CN114134410A - 一种适于深度拉拔的帘线钢盘条及其制造方法 - Google Patents
一种适于深度拉拔的帘线钢盘条及其制造方法 Download PDFInfo
- Publication number
- CN114134410A CN114134410A CN202111171327.1A CN202111171327A CN114134410A CN 114134410 A CN114134410 A CN 114134410A CN 202111171327 A CN202111171327 A CN 202111171327A CN 114134410 A CN114134410 A CN 114134410A
- Authority
- CN
- China
- Prior art keywords
- wire rod
- pearlite
- grade
- deep drawing
- steel wire
- 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.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 57
- 239000010959 steel Substances 0.000 title claims abstract description 57
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 229910001562 pearlite Inorganic materials 0.000 claims abstract description 31
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 24
- 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 claims abstract description 23
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 21
- 230000008859 change Effects 0.000 claims abstract description 19
- 238000005204 segregation Methods 0.000 claims abstract description 17
- 230000008569 process Effects 0.000 claims abstract description 12
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 10
- 229910001567 cementite Inorganic materials 0.000 claims abstract description 5
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000011156 evaluation Methods 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims description 26
- 230000009467 reduction Effects 0.000 claims description 15
- 238000009749 continuous casting Methods 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 11
- 238000004321 preservation Methods 0.000 claims description 10
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 9
- 230000003647 oxidation Effects 0.000 claims description 9
- 238000007254 oxidation reaction Methods 0.000 claims description 9
- 238000005096 rolling process Methods 0.000 claims description 9
- 238000003723 Smelting Methods 0.000 claims description 8
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000009987 spinning Methods 0.000 claims description 8
