CN114774798A - 一种低碳含钛焊条钢的生产方法 - Google Patents

一种低碳含钛焊条钢的生产方法 Download PDF

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CN114774798A
CN114774798A CN202210552767.XA CN202210552767A CN114774798A CN 114774798 A CN114774798 A CN 114774798A CN 202210552767 A CN202210552767 A CN 202210552767A CN 114774798 A CN114774798 A CN 114774798A
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陈军
周文浩
张成元
巨银军
郑健
黄振华
林丹
朱建成
李建宇
杨建华
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Hunan Valin Xiangtan Iron and Steel Co Ltd
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    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/02Ferrous alloys, e.g. steel alloys containing silicon
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    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C1/00Refining of pig-iron; Cast iron
    • C21C1/02Dephosphorising or desulfurising
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    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C1/00Refining of pig-iron; Cast iron
    • C21C1/04Removing impurities other than carbon, phosphorus or sulfur
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0006Adding metallic additives
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    • C21C7/00Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04Removing impurities by adding a treating agent
    • C21C7/06Deoxidising, e.g. killing
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04Removing impurities by adding a treating agent
    • C21C7/064Dephosphorising; Desulfurising
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    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C33/00Making ferrous alloys
    • C22C33/04Making ferrous alloys by melting
    • C22C33/06Making ferrous alloys by melting using master alloys
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    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/04Ferrous alloys, e.g. steel alloys containing manganese
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/14Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • YGENERAL 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
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Abstract

本发明涉及一种低碳含钛焊条钢的生产方法,钢的化学组成重量百分比为C≤0.08%,Si≤0.03%,Mn=0.40%~0.65%,Ti≥0.05%,P≤0.020%,S≤0.020%,余量为Fe和不可避免的杂质;采用铁水预处理+LD+CAS+CC冶炼技术,采用铁水预处理+LD+CAS+CC生产技术,采用铁水预处理脱S,出站S≤0.003%,转炉终点C≤0.08%,P≤0.020%,S≤0.020%,T≥1650℃,出钢过程加合金和脱氧剂、出钢过程炉后加渣料进行渣洗、CAS微调成份、CAS小氩气搅拌软吹等一系列技术,解决了不进钢包炉造白渣冶炼的钢水可浇性问题,降低了生产成本,成功开发了成品C≤0.08%,Si≤0.03%,Mn:0.40‑0.65%,Ti≥0.05%,P≤0.020%,S≤0.020%的低碳含钛焊条钢。

