CN114000054A - GCr15SiMn轴承钢连铸坯及其冶炼连铸工艺 - Google Patents
GCr15SiMn轴承钢连铸坯及其冶炼连铸工艺 Download PDFInfo
- Publication number
- CN114000054A CN114000054A CN202111217901.2A CN202111217901A CN114000054A CN 114000054 A CN114000054 A CN 114000054A CN 202111217901 A CN202111217901 A CN 202111217901A CN 114000054 A CN114000054 A CN 114000054A
- Authority
- CN
- China
- Prior art keywords
- equal
- less
- percent
- continuous casting
- steel
- 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 61
- 239000010959 steel Substances 0.000 title claims abstract description 61
- 238000009749 continuous casting Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000008569 process Effects 0.000 title claims abstract description 25
- 238000003723 Smelting Methods 0.000 title claims abstract description 23
- 239000010936 titanium Substances 0.000 claims abstract description 26
- 238000010079 rubber tapping Methods 0.000 claims abstract description 19
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 18
- 238000005266 casting Methods 0.000 claims abstract description 16
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910000805 Pig iron Inorganic materials 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims abstract description 7
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 7
- 229910000604 Ferrochrome Inorganic materials 0.000 claims abstract description 6
- 229910000616 Ferromanganese Inorganic materials 0.000 claims abstract description 6
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 claims abstract description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 30
- 239000007789 gas Substances 0.000 claims description 16
- 238000005070 sampling Methods 0.000 claims description 16
- 229910052786 argon Inorganic materials 0.000 claims description 15
- 239000011575 calcium Substances 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 15
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 12
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 12
- 239000004571 lime Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 7
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 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
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 238000000137 annealing Methods 0.000 claims description 4
