CN114959162A - 一种抗HIC压力容器钢SA516Gr60N的冶炼方法 - Google Patents
一种抗HIC压力容器钢SA516Gr60N的冶炼方法 Download PDFInfo
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Abstract
本发明公开了一种抗HIC压力容器钢SA516Gr60N的冶炼方法,工艺路线为转炉冶炼、出钢造渣、LF精炼、钙化处理、VD真空精炼、连铸、铸坯堆冷,其特征在于,包括如下具体步骤:步骤一、转炉冶炼工艺;步骤二、精炼炉冶炼工艺;步骤三、连铸工艺。本发明通过转炉造渣制度优化,LF炉精炼造氧化渣脱磷,造还原渣脱氧、脱硫工艺,VD真空脱气和去夹杂物工艺、连铸低过热度全程保护浇注,使铸坯成分均匀,磷≤0.008%,硫≤0.0015%,氧(O)≤15ppm,氢(H)≤1.5ppm,非金属夹杂物有效控制,铸坯内部质量良好,保证高附加值的抗氢致开裂用钢的生产。
Description
技术领域
本发明属于冶金技术领域,涉及一种抗HIC压力容器钢SA516Gr60N的冶炼控制方法。
背景技术
抗氢致开裂的机理,前人已经有了较多的研究,主要集中在两点:控制钢材中的杂质和材料的均匀性。对于抗氢致裂纹容器钢而言,Nb、V、B 等合金都是禁止有意添加的,只能通过提高C、Mn含量来保证产品强度,而C、Mn都是易偏析元素,在连铸过程中,偏析是影响铸坯质量的重要因素,偏析引起的疏松和细长夹杂物更容易成为裂纹源。在酸性环境中,钢中夹杂物越多,钢的HIC敏感性就越高。
通过改善冶金工艺,来提高铸坯的质量,减小偏析和夹杂物含量,可以有效提高钢的抗HIC性。
发明内容
本发明旨在提供一种抗HIC压力容器钢SA516Gr60N的冶炼控制方法,通过转炉造渣制度优化,LF炉精炼造氧化渣脱磷,造还原渣脱氧、脱硫工艺,VD真空脱气和去夹杂物工艺、连铸低过热度全程保护浇注,使铸坯成分均匀,磷≤0.008%,硫≤0.0015%,氧≤15ppm,氢≤1.5ppm,非金属夹杂物有效控制,铸坯内部质量良好。
本发明通过下述技术方案予以实现:
一种抗HIC压力容器钢SA516Gr60N的冶炼控制方法,工艺路线为转炉冶炼、出钢造渣、LF精炼、钙化处理、VD真空精炼、连铸、铸坯堆冷,包括如下关键步骤:
(1)转炉冶炼:转炉采用高碱度、高氧化性、低温度渣系操作,脱磷、脱碳,终点控制氧≥450ppm,碳氧积=0.0030%,出钢温度1570~1600℃,终点磷含量控制≤0.012%;挡渣出钢,炉后无铝脱氧,出钢过程中加入1.8~2.2kg/t钢石灰;
(2)精炼炉冶炼:LF炉升温至1550~1570℃加入2.6~3.0kg/t钢石灰,造氧化渣脱磷,加入2.2~2.6kg/t钢石灰稠渣后扒渣,扒渣后磷含量控制≤0.004%;脱磷扒渣后取样,再造还原渣脱氧、脱硫、合金化,钢水成分、温度达到钢种目标要求出站;VD抽真空,在真空度0.5tor以下保持时间15min;破空后分两次喂入钙线300m对钢水进行钙化处理,软吹搅拌时间≥15min,直至达到目标温度1538~1543℃上台;
(3)连铸:低过热度全程保护浇铸,控制过热度6~13,二次冷却采用动态配水冷却,采用动态轻压下技术减轻铸坯中心偏析与疏松。
本发明通过转炉造渣制度优化,LF炉精炼造氧化渣脱磷,造还原渣脱氧、脱硫工艺,VD真空脱气和去夹杂物工艺、连铸低过热度全程保护浇注,得到的钢铸坯成分均匀,磷≤0.008%,硫≤0.0015%,氧≤15ppm,氢≤1.5ppm,非金属夹杂物有效控制,铸坯内部质量良好。
本发明的原理:
关于转炉冶炼,利用大氧气射流搅拌熔池,造高碱度、高氧化性、低温度渣系操作,脱磷、脱碳,终点控制氧≥450ppm,碳氧积=0.0030%,出钢温度1570~1600℃,终点磷含量控制≤0.012%,采用挡渣出钢,减少高氧化渣的混出,不脱氧合金化,保持钢水的高氧含量,炉后加入1.5~2.5kg/t钢石灰,为后续精炼创造条件。
关于精炼炉冶炼,LF炉升温至1550~1570℃加入2.6~3.0kg/t钢石灰,造氧化渣进一步脱磷,扒渣后P≤0.004%,再采用石灰和精炼渣料脱氧、脱硫,造高碱度流动性渣,精炼渣碱度CaO/SiO2=7.0~8.0,出站前钙化处理控制钢水中夹杂物,VD炉真空处理,对钢水进行脱氮、氢、氧处理,氢含量≤1.5ppm,氧含量≤15ppm。
关于连铸,连铸采用低过热度保护浇铸,全程保护浇铸可有效降低二次氧化物的生产,控制过热度6~13℃,连铸二冷动态配水技术,凝固末端三段动态轻压下技术,压下量7~9mm,减少中心桥琏的形成,减轻中心偏析与疏松,中心偏析≤1.0级;铸坯经火焰切割后铸坯淬火装置激冷至≤600℃,缓冷均匀铸坯组织,铸坯态组织进一步稳定。
本发明的优点:生产流程简单,合金成本低;通过转炉一次性造渣脱磷、LF炉造氧化渣进一步脱P技术,改善了传统冶炼工序,省去传统铁水预处理工艺,减轻了转炉的吹炼压力,延长的转炉炉龄,同时稳定控制成品P≤0.008%;稳定精炼工序生产,特别是P、S的稳定控制,从而使钢水成分、温度的控制稳定,给连铸提供了稳定的高质量钢水,有利于铸坯的内外部质量控制;提供连铸坯淬火激冷+堆缓冷技术,使铸坯组织更加细小均匀。该发明所冶炼的抗HIC压力容器钢SA516Gr60N坯料,成分偏析小,组织均匀,中心疏松、一般疏松均≤1.0级,A、B、C类粗系/细系夹杂物基本为0级,D类粗系/细系夹杂物均≤1.0级,铸坯内外部质量优良。
附图说明
图1为本发明的工艺流程图。
具体实施方式
下面结合260mm断面SA516Gr60N容器钢的生产一组实施例对本发明作进一步说明。
如图1所示,一种抗HIC压力容器钢SA516Gr60N的冶炼控制方法,工艺路线为转炉冶炼、出钢造渣、LF精炼、钙化处理、VD真空精炼、连铸、铸坯堆冷,重点工艺步骤见各实施例,工艺参数见各表。
实施例1:
(1)转炉冶炼:利用大氧气射流搅拌熔池,造高碱度(4.5)、高氧化性(TFe为20%)、低温度渣系操作,脱磷、脱碳,终点控制氧490ppm,出钢温度1583℃,采用挡渣出钢,出钢下渣量≤1kg/t,不脱氧合金化,炉后加入300kg石灰,炉后成分控制见表1;
(2)精炼炉冶炼:LF炉升温至1565℃加入400kg石灰,造氧化渣进一步脱磷,扒渣后成分控制见表2,再采用石灰和精炼渣料脱氧、脱硫,造高碱度流动性渣,精炼渣碱度CaO/SiO2=7.0~8.0,出站前钙化处理控制钢水中夹杂物,VD炉真空处理,对钢水进行脱氮、氢、氧处理,真空处理工艺参数见表3,钢水上台温度1539℃;
(3)连铸:连铸采用低过热度全程保护浇铸,控制过热度6~10℃,连铸二冷动态配水技术,凝固末端三段动态轻压下技术,压下量7~9mm,铸坯经火焰切割后铸坯淬火装置激冷至≤600℃,入专用垛位堆冷。
中包熔炼成分见表4,连铸有害元素见表5。
实施例2:
(1)转炉冶炼:利用大氧气射流搅拌熔池,造高碱度(4.8)、高氧化性(TFe为22%)、低温度渣系操作,脱磷、脱碳,终点控制氧484ppm,出钢温度1580℃,采用挡渣出钢,出钢下渣量≤1kg/t,不脱氧合金化,炉后加入300kg石灰;
(2)精炼炉冶炼:LF炉升温至1561℃加入400kg石灰,造氧化渣进一步脱磷,扒渣后成分控制见表2,再采用石灰和精炼渣料脱氧、脱硫,造高碱度流动性渣,精炼渣碱度CaO/SiO2=7.0~8.0,出站前钙化处理控制钢水中夹杂物,VD炉真空处理,对钢水进行脱氮、氢、氧处理,真空处理工艺参数见表3,钢水上台温度1542℃;
