CN116640993A - 一种低硫磷的高锰埋弧焊丝用钢及其制备方法 - Google Patents
一种低硫磷的高锰埋弧焊丝用钢及其制备方法 Download PDFInfo
- Publication number
- CN116640993A CN116640993A CN202310607436.6A CN202310607436A CN116640993A CN 116640993 A CN116640993 A CN 116640993A CN 202310607436 A CN202310607436 A CN 202310607436A CN 116640993 A CN116640993 A CN 116640993A
- Authority
- CN
- China
- Prior art keywords
- percent
- equal
- low
- steel
- less
- 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 48
- 239000010959 steel Substances 0.000 title claims abstract description 48
- 238000003466 welding Methods 0.000 title claims abstract description 32
- 239000011572 manganese Substances 0.000 title claims abstract description 27
- 229910052748 manganese Inorganic materials 0.000 title claims abstract description 23
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 23
- 239000011574 phosphorus Substances 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 17
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 15
- 239000011593 sulfur Substances 0.000 claims abstract description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000001301 oxygen Substances 0.000 claims abstract description 12
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 11
- 238000005096 rolling process Methods 0.000 claims abstract description 11
- 238000007670 refining Methods 0.000 claims abstract description 10
- 229910052742 iron Inorganic materials 0.000 claims abstract description 8
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 8
- 238000009749 continuous casting Methods 0.000 claims abstract description 7
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 6
- 238000004321 preservation Methods 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims abstract description 5
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 229910052802 copper Inorganic materials 0.000 claims abstract description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 3
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 238000003723 Smelting Methods 0.000 claims description 7
- 229910052786 argon Inorganic materials 0.000 claims description 7
- 238000007664 blowing Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 239000002893 slag Substances 0.000 claims description 7
- 238000010079 rubber tapping Methods 0.000 claims description 6
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 4
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 239000004571 lime Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 3
