CN104789880B - Steel strand wire rod with characteristics of low carbon, high strength and high toughness, and production process thereof - Google Patents
Steel strand wire rod with characteristics of low carbon, high strength and high toughness, and production process thereof Download PDFInfo
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- CN104789880B CN104789880B CN201510094044.XA CN201510094044A CN104789880B CN 104789880 B CN104789880 B CN 104789880B CN 201510094044 A CN201510094044 A CN 201510094044A CN 104789880 B CN104789880 B CN 104789880B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 68
- 239000010959 steel Substances 0.000 title claims abstract description 68
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title abstract description 4
- 238000001816 cooling Methods 0.000 claims abstract description 38
- 238000005096 rolling process Methods 0.000 claims abstract description 22
- 230000008859 change Effects 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 21
- 238000005516 engineering process Methods 0.000 claims description 15
- 230000009466 transformation Effects 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 229910052796 boron Inorganic materials 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 229910052698 phosphorus Inorganic materials 0.000 claims description 6
- 238000012384 transportation and delivery Methods 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 4
- 238000004513 sizing Methods 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 238000006396 nitration reaction Methods 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims description 2
- 238000009987 spinning Methods 0.000 claims description 2
- 229910000734 martensite Inorganic materials 0.000 abstract description 8
- 230000002159 abnormal effect Effects 0.000 abstract description 5
- 230000009467 reduction Effects 0.000 abstract description 5
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 229910000677 High-carbon steel Inorganic materials 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 3
- 229910001567 cementite Inorganic materials 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 3
- 238000005204 segregation Methods 0.000 description 3
- 241000446313 Lamella Species 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000604 Ferrochrome Inorganic materials 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Abstract
The present invention discloses a steel strand wire rod with characteristics of low carbon, high strength and high toughness, and a production process thereof. The steel strand wire rod comprises, by weight, 0.69-0.75% of C, 0.20-0.30% of Si, 0.60-0.90% of Mn, less than or equal to 0.03% of P, less than or equal to 0.025% of S, 0.30-0.40% of Cr, 0.0010%-0.0020% of B, and the balance of Fe. According to the present invention, during the rolling control and the cooling control in the production process, the silking temperature after rolling, the cooling speed before the silking phase change, the phase change temperature interval, the phase change interval zone speed, the Stelmor roll table speed, the fan wind flow and the like are controlled, such that the product achieves the high strength while the plasticity is not reduced but increased so as to avoid the generation of the network carbide, the martensite and other abnormal structures abd ensure the uniformity of the rod structure and the mechanical property. In addition, the sorbite content of the steel strand wire rod with characteristics of high strength and high toughness of the present invention is not less than 90%, the tensile strength Rm is more than or equal to 1200 MPa, and the reduction of the cross-sectional area Z is more than or equal to 34%.
Description
Technical field
The present invention relates in steel-making enterprise steel strand wires wire rod production field, a kind of more particularly to Low-carbon High Strength high-ductility
Property steel strand wires wire rod and its production technology.
Background technology
Steel strand wires are widely applied to the building trade of various large spans, particularly 1860MPa levels steel strand wires, are making bridge
Cantilever rope, suspension cable, the position such as the overhead arched girder of high-speed railway, stadiums, fully using Important Projects such as national economy
And it is crucial using position, belong to the product of high technology content.
In the 1980-2000 ages, China generally uses the SWRH77B wire rods of day label number, and production intensity is
The steel strand wires of 1720MPa levels or 1670MPa levels, it is with the development and the progress of technology of society, domestic to start to use in 21 century
Specification is raw material for the SWRH82B (abbreviation 82B below) of the Japanese trade mark of 12.5～13.0mm of φ, typically straight through 9 passages
The technique such as strand, stabilizing treatment after formula wire drawing machine drawing, produces 1860MPa level steel strand wires.82B with φ 13.0mm is
Example, user need wire rod intensity for more than 1130MPa, and wire rod there may be the abnormal structure for not affecting to use.Wire rod is through acid
Wash, drawing, strand, stabilizing treatment are fabricated to the steel strand wires of 1860MPa levels.The maximum area that the steel grade is processed in China
It is Tianjin and Yangtze River Delta Area, secondly has a small amount of processing business in middle part.Up-to-standard 82B disks can be produced in the country
There has been the success of steel mill of nearly China of more than 30 family in the producer of bar with enterprises such as Baosteel, Sha Gang, Shoudu Iron and Steel Co, blue or green steel, An Gang as representative
Develop the steel grade.Jiangsu Yong Gang company limiteies develop the steel strand wires wire rod of production 1860MPa levels from July, 2013
SWRH82B, since specification is φ 12.5mm and φ 13.0mm, with good quality deeply by the favorable comment of home and abroad user, to 2014
The wire rod that year has produced the trade mark is nearly 300,000 tons, and quality objection does not almost occur.
