CN114657313A - 一种高铬高强度矿用钢绞线盘条的生产方法 - Google Patents
一种高铬高强度矿用钢绞线盘条的生产方法 Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 29
- 239000010959 steel Substances 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 13
- 239000011651 chromium Substances 0.000 title claims abstract description 13
- 238000005065 mining Methods 0.000 title claims abstract description 12
- 238000005096 rolling process Methods 0.000 claims abstract description 20
- 238000007670 refining Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000003723 Smelting Methods 0.000 claims abstract description 8
- 238000009749 continuous casting Methods 0.000 claims abstract description 6
- 238000009849 vacuum degassing Methods 0.000 claims abstract description 6
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 3
- 230000023556 desulfurization Effects 0.000 claims abstract description 3
- 229910052742 iron Inorganic materials 0.000 claims abstract description 3
- 238000010438 heat treatment Methods 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 5
- 238000010079 rubber tapping Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 4
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 4
- 239000010436 fluorite Substances 0.000 claims description 4
- 239000004571 lime Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- 239000011574 phosphorus Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 239000005997 Calcium carbide Substances 0.000 claims description 3
- 229910001570 bauxite Inorganic materials 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000009987 spinning Methods 0.000 claims description 3
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 claims description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- 229910002467 CrFe Inorganic materials 0.000 claims description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 2
- 238000005275 alloying Methods 0.000 claims description 2
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims description 2
- 239000003830 anthracite Substances 0.000 claims description 2
- 229910052786 argon Inorganic materials 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 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 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- 229910052717 sulfur Inorganic materials 0.000 claims description 2
- 239000011593 sulfur Substances 0.000 claims description 2
- 229910052720 vanadium Inorganic materials 0.000 claims description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 2
- 229910000616 Ferromanganese Inorganic materials 0.000 description 2
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 description 2
- 229910000604 Ferrochrome Inorganic materials 0.000 description 1
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- 229910000720 Silicomanganese Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000009489 vacuum treatment Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/30—Regulating or controlling the blowing
- C21C5/35—Blowing from above and through the bath
-
- 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
-
- 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
- B22D11/18—Controlling or regulating processes or operations for pouring
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/076—Use of slags or fluxes as treating agents
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
-
- 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