- 238000005266 casting Methods 0.000 claims description 7
- 238000007711 solidification Methods 0.000 claims description 6
- 230000008023 solidification Effects 0.000 claims description 6
- 229910001566 austenite Inorganic materials 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 238000007670 refining Methods 0.000 claims description 4
- 229910000677 High-carbon steel Inorganic materials 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 2
- 230000006911 nucleation Effects 0.000 claims description 2
- 238000010899 nucleation Methods 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 230000008719 thickening Effects 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims 3
- 238000009849 vacuum degassing Methods 0.000 claims 1
- 238000010583 slow cooling Methods 0.000 abstract description 6
- 229910000975 Carbon steel Inorganic materials 0.000 abstract 1
- 239000010962 carbon steel Substances 0.000 abstract 1
- 230000009466 transformation Effects 0.000 description 5
- 241000446313 Lamella Species 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 238000005728 strengthening Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000005491 wire drawing Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Images
Classifications
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/02—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
- B21B1/04—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing in a continuous process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
-
- 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
- B22D11/005—Continuous casting of metals, i.e. casting in indefinite lengths of wire
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/0007—Reinforcements made of metallic elements, e.g. cords, yarns, filaments or fibres made from metal
-
- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/02—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
- B21B2001/022—Blooms or billets
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/009—Pearlite
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Metal Rolling (AREA)