- 239000002893 slag Substances 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
- 239000003575 carbonaceous material Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 230000004907 flux Effects 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
- 230000007797 corrosion Effects 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 239000002994 raw material Substances 0.000 abstract description 3
- 238000007670 refining Methods 0.000 abstract 2
- 239000002699 waste material Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000006872 improvement Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910052718 tin Inorganic materials 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
-
- 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
- C21C7/072—Treatment with gases
-
- 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
- C22C33/04—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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
-
- 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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
-
- 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
本发明涉及一种GCr15SiMn轴承钢连铸坯及其冶炼连铸工艺,采用EAF~LF~VD~CC工艺,原料由废钢、钢屑、生铁、碳料头及低钛高碳铬铁、高碳锰铁、硅铁组成,EAF炉成分满足[C]≤0.70%,[P]≤0.010%,[Mo]≤0.10%,[Ti]≤0.001%,[Pb]≤0.002%出钢至精炼,精炼使用低钛高碳铬铁、高碳锰铁、硅铁调整成分,[C]:0.95~1.00%,[Si]:0.50~0.60%,[Mn]:1.05~1.15%,[P]≤0.015%,[S]≤0.010%,[Cr]:1.45~1.55%,[Al]:0.020~0.035%转VD脱气,脱气后转立式连铸浇钢,连铸中间包过热度15~25℃,设定拉速0.50m/min,结晶器水量2500L/min,二冷制度采用强冷,结晶器电搅,铸流电搅,使用H‑4保护渣,连铸坯退火处理,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。
Description
技术领域
本发明属于炼钢技术领域,具体涉及一种使用立式连铸生产的GCr15SiMn轴承钢连铸坯及其冶炼连铸工艺。
背景技术
GCr15SiMn是一种常用的轴承钢,因[O]、[Ti]、[Ca]含量控制严格,多采用高炉冶炼、弧形连铸生产。随着废钢产出的不断增加、废钢进口的恢复,以废钢为主要原料的电炉炼钢产业日益扩大,高炉冶炼生产的长流程工艺与电炉冶炼生产的短流程工艺技术逐步融合发展,开发出GCr15SiMn高碳轴承钢电炉短流程工艺技术标志着电炉冶炼技术水平的突破性提升。
电炉采用全废钢冶炼技术难点为难以满足轴承钢低[O]、低[Ti]、低[Ca]含量的控制,另外因GCr15SiMn碳含量高,冷却制度控制不当、弧形连铸被拉矫机矫直存在压应力,铸坯表面容易出现裂纹。
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使用电炉全废钢冶炼、立式连铸生的GCr15SiMn轴承钢连铸坯及其冶炼连铸工艺。
为了实现上述目的,本发明采用如下技术方案:
一种GCr15SiMn轴承钢连铸坯,采用EAF~LF~VD~CC立式连铸工艺路线按照重量百分比生产的GCr15SiMn的成分如下:[C]:0.95~1.05%,[Si]:0.45~0.75%,[Mn]:0.95~1.25%,[P]≤0.020%,[S]≤0.020%,[Cr]:1.45~1.65%,[Mo]≤0.10%,[Ni]≤0.25%,[Cu]≤0.25%,[Al]≤0.050%,[Ti]≤0.005%,[Ca]≤0.001%,[As]≤0.020%、[Pb]≤0.002%,铸坯[H]≤1.5ppm、铸坯[O]≤12ppm,[As]+[Sn]+[Pb]≤0.025%。
一种上述的GCr15SiMn轴承钢连铸坯的冶炼连铸工艺,按照如下工艺步骤进行:
