CN114635084A - 一种降低高碳硬线钢偏析指数的方法 - Google Patents
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- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 35
- 239000010959 steel Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000005204 segregation Methods 0.000 title claims abstract description 21
- 239000012535 impurity Substances 0.000 claims abstract description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 11
- 239000000126 substance Substances 0.000 claims abstract description 8
- 238000009749 continuous casting Methods 0.000 claims abstract description 7
- 230000008569 process Effects 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 238000007670 refining Methods 0.000 claims abstract description 4
- 238000005096 rolling process Methods 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 239000011572 manganese Substances 0.000 abstract description 14
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 abstract description 8
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 abstract description 3
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 abstract description 2
- 229910001562 pearlite Inorganic materials 0.000 description 4
- 229910000734 martensite Inorganic materials 0.000 description 3
- 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 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 229910019582 Cr V Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000002547 anomalous effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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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
- 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
- B21B1/46—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 metal immediately subsequent to continuous casting
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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
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific 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
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/009—Pearlite
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- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
本发明公开了一种降低高碳硬线钢偏析指数的方法,所述高碳硬线钢化学成分以质量百分比计为:C:0.80‑0.85%,Si:0.15‑0.25%,Mn:0.70‑0.80%,Cr:0.15‑0.20%,V:0.1‑0.02%,余量为Fe和不可避免的杂质,杂质中的P≤0.020%,S≤0.020%;生产工艺与传统工艺相同,包括:铁水脱硫—转炉—LF精炼—连铸—高线轧制。本发明在传统的SWRH82B高碳硬线钢盘条基础上通过添加钒元素(加入量0.01‑0.02%wt)来提高高碳硬线钢的强度,而不是通过增加碳、锰含量来增加强度,最大限度的将碳、锰偏析风险降到最低。
Description
技术领域
本发明涉及冶金技术领域,尤其涉及一种降低高碳硬线钢偏析指数的方法。
背景技术
大规格高强度预应力钢绞线广泛运用在公路、铁路、大跨度桥梁、深水码头等关系国计民生的重要工程上,使用大规格高强度钢绞线代替钢筋可以大大提高建筑物的寿命、降低工程造价、提高建筑物的安全性。随着近年来国家为拉动内需,对基础设施的大力投入,高碳硬线钢产品得到高速的发展。
但是随着高碳硬线钢的强度要求越来越高,其碳、锰含量也随之增加,如果炼钢连铸控制不好,容易导致合金偏析、碳偏析风险增加,从而高碳硬线钢出现异常组织而导致拉拔断裂,如何满足高碳硬线钢高强的需求,又能将偏析风险降低最低是解决该问题的症结所在。
发明内容
为了解决上述技术问题,本发明的目的是提供一种降低高碳硬线钢偏析指数的方法,在传统的SWRH82B高碳硬线钢盘条基础上通过添加钒元素(加入量0.01-0.02%wt)来提高高碳硬线钢的强度,而不是通过增加碳、锰含量来增加强度,最大限度的将碳、锰偏析风险降到最低。
为解决上述技术问题,本发明采用如下技术方案:
本发明一种降低高碳硬线钢偏析指数的方法,所述高碳硬线钢化学成分以质量百分比计为:C:0.80-0.85%,Si:0.15-0.25%,Mn:0.70-0.80%,Cr:0.15-0.20%,V:0.1-0.02%,余量为Fe和不可避免的杂质,杂质中的P≤0.020%,S≤0.020%。
生产工艺与传统工艺相同,包括:铁水脱硫—转炉—LF精炼—连铸—高线轧制。
进一步的,所述高碳硬线钢化学成分以质量百分比计为:C:0.80%,Si:0.24%,Mn:0.75%,Cr:0.18%,V:0.01%,余量为Fe和不可避免的杂质,杂质中的P≤0.020%,S≤0.020%。
进一步的,所述高碳硬线钢化学成分以质量百分比计为:C:0.81%,Si:0.20%,Mn:0.76%,Cr:0.18%,V:0.012%,余量为Fe和不可避免的杂质,杂质中的P≤0.020%,S≤0.020%。
进一步的,所述高碳硬线钢抗拉强度为1200-1250MPa,断面收缩率≥25%。
与现有技术相比,本发明的有益技术效果:
本发明通过添加V元素,使钢CCT曲线向右上移动,从而抑制先共析铁素体析出.提高了钢的抗拉强度,在线材冷却速度不变的情况下,相应珠光体发生相变温度区间下降,随过冷度的增加,珠光体片层间距得到细化,从而提高强度。
而传统SWRH82B提高强度采用提高钢种碳、锰含量,易诱发元素偏析,在连铸凝固下不可避免的偏析情况下,促使成品高碳硬线钢盘条马氏体淬火组织出现,虽然提高了盘条强度,但牺牲了盘条韧性,最终导致用户在使用过程中拉拔断裂。
附图说明
下面结合附图说明对本发明作进一步说明。
图1为传统SWRH82B金相组织(异常马氏体组织);
图2为实施例1金相组织(正常索氏体+珠光体);
图3为实施例2金相组织(正常索氏体+珠光体)。
具体实施方式
一种降低高碳硬线钢偏析指数的方法,所述高碳硬线钢化学成分以质量百分比计为:C:0.80-0.85%,Si:0.15-0.25%,Mn:0.70-0.80%,Cr:0.15-0.20%,V:0.1-0.02%,余量为Fe和不可避免的杂质,杂质中的P≤0.020%,S≤0.020%。
生产工艺与传统工艺相同,包括:铁水脱硫—转炉—LF精炼—连铸—高线轧制。
各实施例具体成分见表1.