Description

一种低碳含钛焊条钢的生产方法
技术领域
本发明属于冶金技术领域,涉及一种低碳含钛焊条钢的生产方法。
背景技术
现有技术对焊条钢生产曾一直采用铁水预处理+LD+CAS+CC工艺。为了保证钢水的可浇性,钢水中氧含量控制在30~50ppm。
之后有人开发了含钛焊条钢,通过加铝去除钢水中的氧后,再加入TiFe来确保化学成分满足设计要求,但钢水可浇性不能满足生产的要求,为此增加了钢包炉造白渣去夹杂工艺。
为了降低生产成本,冶金技术工作者摸索不进钢包炉低碳含钛焊条钢的生产工艺取得了一定进步,但是离设想的要求还是具有较大差距。
发明内容
本发明旨在提供一种低碳含钛焊条钢的生产方法,要求生产的低碳含钛焊条钢成品的钢满足焊接性能的使用要求:C≤0.08%,Si≤0.03%,Mn=0.40%~0.65%,Ti≥0.05%,P≤0.020%, S≤0.020%。
本发明的技术方案:
一种低碳含钛焊条钢的生产方法,钢的化学组成重量百分比为C≤0.08%,Si≤0.03%,Mn=0.40%~0.65%,Ti≥0.05%,P≤0.020%, S≤0.020%,余量为Fe和不可避免的杂质;关键工艺步骤包括:
(1)铁水预处理:铁水预处理脱S,控制出站S≤0.003%;
(2)转炉冶炼:转炉终点C≤0.07%, P≤0.020%, S≤0.020%,T≥1650℃,出钢过程加中碳锰铁400kg、高铝锰铁100kg、硅铝钡20kg、铝块60kg、出钢过程炉后加200kg石灰和150kg合成渣渣料,出完钢加入TiFe100kg;
(3)CAS冶炼:CAS微调成份、CAS小氩气搅拌软吹,加入60kg电石,在站时间≥10分钟。
发明原理:
为了确保成份的命中,采用铁水预处理脱S,转炉采用转炉终点C≤0.07%, P≤0.020%, S≤0.020%,T≥1650℃,炉后出钢加合金、铝块、脱氧剂先脱去钢水中的氧含量,最后加入TiFe,确保钢水中的Ti含量满足要求。
为了改善钢水的可浇性,通过转炉出钢过程加入脱氧剂将钢水中的降低,同时炉后加入石灰和合成渣进行渣洗去除钢水中的夹杂物,同时通过CAS微调成份、CAS小氩气搅、顶渣加入电石脱氧,在站时间≥10分钟,促使钢水中夹杂物进入钢包顶渣中,改善钢水的可浇性。
本发明的突出特点和显著效果主要体现在:
1)采用铁水预处理+LD+CAS+CC冶炼技术,采用铁水预处理+LD+CAS+CC生产技术,采用铁水预处理脱S,出站S≤0.003%,转炉终点C≤0.07%, P≤0.020%, S≤0.020%,T≥1650℃,出钢过程加合金和脱氧剂、出钢过程炉后加渣料进行渣洗、CAS微调成份、CAS小氩气搅拌软吹等一系列技术,解决了不进钢包炉造白渣冶炼的钢水可浇性问题,降低了生产成本,成功开发了成品C≤0.08%,Si≤0.03%,Mn:0.40-0.65%,Ti≥0.05%,P≤0.020%, S≤0.020%的低碳含钛焊条钢;
2)充分发挥现有的设备优势,在不进LF炉造白渣脱氧的情况下,通过转炉出钢过程加入渣料渣洗,CAS对顶渣脱氧吸附夹杂物,成功的解决了钢水的可浇性,降低了生产成本,生产除成品C≤0.08%,Si≤0.03%,Mn:0.40-0.65%,Ti≥0.05%,P≤0.020%, S≤0.020%的低碳含钛焊条钢。
具体实施方式
下面结合实施例对本发明内容作进一步说明。
实施例1:
一种低碳含钛焊条钢的生产方法,钢的化学组成重量百分比为C=0.068%,Si=0.03%,Mn=0.42%,Ti=0.057%,P=0.017%,S=0.016%,余量为Fe和不可避免的杂质。工艺步骤包括:
(1)铁水预处理:铁水预处理脱S,预处理铁水S=0.0023%;
(2)转炉冶炼:转炉冶炼终点C=0.055%, P=0.016%,S=0.015%,T=1659℃,滑板挡渣,出钢过程加中碳锰铁402kg、高铝锰铁100kg、硅铝钡20kg、铝块60kg,出钢过程炉后加207kg石灰和154kg合成渣渣料,出完钢加入TiFe100kg;
(3)CAS冶炼:CAS进站取样C=0.056%,Si=0.009%,Mn=0.43%,Ti=0.063%,P=0.016%,S=0.015%,CAS加入20kg高碳锰铁,喂入90米硅钙钡包芯线、CAS小氩气搅拌软吹,加入60kg电石,在站时间15分钟。
实施例2:
一种低碳含钛焊条钢的生产方法,钢的化学组成重量百分比为C=0.060%,Si=0.02%,Mn=0.44%,Ti=0.059%,P= 0.010%,S=0.012%,余量为Fe和不可避免的杂质。工艺步骤包括:
(1)铁水预处理:铁水预处理脱S,预处理铁水S=0.0021%;
(2)转炉冶炼:转炉冶炼终点C=0.043%, P=0.009%,S=0.011%,T=1662℃,滑板挡渣,出钢过程加中碳锰铁403kg、高铝锰铁100kg、硅铝钡20kg、铝块60kg,出钢过程炉后加210kg石灰和157kg合成渣渣料,出完钢加入TiFe104kg;
(3)CAS冶炼:CAS进站取样C=0.046%,Si=0.012%,Mn=0.404%,Ti=0.065%,P=0.010%,S=0.011%,CAS加入10kg高碳锰铁, 喂入60米硅钙钡包芯线、CAS小氩气搅拌软吹,加入60kg电石,在站时间12分钟。
实施例3:
一种低碳含钛焊条钢的生产方法,钢的化学组成重量百分比为C=0.065%,Si=0.02%,Mn=0.45%,Ti=0.061%,P=0.012%,S=0.013%,余量为Fe和不可避免的杂质。工艺步骤包括:
(1)铁水预处理:铁水预处理脱S,预处理铁水S=0.0027%;
(2)转炉冶炼:转炉冶炼终点C=0.043%,P=0.013%,S=0.014%,T=1664℃,滑板挡渣,出钢过程加中碳锰铁406kg、高铝锰铁100kg、硅铝钡20kg、铝块60kg,出钢过程炉后加202kg石灰和152kg合成渣渣料,出完钢加入TiFe108kg;
(3)CAS冶炼:CAS进站取样C=0.058%,Si=0.01%,Mn=0.419%,Ti=0.068%,P=0.012%,S=0.014%,CAS加入20kg高碳锰铁,喂入50米硅钙钡包芯线,CAS小氩气搅拌软吹,加入60kg电石,在站时间14分钟。

