CN114000057A - 加稀土冶炼的mc6c轧辊用钢及其冶炼连铸工艺 - Google Patents
加稀土冶炼的mc6c轧辊用钢及其冶炼连铸工艺 Download PDFInfo
- Publication number
- CN114000057A CN114000057A CN202111266674.2A CN202111266674A CN114000057A CN 114000057 A CN114000057 A CN 114000057A CN 202111266674 A CN202111266674 A CN 202111266674A CN 114000057 A CN114000057 A CN 114000057A
- Authority
- CN
- China
- Prior art keywords
- equal
- less
- steel
- percent
- continuous casting
- 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 73
- 239000010959 steel Substances 0.000 title claims abstract description 73
- 238000009749 continuous casting Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000003723 Smelting Methods 0.000 title claims abstract description 18
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 16
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 14
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 12
- 239000000956 alloy Substances 0.000 claims abstract description 12
- 238000005266 casting Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 12
- 238000002844 melting Methods 0.000 claims abstract description 8
- 230000008018 melting Effects 0.000 claims abstract description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 30
- 239000007789 gas Substances 0.000 claims description 23
- 239000011651 chromium Substances 0.000 claims description 20
- 229910052799 carbon Inorganic materials 0.000 claims description 18
- 238000010079 rubber tapping Methods 0.000 claims description 17
- 229910052786 argon Inorganic materials 0.000 claims description 15
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 14
- 238000005070 sampling Methods 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 11
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 9
- 229910000616 Ferromanganese Inorganic materials 0.000 claims description 9
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 9
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 claims description 9
- 239000004571 lime Substances 0.000 claims description 9