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
本发明公开了一种高铬高强度矿用钢绞线盘条的生产方法，工艺流程为：铁水脱硫—转炉冶炼—LF精炼—VD真空脱气—大方坯连铸—开坯—高线轧制。本发明的盘条抗拉强度得到明显提升均大于1200MPa，面缩率大于30％，抗拉强度远大于普通SWRH82B 1120MPa的级别，面缩率基本相当。
Description
技术领域
本发明涉及冶金技术领域，尤其涉及一种高铬高强度矿用钢绞线盘条的生产方法。
背景技术
SWRH82B是日标JIS G3506-2004高碳钢盘条标准中规定的钢种，目前国内较多钢厂采用该标准成分进行生产，该盘条主要是用来生产钢绞线、预应力钢棒等产品，随着矿山领域对高强钢绞线的不断需求增加，高强矿用钢绞线对SWRH82B抗拉强度的要求越来越高。
如何提高SWRH82B盘条抗拉强度，满足用户使用要求是重点难点所在。
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高铬高强度矿用钢绞线盘条的生产方法。
为解决上述技术问题，本发明采用如下技术方案：
一种高铬高强度矿用钢绞线盘条的生产方法，工艺流程为：铁水脱硫—转炉冶炼—LF精炼—VD真空脱气—大方坯连铸—开坯—高线轧制；其中：
控制转炉终点钢水质量百分数的碳含量、磷含量及出钢温度如下：碳含量C≥0.05％，P≤0.018％，出钢温度1602-1646℃；采用顶底复吹转炉冶炼，采用MnFe、SiMnFe脱氧合金化，后期加入CrFe合金，增碳剂选用无烟煤；LF精炼根据转炉钢水成分适量加入白灰、萤石和铝矾土，电石加入量控制在50-100kg；保证LF精炼足够时间，并全程吹氩足够搅拌时间使夹杂物上浮，达到去除夹杂物降低氧含量的目的，根据钢水成分及温度变化进行造渣，微调和升温操作；VD精炼要求VD炉冶炼的深真空时间都大于13min，软吹时间8min以上；连铸生产中过热度控制在20-32℃之间，拉速在0.6m/min-0.75m/min之间；坯料轧制将断面为280mm×380mm的大方坯轧制为断面为152mm×152mm的方坯后，送到高线轧制；钢坯在加热炉内加热时间大于2小时，轧制Φ13mm盘条时开轧温度均为1030℃-1070℃，入精轧温度880-920℃，吐丝温度850-890℃，斯太尔摩冷却线保温罩全部打开，风机1-10架风量100％开。
进一步的，铸坯规格：280×380mm定尺5.1m；拉速：0.65m/min；采用结晶器电磁搅拌。
进一步的，该出口高强度盘条设计化学成分要求为：碳含量0.79-0.84wt％，硅含量0.15-0.35wt％，锰含量0.60-0.90wt％，磷含量小于等于0.020wt％，硫含量小于等于0.015wt％，铬含量0.32-0.36wt％，钒含量0.01-0.02wt％，其余为Fe及不可避免的杂质。
进一步的，所生产的盘条抗拉强度得到明显提升均大于1200MPa，面缩率大于30％。
与现有技术相比，本发明的有益技术效果：
本发明的盘条抗拉强度得到明显提升均大于1200MPa，面缩率大于30％，抗拉强度远大于普通SWRH82B 1120MPa的级别，面缩率基本相当。
具体实施方式
一种高铬高强度矿用钢绞线盘条的生产方法，工业试生产了10炉钢，具体的工艺参数控制如下：
转炉生产
转炉冶炼时根据实际情况加入白灰、白云石、萤石，出钢过程中加入锰铁、硅锰、铬铁。
LF炉精炼
LF炉精炼根据钢水成分及温度变化进行加辅料造渣，加合金进行微调和升温操作。加入白灰、萤石、铝矾土、电石，合金根据精炼就位成分进行微调锰铁。各实施例化学成分见表2。
VD真空脱气
钢包精炼后的钢水经VD炉真空脱气处理，进一步降低钢中有害气体含量，提高钢的洁净度。真空脱气工艺参数见表1。
表1VD工艺参数
| 编号 | 真空处理时间 | 深真空时间 | 真空度(Kpa) | 软吹时间 |
| 1 | 19′ | 14.9′ | 0.01 | 10′ |
| 2 | 17′ | 13.5′ | 0.01 | 12′ |
| 3 | 16′ | 18.9′ | 0.01 | 10′ |
| 4 | 15′ | 16.6′ | 0.01 | 13′ |
| 5 | 22′ | 15.8′ | 0.01 | 15′ |
| 6 | 21′ | 17.8′ | 0.01 | 17′ |
| 7 | 19′ | 16.8′ | 0.01 | 12′ |
| 8 | 18′ | 19.7′ | 0.01 | 8′ |
| 9 | 22′ | 14.9′ | 0.01 | 10′ |
| 10 | 19′ | 13.5′ | 0.01 | 13′ |
连铸生产
铸坯规格：280×380mm定尺5.1m；正常拉速：0.65m/min；过热度：20-32℃；采用结晶器电磁搅拌。
表2化学成分
轧制
经轨梁将大方坯轧制为152㎜×152㎜方钢后将小方坯送往高线轧制，小方坯在加热炉内加热时间大于2小时，轧制Φ13mm盘条时开轧温度均为1040℃—1060℃，入精轧温度870-910℃，吐丝温度855-885℃，斯太尔摩冷却线保温罩全部打开，风机1-10架风量100％开，盘条力学性能结果见表2。
表3力学性能结果
检验结果表明采用设计的SWRH82BCr成分，盘条抗拉强度得到明显提升均大于1200MPa，面缩率大于30％，抗拉强度远大于普通SWRH82B 1120MPa的级别，面缩率基本相当。
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)
1.一种高铬高强度矿用钢绞线盘条的生产方法，其特征在于，工艺流程为：铁水脱硫—转炉冶炼—LF精炼—VD真空脱气—大方坯连铸—开坯—高线轧制；其中：
控制转炉终点钢水质量百分数的碳含量、磷含量及出钢温度如下：碳含量C≥0.05％，P≤0.018％，出钢温度1602-1646℃；采用顶底复吹转炉冶炼，采用MnFe、SiMnFe脱氧合金化，后期加入CrFe合金，增碳剂选用无烟煤；LF精炼根据转炉钢水成分适量加入白灰、萤石和铝矾土，电石加入量控制在50-100kg；保证LF精炼足够时间，并全程吹氩足够搅拌时间使夹杂物上浮，达到去除夹杂物降低氧含量的目的，根据钢水成分及温度变化进行造渣，微调和升温操作；VD精炼要求VD炉冶炼的深真空时间都大于13min，软吹时间8min以上；连铸生产中过热度控制在20-32℃之间，拉速在0.6m/min-0.75m/min之间；坯料轧制将断面为280mm×380mm的大方坯轧制为断面为152mm×152mm的方坯后，送到高线轧制；钢坯在加热炉内加热时间大于2小时，轧制Φ13mm盘条时开轧温度均为1030℃-1070℃，入精轧温度880-920℃，吐丝温度850-890℃，斯太尔摩冷却线保温罩全部打开，风机1-10架风量100％开。
2.根据权利要求1所述的高铬高强度矿用钢绞线盘条的生产方法，其特征在于，铸坯规格：280×380mm定尺5.1m；拉速：0.65m/min；采用结晶器电磁搅拌。
3.根据权利要求1所述的高铬高强度矿用钢绞线盘条的生产方法，其特征在于，该出口高强度盘条设计化学成分要求为：碳含量0.79-0.84wt％，硅含量0.15-0.35wt％，锰含量0.60-0.90wt％，磷含量小于等于0.020wt％，硫含量小于等于0.015wt％，铬含量0.32-0.36wt％，钒含量0.01-0.02wt％，其余为Fe及不可避免的杂质。
4.根据权利要求1所述的高铬高强度矿用钢绞线盘条的生产方法，其特征在于，所生产的盘条抗拉强度得到明显提升均大于1200MPa，面缩率大于30％。
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| CN115747613A (zh) * | 2022-11-01 | 2023-03-07 | 包头钢铁（集团）有限责任公司 | 一种铁路轨枕钢筋用盘条的生产方法 |
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