- Continuous Casting (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
本发明涉及一种适于深度拉拔的帘线钢盘条及其制造方法,盘条金相组织为索氏体+珠光体+铁素体,其中索氏体比例控制在60~70%,珠光体比例为30~40%,铁素体作为少量存在的组织,比例≤10%。珠光体片层厚度在0.10~0.35mm,珠光体团尺寸10~20um,该珠光体特征对应更小的位错密度。中心碳偏析级别按照YB/T 4413《高碳钢盘条中心碳偏析金相评定方法》评价,≤1级,组织中网状渗碳体级别≤1级。本发明的控冷方法尤其是控冷工艺中的慢冷进行相变以及之后的加罩缓冷可以显著改变索氏体组织含量、珠光体片层距,从而控制盘条抗拉强度σ在(103762*Ceq~114606*Ceq)MPa,面缩在38%以上,更适于深度拉拔。
Description
技术领域
本发明属于冶金技术领域,具体涉及一种帘线钢盘条及其制造方法。
背景技术
汽车轻量化快速发展以及新能源汽车的迅速崛起,使得汽车轮胎骨架用钢帘线的强度要求逐步提高。钢帘线的强度等级也逐步从最初的普通强度(NT)级普通强度发展到目前的超高强度(ST)级超高强度和极高强度(UT)级特高强度级别。
钢丝的强度越高要求拉拔后的直径越细,结构越复杂,因而对于帘线钢用盘条,合理控制钢中的夹杂物,主要为MnS以及可变形的40%SiO2+15%Al2O3+20%CaO复合夹杂物等可变形夹杂物,将有助于提高盘条的拉拔性能。另外,盘条组织中索氏体组织的比例也会影响盘条的拉拔性能,一般地,盘条在冷却至600-650温度范围内发生等温转变,转变组织为索氏体,对于高碳钢盘条而言,索氏体比例一般在85%以上,索氏体过高,珠光体片层细,会使盘条抗拉强度过高,位错密度大,拉拔硬化加大,不利于深度拉拔;索氏体比例过低,盘条强度低,塑性差,盘条拉拔变形能力差,同样不适于深度拉拔。所以,只有将盘条中索氏体的比例、抗拉强度控制在合适的范围内才能够满足盘条深度拉拔低断丝率的要求,进一步推进钢帘线往高强化、精细化方向发展。
通过对以上技术问题的解决能够实现4000MPa以上UT级钢帘线和切割钢丝用盘条的生产普及化。
发明内容
本发明的目的在于提供一种适于深度拉拔的帘线钢盘条,意预降低盘条组织中索氏体的比例。所述盘条的金相组织为索氏体+珠光体+铁素体,其中索氏体比例控制在60~70%,珠光体比例为30~40%,铁素体作为少量存在的组织,比例≤10%。盘条中各组织的比例是指盘条金相组织图(例如SEM放大图)中各组织的面积占比。
进一步地,本申请意预获得片层更厚的珠光体组织,珠光体片层厚度在0.10~0.35mm,珠光体团尺寸10~20um,减少金相组织的位错密度,以避免抗拉强度过大,抑制拉拔硬化。
进一步地,本申请意预对盘条的中心碳偏析级别进行控制,按照YB/T 4413《高碳钢盘条中心碳偏析金相评定方法》评价,本发明盘条的中心碳偏析级别≤1级,从而能够有效抑制盘条冷却过程中网状渗碳体析出,组织中网状渗碳体级别≤1级,本申请为0级。
进一步地,盘条表面氧化皮厚度13~18um,比现有平均氧化层厚度厚了5um,氧化皮中FeO/Fe3O4=2~2.5:1,FeO/Fe3O4更低,更容易达到理想的(机械)除鳞效果,有助于显著降低盘条拉拔断丝率。
本发明盘条的抗拉强度σ在(103762*Ceq~114606*Ceq)MPa,式中碳当量Ceq=C+Mn/6+Cr/5,式中元素符号代表钢中该元素的重量百分含量,强度适中,更适于深度拉拔,显著降低断丝率。现有技术生产的盘条抗拉强度范围σ=(120387*Ceq~131231*Ceq)MPa,抗拉强度主要由两个因素决定:一是化学成分,即碳当量;二是冷却时的冷却强度、盘条的相变温度,冷却强度小相变温度高,盘条强度低;冷却强度大相变温度低,盘条强度高。本申请主要通过控制冷却强度来防止抗拉强度过高。
盘条的化学成分按照质量百分比计为:C:0.70-0.99%,Si:0.15-0.30%,Mn:0.15-0.60%,Cr:0.01-0.50%,余量为Fe及不可避免的杂质元素。强度涉及72级、82级、86级、92级帘线钢。
本申请盘条中化学元素的作用原理如下:
C是高碳硬线钢中的主要强化元素,通过固溶强化和析出强化提高钢的强度,随着碳含量的增加,盘条强度提升,拉拔钢丝的强度也随着提升。但是过共析钢中随着碳含量的增加,盘条心部网状渗碳体析出的概率也随之增加。因此本发明C含量范围设定在0.78-0.99%。
Si是帘线钢中的主要脱氧元素,通过Si脱氧生成无害化的SiO2夹杂物。但Si同时也是强化铁素体的元素,帘线钢中过高的Si含量会造成珠光体中的铁素体相塑性降低,钢丝拉拔延展性变差,因此本发明Si含量控制在0.15-0.30%。
Mn在帘线钢中既可以脱氧形成可变形的MnS夹杂物,同时又是钢中主要提升强度的元素。但Mn同时也是易偏析元素,过高的Mn使钢材偏析加重,同时会提高钢的淬透性,增加奥氏体冷却时的过冷度,使珠光体片层变细,强度提高,塑性变差。因此本发明Mn含量控制在0.15-0.60%。