- 229910000604 Ferrochrome Inorganic materials 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 6
- 238000000605 extraction Methods 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 5
- 239000002893 slag Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910001309 Ferromolybdenum Inorganic materials 0.000 claims description 4
- 238000000137 annealing Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000005997 Calcium carbide Substances 0.000 claims description 3
- 229910000628 Ferrovanadium Inorganic materials 0.000 claims description 3
- 230000004907 flux Effects 0.000 claims description 3
- PNXOJQQRXBVKEX-UHFFFAOYSA-N iron vanadium Chemical compound [V].[Fe] PNXOJQQRXBVKEX-UHFFFAOYSA-N 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
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- 238000007670 refining Methods 0.000 abstract description 2
- 238000007872 degassing Methods 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000009849 vacuum degassing Methods 0.000 description 1
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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/041—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for vertical casting
-
- 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
- C21C7/0006—Adding metallic additives
-
- 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
- C21C7/064—Dephosphorising; Desulfurising
-
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/006—Making ferrous alloys compositions used for making 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
- C22C33/06—Making ferrous alloys by melting using master alloys
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
本发明涉及一种加稀土冶炼的MC6C轧辊用钢的冶炼连铸工艺,采用EAF~LF~VD~CC立式连铸工艺,MC6C轧辊用钢成分按照重量百分比如下:[C]:0.85~0.90%,[Si]:0.80~1.00%,[Mn]:0.25~0.50%,[P]≤0.020%,[S]≤0.015%,[Cr]:5.80~6.20%,[Mo]:0.40~0.60%,[Ni]:0.30~0.40%,[V]:0.10~0.20%,[Cu]≤0.25%,[As]、[Sn]、[Pb]、[Sb]、[Bi]均≤0.020%,铸坯检测[H]≤1.5ppm、[O]≤30ppm、[N]≤130ppm,电炉熔化钢铁料得到初炼钢水,经精炼炉调整合金成分,成分合适之后转VD脱气,VD真空解除前加入0.17~0.22Kg/t稀土,脱气完成后转立式连铸浇钢,最后连铸坯经退火处理,得到成分合格、耐磨性更好的MC6C连铸坯原料,适用于立式连铸生产MC6C轧辊用钢。
