WO2022083102A1 - 一种低铝高钛焊丝钢及其冶炼方法 - Google Patents
一种低铝高钛焊丝钢及其冶炼方法 Download PDFInfo
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- WO2022083102A1 WO2022083102A1 PCT/CN2021/091368 CN2021091368W WO2022083102A1 WO 2022083102 A1 WO2022083102 A1 WO 2022083102A1 CN 2021091368 W CN2021091368 W CN 2021091368W WO 2022083102 A1 WO2022083102 A1 WO 2022083102A1
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- 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
- 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
- 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
- C22C38/02—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
- C22C38/06—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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
Definitions
- the invention belongs to the technical field of iron and steel smelting, in particular to a low-aluminum and high-titanium welding wire steel and a smelting method thereof.
- Welding wire steel has very strict requirements on composition, and it is difficult to control smelting. Titanium-containing welding steel is based on ordinary welding steel by adding titanium and other elements, which can reduce the spatter during the welding process. The weld metal has good plasticity and toughness, the arc is stable and soft, and the weld is beautiful.
- the smelting process mainly has the following problems: 1) Lower carbon content Control, the addition of alloys in converter tapping and refining and heating will increase the carbon content of molten steel, and the carbon content of the finished product needs to be controlled to 0.05-0.07%; 2)
- the titanium element has strong metallic properties, and is easily oxidized during the smelting process, and the yield of titanium is low.
- the molten steel is only deoxidized by silicon-manganese, and it is difficult to control the titanium content stably; 3) Titanium is very easy to oxidize, and the nozzle and plug rod are easy to accumulate titanium oxide inclusions during the continuous casting process It can not be produced continuously.
- the welding wire steel with a titanium content of 0.20% is mainly produced by die casting. above the furnace.
- CN103045946A (published date: 20130417) "A kind of steel for high titanium alloy welding wire and its preparation method", the method adds rare earth elements, suppresses the oxidation of titanium in the welding wire steel during continuous casting and welding, controls the titanium content of the finished product to be ⁇ 0.18%, and the aluminum Content ⁇ 0.10%.
- rare earth elements are added, and the price is high, which increases the cost of steelmaking.
- the titanium content of the welding wire steel produced by this method is not high at 0.15-0.18%; the aluminum and iron are deeply deoxidized in the tapping process, and the aluminum content in the product process and finished product is relatively high. , unable to achieve low aluminum control.
- the present invention provides a low-aluminum and high-titanium welding wire steel and a smelting method thereof, which is a simple and easy-to-control smelting method, realizes stable control of the composition of the low-aluminum and high-titanium welding wire steel, and greatly improves the low The performance of continuous casting of aluminum high titanium wire steel reduces production costs.
- a smelting method for low-aluminum and high-titanium welding wire steel comprising the following steps:
- Step S1 converter tapping deoxidation and alloying: control the carbon content in the molten steel to be ⁇ 0.04% at the end point of converter smelting, and the molten steel temperature to be ⁇ 1600°C.
- the converter is tapping, add high-silicon manganese and high-purity ferrosilicon in sequence for deoxidation and alloying, and then sequentially Lime and fluorite are added; the carbon content of the high-silicon silico-manganese is ⁇ 0.3%, the silicon content is 25.0-28.0%, and the manganese content is 60.0-67.0%; the aluminum content of the high-purity ferrosilicon is ⁇ 0.03%, and the carbon content is ⁇ 0.03%. ⁇ 0.05%, silicon content ⁇ 75.0%; after the steel is finished, the silicon content in the steel is controlled at 0.70-0.80%, the manganese content is controlled at 1.35-1.45%, and the total aluminum content is controlled at ⁇ 0.004%;
- Step S2 LF refining: in the early stage of refining, lime and fluorite are added to the LF furnace according to the fluidity of the refining slag to ensure that the refining slag has good fluidity; calcium carbide and ferrosilicon powder are added in multiple batches to deoxidize the slag surface when the refining slag is energized for the first time.
- the flow of argon gas in the process is controlled at 120-180NL/min; after electrifying for a period of time, preferably, sampling is performed for 12-17 minutes after electrification, and high-purity ferrosilicon and metal manganese are added to adjust the composition to the target value according to the test results; the metal manganese The carbon content is less than or equal to 0.05%, and the manganese content is greater than or equal to 96.5%; after the alloy is added to the end of refining, ferrosilicon powder is added to maintain the reducibility of the refining slag, and the argon gas flow is controlled at 40-80NL/min; Wire to make the titanium content reach the target value, and supplement the sulfur wire according to the test results and then perform soft blowing.