- WNQQFQRHFNVNSP-UHFFFAOYSA-N [Ca].[Fe] Chemical compound [Ca].[Fe] WNQQFQRHFNVNSP-UHFFFAOYSA-N 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 229910000616 Ferromanganese Inorganic materials 0.000 claims description 2
- 229910001309 Ferromolybdenum Inorganic materials 0.000 claims description 2
- 229910000863 Ferronickel Inorganic materials 0.000 claims description 2
- 238000005275 alloying Methods 0.000 claims description 2
- 229910000514 dolomite Inorganic materials 0.000 claims description 2
- 239000010459 dolomite Substances 0.000 claims description 2
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 claims description 2
- 238000009987 spinning Methods 0.000 claims description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000010703 silicon Substances 0.000 abstract description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 4
- 238000005097 cold rolling Methods 0.000 abstract description 2
- 238000005266 casting Methods 0.000 description 9
- 238000005728 strengthening Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 229910000859 α-Fe Inorganic materials 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 208000032544 Cicatrix Diseases 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910000720 Silicomanganese Inorganic materials 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000010622 cold drawing Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 230000037387 scars Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000005482 strain hardening 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
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
- 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
- B21B1/16—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section
-
- 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
- B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
- B22D11/182—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level by measuring temperature
-
- 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
-
- 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
- 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
- C22C38/04—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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
-
- 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)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
本发明提供了一种低硫磷的高锰埋弧焊丝用钢及其制备方法,钢中化学成分按重量百分比计为:C 0.07%~0.11%、Si≤0.10%、Mn 1.30%~1.50%、P≤0.012%、S≤0.008%、Mo 0.50%~0.65%、Ni 0.15%~0.25%、Cu≤0.10%、Al≤0.008%、O≤0.0040%、N≤0.0050%,其余为铁和不可避免的杂质。本发明采用“120t转炉+LF炉精炼+小方坯连铸+加热炉加热+控轧控冷轧制+保温通道”的生产模式,解决低硫磷的高锰埋弧焊丝用钢低硅品种过程控氧难题。本发明既保证了低硫磷的高锰埋弧焊丝用钢盘条的力学性能要求,同时具有良好拉拔性能和焊接性能。