The external situation using 82B wire rods is essentially identical with the country, and the processing technique of some producers is even not as Chinese state
Interior working condition.As long as therefore wire rod disclosure satisfy that the production of China, you can meet the use requirement of Foreign User.
The domestic composition general execution day mark C using 82B:0.79-0.86%、Si:0.15-0.35%、Mn:0.60-
0.90%th, P≤0.030%, S≤0.030%；In order to improve wire rod intensity and improve quenching degree, typically adding content again is
The Cr of 0.15-0.25% so that wire rod intensity >=1150MPa, so that meet user's use.Simultaneously 82B wire rods are in order to meet country
The needs of export tax rebate, at home on the basis of component system, increased the B of content >=0.008%.And the country uses C:0.72-
0.75%、Si:0.15-0.35%、Mn:0.60-0.90%, P≤0.030%, S≤0.030%, Cr：0.30-0.40%、B：
0.0010-0.0020%, the wire rod that above element is provided simultaneously with, and wire rod intensity >=1180MPa, belong to pioneering at home.
At the beginning of 2014, Thailand's import policy regulation：The tax for buying conclusion of the business value 30% is imposed to the product containing C >=0.76%
Rate, need to impose antidumping tax to the steel grade wire rod of Jiangsu steel production forever, cause the specification that the steel grade is sent to Thailand to be φ
The SWRH82B wire rods outlet interruption of 8.0mm, φ 9.0mm, φ 11.0mm is this through Yong Gang engineering departments and Thailand client
Consult, determine mutual cooperation exploitation 1860MPa level Low-carbon High Strength high-ductility steel wire rods for steel strands, the trade mark is consulted to be defined as
SWRH72B-S（Hereinafter referred to as 72B-S wire rods）.Therefore the research in terms of SWRH72B-S, has no related open report.
The content of the invention
For above-mentioned problem, present invention aim at provide a kind of control precisely, the outstanding low-carbon (LC) of physical property
High-intensity high-tenacity steel strand wires wire rod and its production technology.
In order to achieve the above object, the technical solution used in the present invention is as follows：A kind of Low-carbon High Strength high-ductility steel twisted wire
With wire rod, the interior each component percentage by weight of described wire rod is as follows：C：0.69%～0.75%, Si：0.20%～0.30%,
Mn：0.60%～0.90%, P≤0.03%, S≤0.025%, Cr：0.30%～0.40%, B：0.0010%～0.0020%, remaining is
Ferrum.
Micro alloying element Cr is carbide former, and it is primarily present in cementite lamella in steel grade, by solid
Molten effect forms alloyed cementite, with reduce perlitic transformation temperature the characteristics of, the pearlite lamella of hypereutectoid steel can be reduced
Spacing, the intensity for improving steel, the effect for mitigating the precipitation for suppressing proeutectoid cementite, crystal grain thinning improves plasticity, while Cr is again
It is typical quenching degree element, the rate of cooling gradient on wire rod surface and center can be reduced so that on cross section, organizes complete
Or essentially identical, while suppress the generation of the high level net carbide at wire rod center.Ferrochrome is compared with other microalloies
Price is relatively low, therefore addition Cr becomes one of major measure of development 82B series wire rods.But higher Cr contents can increase again
Plus the degree of segregation in casting process, the rank of martensite appearance in wire rod is improved, therefore seldom there is weight/mass percentage composition the country
The 82B wire rods that Cr contents are 0.35-0.40% are reached, rarer Cr contents are 0.35-0.40% and phosphorus content is 0.72-0.75%
Product, the wire rod for obtaining 1180MPa intensity produce the wire rod of 1860MPa level steel strand wires.