Description
技术领域
本发明属于炼钢技术领域,涉及一种耐磨性和抗事故率强的加稀土冶炼的MC6C轧辊用钢及其冶炼连铸工艺。
背景技术
MC6C钢是一种轧辊用钢,Cr含量与MC5相比提高了1%,具有更好的耐磨性和抗事故率,是一种升级材料,有一些大型钢铁企业已经将其作为常规备件材料,有一定的应用前景。但该辊坯产品由于使用规格大、质量要求高,超声波探伤、网状碳化物的控制是该产品的重点和难点。因此,通过化学成分的优化设计,先进的冶炼工艺来保证原始材料的质量,为产品最终质量达标提供优质的冶金材料基础,是企业追求的目标。
发明内容
本发明的目的在于克服现有技术中存在的不足而提供一种在MC6C钢中加入适量稀土元素,细化MC6C钢晶粒,提高MC6C钢耐磨性能,优化轧辊用钢使用性能的加稀土冶炼的MC6C轧辊用钢及其冶炼连铸工艺。
为了实现上述目的,本发明采用如下技术方案:
一种加稀土冶炼的MC6C轧辊用钢,采用EAF~LF~VD~CC立式连铸的工艺路线,MC6C轧辊用钢的成分按照重量百分比如下:[C]:0.85~0.90%,[Si]:0.80~1.00%,[Mn]:0.25~0.50%,[P]≤0.020%,[S]≤0.015%,[Cr]:5.80~6.20%,[Mo]:0.40~0.60%,[Ni]:0.30~0.40%,[V]:0.10~0.20%,[Cu]≤0.25%,[As]、[Sn]、[Pb]、[Sb]、[Bi]均≤0.020%,铸坯检测[H]≤1.5ppm、[O]≤30ppm、[N]≤130ppm。
一种加稀土冶炼的MC6C轧辊用钢的冶炼连铸工艺,具体步骤如下:
步骤1)、在EAF炉内加入废钢、钢屑、料头作为钢铁料送电熔化,熔化期间加入增碳剂10~20Kg/吨,熔清后加入白灰25~35Kg/吨吹氧,吹氧量达到15m3/t流渣,温度≥1580℃取样,按照重量百分比出钢控制[C]≤0.60%,[P]≤0.005%,[Ni]≤0.35%,[V]≤0.20%,[Cu]≤0.25%,[As]、[Sn]、[Pb]、[Sb]、[Bi]均≤0.020%,控制出钢温度1630~1660℃,出钢过程中向钢包内加入铝块1~3kg/t、石灰4~7kg/t、硅铁2~4kg/t、高碳锰铁1~2kg/t、高碳铬铁25~35kg/t,出钢后转入LF炉;
步骤2)、LF炉就位接通氩气透气塞,调整氩气流量20~200Nl/min,加入白灰10~15Kg/t、电石1~2Kg/t、碳粉1~2Kg/t和硅铁粉1~2Kg/t,送电20min取样,根据第一次取样结果,分批次加入8~9Kg/t硅铁调整Si含量,加入3~6Kg/t高碳锰铁调整Mn含量,加入80~85Kg/t高碳铬铁调整Cr含量,加入0.6Kg/t铝块调整Al含量,加入3~4Kg/tNi板调整Ni含量,加入2~4Kg/t钒铁调整V含量,加入7~10Kg/t钼铁调整Mo含量,每批次加入合金量≤3吨,每批次调整合金之后送电15~20min取样,每次送电期间加入碳粉1~2Kg/t和硅铁粉1~2Kg/t脱氧,按照重量百分比控制[C]:0.85~0.90%,[Si]:0.80~1.00%,[Mn]:0.25~0.50%,[P]≤0.020%,[S]≤0.015%,[Cr]:5.80~6.20%,[Mo]:0.40~0.60%,[Ni]:0.30~0.40%,[V]:0.10~0.20%,[Cu]≤0.25%,温度1580~1610℃转入VD抽气,抽气前根据最后一次取样Al含量喂Al线,按照重量百分比调整VD前Al:0.020~0.035%,转VD炉抽气;
步骤3)、VD炉就位后接通氩气透气塞,调整氩气流量20~50Nl/min、测温1580~1610℃、扣VD罐盖,启动一级泵,间隔时间2~4min逐级启动二级泵、三级泵,真空度达到0.7mbar调整氩气流量100~150Nl/min,0.7mbar下保持时间≥20min,真空解除前加入0.17~0.22Kg/t稀土后破空、抬盖,取样、定[H]、定[O]、取气体样检测[N]含量,按照重量百分比控制[C]:0.85~0.90%,[Si]:0.80~1.00%,[Mn]:0.25~0.50%,[P]≤0.020%,[S]≤0.015%,[Cr]:5.80~6.20%,[Mo]:0.40~0.60%,[Ni]:0.30~0.40%,[V]:0.10~0.20%,[Cu]≤0.25%,[As]、[Sn]、[Pb]、[Sb]、[Bi]均≤0.020%,定[H]≤1.5ppm、定[O]≤5ppm、气体样[N]≤80ppm,弱搅拌时间≥15min,首炉出钢温度1510~1520℃,连浇炉次出钢温度1500~1510℃,转立式连铸浇钢;