Cr在帘线钢中能够促进C曲线右下移动,推迟索氏体相变时间、降低相变温度,可以细化珠光体片层间距,能够显著改善钢材的塑性指标,显著改善拉拔加工性能,实现大的拉拔变形,减少中间热处理,提高拉拔钢丝的最终强度。但帘线钢中Cr含量过高容易在冷却过程中形成过冷组织贝氏体、马氏体,塑性变形差,影响钢材的拉拔加工性能,本发明优选Cr控制在0.35%以下。
本申请另外还要提供帘线钢盘条的制造方法,具体生产工艺流程:包括依次进行的KR铁水预处理、转炉冶炼、LF精炼、方坯连铸、方坯加热轧制、盘条冷却。
其中:
冶炼符合成份设计的钢水,采用连铸工艺将钢水连铸成小方坯,中间包过热度控制在15-30℃,配备有电磁搅拌装备,凝固末端采用动态轻压下设备,拉矫机各区压力辊采用位移压下模式,具体1#-6#辊位移压下量分别为2mm,2mm,3mm,4mm,4mm,4mm。与常规连铸坯碳偏析控制主要采用轻压下技术方相比,本申请动态压下采用“轻压下+重压下”组合压下技术,在铸坯凝固初期采用轻压下,凝固后期采用重压下。连铸坯碳偏析指数≤1.05,其中连铸坯碳偏析指数=连铸坯心部C%/熔炼C%。
坯料轧制选择合适的加热温度,具体轧制前加热炉内高温段温度1180℃以上,总加热时间120min以上,高温时间60min以上,保证铸坯有足够温度和时间扩散。通过高温扩散进一步抑制心部碳偏析。
盘条终轧温度控制在800-900℃,轧制速度设定95~120m/s,吐丝温度850~950℃。
吐丝后的盘条线圈在风冷辊道上控冷,辊道速度范围为0.95-1.05m/s,从0.95m/s开始递增。开启1-3#风机加快盘条的初始冷却速率,促使盘条从吐丝温度快速冷却至700℃以下,促进细化珠光体团尺寸,抑制网碳析出,此阶段会有少量铁素体析出;快冷阶段冷却速度控制在15-20℃/s为佳,根据环境温度调整风机风量开启度,具体环境温度20℃以上,1-3#风机开启度分别为90%、90%,70%。具体环境温度20℃以下,1-3#风机开启度分别为90%、90%,50%。之后的风机(3#后的其余风机)全部关闭,关闭主要是充分慢冷,盘条进入相变区,由奥氏体向索氏体和珠光体转变,提高索氏体相变温度,实现索氏体在650℃左右相变,同时延长相变时间、实现等温转变。相变过程中相变潜热的释放会让盘条温度有一个回升随着相变的完成盘条温度会重新下降,待盘条温度下降到570℃以下后相变基本结束,之后对盘条线圈设置保温罩进行缓冷,促进盘条表面的氧化层增厚,氧化层中FeO进一步转变为Fe3O4,降低FeO/Fe3O4。
对于风冷辊道上的保温罩设置:1-11#保温罩对应快冷和相变区间,盘条在这两个冷却区间对应的风冷辊道上不设置保温罩,12#以后的保温罩全部关闭,保证盘条在570℃左右充分保温,充分缓冷,增加氧化皮厚度,调节氧化层的成分使更有利于盘条除鳞,降低拉拔断丝率。
与现有技术相比,本发明的优点在于:
(1)本发明生产的盘条,珠光体片层粗、珠光体团尺寸小,能够适应盘条的深入拉拔,减少钢丝在大减面率拉拔条件下的裂纹发生倾向,有效降低断丝率,断丝率比正常工艺降低30%。
(2)盘条中C:0.70-0.99%,属于高碳盘条钢,而高碳盘条钢的索氏体比例一般在85%以上,本申请的盘条制造方法尤其是方法中的控冷工艺将盘条中的索氏体比例控制在了60-70%,粗片状珠光体比例在30-40%。通过粗化片层有效降低盘条抗拉强度,一方面在粗拉拔阶段可以减少磨具损耗和钢丝表面发热,降低了表面缺陷风险,从而降低拉拔断丝率。另一方面就深拉拔而言,珠光体片层过细,钢丝在拉拔过程中面缩下降时的真应变变小,即钢丝能保持稳定塑性可承受的拉拔减面量减小,即钢丝可深度拉拔性能降低。
(3)本发明生产的盘条,氧化层厚度在13-18um比正常工艺厚5um,并且氧化层组成FeO/Fe3O4=(2~2.5)/1,更有利于盘条机械除鳞,减小盘条除鳞不净对表面的拉拔损失,影响钢丝拉拔断丝率。
附图说明
图1为本发明实施例1盘条的显微组织图;
图2为本发明实施例2盘条的氧化层示意图。
具体实施方式
以下结合具体实施例对本发明作进一步详细描述。
以熔炼100吨钢水制造帘线钢盘条为例,采用铁水预处理+转炉冶炼+LF精炼+连铸成方坯的流程生产出下列成分的各实施例的铸坯,连铸坯碳偏析指数满足≤1.05。
连铸方坯入炉加热,确保均热温度在1180℃以上,并且1180℃以上高温时间保持4小时以上,确保铸坯充分加热扩散,进一步降低碳偏析。在奥氏体相区将连铸方坯连轧成盘条,盘条终轧温度控制在800-900℃,轧制速度设定95~120m/s,吐丝温度控制在900-950℃,提高吐丝温度增加奥氏体稳定性,吐丝后盘条线圈的冷却采用快冷+慢冷+保温。盘条线圈所在的辊道速度设定0.95m/s,辊道速度逐渐增加到1.05m/s以此拉开线圈间距。开启1-3#风机实现快冷,加快珠光体形核,抑制珠光体长大,风机开启度为90%,90%,30%;3#之后的风机关闭进行慢冷,盘条进入相变区间,盘条在环境温度和自身潜热释放的条件下相变,提高了相变温度,650℃左右,延长索氏体相变时间,待盘条温度出现下降并下降至570℃以下后认为相变完成,此时对应关闭12#后保温罩对相变后的盘条保温,促进盘条表面部分FeO层转变成Fe3O4,此设置一般可以将盘条表面FeO厚度/Fe3O4厚度调节至(2~2.5)/1,盘条除鳞效果更好,降低表面缺陷和拉拔时的断丝率。