Boron（B）And the element of hardenability of steel is improved, B is present in two forms in steel grade：Compound state and solid solution state,
It is compound that wherein the boron of compound state is present, and belongs to the impurity of steel grade, and is solid-solubilized in the boron in Fe and is conducive to improving the through hardening of steel
Property, can improve the intensity of steel, and add the B of about 0.0010-0.0015%, it is first that ton steel production cost about increases 2-3, is allusion quotation
The addition element of type, but the element is in larger specification（φ >=10.0mm and more than）When, it is obvious to the intensity increase effect of steel
Less than the wire rod of small dimension.Based on above reason, the present invention is by adding two kinds of alloy units of Cr and B in SWRH72B type wire rods
Element, so that reach the effect of 82B.
A kind of production technology of Low-carbon High Strength high-ductility steel wire rods for steel strands, described production technology are by raw material steel billet
Product steel strand wires wire rod, institute are obtained after heating furnace open rolling → sizing mill finish to gauge → spinning → Water cooling → Phase cooling
The specification of the product stated is 8.0～11.0mm of Φ, and the heating-up temperature of the control in the heating furnace is distributed as：One section 800 of heating
～900 DEG C, 1040～1120 DEG C of two-stage nitration, 1060～1140 DEG C of soaking zone is heated, start rolling temperature is 1040～1060 DEG C, described
Laying temperature is 920～960 DEG C, the Phase cooling of described wire rod Stevr rub roller-way and blower fan synergy under enter
OK.
Present invention optimizes heating furnace heating-up temperature so that Cr fully can be solidly soluted in the austenite of steel billet, be increased
The content of the Cr of solid solution state, ultimately facilitates the intensity for improving wire rod.I is taken charge of on the basis of prior art 82B heating steel billet system
On, bringing-up section and soaking zone temperature, start rolling temperature have been raised into 30～50 DEG C.
The present invention improves laying temperature in technique simultaneously, for mild steel, can reduce the tensile strength of wire rod, and
For high-carbon steel, the raising of laying temperature is conducive to improving the tensile strength of wire rod, by improving the degree of superheat of high-carbon steel,
Increase the inside violent change energy of high-carbon steel, increase the quantity of dislocation so that austenite transformation power increases, and is conducive to improving wire rod
Sorbite percentage, so that improve the intensity of high-carbon steel.
Product of the present invention is carried out in the operating process of Phase cooling in the Stevr roller-way that rubs, when product is in phase transformation
Front cooling rate, in 12～15 DEG C/s, when product is interval in phase transformation, this stage rate of cooling is controlled for this stage rate of cooling control
In 7.0～10.0 DEG C/s, cool down after product is in phase transformation, this stage rate of cooling is controlled in 4～6 DEG C/s.
The rate of cooling of the Phase cooling of wire rod of the present invention is directly proportional to fan delivery.Control wire rod is in Stevr
Rub roller-way phase velocity and blower fan unlatching number of units, it is to avoid the generation of abnormal structure's such as martensite；Adjustment wire rod is in Stevr
Rub roller-way phase velocity and blower fan unlatching number of units and opening ways, open different blower fans, such as：Specification is Φ 11.0mm
Wire rod, it is 100% to return and open front 6 typhoon fan delivery, and the 7th～11 typhoon fan delivery is 90%, the 12nd～13 typhoon fan delivery
For 50% when, wire rod intensity reaches 1200～1240MPa, now no martensite in wire rod；If the 7th～13 opened
When 100%, there is the martensite that ratio is 5～30% at wire rod center, martensite is a diameter of 10～40 μm.
Carry out the unlatching of different fan deliveries simultaneously to the 1st～No. 6 blower fan, when opening 85～90%, wire rod intensity decreases
About 20～40MPa, while the ratio that there are 2.0～4.0 grades of net carbides in wire rod reaches about more than 20%.And open 100%
When, almost there is no the net carbon of 2.0 grades and above rank, while when opening 90% air quantity so that cooling rate reduces about 3～4 before phase transformation
℃/s.Net carbide easily produces cup-and-cone shape drawing fracture in drawing process, and the fracture of wire that martensite causes mainly occurs
In steel wire strand into the steel strand wires stage.