步骤4)、立式连铸浇钢,连铸中间包过热度15~25℃,设定拉速0.20m/min,结晶器水量3500L/min,二冷制度采用强冷,结晶器电搅参数:电流500A、频率5HZ,铸流电搅参数:电流200A、频率4HZ,使用H-4保护渣;
步骤5)、出坯冷却,采用退火冷却制度。
在步骤1)中,所使用的废钢、钢屑、料头为无油污、无严重锈蚀的钢铁料。
在步骤2)中,使用高碳高铬、高碳锰铁合金在使用前分析合金中[P]含量,控制钢液最终[P]≤0.020%。
本发明的技术方案产生的积极效果如下:本发明采用EAF~LF~VD~CC立式连铸的工艺路线,原料为优质废钢、钢屑、料头等钢铁料及高碳铬铁、高碳锰铁、硅铁、钼铁、钒铁、Ni板等组成。电炉熔化钢铁料得到[C]≤0.60%,[P]≤0.005%,[Ni]≤0.35%,[V]≤0.20%,[Cu]≤0.25%,[As]、[Sn]、[Pb]、[Sb]、[Bi]均≤0.020%的初炼钢水,转精炼之后造渣、脱氧、脱硫、调整合金元素、调整温度,得到成分符合[C]:0.85~0.90%,[Si]:0.80~1.00%,[Mn]:0.25~0.50%,[P]≤0.020%,[S]≤0.015%,[Cr]:5.80~6.20%,[Mo]:0.40~0.60%,[Ni]:0.30~0.40%,[V]:0.10~0.20%,[Cu]≤0.25%的钢水,经VD脱气,去除钢液中的气体,真空解除前加入0.17~0.22Kg/t稀土,最终得到成分符合[C]:0.85~0.90%,[Si]:0.80~1.00%,[Mn]:0.25~0.50%,[P]≤0.020%,[S]≤0.015%,[Cr]:5.80~6.20%,[Mo]:0.40~0.60%,[Ni]:0.30~0.40%,[V]:0.10~0.20%,[Cu]≤0.25%,[As]、[Sn]、[Pb]、[Sb]、[Bi]均≤0.020%,定[H]≤1.5ppm、定[O]≤5ppm、气体样[N]≤80ppm的终炼钢水,采用立式连铸成型,控制连铸中间包过热度15~25℃,设定拉速0.20m/min,结晶器水量3500L/min,二冷制度采用强冷,结晶器电搅参数:电流500A、频率5HZ,铸流电搅参数:电流200A、频率4HZ,使用H-4保护渣、退火处理,最终得到成分、表面质量合格的连铸坯。本冶炼工艺适用立式连铸生产MC6C钢,具有如下优点:(1)控制较低的[O]、[N]含量;(2)立式连铸有利于钢液夹杂物上浮,有利于提升连铸坯内部质量;(3)避免弧形连铸经拉矫机矫直产生矫直裂纹,可实现低拉速拉钢,更有利于连铸坯心部质量提升。(4)向钢种加入稀土元素,有利于细化晶粒,提高轧辊用钢MC6C性能。
具体实施方式
实施例1:一种加稀土冶炼的MC6C轧辊用钢及其冶炼连铸工艺,采用EAF~LF~VD~CC:立式连铸的工艺路线,MC6C的成分如下:[C]:0.85~0.90%,[Si]:0.80~1.00%,[Mn]:0.25~0.50%,[P]≤0.020%,[S]≤0.015%,[Cr]:5.80~6.20%,[Mo]:0.40~0.60%,[Ni]:0.30~0.40%,[V]:0.10~0.20%,[Cu]≤0.25%,[As]、[Sn]、[Pb]、[Sb]、[Bi]均≤0.020%,铸坯检测[H]≤1.5ppm、[O]≤30ppm、[N]≤130ppm,冶炼工艺包括如下步骤:
步骤1)、在EAF炉内加入废钢320~360Kg/t、钢屑540~650Kg/t、料头200~240Kg/t等钢铁料送电熔化,熔化期间加入增碳剂10~20Kg/吨,熔清后加入白灰25~35Kg/吨吹氧,吹氧量达到15m3/t流渣,温度≥1580℃取样,出钢控制[C]≤0.60%,[P]≤0.005%,[Ni]≤0.35%,[V]≤0.20%,[Cu]≤0.25%,[As]、[Sn]、[Pb]、[Sb]、[Bi]均≤0.020%,控制出钢温度1630~1660℃,出钢过程中向钢包内加入铝块1~3kg/t、石灰4~7kg/t、硅铁2~4kg/t、高碳锰铁1~2kg/t、高碳铬铁25~35kg/t,出钢后转入LF炉。
步骤2)、LF就位接通氩气透气塞,调整氩气流量20~200Nl/min,加入白灰400~600Kg、电石1~2Kg/t、碳粉1~2Kg/t和硅铁粉1~2Kg/t,送电20min取样,根据第一次取样结果,分批次加入8~9Kg/t硅铁调整Si含量,加入3~6Kg/t高碳锰铁调整Mn含量,加入80~85Kg/t高碳铬铁调整Cr含量,加入0.6Kg/t铝块调整Al含量,加入3~4Kg/tNi板调整Ni含量,加入2~4Kg/t钒铁调整V含量,加入7~10Kg/t钼铁调整Mo含量,每批次加入合金量≤3吨,每批次调整合金之后送电15~20min取样,每次送电期间加入碳粉1~2Kg/t和硅铁粉1~2Kg/t脱氧,控制[C]:0.85~0.90%,[Si]:0.80~1.00%,[Mn]:0.25~0.50%,[P]≤0.020%,[S]≤0.015%,[Cr]:5.80~6.20%,[Mo]:0.40~0.60%,[Ni]:0.30~0.40%,[V]:0.10~0.20%,[Cu]≤0.25%,温度1580~1610℃转入VD抽气,抽气前根据最后一次取样Al含量喂Al线,调整VD前Al:0.020~0.035%,转VD抽气。