实施例1-5涉及盘条的元素成分和铸坯偏析指数参见表1。
表1
实施例1-5和两个对比例具体的工艺参数参见表2。
表2
实施例1-5和两个对比例最终盘条的检测性能见表3。
表3
通过以上实施例和对比例的对比,可以证明:采用本申请的控冷方法,尤其是控冷工艺中的慢冷进行相变以及之后的加罩缓冷,可以显著改变索氏体组织含量、珠光体片层距,从而控制盘条抗拉强度,满足抗拉强度σ在(103762*Ceq~114606*Ceq)MPa,改善拉拔性能。
尽管以上详细地描述了本发明的优选实施例,但是应该清楚地理解,对于本领域的技术人员来说,本发明可以有各种更改和变化。凡在本发明的精神和原则之内所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (13)
1.一种适于深度拉拔的帘线钢盘条,其特征在于:所述盘条的金相组织为索氏体+珠光体+铁素体,其中索氏体比例控制在60~70%,珠光体比例为30~40%,铁素体作为少量存在的组织,比例≤10%。
2.根据权利要求1所述的适于深度拉拔的帘线钢盘条,其特征在于:珠光体片层厚度在0.10~0.35mm,珠光体团尺寸10~20um,该珠光体特征对应更小的位错密度。
3.根据权利要求1所述的适于深度拉拔的帘线钢盘条,其特征在于:盘条的中心碳偏析级别按照YB/T 4413《高碳钢盘条中心碳偏析金相评定方法》评价,≤1级,组织中网状渗碳体级别≤1级。
4.根据权利要求1所述的适于深度拉拔的帘线钢盘条,其特征在于:盘条的抗拉强度σ在(103762*Ceq~114606*Ceq)MPa,式中碳当量Ceq=C+Mn/6+Cr/5,式中元素符号代表盘条中该元素的重量百分含量。
5.根据权利要求1所述的适于深度拉拔的帘线钢盘条,其特征在于:盘条表面氧化层厚度为13~18um,氧化层中FeO/Fe3O4=2~2.5:1,具有更好的除鳞效果。
6.根据权利要求1所述的适于深度拉拔的帘线钢盘条,其特征在于:盘条的面缩率≥38%。
7.根据权利要求1所述的适于深度拉拔的帘线钢盘条,其特征在于:所述盘条的化学成分按照质量百分比计为:C:0.70-0.99%,Si:0.15-0.30%,Mn:0.15-0.60%,Cr:0.01-0.50%,余量为Fe及不可避免的杂质元素。
8.根据权利要求7所述的适于深度拉拔的帘线钢盘条,其特征在于:所述盘条强度涉及72级、82级、86级、92级帘线钢。
9.一种适于深度拉拔的帘线钢盘条的制造方法,其特征在于:是将冶炼后的钢水浇铸成方坯,所述方坯的碳偏析指数≤1.05,碳偏析指数=方坯心部C%/熔炼C%;
将方坯加热,高温段温度要在1180℃以上,高温段保持时间60min以上,然后将方坯轧制成连续的盘条,终轧温度800-900℃,吐丝温度850~950℃;
吐丝后的盘条线圈在风冷辊道上进行控冷:开启风机以15-20℃/s的冷却速度将盘条从吐丝温度快速冷却至700℃以下,此阶段会产生少量铁素体,并促进珠光体形核数量;接着盘条进入相变区,关闭风机,盘条在室温条件下由奥氏体向索氏体和珠光体转变;待盘条温度下降至570℃以下,为盘条线圈设置保温罩,让完成索氏体转变的盘条在保温罩内充分缓冷,促进氧化层增厚,氧化层中FeO进一步转变到Fe3O4。
10.根据权利要求9所述的方法,其特征在于:钢水的冶炼涉及KR铁水预处理、转炉冶炼、LF精炼,LF精炼后不进行真空脱气而直接浇铸成方坯。
11.根据权利要求9所述的方法,其特征在于:采用连铸工艺将钢水浇铸成方坯,中间包过热度控制在15-30℃,配备有电磁搅拌装备,凝固末端采用动态轻压下设备,且在铸坯凝固初期采用轻压下,凝固后期采用重压下。
12.根据权利要求11所述的方法,其特征在于:所述动态轻压下设备是指拉矫机各区压力辊采用位移压下模式,其中1#-6#压力辊位移压下量分别为2mm,2mm,3mm,4mm,4mm,4mm。
13.根据权利要求9所述的方法,其特征在于:风冷辊道速度为0.95-1.05m/s,从0.95m/s开始递增,使盘条线圈间距逐渐增大。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111171327.1A CN114134410A (zh) | 2021-10-08 | 2021-10-08 | 一种适于深度拉拔的帘线钢盘条及其制造方法 |
PCT/CN2021/123778 WO2023056658A1 (zh) | 2021-10-08 | 2021-10-14 | 一种适于深度拉拔的帘线钢盘条及其制造方法 |