In by the cooling procedure of blower fan, the distribution air quantity of blower fan is single wire rod of the present invention：Wire rod leading portion
20%, wire rod stage casing 60%, wire rod rear 20%.The distribution air quantity of control blower fan, is conducive to the cooling speed of the different parts of wire rod
Degree, obtains more uniform poor with circle, it is ensured that the stability of steel strand wires.During production 82B, the reasonable distribution of air quantity is leading portion
40%, stage casing 20% and back segment 40%, and when producing this product, using wire rod leading portion 20%, wire rod stage casing 60%, wire rod rear
20% mode, now same circle poor performance of the invention can be with controlled rolling within 30～35MPa, and the same circle difference of 82B is only capable of controlled rolling
In 40～50MPa or so.
Wire rod of the present invention is carried out in the operating process of Water cooling, and the specific water in equipment is 0.5～0.6L/
min；On conticaster during smelting 82 B steel billet, using strong cold mode, specific water is 1.25-1.30L/min to secondary cooling water, strand segregation
The ratio of index >=1.10 is more than 30%, and the steel grade in contrast test, the present invention finally determines the mode of weak cold,
Specific water is 0.5～0.6L/min, and the ratio of strand segregation index >=1.10 is less than 10%.
In the operating process for comparing cooling of the present invention, before described phase transformation the air quantity of the blower fan of cooling rate section not with
The change of temperature and change, it is described to compare segment with the air quantity of the blower fan for comparing rear cooling section as the rising of temperature is in just
Than；Due to impact of the temperature to rate of cooling, it is to keep identical product quality, we are cold according to season differentiation to controlled rolling, control
Use, winter controls cold mode compared with summer, open the blower fan and air quantity of different number of units.
It is an advantage of the current invention that：The present invention by with relatively low phosphorus content and certain microalloy element, obtain with
The mechanical property of SWRH82B same specifications, while ensureing that wire rod has identical tensile strength, moreover it is possible to improve the toughness of wire rod
Index, obtains the wire rod with preferable obdurability, by adjusting controlled rolling, controlling cold technique, makes wire rod have the tissue for being adapted to drawing,
Avoid the state of the abnormal structures such as the easy net carbon for occurring of 82B wire rods, martensite so that the elongation percentage and reduction of area of wire rod is all
Make moderate progress, the toughness index of the final 1860MPa level steel strand wires for causing to make is improved.
While ensureing to obtain high intensity, plasticity do not reduce increasing on the contrary, it is to avoid net carbide and horse
The generation of Shi Tideng abnormal structures, it is ensured that the uniformity of poker microstructure and mechanical property.The SWRH72B-S of the present invention is high-strength
Degree, the sorbite percentage of high tenacity wire rod are not less than 90%, and tensile strength Rm >=1200MPa, contraction percentage of area Z >=34% are simple
Yan Zhi, the controlled rolling of this component system enforcement, the cold technique of control can improve the intensity of wire rod and ensure poker microstructure and mechanical property
Uniformity, realizes and stably produces.
Specific embodiment
With reference to specific embodiment, the present invention is described in further detail.
Embodiment 1：In summer, summer technique productions are adopted for specification Φ 11.0mm, the operation of the steel grade in the present invention
Technique is as follows：
1) start rolling temperature is controlled at 1040-1060 DEG C, is entered finish rolling, is entered the controlled rolling of reducing sizing mill temperature from 900-930 DEG C, is spun
Temperature control is at 930-960 DEG C；
2) composition and control cold technique such as following table institute of the Φ 11.0mm product batch numbers for the SWRH72B-S of X5140811229
Show：
Chemical composition content：
Control cold technique：
Properties of product：The mechanical property of the product Φ 11.0mm SWRH72B-S for finally giving is as follows：
Embodiment 2：In the winter time, Low-carbon High Strength high tenacity SWRH72B-S production technology, comprises the following steps：
1）Start rolling temperature is controlled at 1040-1060 DEG C, is entered finish rolling, is entered the controlled rolling of reducing sizing mill temperature from 900-930 DEG C, is spun
Temperature control is at 930-960 DEG C；
2）Φ 8.0mm product batch numbers are：The composition of the SWRH72B-S of X6141201729 and the cold technique such as following table institute of control
Show：
Chemical composition content：
Control cold technique：
Properties of product：The mechanical property such as table of Φ 8.0mm SWRH72B-S:
Lifted situation explanation in the present invention, product has reached the technical specification with user's negotiation, using the component system
Afterwards, while ensureing that wire rod reaches the tensile strength of SWRH82B, the elongation percentage and reduction of area of SWRH72B-S wire rods compare
SWRH82B is greatly improved, and the elongation percentage of SWRH82B wire rods is typically extremely difficult to >=more than 10%, typically in 7-8% or so, has
Effect solves the problems, such as that SWRH82B wire rod elongation percentage is low, and the obdurability for having reached steel strand wires is effectively matched
Feed back with using for Thailand user through the test of some months, the specification of exploitation is high for the low-carbon (LC) of φ 8.0-11.0mm
Strength high toughness SWRH72B-S wire rods disclosure satisfy that its needs, and reduce the purchase cost of Thailand client, from exploitation so far,
3642.14 tons have been produced, mass production capabilities have been had been provided with now.According to the meaning that Yong Gang international trades company and client reach
To the every month from after in December, 2014 produces order all in 4000-5000 tons or so.