步骤1)、在EAF炉内加入废钢、钢屑、生铁或碳料头作为钢铁料送电熔化,熔化期间加入增碳剂15~25Kg/t,熔清后加入白灰15~25Kg/t吹氧,吹氧量达到20m3/t流渣,温度≥1580℃取样,出钢控制[C]≤0.70%,[P]≤0.010%,[Mo]≤0.10%,[Ni]≤0.25%,[Cu]≤0.25%,[Ti]≤0.001%,[Pb]≤0.002%,[As]≤0.010%,[Sn]≤0.008%,控制出钢温度在1630~1660℃之间,出钢过程中向钢包内加入铝块1~3kg/t、石灰4~7kg/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4~7Kg/t、电石1~2Kg/t、碳粉和硅铁粉2~4Kg/t,送电20min取样,根据第一次取样结果,加入6~10Kg/t硅铁调整Si含量,加入15~19Kg/t高碳锰铁调整Mn含量,加入26~31Kg/t低钛高碳铬铁调整Cr含量,加入0.6Kg/t铝块调整Al含量;合金加入完毕,加入碳粉1~2Kg/t、硅铁粉1~2Kg/t,送电20min取样,根据取样成分,微调[C]、[Si]、[Mn]、[Cr],控制[C]:0.95~1.00%,[Si]:0.50~0.60%,[Mn]:1.05~1.15%,[P]≤0.015%,[S]≤0.010%,[Cr]:1.45~1.55%,[Mo]≤0.10%,[Ni]≤0.25%,[Cu]≤0.25%,[Al]:0.020~0.035%,[Ti]≤0.005%,[Ca]≤0.001%,控制温度在1570~1600℃转入VD抽气,抽气不再加白灰;
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1570~1600℃、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,在0.7mbar下保持时间≥20min后破空、抬盖,取样、定[H]、定[O],控制[C]:0.95~1.00%,[Si]:0.50~0.60%,[Mn]:1.05~1.15%,[P]≤0.015%,[S]≤0.010%,[Cr]:1.45~1.55%,[Mo]≤0.10%,[Ni]≤0.25%,[Cu]≤0.25%,[Al]:0.010~0.030%,[Ti]≤0.005%,[Ca]≤0.001%,[As]≤0.010%、[Pb]≤0.002%,[Sn]≤0.008%,定[H]≤1.5ppm、定[O]≤5ppm,弱搅拌时间≥15min,首炉出钢温度控制在1502~1512℃,连浇炉次出钢温度1497~1507℃,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0.50m/min,结晶器水量2500L/min,二冷制度采用强冷,结晶器电搅参数:电流600A、频率5HZ,铸流电搅参数:电流300A、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、生铁、碳料头为无油污、无严重锈蚀的钢铁料。
本发明的技术方案产生的积极效果如下:本发明涉及一种采用电炉短流程+立式连铸生产Φ400mm规格的GCr15SiMn轴承钢连铸坯及其冶炼连铸工艺,采用EAF~LF~VD~CC立式连铸的工艺路线,原料由废钢、钢屑、生铁、碳料头等钢铁料及低钛高碳铬铁、高碳锰铁、硅铁组成,电炉熔化钢铁料得到[C]≤0.70%,[P]≤0.010%,[Mo]≤0.10%,[Ni]≤0.25%,[Cu]≤0.25%,[Ti]≤0.001%,[Pb]≤0.002%,[As]≤0.010%,[Sn]≤0.008%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]:0.95~1.00%,[Si]:0.50~0.60%,[Mn]:1.05~1.15%,[P]≤0.015%,[S]≤0.010%,[Cr]:1.45~1.55%,[Mo]≤0.10%,[Ni]≤0.25%,[Cu]≤0.25%,[Al]:0.020~0.035%,[Ti]≤0.005%,[Ca]≤0.001%的钢水,经VD脱气,去除钢液中的气体,最终得到成分符合[C]:0.95~1.00%,[Si]:0.50~0.60%,[Mn]:1.05~1.15%,[P]≤0.015%,[S]≤0.010%,[Cr]:1.45~1.55%,[Mo]≤0.10%,[Ni]≤0.25%,[Cu]≤0.25%,[Al]:0.010~0.030%,[Ti]≤0.005%,[Ca]≤0.001%,[As]≤0.010%、[Pb]≤0.002%,[Sn]≤0.008%,定[H]≤1.5ppm、定[O]≤5ppm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0.50m/min,结晶器水量2500L/min,二冷制度采用强冷,结晶器电搅参数:电流600A、频率5HZ,铸流电搅参数:电流300A、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Φ400mm规格GCr15SiMn,具有如下优点:
(1)控制较低的[O]、[Ti]、[Ca]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。
具体实施方式