Claims (1)

1.一种低碳含钛焊条钢的生产方法,钢的化学组成重量百分比为C≤0.08%,Si≤0.03%,Mn=0.40%~0.65%,Ti≥0.05%,P≤0.020%, S≤0.020%,余量为Fe和不可避免的杂质;关键工艺步骤包括:
(1)铁水预处理:铁水预处理脱S,控制出站S≤0.003%;
(2)转炉冶炼:转炉终点C≤0.07%, P≤0.020%, S≤0.020%,T≥1650℃,出钢过程加中碳锰铁400kg、高铝锰铁100kg、硅铝钡20kg、铝块60kg、出钢过程炉后加200kg石灰和150kg合成渣渣料,出完钢加入TiFe100kg;
(3)CAS冶炼:CAS微调成份、CAS小氩气搅拌软吹,加入60kg电石,在站时间≥10分钟。
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104862443A (zh) * 2015-03-31 2015-08-26 青岛钢铁控股集团有限责任公司 一种低碳低硅焊丝钢的冶炼方法
CN107385341A (zh) * 2017-08-02 2017-11-24 首钢水城钢铁(集团)有限责任公司 一种焊条钢及其制造工艺
CN109706404A (zh) * 2019-02-27 2019-05-03 山东钢铁股份有限公司 一种含钛碳素钢及其生产方法
CN112280923A (zh) * 2020-09-28 2021-01-29 甘肃酒钢集团宏兴钢铁股份有限公司 焊条钢H08Mn的冶炼方法
CN112501488A (zh) * 2020-10-22 2021-03-16 福建三宝钢铁有限公司 一种h08a钢的制备工艺

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104862443A (zh) * 2015-03-31 2015-08-26 青岛钢铁控股集团有限责任公司 一种低碳低硅焊丝钢的冶炼方法
CN107385341A (zh) * 2017-08-02 2017-11-24 首钢水城钢铁(集团)有限责任公司 一种焊条钢及其制造工艺
CN109706404A (zh) * 2019-02-27 2019-05-03 山东钢铁股份有限公司 一种含钛碳素钢及其生产方法
CN112280923A (zh) * 2020-09-28 2021-01-29 甘肃酒钢集团宏兴钢铁股份有限公司 焊条钢H08Mn的冶炼方法
CN112501488A (zh) * 2020-10-22 2021-03-16 福建三宝钢铁有限公司 一种h08a钢的制备工艺

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