Embodiment 3：The SWRH72B-S types wire rod of present invention production is carried out with existing SWRH82B types wire rod on the market
Contrast test, the result for drawing are as shown in the table：
Corresponding wire rod mechanical performance index is as shown in the table：
The steel strand wires performance that wire rod is processed into is as shown in the table：
Therefore deduce that：72B-S newly developed substitutes 82B wire rods, 0.10% by the constituent reduction of steel billet, while protect
Hold that the alloying components such as Si, Mn are constant, by reducing the toughness that C content improves wire rod toughness and then improves steel strand wires so that disk
While bar and steel strand wires change into raising intensity by the mode of original reduction toughness, raising intensity, toughness of products is improved.
Due to the adjustment of composition, 0.10% C is reduced, the impact for reducing wire rod intensity is far longer than Cr pair of raising 0.10%
The impact that wire rod intensity is improved, therefore have adjusted steel rolling controlled rolling, control cold technological parameter, by controlled rolling, the adjustment of the cold technique of control, carry
The mode of sorbite percentage in high wire rod tissue, makes up Cr to the not enough loss of intensity.
Embodiment 4：Due to impact of the temperature to rate of cooling, it is to keep identical product quality, we are cold to controlled rolling, control
Distinguish according to season and use, winter controls cold mode compared with summer, wherein summer temperature >=10 DEG C, winter temperature≤9 DEG C are opened
The blower fan and air quantity of different number of units, finally to ensure the cooldown rate of Phase cooling operation, its contrast test is as shown in the table：
It should be noted that it is above-mentioned be only presently preferred embodiments of the present invention, not for limit the present invention protection model
Enclose, on the basis of above-described embodiment, done equivalents belong to protection scope of the present invention.
Claims (5)
1. a kind of production technology of Low-carbon High Strength high-ductility steel wire rods for steel strands, it is characterised in that each in described wire rod
Weight percentages of components is as follows：C：0.69%～0.75%, Si：0.20%～0.30%, Mn：0.60%～0.90%, P≤0.03%, S
≤0.025%、Cr：0.30%～0.40%, B：0.0010%～0.0020%, remaining is ferrum；
Described production technology is through heating furnace open rolling → sizing mill finish to gauge → spinning → Water cooling → phase by raw material steel billet
Product steel strand wires wire rod is obtained after becoming cooling, and the specification of described product is control in 8.0～11.0mm of Φ, the heating furnace
Heating-up temperature be distributed as：One section 800～900 DEG C of heating, 1040～1120 DEG C of two-stage nitration of heating, 1060～1140 DEG C of soaking zone,
Start rolling temperature is 1040～1060 DEG C, and described laying temperature is 920～960 DEG C, and the Phase cooling of described wire rod is safe at this
You rub roller-way and blower fan synergy under carry out；Described product carries out the operating process of Phase cooling in the Stevr roller-way that rubs
In, when product is in cooling rate before phase transformation, this stage rate of cooling is controlled in 12～15 DEG C/s, when product is interval in phase transformation,
This stage rate of cooling control is cooled down after product is in phase transformation in 7.0～10.0 DEG C/s, and this stage rate of cooling is controlled 4
～6 DEG C/s.
2. the production technology of Low-carbon High Strength high-ductility steel wire rods for steel strands as claimed in claim 1, it is characterised in that described
The rate of cooling of Phase cooling of wire rod be directly proportional to fan delivery.
3. the production technology of Low-carbon High Strength high-ductility steel wire rods for steel strands as claimed in claim 1, it is characterised in that described
Single wire rod in by the cooling procedure of blower fan, the distribution air quantity of blower fan is：Wire rod leading portion 20%, wire rod stage casing 60%, disk
Bar rear 20%.