步骤3)、VD就位后接通氩气透气塞,调整氩气流量20~50Nl/min、测温1580~1610℃、扣VD罐盖,启动一级泵,间隔时间2~4min逐级启动二级泵、三级泵,真空度达到0.7mbar调整氩气流量100~150Nl/min,0.7mbar下保持时间≥20min,真空解除前加入0.17~0.22Kg/t稀土后破空、抬盖,取样、定[H]、定[O]、取气体样检测[N]含量,控制[C]:0.85~0.90%,[Si]:0.80~1.00%,[Mn]:0.25~0.50%,[P]≤0.020%,[S]≤0.015%,[Cr]:5.80~6.20%,[Mo]:0.40~0.60%,[Ni]:0.30~0.40%,[V]:0.10~0.20%,[Cu]≤0.25%,[As]、[Sn]、[Pb]、[Sb]、[Bi]均≤0.020%,定[H]≤1.5ppm、定[O]≤5ppm、气体样[N]≤80ppm,弱搅拌时间≥15min,首炉出钢温度1510~1520℃,连浇炉次出钢温度1500~1510℃,转立式连铸浇钢。
步骤4)、立式连铸浇钢,连铸中间包过热度15~25℃,设定拉速0.20m/min,结晶器水量3500L/min,二冷制度采用强冷,结晶器电搅参数:电流500A、频率5HZ,铸流电搅参数:电流200A、频率4HZ,使用H-4保护渣。
步骤5)、出坯冷却,采用退火冷却制度。
根据本实施例的冶炼工艺进行了四炉冶炼,四炉实施例冶炼得到的产品的化学成分含量表1中,均符合目标要求:
表1化学成分m%
本冶炼工艺适用于立式连铸生产轧辊用钢MC6C冶炼。
Claims (4)
1.一种加稀土冶炼的MC6C轧辊用钢,其特征在于:采用EAF~LF~VD~CC立式连铸的工艺路线,MC6C轧辊用钢的成分按照重量百分比如下:[C]:0.85~0.90%,[Si]:0.80~1.00%,[Mn]:0.25~0.50%,[P]≤0.020%,[S]≤0.015%,[Cr]:5.80~6.20%,[Mo]:0.40~0.60%,[Ni]:0.30~0.40%,[V]:0.10~0.20%,[Cu]≤0.25%,[As]、[Sn]、[Pb]、[Sb]、[Bi]均≤0.020%,铸坯检测[H]≤1.5ppm、[O]≤30ppm、[N]≤130ppm。
2.一种加稀土冶炼的MC6C轧辊用钢的冶炼连铸工艺,其特征在于:具体步骤如下:
步骤1)、在EAF炉内加入废钢、钢屑、料头作为钢铁料送电熔化,熔化期间加入增碳剂10~20Kg/吨,熔清后加入白灰25~35Kg/吨吹氧,吹氧量达到15m3/t流渣,温度≥1580℃取样,按照重量百分比出钢控制[C]≤0.60%,[P]≤0.005%,[Ni]≤0.35%,[V]≤0.20%,[Cu]≤0.25%,[As]、[Sn]、[Pb]、[Sb]、[Bi]均≤0.020%,控制出钢温度1630~1660℃,出钢过程中向钢包内加入铝块1~3kg/t、石灰4~7kg/t、硅铁2~4kg/t、高碳锰铁1~2kg/t、高碳铬铁25~35kg/t,出钢后转入LF炉;
步骤2)、LF炉就位接通氩气透气塞,调整氩气流量20~200Nl/min,加入白灰10~15Kg/t、电石1~2Kg/t、碳粉1~2Kg/t和硅铁粉1~2Kg/t,送电20min取样,根据第一次取样结果,分批次加入8~9Kg/t硅铁调整Si含量,加入3~6Kg/t高碳锰铁调整Mn含量,加入80~85Kg/t高碳铬铁调整Cr含量,加入0.6Kg/t铝块调整Al含量,加入3~4Kg/tNi板调整Ni含量,加入2~4Kg/t钒铁调整V含量,加入7~10Kg/t钼铁调整Mo含量,每批次加入合金量≤3吨,每批次调整合金之后送电15~20 min取样,每次送电期间加入碳粉1~2Kg/t和硅铁粉1~2Kg/t脱氧,按照重量百分比控制[C]:0.85~0.90%,[Si]:0.80~1.00%,[Mn]:0.25~0.50%,[P]≤0.020%,[S]≤0.015%,[Cr]:5.80~6.20%,[Mo]:0.40~0.60%,[Ni]:0.30~0.40%,[V]:0.10~0.20%,[Cu]≤0.25%,温度1580~1610℃转入VD抽气,抽气前根据最后一次取样Al含量喂Al线,按照重量百分比调整VD前Al:0.020~0.035%,转VD炉抽气;