KR1020237009103A KR20230051564A (ko) | 2021-10-08 | 2021-10-14 | 딥 드로잉에 적합한 코드 스레드 스틸 와이어 로드 및 그 제조 방법 |
JP2023537249A JP2023554466A (ja) | 2021-10-08 | 2021-10-14 | 深絞り加工に適したコード鋼線材及びその製造方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111171327.1A CN114134410A (zh) | 2021-10-08 | 2021-10-08 | 一种适于深度拉拔的帘线钢盘条及其制造方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN114134410A true CN114134410A (zh) | 2022-03-04 |
Family
ID=80394115
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202111171327.1A Pending CN114134410A (zh) | 2021-10-08 | 2021-10-08 | 一种适于深度拉拔的帘线钢盘条及其制造方法 |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP2023554466A (zh) |
KR (1) | KR20230051564A (zh) |
CN (1) | CN114134410A (zh) |
WO (1) | WO2023056658A1 (zh) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101514391A (zh) * | 2009-03-31 | 2009-08-26 | 武汉钢铁(集团)公司 | 一种能提高高碳钢线材拉拔韧性的生产方法 |
CN107695095A (zh) * | 2017-11-12 | 2018-02-16 | 湖南华菱湘潭钢铁有限公司 | 环保型高碳盘条氧化铁皮的生产方法 |
CN109794515A (zh) * | 2019-01-28 | 2019-05-24 | 东北大学 | 一种提高高碳钢盘条氧化铁皮机械剥离性能的方法 |
CN111996349A (zh) * | 2020-08-05 | 2020-11-27 | 鞍钢股份有限公司 | 一种低强度、高延伸帘线钢盘条的生产方法 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05117984A (ja) * | 1991-10-18 | 1993-05-14 | Kanai Hiroyuki | タイヤ用スチールコード |
CN105506479B (zh) * | 2014-09-26 | 2017-09-29 | 鞍钢股份有限公司 | 一种70级帘线外绕丝用盘条及其生产方法 |
CN105331895A (zh) * | 2015-11-23 | 2016-02-17 | 南京钢铁股份有限公司 | 一种含铬帘线钢及其制备方法 |
CN109735773A (zh) * | 2018-12-28 | 2019-05-10 | 首钢集团有限公司 | 一种高碳钢珠光体片层间距控制方法 |
CN111069280B (zh) * | 2019-11-30 | 2021-05-14 | 江苏省沙钢钢铁研究院有限公司 | 一种低强度帘线钢盘条生产方法 |
CN111893383A (zh) * | 2020-07-28 | 2020-11-06 | 南京钢铁股份有限公司 | 一种卡簧用钢盘条及其制备方法 |
CN112620385B (zh) * | 2020-11-25 | 2022-07-22 | 江苏省沙钢钢铁研究院有限公司 | 90级以上钢帘线、帘线钢及其生产方法 |
-
2021
- 2021-10-08 CN CN202111171327.1A patent/CN114134410A/zh active Pending
- 2021-10-14 KR KR1020237009103A patent/KR20230051564A/ko unknown
- 2021-10-14 JP JP2023537249A patent/JP2023554466A/ja active Pending
- 2021-10-14 WO PCT/CN2021/123778 patent/WO2023056658A1/zh active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101514391A (zh) * | 2009-03-31 | 2009-08-26 | 武汉钢铁(集团)公司 | 一种能提高高碳钢线材拉拔韧性的生产方法 |