- the argon flow is controlled at 15-25NL/min. After soft blowing for 5-10min The aluminum content is less than or equal to 0.6%, and the titanium content is 65.0-75.0%; the ladle is poured within 15-20 minutes after feeding the titanium-iron wire, and the superheat of the continuous pouring furnace is 35-50 °C to ensure the pouring performance of the molten steel.
- the total amount of lime added during the converter tapping is 7.0-8.0 kg per ton of molten steel, and the total amount of fluorite is 2.0-2.5 kg per ton of molten steel.
- step S1 high silicon manganese and high-purity ferrosilicon are sequentially added for deoxidation and alloying when 1/3 of the converter is tapped, and then lime and fluorite are added in sequence to prevent premature alloying from forming at the bottom. yuan.
- the total amount of lime added during refining is 0-2.0 kg per ton of molten steel, and the total amount of fluorite is 0-1.0 kg per ton of molten steel.
- step S2 sampling is performed after 15 minutes of electrification.
- the slag-forming time in the early stage of refining is less than or equal to 15min
- the total amount of calcium carbide added in the first power-on refining is 0.2-0.4 kg per ton of molten steel
- the total amount of ferrosilicon powder is 1.2-1.6 kg per ton of molten steel.
- the total amount of ferrosilicon powder added after the alloy is added to the end of refining is 0.4 to 0.6 kg per ton of molten steel.
- the total amount of ferrosilicon powder added after the alloy is added to the end of refining in the step S2 and the step S2 is 0.4-0.6 kg per ton of molten steel.
- a low-aluminum and high-titanium welding wire steel obtained according to the low-aluminum and high-titanium welding wire steel smelting method obtained according to the low-aluminum and high-titanium welding wire steel smelting method.
- the beneficial effects of the present invention are: the smelting process of the present invention can stably control the carbon content at 0.05-0.07%, the aluminum content at ⁇ 0.007%, the sulfur content at 0.008-0.012%, and the titanium content at 0.008-0.012%.
- the stability is controlled at 0.18-0.23%; the present invention optimizes the feeding method and timing of the iron-titanium wire by feeding the iron-titanium wire at one time in the later stage of refining, and solves the problem of nodules of the nozzle and the stopper rod, and the number of continuous pouring furnaces can reach 16 furnaces,
- the oxygen content of the rolled material is controlled to ⁇ 20ppm, and the average oxygen content is 15ppm.
- the invention is a smelting method with simple process and easy control, realizes stable control of the composition of the low-aluminum and high-titanium welding wire steel, greatly improves the continuous casting performance of the low-aluminum and high-titanium welding wire steel, and reduces the production cost.
- What the present invention needs is the conventional equipment for converter smelting high-quality steel, which further reduces the production cost.
- a smelting method for low-aluminum and high-titanium welding wire steel comprising the following steps:
- the chemical composition of the obtained low-aluminum and high-titanium welding wire steel is: C: 0.07%, Si: 0.88%, Mn: 1.54%, P: 0.009%, S: 0.010%, Ti: 0.18%, Al: 0.005%, Ca: 0.0002%, the balance is Fe and inevitable impurities; the oxygen content of the rolled material is 18ppm, and the number of continuous casting furnaces in this group has reached 15 furnaces.
- a smelting method for low-aluminum and high-titanium welding wire steel comprising the following steps:
- LF refining process add 114kg lime during the refining process, add 20kg calcium carbide and 60kg ferrosilicon powder in multiple batches to the slag surface during the first electrification process, and control the flow of argon at 120-180NL/min.
- the exit temperature is 1580 °C
- 18 min after feeding the titanium iron wire is poured
- the 8th furnace is continuously poured
- the superheat degree is 40 °C.
- the chemical composition of the obtained low-aluminum and high-titanium welding wire steel is: C: 0.06%, Si: 0.87%, Mn: 1.52%, P: 0.015%, S: 0.009%, Ti: 0.22%, Al: 0.005%, Ca: 0.0003%, the balance is Fe and inevitable impurities; the oxygen content of the rolled material is 15ppm, and the number of continuous casting furnaces in this group has reached 16 furnaces.