步骤3)、VD炉就位后接通氩气透气塞,调整氩气流量20~50Nl/min、测温1580~1610℃、扣VD罐盖,启动一级泵,间隔时间2~4min逐级启动二级泵、三级泵,真空度达到0.7mbar调整氩气流量100~150Nl/min,0.7mbar下保持时间≥20min,真空解除前加入0.17~0.22Kg/t稀土后破空、抬盖,取样、定[H]、定[O]、取气体样检测[N]含量,按照重量百分比控制[C]:0.85~0.90%,[Si]:0.80~1.00%,[Mn]:0.25~0.50%,[P]≤0.020%,[S]≤0.015%,[Cr]:5.80~6.20%,[Mo]:0.40~0.60%,[Ni]:0.30~0.40%,[V]:0.10~0.20%,[Cu]≤0.25%,[As]、[Sn]、[Pb]、[Sb]、[Bi]均≤0.020%,定[H]≤1.5ppm、定[O]≤5ppm、气体样[N]≤80ppm,弱搅拌时间≥15min,首炉出钢温度1510~1520℃,连浇炉次出钢温度1500~1510℃,转立式连铸浇钢;
步骤4)、立式连铸浇钢,连铸中间包过热度15~25℃,设定拉速0.20m/min,结晶器水量3500L/min,二冷制度采用强冷,结晶器电搅参数:电流500A、频率5HZ,铸流电搅参数:电流200A、频率4HZ,使用H-4保护渣;
步骤5)、出坯冷却,采用退火冷却制度。
3.根据权利要求2所述的一种加稀土冶炼的MC6C轧辊用钢的冶炼连铸工艺,其特征在于:在步骤1)中,所使用的废钢、钢屑、料头为无油污、无严重锈蚀的钢铁料。
4.根据权利要求2所述的一种加稀土冶炼的MC6C轧辊用钢的冶炼连铸工艺,其特征在于:在步骤2)中,使用高碳高铬、高碳锰铁合金在使用前分析合金中[P]含量,控制钢液最终[P]≤0.020%。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111266674.2A CN114000057A (zh) | 2021-10-28 | 2021-10-28 | 加稀土冶炼的mc6c轧辊用钢及其冶炼连铸工艺 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111266674.2A CN114000057A (zh) | 2021-10-28 | 2021-10-28 | 加稀土冶炼的mc6c轧辊用钢及其冶炼连铸工艺 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN114000057A true CN114000057A (zh) | 2022-02-01 |
Family
ID=80111418
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202111266674.2A Pending CN114000057A (zh) | 2021-10-28 | 2021-10-28 | 加稀土冶炼的mc6c轧辊用钢及其冶炼连铸工艺 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN114000057A (zh) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004225097A (ja) * | 2003-01-22 | 2004-08-12 | Kanto Special Steel Works Ltd | 遠心鋳造製複合中間ロール |
CN102433515A (zh) * | 2011-08-22 | 2012-05-02 | 中原特钢股份有限公司 | Mc5钢及利用其制备的大型平整辊以及mc5钢的制造工艺 |
US20130193223A1 (en) * | 2010-09-02 | 2013-08-01 | Pangang Group Panzhihua Steel & Vanadium Co. Ltd | Steel rail for high speed and quasi-high speed railways and method of manufacturing the same |
CN103966385A (zh) * | 2014-05-14 | 2014-08-06 | 中原特钢股份有限公司 | 一种利用返回料冶炼mc5轧辊的工艺 |
WO2020078007A1 (zh) * | 2018-10-17 | 2020-04-23 | 南京钢铁股份有限公司 | 一种高强高韧性非调质圆钢及制备方法 |
-
2021