(3)连铸:连铸采用低过热度全程保护浇铸,控制过热度10~13℃,连铸二冷动态配水技术,凝固末端三段动态轻压下技术,压下量7~9mm,铸坯经火焰切割后铸坯淬火装置激冷至≤600℃,入专用垛位堆冷。
中包熔炼成分见表4,连铸有害元素见表5。
实施例3:
(1)转炉冶炼:利用大氧气射流搅拌熔池,造高碱度(4.6)、高氧化性(TFe为23%)、低温度渣系操作,脱磷、脱碳,终点控制氧516ppm,出钢温度1587℃,采用挡渣出钢,出钢下渣量≤1kg/t,不脱氧合金化,炉后加入300kg石灰,转炉终点成分见表1;
(2)精炼炉冶炼:LF炉升温至1565℃加入400kg石灰,造氧化渣进一步脱磷,扒渣后成分见表2,再采用石灰和精炼渣料脱氧、脱硫,造高碱度流动性渣,精炼渣碱度CaO/SiO2=7.0~8.0,出站前钙化处理控制钢水中夹杂物,VD炉真空处理,对钢水进行脱氮、氢、氧处理,真空处理工艺参数见表3,钢水上台温度1540℃;
(3)连铸:连铸采用低过热度全程保护浇铸,控制过热度7~11℃,连铸二冷动态配水技术,凝固末端三段动态轻压下技术,压下量7~9mm,铸坯经火焰切割后铸坯淬火装置激冷至≤600℃,入专用垛位堆冷。
中包熔炼成分见表4,连铸有害元素见表5。
表1 转炉终点成分(%)
表2 脱磷扒渣后成分(%)
表3 VD工艺参数
表4 连铸中包成分(%)
表5 连铸有害元素含量(ppm)
综上所述:通过转炉脱磷,终点控制氧≥450ppm,炉后无脱氧;LF炉造氧化渣进一步脱磷,扒渣后再造还原渣脱氧、脱硫、合金化;配合VD真空精炼脱除钢水中气体,破空后钢水钙化处理对夹杂物变性处理,软吹搅拌去除;连铸低过热度全程无氧化保护浇铸,实现熔炼终点钢水有害元素:[P]≤60ppm、[S]≤15ppm、[O]≤15ppm、[N]≤40ppm、[H]≤1.5ppm、结合连铸二次冷却动态配水冷却,采用动态轻压下技术减轻铸坯中心偏析与疏松,连铸坯内外部质量较好,可满足现场工业化大生产需求。
Claims (1)
1.一种抗HIC压力容器钢SA516Gr60N的冶炼控制方法,工艺路线为转炉冶炼、出钢造渣、LF精炼、钙化处理、VD真空精炼、连铸、铸坯堆冷,其特征在于包括如下关键工艺步骤:
(1)转炉冶炼:转炉采用高碱度、高氧化性、低温度渣系操作,脱磷、脱碳,终点控制氧≥450ppm,碳氧积=0.0030%,出钢温度1570~1600℃,终点磷含量控制≤0.012%;挡渣出钢,炉后无铝脱氧,出钢过程中加入1.8~2.2kg/t钢石灰;
(2)精炼炉冶炼:LF炉升温至1550~1570℃加入2.6~3.0kg/t钢石灰,造氧化渣脱磷,加入2.2~2.6kg/t钢石灰稠渣后扒渣,扒渣后磷含量控制≤0.004%;脱磷扒渣后取样,再造还原渣脱氧、脱硫、合金化,钢水成分、温度达到钢种目标要求出站;VD抽真空,在真空度0.5tor以下保持时间15min;破空后分两次喂入钙线300m对钢水进行钙化处理,软吹搅拌时间≥15min,直至达到目标温度1538~1543℃上台;
(3)连铸:低过热度全程保护浇铸,控制过热度6~13℃,二次冷却采用动态配水冷却,采用动态轻压下技术减轻铸坯中心偏析与疏松。
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Title |
---|
张新理等: "抗酸压力容器钢SA516Gr60连铸坯质量研究", 中北大学学报(自然科学版) * |
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