实施例1:一种采用立式连铸生产Φ400mm规格的GCr15SiMn轴承钢连铸坯及其冶炼连铸工艺,采用EAF~LF~VD~CC立式连铸工艺路线,GCr15SiMn的成分如下:[C]:0.95~1.05%,[Si]:0.45~0.75%,[Mn]:0.95~1.25%,[P]≤0.020%,[S]≤0.020%,[Cr]:1.45~1.65%,[Mo]≤0.10%,[Ni]≤0.25%,[Cu]≤0.25%,[Al]≤0.050%,[Ti]≤0.005%,[Ca]≤0.001%,[As]≤0.020%、[Pb]≤0.002%,铸坯[H]≤1.5ppm、铸坯[O]≤12ppm,[As]+[Sn]+[Pb]≤0.025%。
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400~450Kg/t、生铁200~240Kg/t、碳料头140~200Kg/t等钢铁料送电熔化,熔化期间加入增碳剂15~25Kg/t,熔清后加入白灰15~25Kg/t吹氧,吹氧量达到20m3/t流渣,温度≥1580℃取样,出钢控制[C]≤0.70%,[P]≤0.010%,[Mo]≤0.10%,[Ni]≤0.25%,[Cu]≤0.25%,[Ti]≤0.001%,[Pb]≤0.002%,[As]≤0.010%,[Sn]≤0.008%,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,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4~7Kg/t、电石1~2Kg/t、碳粉和硅铁粉2~4Kg/t,送电20min取样,根据第一次取样结果,加入6~10Kg/t硅铁调整Si含量,加入15~19Kg/t高碳锰铁调整Mn含量,加入26~31Kg/t低钛高碳铬铁调整Cr含量,加入0.6Kg/t铝块调整Al含量。合金加入完毕,加入碳粉1~2Kg/t、硅铁粉1~2Kg/t,送电20min取样,根据取样成分,微调[C]、[Si]、[Mn]、[Cr],控制[C]:0.95~1.00%,[Si]:0.50~0.60%,[Mn]:1.05~1.15%,[P]≤0.015%,[S]≤0.010%,[Cr]:1.45~1.55%,[Mo]≤0.10%,[Ni]≤0.25%,[Cu]≤0.25%,[Al]:0.020~0.035%,[Ti]≤0.005%,[Ca]≤0.001%,温度1570~1600℃转入VD抽气,抽气不再加白灰。
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1570~1600℃、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后破空、抬盖,取样、定[H]、定[O],控制[C]:0.95~1.00%,[Si]:0.50~0.60%,[Mn]:1.05~1.15%,[P]≤0.015%,[S]≤0.010%,[Cr]:1.45~1.55%,[Mo]≤0.10%,[Ni]≤0.25%,[Cu]≤0.25%,[Al]:0.010~0.030%,[Ti]≤0.005%,[Ca]≤0.001%,[As]≤0.010%、[Pb]≤0.002%,[Sn]≤0.008%,定[H]≤1.5ppm、定[O]≤5ppm,弱搅拌时间≥15min,首炉出钢温度1502~1512℃,连浇炉次出钢温度1497~1507℃,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0.50m/min,结晶器水量2500L/min,二冷制度采用强冷,结晶器电搅参数:电流600A、频率5HZ,铸流电搅参数:电流300A、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两炉冶炼,两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%
元素 | 目标成分 | 本实施例1 | 本实施例2 |
C | 0.95~1.05% | 0.99% | 0.98% |
Si | 0.45~0.75% | 0.53% | 0.53% |
Mn | 0.95~1.25% | 1.10% | 1.06% |
P | ≤0.020% | 0.015% | 0.015% |
S | ≤0.020% | 0.002% | 0.002% |
Cr | 1.45~1.65% | 1.54% | 1.50% |
Mo | ≤0.10% | 0.05% | 0.05% |
Ni | ≤0.25% | 0.11% | 0.13% |
Cu | ≤0.25% | 0.08% | 0.08% |
Al | ≤0.050% | 0.019% | 0.017% |
Ti | ≤0.005% | 0.003% | 0.003% |
Ca | ≤0.001% | 0.0007% | 0.001% |
As | ≤0.020% | 0.009% | 0.009% |
Pb | ≤0.002% | 0.0005% | 0.0008% |
VD定H | ≤1.5ppm | 1.1ppm | 0.9ppm |
VD定O | ≤5ppm | 2.2ppm | 2.6ppm |
成品H | ≤1.5ppm | 1.02ppm | 0.67ppm |
成品O | ≤12ppm | 6.50ppm | 5.47ppm |