- a smelting method for low-aluminum and high-titanium welding wire steel comprising the following steps:
- LF refining process 159.87kg lime is added during the refining process, 20kg calcium carbide and 70kg ferrosilicon powder are added in multiple batches of slag surface deoxidation during the first electrification process, and the argon gas flow is controlled at 120-180NL/min during the process, and the electricity is electrified.
- the chemical composition of the obtained low-aluminum and high-titanium welding wire steel is: C: 0.05%, Si: 0.82%, Mn: 1.51%, P: 0.014%, S: 0.008%, Ti: 0.23%, Al: 0.006%, Ca: 0.0003%, the balance is Fe and inevitable impurities; the oxygen content of the rolled material is 18ppm, and the number of continuous pouring furnaces in this group has reached 16 furnaces.
- a smelting method for low-aluminum and high-titanium welding wire steel comprising the following steps:
- LF refining process add 106kg lime and 36kg fluorite during refining, add 20kg calcium carbide and 60kg ferrosilicon powder to slag surface deoxidation in multiple batches during the first electrification process, and control the flow of argon at 120-180NL/ min, energize for 15 minutes, take samples for testing, and add 10kg of high-purity ferrosilicon and 15kg of metal manganese to adjust the composition to the target value according to the test results; after the alloy is added, 40kg of ferrosilicon powder is added to the end of refining to maintain the reducibility of the refining slag, and argon gas is used during the process.
- the flow rate is controlled at 40-80NL/min; after the refining, 840 meters of titanium iron wire is fed at one time to make the titanium content reach the target value, and then soft blowing is performed. 15 ⁇ 25NL/min, after soft blowing for 8 minutes, go to the continuous casting machine, the exit temperature is 1592 °C, 20 minutes after feeding the titanium iron wire, the ladle is poured, and the 9th furnace is continuously poured, and the superheat degree is 50 °C.
- the chemical composition of the obtained low-aluminum and high-titanium welding wire steel is: C: 0.06%, Si: 0.89%, Mn: 1.50%, P: 0.013%, S: 0.008%, Ti: 0.22%, Al: 0.007%, Ca: 0.0003%, the balance is Fe and inevitable impurities; the oxygen content of the rolled material is 14ppm, and the number of continuous casting furnaces in this group has reached 15 furnaces.
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- Engineering & Computer Science (AREA)
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- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
Description
Claims (5)