CN107695095A (zh) * | 2017-11-12 | 2018-02-16 | 湖南华菱湘潭钢铁有限公司 | 环保型高碳盘条氧化铁皮的生产方法 |
CN109794515A (zh) * | 2019-01-28 | 2019-05-24 | 东北大学 | 一种提高高碳钢盘条氧化铁皮机械剥离性能的方法 |
CN111996349A (zh) * | 2020-08-05 | 2020-11-27 | 鞍钢股份有限公司 | 一种低强度、高延伸帘线钢盘条的生产方法 |
Non-Patent Citations (4)
Title |
---|
华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会: "《中华人民共和国国家标准 帘线钢用盘条 GB/T27691-2017》", 31 May 2017 * |
周琳: "《中国长材轧制技术与装备》", 30 June 2014 * |
张启富等: "《现代钢带连续热镀锌》", 30 January 2007, 冶金工业出版社 * |
武汉钢铁(集团)公司科学技术协会: "《魅力钢铁 钢铁的前世今生》", 30 September 2014, 冶金工业出版社 * |
Also Published As
Publication number | Publication date |
---|---|
WO2023056658A1 (zh) | 2023-04-13 |
JP2023554466A (ja) | 2023-12-27 |
KR20230051564A (ko) | 2023-04-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN111041372B (zh) | 一种具有深冷拉拔性能的弹簧钢盘条、弹簧钢丝、弹簧及制造方法 | |
CN109468530B (zh) | 2000MPa级以上大桥缆索镀锌钢丝用热轧盘条及生产方法 | |
CN113025917A (zh) | 一种具有低强度高塑性免退火冷镦钢用盘条及其制造方法 | |
CN105506500B (zh) | 一种具有优良低温性能的高强度盘条及其制造方法 | |
CN112342452B (zh) | 一种高强度胎圈钢丝用盘条的制造方法 | |
CN112391584A (zh) | 2060MPa级桥梁缆索钢丝用热处理盘条及生产方法 | |
CN102400036B (zh) | 一种高延伸率和高扩孔率的孪晶诱发塑性钢及其制造方法 | |
CN102936688B (zh) | 抗拉强度≥2000MPa的桥梁缆索用线材及生产方法 | |
CN110453153B (zh) | 一种低成本帘线钢盘条及其生产方法 | |
CN114318149A (zh) | 102级钢帘线、102级帘线钢盘条及其生产方法 | |
CN111394639A (zh) | 一种高耐磨齿轮钢的制造方法 | |
CN112458356A (zh) | 一种1860MPa级桥梁缆索镀锌钢丝用φ14mm盘条及制备方法 | |
CN112090956B (zh) | 一种低偏析高扭转桥梁缆索用盘条的生产控制方法 | |
CN118007033B (zh) | 1100MPa级Si-Cr系弹簧钢盘条及其控轧控冷方法 | |
CN110029275A (zh) | 一种高压输电线钢的生产方法 | |
CN105238994A (zh) | 一种列车缓冲器用钢及其制备方法 | |
CN114134398A (zh) | 一种屈强比为0.70-0.80的胀断连杆钢及制造方法 | |
KR20230059808A (ko) | 고표면 품질, 고성능 안전성을 갖는 780 MPa급 구멍 확장성이 매우 높은 철강 및 이의 제조 방법 | |
CN114406031B (zh) | 一种用于高速拉拔焊丝钢的轧制工艺 | |
CN103484764B (zh) | Ti析出强化型超高强热轧薄板及其生产方法 | |
CN113737099B (zh) | 可适应大变形量冷加工成型用工具钢及其制备方法和套筒及其制备方法 | |
CN114000064A (zh) | 一种厚度<4mm的超高强热轧钢带及其生产方法 | |
CN115261746B (zh) | 特厚Q420qE桥梁钢板及其生产方法 | |
CN114134410A (zh) | 一种适于深度拉拔的帘线钢盘条及其制造方法 | |
CN109136761A (zh) | 一种980MPa级高延性低密度汽车用奥氏体钢及其制备方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220304 |