As+Sn+Pb | ≤0.025% | 0.015% | 0.015% |
本冶炼工艺适用于立式连铸生产Φ400mm规格GCr15SiMn冶炼。
Claims (3)
1.一种GCr15SiMn轴承钢连铸坯,其特征在于:采用EAF~LF~VD~CC立式连铸工艺路线按照重量百分比生产的GCr15SiMn的成分如下:[C]:0.95~1.05%,[Si]:0.45~0.75%,[Mn]:0.95~1.25%,[P]≤0.020%,[S]≤0.020%,[Cr]:1.45~1.65%,[Mo]≤0.10%,[Ni]≤0.25%,[Cu]≤0.25%,[Al]≤0.050%,[Ti]≤0.005%,[Ca]≤0.001%,[As]≤0.020%、[Pb]≤0.002%,铸坯[H]≤1.5ppm、铸坯[O]≤12ppm ,[As]+[Sn]+[Pb]≤0.025%。
2.一种如权利要求1所述的GCr15SiMn轴承钢连铸坯的冶炼连铸工艺,其特征在于:按照如下工艺步骤进行:
步骤1)、在EAF炉内加入废钢、钢屑、生铁或碳料头作为钢铁料送电熔化,熔化期间加入增碳剂15~25Kg/t,熔清后加入白灰15~25Kg/t吹氧,吹氧量达到20m3/t流渣,温度≥1580℃取样,出钢控制[C]≤0.70%,[P]≤0.010%,[Mo]≤0.10%,[Ni]≤0.25%,[Cu]≤0.25% ,[Ti]≤0.001%,[Pb]≤0.002%,[As]≤0.010%,[Sn]≤0.008%,控制出钢温度在1630~1660℃之间,出钢过程中向钢包内加入铝块1~3kg/t、石灰4~7kg/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4~7Kg/t、电石1~2Kg/t、碳粉和硅铁粉2~4Kg/t,送电20min取样,根据第一次取样结果,加入6~10Kg/t硅铁调整Si含量,加入15~19Kg/t高碳锰铁调整Mn含量,加入26~31Kg/t低钛高碳铬铁调整Cr含量,加入0.6Kg/t铝块调整Al含量;合金加入完毕,加入碳粉1~2Kg/t、硅铁粉1~2Kg/t,送电20min取样,根据取样成分,微调[C]、[Si]、[Mn]、[Cr],控制[C]:0.95~1.00%,[Si]:0.50~0.60%,[Mn]:1.05~1.15%,[P]≤0.015%,[S]≤0.010%,[Cr]:1.45~1.55%,[Mo]≤0.10%,[Ni]≤0.25%,[Cu]≤0.25%,[Al]:0.020~0.035%,[Ti]≤0.005%,[Ca]≤0.001%,控制温度在1570~1600℃转入VD抽气,抽气不再加白灰;
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1570~1600℃、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,在0.7mbar下保持时间≥20min后破空、抬盖,取样、定[H]、定[O],控制[C]:0.95~1.00%,[Si]:0.50~0.60%,[Mn]:1.05~1.15%,[P]≤0.015%,[S]≤0.010%,[Cr]:1.45~1.55%,[Mo]≤0.10%,[Ni]≤0.25%,[Cu]≤0.25%,[Al]:0.010~0.030%,[Ti]≤0.005%,[Ca]≤0.001%,[As]≤0.010%、[Pb]≤0.002%,[Sn]≤0.008%,定[H]≤1.5ppm、定[O]≤5ppm,弱搅拌时间≥15min,首炉出钢温度控制在1502~1512℃,连浇炉次出钢温度1497~1507℃,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0.50m/min,结晶器水量2500L/min,二冷制度采用强冷,结晶器电搅参数:电流600A、频率5HZ,铸流电搅参数:电流300A、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GCr15SiMn轴承钢连铸坯的冶炼连铸工艺,其特征在于:在步骤1)中,所使用的废钢、钢屑、生铁、碳料头为无油污、无严重锈蚀的钢铁料。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111217901.2A CN114000054A (zh) | 2021-10-19 | 2021-10-19 | GCr15SiMn轴承钢连铸坯及其冶炼连铸工艺 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111217901.2A CN114000054A (zh) | 2021-10-19 | 2021-10-19 | GCr15SiMn轴承钢连铸坯及其冶炼连铸工艺 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN114000054A true CN114000054A (zh) | 2022-02-01 |
Family
ID=79923230
