤20 DEG C；Time inside furnace is in 180~240min；
7）Segmentation rolling is carried out to wire rod, and controlled：Roughing start rolling temperature at 995~1030 DEG C, entry temperature at finishing 760~
800℃；
8）Carry out subtracting fixed diameter rolling, and control into inlet temperature when subtracting sizing at 765~775 DEG C；
9）Spun, control laying temperature is at 780 DEG C；
10）Using stelmor cooling to room temperature, the m/s of cold line roller table speed 40~55 is controlled therebetween, while by blower fan and insulation
Lid is complete to be opened.
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| CN201610534014.0A CN106065452B (en) | 2016-07-08 | 2016-07-08 | One kind can reduce the netted carbide grade method for distinguishing of bridge Suo Gang |
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| CN107227393B (en) * | 2017-06-19 | 2020-04-07 | 武汉钢铁有限公司 | Production method for reducing fatigue crack propagation rate of bainite steel rail |
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| CN112458356B (en) * | 2020-10-15 | 2022-02-01 | 中天钢铁集团有限公司 | Phi 14mm wire rod for 1860MPa bridge cable galvanized steel wire and preparation method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104745925A (en) * | 2015-04-03 | 2015-07-01 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Phi5.3mm 72A wire rod and preparation method thereof |
| CN104789880A (en) * | 2015-03-03 | 2015-07-22 | 张家港联峰钢铁研究所有限公司 | Steel strand wire rod with characteristics of low carbon, high strength and high toughness, and production process thereof |
| CN105063508A (en) * | 2015-08-26 | 2015-11-18 | 武汉钢铁(集团)公司 | Boron-containing high-end cord steel and production method thereof |
| CN105112807A (en) * | 2015-10-08 | 2015-12-02 | 武汉钢铁(集团)公司 | High-strength bridge cable steel with pearlite inter-lamellar spacing smaller than 150nm and production method |
| CN105671443A (en) * | 2016-02-25 | 2016-06-15 | 邢台钢铁有限责任公司 | Hot-rolled wire rod for 1,960MPa-level cable rope galvanized steel wire and production method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101302291B1 (en) * | 2009-06-25 | 2013-09-03 | 신닛테츠스미킨 카부시키카이샤 | HIGH-STRENGTH Zn-Al-PLATED STEEL WIRE FOR BRIDGES WHICH HAS EXCELLENT CORROSION RESISTANCE AND FATIGUE PROPERTIES, AND PROCESS FOR PRODUCTION THEREOF |
-
2016
- 2016-07-08 CN CN201610534014.0A patent/CN106065452B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104789880A (en) * | 2015-03-03 | 2015-07-22 | 张家港联峰钢铁研究所有限公司 | Steel strand wire rod with characteristics of low carbon, high strength and high toughness, and production process thereof |
| CN104745925A (en) * | 2015-04-03 | 2015-07-01 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Phi5.3mm 72A wire rod and preparation method thereof |
| CN105063508A (en) * | 2015-08-26 | 2015-11-18 | 武汉钢铁(集团)公司 | Boron-containing high-end cord steel and production method thereof |
| CN105112807A (en) * | 2015-10-08 | 2015-12-02 | 武汉钢铁(集团)公司 | High-strength bridge cable steel with pearlite inter-lamellar spacing smaller than 150nm and production method |
| CN105671443A (en) * | 2016-02-25 | 2016-06-15 | 邢台钢铁有限责任公司 | Hot-rolled wire rod for 1,960MPa-level cable rope galvanized steel wire and production method |
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