Description
技术领域
本发明涉及钢铁冶金技术领域,尤其涉及一种低硫磷的高锰埋弧焊丝用钢及其制备方法。
背景技术
某钢厂研发生产的低硫磷的高锰埋弧焊丝用钢主要用于有较高韧性要求结构的焊接。是桥梁、船舶、压力容器、工程机械和高寒地区钢结构的理想焊接材料。焊缝成形美观、脱渣优良。
对该低硫磷的高锰埋弧焊丝用钢的表面质量要求为:盘条头尾未穿水部分及有缺陷部分应切除。盘条表面不得有结疤、折叠、耳子、划伤及肉眼可见裂纹;允许有压痕及局部的凸块、划痕、麻面,但其深度或高度(从实际尺寸算起)应不大于0.10mm。
目前对生产该低硫磷的高锰埋弧焊丝用钢有以下技术难题需要解决:1)盘条强度性能较难控制;2)在冶炼过程中对控氧有一定难度。
发明内容
本发明的目的在于提供一种低硫磷的高锰埋弧焊丝用钢及其制备方法,本发明采用“120t转炉+LF炉精炼+150mm×150mm小方坯连铸+加热炉加热+控轧控冷轧制+保温通道”的生产模式,用以解决低硫磷的高锰埋弧焊丝用钢的低硅品种过程控氧难题。另外,本发明既保证了低硫磷的高锰埋弧焊丝用钢盘条的力学性能要求,同时具有良好拉拔性能和焊接性能。
为了达到上述目的,本发明采用以下技术方案实现:
一种低硫磷的高锰埋弧焊丝用钢,钢中化学成分按重量百分比计为:C 0.07%~0.11%、Si≤0.10%、Mn 1.30%~1.50%、P≤0.012%、S≤0.008%、Mo 0.50%~0.65%、Ni 0.15%~0.25%、Cu≤0.10%、Al≤0.008%、O≤0.0040%、N≤0.0050%,其余为铁和不可避免的杂质。
焊丝用钢盘条抗拉强度520~580MPa、断后伸长率21%~25%、断面收缩率70%~75%;非金属夹杂物A+C≤1.5;B+D≤1.5。
本发明成分设计理由如下:
C是最主要的强化元素,C含量对焊缝的强韧塑性及其组织均有较大的影响,不宜过高或过低。C含量过高,将会使焊缝的韧性和塑性迅速下降,甚至引起焊缝开裂,C含量过低,将影响焊缝强度。严格控制低的C含量0.07~0.11%。
Si具有很强的固溶强化作用,同时大大提高加工硬化率,Si含量过高导致冷拔时形变抗力加大,有降低塑韧性倾向,同时Si氧化形成夹杂将对焊缝造成严重危害。所以Si含量添加量控制≤0.10%。
Mn具有固溶强化、细晶强化作用,能提高钢的强度。焊缝强韧化的有效元素。Mn可以细化晶粒,提高焊缝的低温冲击韧性,并有脱氧脱硫作用,同时Mn的加入保证因降碳而引起的强度下降所失去的强度。考虑钢基础强度Mn含量控制为1.30~1.50%。
S在钢中是严重偏析元素,硫化物会恶化钢材性能,导致韧性下降,拉拔性能变坏;P:会影响钢的塑性和焊接性能,尽量降低P、S含量,减少夹杂物的有害作用,保证拉拔延伸性能,P含量≤0.012%、S含量≤0.008%。
Mo焊缝中含有一定量的Mo元素有利于提高焊缝中针状铁素体的含量,减少先共析铁素体,并有细化铁素体晶粒的作用,提高焊缝的强韧性。本发明Mo含量0.50~0.65%。
Ni有助于提高焊缝金属的韧性,降低韧脆转变温度。本发明Ni含量0.15~0.25%。
一种低硫磷的高锰埋弧焊丝用钢的制备方法,为了保证铸坯质量,通过钢水过热度、拉坯速度、连铸结晶器电磁搅拌和凝固末端电磁搅拌等有效措施控制来提高铸坯的表面质量,减少内部裂纹和中心缺陷。包括如下工艺过程“高炉铁水→铁水预处理→复吹转炉冶炼→LF炉精炼→150mm×150mm小方坯连铸(结晶器电磁搅拌及凝固末端电磁搅拌)→步进式加热炉加热→高速线材轧制→控制冷却→取样、检验、判定→包装、交库”。具体包括如下方法步骤:
1)转炉冶炼:废钢占10%~15%,铁水占85%~90%;镍铁280~320kg/炉随着废钢一起加入氧气顶底复吹转炉,出钢温度1600~1630℃,出钢终点C为0.045%~0.050%,转炉双渣冶炼,目标一次倒炉P≤0.008%;严禁下渣。吨钢辅料加入量:活性石灰52~62kg,白云石32.5~40.5kg,另外加入低碳锰铁14.8~16.8kg,低钙硅铁0.95~1.05kg。钼铁9.5~10.5kg进行合金化,出钢时:吹氩时间≥5min。
2)静吹氩:静吹氩时间≥8min,处理前温度1600~1625℃,处理后温度1584~1594℃,静吹氩后喂纯钙包芯线1~1.2kg/t·钢,喂线速度2.8~3.2m/s;
3)LF炉精炼:要求白渣操作,在保证渣流动性的条件下,控制渣碱度和渣中的氧势;对钢水时时检测,进行微调合金,保证钢水成分达到标准要求;LF精炼时间60~90min,全分析温度1570~1615℃;吨钢辅料加入量:活性石灰9.5~10.2kg,硅锰17~1.9kg,硅铁1.2~1.4kg;分批量加入铝粒19~21kg/炉,离站前加铝线19~21m/炉微调氧,从而有效控制钢中氧含量,也防止出现回硅现象;另外加钙铁线380~410m/炉,并对钢水时时检测,进行微调合金保证钢水成分达到标准要求,软吹时间≥12min。其中铝粒和铝线起到脱氧的作用,钙铁线起到改变夹杂物形态利于夹杂物上浮去除的作用。
4)连铸:结晶器电磁搅拌电流220~260A,频率4~6Hz,正反转;末端电磁搅拌电流230~270A,频率4~8Hz,连续转。平台温度1610~1620℃,中包温度1565~1580℃,过热度保持25~35℃,拉速2.2~2.4m/min;全过程保护浇铸,结晶器保护渣使用低碳钢方坯保护渣;铸坯切割采用自动加人工相结合的方式。
5)加热工艺:步进式加热炉加热,采取“一隔一空位”的加热模式,即相邻两个坯料之间留有一个空位,预热段860~900℃,加热段1080~1120℃,均热段1120~1160℃,加热时间≤2.5h。