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202111217901.2A Pending CN114000054A (zh) | 2021-10-19 | 2021-10-19 | GCr15SiMn轴承钢连铸坯及其冶炼连铸工艺 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN114000054A (zh) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115287546A (zh) * | 2022-09-17 | 2022-11-04 | 河南中原特钢装备制造有限公司 | 高压气瓶管用4130x钢及其冶炼连铸生产工艺 |
CN116574965A (zh) * | 2023-07-11 | 2023-08-11 | 江苏永钢集团有限公司 | 一种提高风电钢夹杂物水平的方法 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104561730A (zh) * | 2014-12-22 | 2015-04-29 | 天津钢铁集团有限公司 | 一种GCr15轴承钢小方坯的生产方法 |
-
2021
- 2021-10-19 CN CN202111217901.2A patent/CN114000054A/zh active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104561730A (zh) * | 2014-12-22 | 2015-04-29 | 天津钢铁集团有限公司 | 一种GCr15轴承钢小方坯的生产方法 |
Non-Patent Citations (2)
Title |
---|
傅杰: "《特种熔炼与冶金质量控制》", 31 January 1999, 冶金工业出版社 * |
周旺松等: "形变温度对GCr15SiMn钢网状碳化物演化行为的影响", 《钢铁》 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115287546A (zh) * | 2022-09-17 | 2022-11-04 | 河南中原特钢装备制造有限公司 | 高压气瓶管用4130x钢及其冶炼连铸生产工艺 |
CN116574965A (zh) * | 2023-07-11 | 2023-08-11 | 江苏永钢集团有限公司 | 一种提高风电钢夹杂物水平的方法 |
CN116574965B (zh) * | 2023-07-11 | 2023-09-15 | 江苏永钢集团有限公司 | 一种提高风电钢夹杂物水平的方法 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN111593257B (zh) | 一种高韧性、高热稳定性热作模具钢及其制备方法 | |
CN104532102B (zh) | 风电用大规格渗碳轴承钢G20Cr2Ni4A制造工艺 | |
CN102021488B (zh) | 核岛无缝钢管用钢及其生产方法 | |
CN104862443A (zh) | 一种低碳低硅焊丝钢的冶炼方法 | |
CN114000052A (zh) | 高压锅炉管用钢p92模铸圆锭及其冶炼工艺 | |
CN114000054A (zh) | GCr15SiMn轴承钢连铸坯及其冶炼连铸工艺 | |
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 | |
CN108893682B (zh) | 模具钢钢坯及其制备方法 | |
CN105002324B (zh) | 一种控制重轨钢点状夹杂物的方法 | |
CN110592312B (zh) | 一种高速车轴用钢的制备方法 | |
CN111118409A (zh) | 一种阀箱用低碳马氏体不锈钢及其冶炼方法 | |
CN106011671B (zh) | 一种h13连铸方坯的生产方法 | |
CN110541115A (zh) | 一种奥氏体不锈钢§150小规格连铸圆管坯制造方法 | |
CN116422853B (zh) | 一种模具钢及其连铸生产方法 | |
CN113770316A (zh) | 一种低碳、低铝、高铬钢锻圆探伤合格率提升方法 | |
CN108286020B (zh) | 一种可用于制造大型结构部件的特厚高强高致密度钢板及其制造方法 | |
CN113684412A (zh) | 一种塑料模具钢zw636的生产方法 | |
CN113462971A (zh) | 一种热作模具大圆坯及其制备方法 | |
CN110699593A (zh) | 一种32Cr3Mo1V钢铸轧辊套的熔融装置及其钢铸轧辊套生产工艺 | |
CN114959183B (zh) | 一种基于铝脱氧Cr5支承辊钢的精炼渣系及其应用工艺 | |
CN113430449B (zh) | 含硫易切削钢astm1141冶炼及连铸生产工艺 | |
CN117187676A (zh) | 一种超高压管用合金结构钢冶炼及连铸生产工艺 | |
CN114000057A (zh) | 加稀土冶炼的mc6c轧辊用钢及其冶炼连铸工艺 | |
CN114000033B (zh) | 一种电极棒母材的冶炼方法以及该电极棒母材在电渣重熔G20Cr2Ni4E钢中的应用 | |
CN115838845B (zh) | 光伏玻璃制造用压延辊20CrNiMo钢的冶炼工艺 |
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 |