4. the production technology of Low-carbon High Strength high-ductility steel wire rods for steel strands as claimed in claim 1, it is characterised in that described
Wire rod carry out in the operating process of Water cooling, the specific water in equipment be 0.5～0.6L/min.
5. the production technology of Low-carbon High Strength high-ductility steel wire rods for steel strands as claimed in claim 2, it is characterised in that described
Phase cooling operating process in, before described phase transformation, the air quantity of the blower fan of cooling rate section does not change with the change of temperature,
After described phase transformation segment and phase transformation the air quantity of the blower fan of cooling section with the rising of temperature it is proportional.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510094044.XA CN104789880B (en) | 2015-03-03 | 2015-03-03 | Steel strand wire rod with characteristics of low carbon, high strength and high toughness, and production process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510094044.XA CN104789880B (en) | 2015-03-03 | 2015-03-03 | Steel strand wire rod with characteristics of low carbon, high strength and high toughness, and production process thereof |
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| CN106065452B (en) * | 2016-07-08 | 2017-12-05 | 武汉钢铁有限公司 | One kind can reduce the netted carbide grade method for distinguishing of bridge Suo Gang |
| CN106734191A (en) * | 2016-12-26 | 2017-05-31 | 江苏省沙钢钢铁研究院有限公司 | It is a kind of to reduce the rolling mill practice that low-carbon boron-containing steel wire rod returns useless rate |
| CN111020146A (en) * | 2019-12-27 | 2020-04-17 | 新疆八一钢铁股份有限公司 | Steel rolling heating method for controlling 82B net carbon |
| CN111690877A (en) * | 2020-06-30 | 2020-09-22 | 张家港联峰钢铁研究所有限公司 | Production method of hot-rolled wire rod for ultra-low carbon steel fiber |
| 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 |
| CN112359277B (en) * | 2020-10-15 | 2021-12-17 | 中天钢铁集团有限公司 | Control method for segregation and net carbon of 86-level high-strength cord steel wire rod |
| CN112239803A (en) * | 2020-10-15 | 2021-01-19 | 中天钢铁集团有限公司 | Controlled rolling and controlled cooling method for reducing martensite in high alloy steel hot-rolled wire rod microstructure |
| CN113462869B (en) * | 2021-07-22 | 2022-11-22 | 南京宝日钢丝制品有限公司 | Treatment method of heat-resistant alloy cold-heading steel wire |
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| JPS58174551A (en) * | 1982-04-03 | 1983-10-13 | Sumitomo Electric Ind Ltd | Steel containing boron and manufacture thereof |
| CN1840729A (en) * | 2005-03-30 | 2006-10-04 | 株式会社神户制钢所 | High carbon steel wires excellent in spinnability and method for producing same |
| CN101649416B (en) * | 2009-09-04 | 2011-05-25 | 江苏省沙钢钢铁研究院有限公司 | High carbon steel wire rod and preparation method thereof |
| CN102181786A (en) * | 2011-04-25 | 2011-09-14 | 江苏省沙钢钢铁研究院有限公司 | Coil rod used for 1670MPa level bridge cable zinc-coated wire and preparation method of coil rod |
| CN102796950A (en) * | 2012-08-08 | 2012-11-28 | 内蒙古包钢钢联股份有限公司 | Production method of large-scale high strength 82B high-carbon hard wire rod |
| CN102876983B (en) * | 2012-09-29 | 2014-05-21 | 攀钢集团成都钢钒有限公司 | Production process for 82B wire rod used for high strength prestressed steel wire and wire rod thereof |
| CN103243266A (en) * | 2013-04-26 | 2013-08-14 | 内蒙古包钢钢联股份有限公司 | Production method of export high-strength steel wire rod |
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Effective date of registration: 20231117 Address after: Yonglian, Nanfeng Town, Zhangjiagang City, Suzhou City, Jiangsu Province Patentee after: JIANGSU YONGGANG GROUP Co.,Ltd. Address before: 215600 Zhangjiagang Lianfeng Iron and Steel Research Institute Co., Ltd., Yonglian Village, Nanfeng Town, Zhangjiagang City, Suzhou City, Jiangsu Province Patentee before: ZHANGJIAGANG LIANFENG STEEL INSTITUTE Co.,Ltd. |