- 一种低铝高钛焊丝钢冶炼方法,其特征在于,所述低铝高钛焊丝钢的化学成分按照重量百分比计算:C:0.05~0.07%,Si:0.80~0.90%,Mn:1.48~1.55%,P≤0.018%,S:0.008~0.012%,Ti:0.18~0.23%,Al≤0.007%,Ca≤0.0010%,余量为Fe和不可避免的杂质;该方法包括以下步骤:步骤S1、转炉出钢脱氧合金化:转炉冶炼终点控制钢水中碳含量≤0.04%,钢水温度≥1600℃,转炉出钢时依次加入高硅硅锰、高纯硅铁进行脱氧合金化,再依次加入石灰、萤石;所述高硅硅锰的碳含量≤0.3%,硅含量为25.0~28.0%,锰含量为60.0~67.0%;所述高纯硅铁的铝含量≤0.03%,碳含量≤0.05%,硅含量≥75.0%;转炉出钢时加入的石灰总量为每吨钢水7.0~8.0kg,萤石总量为每吨钢水2.0~2.5kg;出完钢后,钢中的硅含量控制在0.70~0.80%,锰含量控制在1.35~1.45%,全铝含量控制≤0.004%;步骤S2、LF精炼:精炼前期LF炉根据精炼渣流动性加入石灰和萤石;精炼前期成渣时间≤15min,精炼第一次通电分多批次加入电石和硅铁粉进行渣面脱氧,精炼第一次通电加入的电石总量为每吨钢水0.2~0.4kg,硅铁粉总量为每吨钢水1.2~1.6kg,过程氩气流量控制在120~180NL/min;通电12-17分钟后取样化验,并根据化验结果加入高纯硅铁和金属锰调整成分至目标值;所述金属锰的碳含量≤0.05%,锰含量≥96.5%;合金加入后至精炼结束加入硅铁粉保持精炼渣还原性,过程氩气流量控制在40~80NL/min;精炼后期,一次性喂入钛铁线使钛含量至目标值,并根据化验结果硫含量补位硫磺线后进行软吹,氩气流量控制在15~25NL/min,软吹5~10min后上机连铸;所述钛铁线的铝含量≤0.6%,钛含量为65.0~75.0%;在喂入钛铁线后15-20min内大包开浇,连浇炉次过热度为35~50℃。
- 根据权利要求1所述的低铝高钛焊丝钢冶炼方法,其特征在于,所述步骤S1中,转炉出钢1/3时依次加入高硅硅锰、高纯硅铁进行脱氧合金化,再依次加入石灰、萤石。
- 根据权利要求1所述的低铝高钛焊丝钢冶炼方法,其特征在于,所述步骤S2中,精炼时加入的石灰总量为每吨钢水0~2.0kg,萤石总量为每吨钢水0~1.0kg。
- 根据权利要求1所述的低铝高钛焊丝钢冶炼方法,其特征在于,所述步骤S2中,通电15分钟后取样化验。
- 根据权利要求1所的述低铝高钛焊丝钢冶炼方法,其特征在于,所述步骤S2中合金加入 后至精炼结束加入的硅铁粉总量为每吨钢水0.4~0.6kg。
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CN115007821A (zh) * | 2022-05-07 | 2022-09-06 | 建龙北满特殊钢有限责任公司 | 一种大方坯GCr15SiMn轴承钢及其冶炼方法 |
CN115404395A (zh) * | 2022-08-29 | 2022-11-29 | 包头钢铁(集团)有限责任公司 | 一种小方坯工艺生产高锰、高钛桶装埋弧焊丝钢冶炼制备方法 |
CN115466906A (zh) * | 2022-09-09 | 2022-12-13 | 中天钢铁集团有限公司 | 一种低渣量的轴承钢冶炼工艺 |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20020049916A (ko) * | 2000-12-20 | 2002-06-26 | 이구택 | 용접구조용 강의 제조방법 |
CN104831014A (zh) * | 2015-03-31 | 2015-08-12 | 青岛钢铁控股集团有限责任公司 | 一种高钛特种焊丝钢的冶炼方法 |
CN110438286A (zh) * | 2019-09-04 | 2019-11-12 | 鞍钢股份有限公司 | 一种控制焊丝钢连铸坯表面裂纹方法 |
CN112011718A (zh) * | 2020-10-22 | 2020-12-01 | 江苏永钢集团有限公司 | 一种低铝高钛焊丝钢及其冶炼方法 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104259414A (zh) * | 2014-09-16 | 2015-01-07 | 河北钢铁股份有限公司唐山分公司 | 一种减轻连铸水口结瘤的含钛焊丝用钢生产方法 |
CN110343807A (zh) * | 2018-04-02 | 2019-10-18 | 潍坊特钢集团有限公司 | 一种er50-6e系列低碳钢冶炼脱氧工艺 |
-
2020
- 2020-10-22 CN CN202011136088.1A patent/CN112011718B/zh active Active
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- 2021-04-30 WO PCT/CN2021/091368 patent/WO2022083102A1/zh active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20020049916A (ko) * | 2000-12-20 | 2002-06-26 | 이구택 | 용접구조용 강의 제조방법 |
CN104831014A (zh) * | 2015-03-31 | 2015-08-12 | 青岛钢铁控股集团有限责任公司 | 一种高钛特种焊丝钢的冶炼方法 |
CN110438286A (zh) * | 2019-09-04 | 2019-11-12 | 鞍钢股份有限公司 | 一种控制焊丝钢连铸坯表面裂纹方法 |
CN112011718A (zh) * | 2020-10-22 | 2020-12-01 | 江苏永钢集团有限公司 | 一种低铝高钛焊丝钢及其冶炼方法 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115007821A (zh) * | 2022-05-07 | 2022-09-06 | 建龙北满特殊钢有限责任公司 | 一种大方坯GCr15SiMn轴承钢及其冶炼方法 |
CN115404395A (zh) * | 2022-08-29 | 2022-11-29 | 包头钢铁(集团)有限责任公司 | 一种小方坯工艺生产高锰、高钛桶装埋弧焊丝钢冶炼制备方法 |
CN115466906A (zh) * | 2022-09-09 | 2022-12-13 | 中天钢铁集团有限公司 | 一种低渣量的轴承钢冶炼工艺 |
CN115466906B (zh) * | 2022-09-09 | 2023-10-03 | 中天钢铁集团有限公司 | 一种低渣量的轴承钢冶炼工艺 |
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