CN108624811A - 一种大厚壁抗酸耐蚀管线钢及其生产方法 - Google Patents
一种大厚壁抗酸耐蚀管线钢及其生产方法 Download PDFInfo
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Abstract
本发明公开了一种大厚壁抗酸耐蚀管线钢及其生产方法,涉及冶金技术领域,其成份按重量百分比为:C:0.01%~0.02%,Si:0.10%~0.35%,Mn:0.9%~1.40%,P≤0.012%,S≤0.0010%,Nb:0.020%~0.070%,Ti:0.006%~0.020%,Ni≤0.30%,Mo:0.10%~0.30%,Cr:0.10%~0.30%,Cu:0.10%~0.30%,Al:0.015%~0.050%,Ca:0.0005%~0.0040%,余量为Fe和杂质。采用低温奥氏体化温度1110℃~1120℃,入水温度790℃~800℃,采用超快冷冷却280℃~300℃,获得心部小于30μm的超细晶粒组织,获得了大壁厚钢板抗酸耐蚀性能。
Description
技术领域
本发明涉及冶金技术领域,特别是涉及一种大厚壁抗酸耐蚀管线钢及其生产方法。
背景技术
抗酸耐蚀管线钢主要是抗HIC、SSC性能,硫化氢是一种弱酸性电解质,在pH为1~5的水溶液中主要以分子态形式存在,硫化氢与金属发生腐蚀反应:H2S+Fe→FeS+2H生成原子氢,H2S作为氢复合成氢分子的毒化剂,使得原子氢易于进入钢的基体。进入钢中的氢原子通过扩散达到缺陷处,并析出成氢分子,产生很高的压力。有应力存在时,在拉伸应力(外加的或/和残余的)作用下,氢在冶金缺陷(夹杂、晶界、相界、位错、裂纹等)提供的三向拉应力区富集,当偏聚的氢浓度达到临界值时,高强度钢、高内应力构件等便会在氢和应力场的联合作用下开裂。因此,在产品设计上如何阻止原子氢进入钢的基体,使钢的基体满足抗酸耐蚀性能要求成为一大难题。
发明内容
本发明针对上述技术问题,克服现有技术的缺点,提供一种大厚壁抗酸耐蚀管线钢及其生产方法,不受氢原子腐蚀,提高了基体的抗酸腐蚀性能。
为了解决以上技术问题,本发明提供一种大厚壁抗酸耐蚀管线钢,其化学成分及重量百分比如下:C:0.01%~0.02%,Si:0.10%~0.35%,Mn:0.9%~1.40%,P≤0.012%,S≤0.0010%,Nb:0.020%~0.070%,Ti:0.006%~0.020%,Ni≤0.30%,Mo:0.10%~0.30%,Cr:0.10%~0.30%,Cu:0.10%~0.30%,Al:0.015%~0.050%,余量为Fe和杂质。
技术效果:本发明采用低于0.020%的超低碳设计,有效避免了厚壁管线轧板形成珠光体组织;适当使用Mo,可以有效增加大壁厚轧板的淬透性,利于心表组织的均匀性,并具有细化晶粒的作用;采用Ni设计,有利于细化组织晶粒度,形成致密的多边形铁素体组织,避免晶界受氢原子腐蚀;采用超低温奥氏体化工艺,有效降低了轧板厚度方向的组织晶粒度,得到心部晶粒尺寸小于30μm的超细晶粒组织,致密的组织阻止原子氢进入钢的基体。
本发明的另一目的在于提供一种应用于上述方案所述的大厚壁抗酸耐蚀管线钢生产方法,包括以下步骤:
S1、脱硫站采用石灰与镁粉进行复合脱硫,脱硫后扒渣干净,入炉铁水中S≤0.002%;
S2、转炉采用双渣法实现高温脱磷,吹炼至85%时进行副枪测温取样,此时提氧枪倒渣,倒渣结束后,根据副枪样进行二次吹炼,保证转炉出钢温度大于1680℃,成品P≤0.012%;
S3、转炉出钢采用弱脱氧方式,出钢加入500kg低碳锰铁,根据副枪定氧添加铝块,保证出钢后钢液内氧在50ppm~80ppm;
S4、钢水到达RH炉后,进行测温取样,温度在1580℃以上,真空度≤3.0mbar后进行脱碳处理,真空后C≤0.0050%后进行合金化处理,合金化结束后进行真空保持;
S5、钢水到达LF炉后,加石灰造渣,底搅氩气搅拌,硫控制在0.0010%以内,脱硫结束后进行钙处理;
S6、连铸过程采用全程保护浇注,过热度控制在10~20度,采用双辊电磁搅拌技术,低倍评级在C1.0级以内;
S7、加热炉采用步进式加热制度对铸坯进行加热处理,奥氏体化目标温度1110℃~1120℃,加热时间10min~13min/cm,均热时间60min以上;
S8、采用TMCP轧制工艺进行轧制,粗轧末道次压下率22%以上,二阶段开轧温度800℃~830℃,入水温度780℃~800℃,采用超快冷冷却至280℃~300℃,得到心部晶粒尺寸小于30μm的超细晶粒组织,组织类型为多边形铁素体/贝氏体型即(PF+B)。