6)轧制工艺:粗轧温度980~1020℃;精轧入口温度900~940℃;吐丝温度780~820℃;风冷辊道速度:头部辊道0.09~0.12m/s;辊道增速设定2%~5%;保温罩全部使用。
保温通道:保温通道有效利用,保证组织应力及内应力的有效释放,以此亦保证了产品的性能和通条性能差的要求
与现有技术相比,本发明的有益效果是:
1)困为本发明为低硅品种,整个过程控氧有一定难度,在FL炉精炼过程中,分批量加入铝粒19~21kg/炉,离站前加铝线19~21m/炉微调氧,从而有效控制钢中氧含量,也防止出现回硅现象。
2)采用连铸结晶器电磁搅拌和末端电磁搅拌,提高铸坯的表面质量,减少中心疏松等缺陷。
3)步进加热炉加热时采取“一隔一空位”的加热模式,缩短加热时间,保证坯料加热更为均匀,避免生成难除FeSiO4。
4)通过轧钢斯太尔摩控轧控冷工艺,结合缓慢冷却工艺,获得由铁素体和珠光体组成金相组织等。
5)本发明的盘条氧化铁皮厚度为10-14μm适合机械除鳞。
附图说明
图1是实施例1的产品金相组织图。
图2是实施例1的产品氧化铁皮厚度。
具体实施方式
下面结合实施例对本发明的具体实施方式作进一步说明。
本发明实施例化学成分见表1;本发明实施例制造工艺参数见表2;本发明实施例冶炼辅料添加量见表3;本发明实施例铸坯低倍缺陷见表4:本发明实施例产品力学性能见表5;本发明实施例显微组织和非金属夹杂见表6。
表1实施例化学成分
实施例 | C | Si | Mn | P | S | Mo | Ni | Cu | Al | O | N |
1 | 0.084 | 0.086 | 1.38 | 0.008 | 0.007 | 0.55 | 0.17 | 0.0148 | 0.0048 | 0.0032 | 0.0045 |
2 | 0.080 | 0.092 | 1.37 | 0.008 | 0.008 | 0.56 | 0.17 | 0.012 | 0.0060 | 0.0036 | 0.0043 |
3 | 0.10 | 0.090 | 1.40 | 0.007 | 0.007. | 0.51 | 0.06 | 0.011 | 0.0050 | 0.0033 | 0.0045 |
4 | 0.99 | 0.078 | 1.45 | 0.008 | 0.008 | 0.52 | 0.23 | 0.012 | 0.0061 | 0.0032 | 0.0042 |
5 | 0.95 | 0.085 | 1.48 | 0.006 | 0.006 | 0.56 | 0.21 | 0.013 | 0.0052 | 0.0034 | 0.0041 |
6 | 0.93 | 0.079 | 1.46 | 0.008 | 0.007 | 0.61 | 0.24 | 0.014 | 0.0049 | 0.0033 | 0.0044 |
7 | 0.89 | 0.083 | 1.44 | 0.007 | 0.008 | 0.59 | 0.25 | 0.012 | 0.0045 | 0.0036 | 0.0041 |
8 | 0.78 | 0.082 | 1.42 | 0.006 | 0.006 | 0.62 | 0.22 | 0.013 | 0.0052 | 0.0035 | 0.0039 |
9 | 0.85 | 0.080 | 1.43 | 0.007 | 0.005 | 0.58 | 0.20 | 0.014 | 0.0056 | 0.0029 | 0.0040 |
10 | 0.81 | 0.071 | 1.41 | 0.008 | 0.007 | 0.64 | 0.19 | 0.012 | 0.0060 | 0.0030 | 0.0038 |
表2实施例制造工艺参数(一)
表2实施例制造工艺参数(二)
表3实施例冶炼辅料添加量
表4实施例铸坯低倍缺陷检验结果:
表5实施例产品力学性能
实施例 | 抗拉强度/MPa | 断后伸长率/% | 断面收缩率/% |
1 | 560 | 21.5 | 73 |
2 | 557 | 23 | 73 |
3 | 555 | 24.5 | 70 |
4 | 545 | 23 | 71 |
5 | 570 | 22 | 74 |
6 | 578 | 23 | 75 |
7 | 575 | 24 | 72 |
8 | 576 | 22.5 | 73 |
9 | 565 | 23.5 | 75 |
10 | 545 | 24 | 74 |
表6实施例产品显微组织和非金属夹杂物
Claims (7)
1.一种低硫磷的高锰埋弧焊丝用钢,其特征在于,钢中化学成分按重量百分比计为:C0.07%~0.11%、Si≤0.10%、Mn 1.30%~1.50%、P≤0.012%、S≤0.008%、Mo 0.50%~0.65%、Ni 0.15%~0.25%、Cu≤0.10%、Al≤0.008%、O≤0.0040%、N≤0.0050%,其余为铁和不可避免的杂质。
2.根据权利要求1所述的一种低硫磷的高锰埋弧焊丝用钢,其特征在于,焊丝用钢盘条抗拉强度520~580MPa、断后伸长率21%~25%、断面收缩率70%~75%;非金属夹杂物A+C≤1.5;B+D≤1.5。
3.一种如权利要求1或2所述的低硫磷的高锰埋弧焊丝用钢的制备方法,其特征在于,包括如下方法步骤:
1)转炉冶炼:镍铁随着废钢一起加入氧气顶底复吹转炉,出钢温度1600~1630℃,出钢终点C为0.045%~0.050%,转炉双渣冶炼,目标一次倒炉P≤0.008%;
2)静吹氩:静吹氩时间≥6min,处理前温度1600~1625℃,处理后温度1584~1594℃;
3)LF炉精炼:LF精炼时间60~90min,全分析温度1570~1615℃,分批量加入铝粒19~21kg/炉,离站前加铝线19~21m/炉微调氧;加钙铁线380~410m/炉;