表1成品成分(%)
C | Si | Mn | Cr | V | |
传统SWRH82B | 0.84 | 0.23 | 0.89 | 0.22 | / |
实例1 | 0.80 | 0.24 | 0.75 | 0.18 | 0.01 |
实例2 | 0.81 | 0.20 | 0.76 | 0.18 | 0.012 |
传统SWRH82B盘条为了保证其高强度,其碳、锰含量均偏高,而本发明实例1和实例2采用添加钒元素的方法,将碳、锰含量降低,最大限度的将碳、锰偏析风险降到最低。
而传统SWRH82B提高强度采用提高钢种碳、锰含量,易诱发元素偏析,在连铸凝固下不可避免的偏析情况下,促使成品高碳硬线钢盘条马氏体淬火组织出现,虽然提高了盘条强度,但牺牲了盘条韧性,最终导致用户在使用过程中拉拔断裂。
表2性能检测结果
抗拉强度,MPa | 断面收缩率,% | |
传统SWRH82B | 1195 | 32 |
实例1 | 1220 | 31 |
实例2 | 1210 | 33 |
要求 | 1140-1250 | ≥25 |
以上所述的实施例仅是对本发明的优选方式进行描述,并非对本发明的范围进行限定,在不脱离本发明设计精神的前提下,本领域普通技术人员对本发明的技术方案做出的各种变形和改进,均应落入本发明权利要求书确定的保护范围内。
Claims (4)
1.一种降低高碳硬线钢偏析指数的方法,其特征在于,所述高碳硬线钢化学成分以质量百分比计为:C:0.80-0.85%,Si:0.15-0.25%,Mn:0.70-0.80%,Cr:0.15-0.20%,V:0.1-0.02%,余量为Fe和不可避免的杂质,杂质中的P≤0.020%,S≤0.020%;
生产工艺与传统工艺相同,包括:铁水脱硫—转炉—LF精炼—连铸—高线轧制。
2.根据权利要求1所述的降低高碳硬线钢偏析指数的方法,其特征在于,所述高碳硬线钢化学成分以质量百分比计为:C:0.80%,Si:0.24%,Mn:0.75%,Cr:0.18%,V:0.01%,余量为Fe和不可避免的杂质,杂质中的P≤0.020%,S≤0.020%。
3.根据权利要求1所述的降低高碳硬线钢偏析指数的方法,其特征在于,所述高碳硬线钢化学成分以质量百分比计为:C:0.81%,Si:0.20%,Mn:0.76%,Cr:0.18%,V:0.012%,余量为Fe和不可避免的杂质,杂质中的P≤0.020%,S≤0.020%。
4.根据权利要求1所述的降低高碳硬线钢偏析指数的方法,其特征在于,所述高碳硬线钢抗拉强度为1200-1250MPa,断面收缩率≥25%。
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030079815A1 (en) * | 2001-06-28 | 2003-05-01 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | High-carbon steel wire rod with superior drawability and method for production thereof |
JP2008261028A (ja) * | 2007-04-13 | 2008-10-30 | Nippon Steel Corp | 伸線加工性の優れた高炭素鋼線材 |
CN101376951A (zh) * | 2007-08-28 | 2009-03-04 | 宝山钢铁股份有限公司 | 高强度桥梁斜拉索及悬索镀锌钢丝用盘条及其制造方法 |
CN103334049A (zh) * | 2013-04-11 | 2013-10-02 | 内蒙古包钢钢联股份有限公司 | 一种高碳硬线盘条的生产方法 |
CN104651724A (zh) * | 2015-02-11 | 2015-05-27 | 宣化钢铁集团有限责任公司 | 预应力钢绞线用盘条及其生产方法 |
CN104805364A (zh) * | 2015-04-03 | 2015-07-29 | 甘肃酒钢集团宏兴钢铁股份有限公司 | 制作1×7-15.2/1860MPa预应力钢绞线用Φ10mm高强度盘条及其生产方法 |
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Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030079815A1 (en) * | 2001-06-28 | 2003-05-01 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | High-carbon steel wire rod with superior drawability and method for production thereof |
JP2008261028A (ja) * | 2007-04-13 | 2008-10-30 | Nippon Steel Corp | 伸線加工性の優れた高炭素鋼線材 |
CN101376951A (zh) * | 2007-08-28 | 2009-03-04 | 宝山钢铁股份有限公司 | 高强度桥梁斜拉索及悬索镀锌钢丝用盘条及其制造方法 |
CN103334049A (zh) * | 2013-04-11 | 2013-10-02 | 内蒙古包钢钢联股份有限公司 | 一种高碳硬线盘条的生产方法 |
CN104651724A (zh) * | 2015-02-11 | 2015-05-27 | 宣化钢铁集团有限责任公司 | 预应力钢绞线用盘条及其生产方法 |
CN104805364A (zh) * | 2015-04-03 | 2015-07-29 | 甘肃酒钢集团宏兴钢铁股份有限公司 | 制作1×7-15.2/1860MPa预应力钢绞线用Φ10mm高强度盘条及其生产方法 |
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