- 2021-10-28 CN CN202111266674.2A patent/CN114000057A/zh active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004225097A (ja) * | 2003-01-22 | 2004-08-12 | Kanto Special Steel Works Ltd | 遠心鋳造製複合中間ロール |
US20130193223A1 (en) * | 2010-09-02 | 2013-08-01 | Pangang Group Panzhihua Steel & Vanadium Co. Ltd | Steel rail for high speed and quasi-high speed railways and method of manufacturing the same |
CN102433515A (zh) * | 2011-08-22 | 2012-05-02 | 中原特钢股份有限公司 | Mc5钢及利用其制备的大型平整辊以及mc5钢的制造工艺 |
CN103966385A (zh) * | 2014-05-14 | 2014-08-06 | 中原特钢股份有限公司 | 一种利用返回料冶炼mc5轧辊的工艺 |
WO2020078007A1 (zh) * | 2018-10-17 | 2020-04-23 | 南京钢铁股份有限公司 | 一种高强高韧性非调质圆钢及制备方法 |
Non-Patent Citations (1)
Title |
---|
机械工程学会铸造专业学会: "《铸造手册 第2卷》", 31 December 1991 * |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN104532102B (zh) | 风电用大规格渗碳轴承钢G20Cr2Ni4A制造工艺 | |
CN102758144B (zh) | 一种大规格高氮护环钢钢锭的生产方法 | |
CN105177215B (zh) | 一种高铝合金结构圆钢的高效生产工艺 | |
CN112981128B (zh) | 用于非保护气氛电渣重熔h13钢的电极棒母材的冶炼方法 | |
CN111910045B (zh) | 一种高纯奥氏体不锈钢的冶炼方法 | |
CN114000052A (zh) | 高压锅炉管用钢p92模铸圆锭及其冶炼工艺 | |
CN113088812B (zh) | 一种高强韧超低温耐冲击油管头锻件毛坯及其制造方法 | |
CN101255531A (zh) | 低Ti齿轮钢生产方法 | |
CN108893682B (zh) | 模具钢钢坯及其制备方法 | |
WO2012079415A1 (zh) | 一种铁路机车车轴用钢及其制造方法 | |
CN115007821B (zh) | 一种大方坯GCr15SiMn轴承钢及其冶炼方法 | |
CN111118409A (zh) | 一种阀箱用低碳马氏体不锈钢及其冶炼方法 | |
CN113770316B (zh) | 一种低碳、低铝、高铬钢锻圆探伤合格率提升方法 | |
CN114000054A (zh) | GCr15SiMn轴承钢连铸坯及其冶炼连铸工艺 | |
CN110541115A (zh) | 一种奥氏体不锈钢§150小规格连铸圆管坯制造方法 | |
CN113528976B (zh) | 一种非调质无表面裂纹棒材及其制备方法 | |
CN112501477A (zh) | 一种微碳低硫高铝无铁铝镁钙合金脱氧剂及其制备方法和应用 | |
CN114892066B (zh) | 一种低碳电极用钢的生产方法 | |
CN114000057A (zh) | 加稀土冶炼的mc6c轧辊用钢及其冶炼连铸工艺 | |
CN108570599A (zh) | 一种高强高硬窄淬透性石油用4145h钢锭及其生产方法 | |
CN112481550B (zh) | 一种镧铈稀土合金模具钢冶炼工艺 | |
CN113186445A (zh) | 不锈钢产品夹杂物含量控制方法 | |
CN114150101A (zh) | 一种用钢包铸余钢水生产电镀锡基板钢的方法 | |
CN109797348A (zh) | 一种高强度板簧及其生产工艺 | |
CN115287546A (zh) | 高压气瓶管用4130x钢及其冶炼连铸生产工艺 |
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 |
Application publication date: 20220201 |
|
RJ01 | Rejection of invention patent application after publication |