4)连铸:平台温度1610~1620℃,中包温度1565~1580℃,过热度保持25~35℃,拉速2.2~2.4m/min;
5)加热工艺:步进式加热炉加热,采取“一隔一空位”的加热模式,预热段860~900℃,加热段1080~1120℃,均热段1120~1160℃,加热时间≤2.5h;
6)轧制工艺:粗轧温度980~1020℃;精轧入口温度900~940℃;吐丝温度780~820℃;风冷辊道速度:头部辊道0.09~0.12m/s;辊道增速设定2%~5%;保温罩全部使用。
4.根据权利要求3所述的一种低硫磷的高锰埋弧焊丝用钢的制备方法,其特征在于,上述步骤1)中的转炉冶炼废钢占10%~15%,铁水占85%~90%。
5.根据权利要求3所述的一种低硫磷的高锰埋弧焊丝用钢的制备方法,其特征在于,上述步骤1)的的转炉冶炼中吨钢辅料加入量:活性石灰52~62kg,白云石32.5~40.5kg;另外加入低碳锰铁,低钙硅铁,钼铁进行合金化,出钢时吹氩时间≥5min。
6.根据权利要求3所述的一种低硫磷的高锰埋弧焊丝用钢的制备方法,其特征在于,上述步骤3)的LF炉精炼中吨钢辅料加入量:活性石灰9.5~10.2kg/t·钢,软吹时间≥12min。
7.根据权利要求3所述的一种低硫磷的高锰埋弧焊丝用钢的制备方法,其特征在于,上述步骤4)中结晶器电磁搅拌电流220~260A,频率4~6Hz,正反转;末端电磁搅拌电流230~270A,频率4~8Hz,连续转。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202310607436.6A CN116640993A (zh) | 2023-05-26 | 2023-05-26 | 一种低硫磷的高锰埋弧焊丝用钢及其制备方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202310607436.6A CN116640993A (zh) | 2023-05-26 | 2023-05-26 | 一种低硫磷的高锰埋弧焊丝用钢及其制备方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN116640993A true CN116640993A (zh) | 2023-08-25 |
Family
ID=87614849
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202310607436.6A Pending CN116640993A (zh) | 2023-05-26 | 2023-05-26 | 一种低硫磷的高锰埋弧焊丝用钢及其制备方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN116640993A (zh) |
-
2023
- 2023-05-26 CN CN202310607436.6A patent/CN116640993A/zh active Pending
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN109252097B (zh) | 一种高强度胀断连杆的非调质钢及其连铸生产工艺 | |
CN109988972B (zh) | 一种低碳含硫空调管用圆钢及其生产工艺 | |
CN110343954B (zh) | 一种汽车发动机连杆用钢及其制造方法 | |
CN109252008A (zh) | 一种低碳低氮超低硫钢的生产方法 | |
CN112899560B (zh) | 一种高强度齿轮用钢23CrMnMoS及其制造方法 | |
CN111349853B (zh) | 微合金处理热轧h型钢的轧制方法 | |
CN107354269A (zh) | Rh复合脱氧生产超低碳钢的方法 | |
CN114318154A (zh) | 一种高洁净度焊丝钢l-s3及其制备方法 | |
CN114672723A (zh) | 一种胀断连杆用46MnVS系列钢及其制造方法 | |
CN111334718A (zh) | 一种欧洲标准R260Mn钢轨及其生产方法 | |
CN111155022A (zh) | 一种具有低温韧性的390MPa级极地船体结构钢及其制备方法 | |
CN111455131B (zh) | 高洁净度耐磨钢的冶炼及连铸方法 | |
CN116657043A (zh) | 一种低碱度胎圈钢丝用钢及其生产工艺 | |
CN116397159A (zh) | 一种气保焊丝用钢H08MnSiCuCrNiⅡ及生产制备方法 | |
CN109930064B (zh) | 一种耐腐蚀高压锅炉管用耐热钢及其生产方法 | |
CN115094307B (zh) | 一种电渣重熔用热作模具钢连铸圆坯及其生产工艺 | |
CN113151744B (zh) | 一种工程机械回转支承用钢s48c及其生产方法 | |
CN112226668B (zh) | 一种含铝的适合于大线能焊接的低合金钢板的制造方法 | |
CN116640993A (zh) | 一种低硫磷的高锰埋弧焊丝用钢及其制备方法 | |
CN110408854B (zh) | 一种贝氏体不锈钢及其制备方法 | |
CN114480987A (zh) | 一种含稀土的nm600耐磨钢板及其制备方法 | |
CN112458368A (zh) | 一种稀土-钛微合金化高强度中厚板及其制造方法 | |
CN111455258A (zh) | 一种玻璃幕墙预埋紧固件用钢及其生产方法 | |
CN116657042A (zh) | 一种高合金焊丝用盘条钢及其制备方法 | |
CN116640992A (zh) | 一种气保焊丝用钢H08Mn2CrMo及其制备方法 |
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 |