本发明进一步限定的技术方案是:
进一步的,步骤S3中,600ppm氧增加20kg铝,此后,每增加100ppm氧增加10kg铝。
前所述的一种大厚壁抗酸耐蚀管线钢及其生产方法,步骤S5中,使用150m~200m无缝纯钙包芯线。
前所述的一种大厚壁抗酸耐蚀管线钢及其生产方法,步骤S5中,钙处理后静搅15min~20min。
本发明的有益效果是:
(1)本发明中超低温奥氏体化温度有效地细化了组织晶粒度,保证了大壁厚轧板心部30μm的超细晶粒组织,提高了基体抗酸腐蚀性能;
(2)本发明中钢水到达RH炉后,温度保持在1580℃以上,保证了钢液合金化后真空循环的流动性;
(3)本发明中真空度低于3.0mbar后进行脱碳处理,利用钢液中的氧去除碳;
(4)本发明中合金化结束后再进行真空保持,真空处理过程中不进行合金化操作,有效降低钢液的气体含量;
(5)本发明中钢水到达LF炉后,通过底搅氩气搅拌,达到脱硫目的;
(6)本发明中在钙处理后进行静搅,提高钢水纯净度;
(7)本发明中连铸过程采用双辊电磁搅拌技术,提升内部组织,控制中心偏析;
(8)本发明在产品设计上采用阻止原子氢进入钢的基体,低碳、低磷、低硫、晶粒细小组织致密,达到钢的基体满足抗酸耐蚀性能的思路,通过成分设计、低温奥氏体化温度、超快冷工艺,获得了心部30μm的超细多边形铁素体、贝氏体组织,从而得到了优异的抗酸耐蚀钢板。
附图说明
图1为实施例1轧制钢板在金相显微镜下典型的组织形貌图;
图2为实施例2轧制钢板在金相显微镜下典型的组织形貌图。
具体实施方式
实施例1
本实施例提供的一种大厚壁抗酸耐蚀管线钢生产方法,包括以下步骤:
S1、脱硫站采用石灰与镁粉进行复合脱硫,脱硫后扒渣干净,入炉铁水中S≤0.002%;
S2、转炉采用双渣法实现高温脱磷,吹炼至85%时进行副枪测温取样,此时提氧枪倒渣,倒渣结束后,根据副枪样进行二次吹炼,保证转炉出钢温度大于1680℃,成品P≤0.012%;
S3、转炉出钢采用弱脱氧方式,出钢加入500kg低碳锰铁,根据副枪定氧添加铝块,600ppm氧增加20kg铝,此后,每增加100ppm氧增加10kg铝,保证出钢后钢液内氧在50ppm~80ppm;
S4、钢水到达RH炉后,进行测温取样,温度在1580℃以上,真空度≤3.0mbar后进行脱碳处理,真空后C≤0.0050%后进行合金化处理,合金化结束后进行真空保持;
S5、钢水到达LF炉后,加石灰造渣,底搅氩气搅拌,硫控制在0.0010%以内,脱硫结束后进行钙处理,使用150m~200m无缝纯钙包芯线,钙处理后静搅15min~20min;
S6、连铸过程采用全程保护浇注,过热度控制在10~20度,采用双辊电磁搅拌技术,低倍评级在C1.0级以内;
S7、加热炉采用步进式加热制度对铸坯进行加热处理,奥氏体化目标温度1110℃~1120℃,加热时间10min~13min/cm,均热时间60min以上;
S8、采用TMCP轧制工艺进行轧制,粗轧末道次压下率22%以上,二阶段开轧温度800℃~830℃,入水温度780℃~800℃,采用超快冷冷却至280℃~300℃,得到心部晶粒尺寸小于30μm的超细晶粒组织,组织类型为多边形铁素体/贝氏体型即(PF+B)。
实施例2
本实施例提供的一种大厚壁抗酸耐蚀管线钢,运用实施例1所述生产方法生产,其成份按重量百分比如表1所示。
实施例3
本实施例提供的一种大厚壁抗酸耐蚀管线钢,运用实施例1所述生产方法生产,其成份按重量百分比如表1所示。
表1
观察图1、2所示实施例1、实施例2生产的管线钢的显微组织,可以发现基体上无明显的珠光体组织,大厚壁轧板心部组织小于30μm,晶粒细小且致密,抗酸耐蚀性能优异。
HIC性能如表2所示:
表2
SSC性能如表3所示:
浸泡溶液 | CLR% | CTR% | CSR% | |
实施例1 | A | 0 | 0 | 0 |
实施例2 | A | 0 | 0 | 0 |
表3
加载应力 | 试验时间 | EC裂纹 | 评定 | |
实施例1 | 0.8*Y.S(实际) | 720h | 无 | 合格 |
实施例2 | 0.8*Y.S(实际) | 720h | 无 | 合格 |
由表2、3可以看出,实施例1、2均具有优异的抗氢致裂纹性能,没有任何裂纹,完全满足NACE0177-2005标准中的指标:CLR≤10%,CTR≤3%,CSR≤2%,产品的HIC、SSC性能符合要求。
本发明采用不大于0.02%的超低碳设计,有效避免了厚壁管线内部珠光体组织的形成;适当增加Cr、Mo合金提高了大厚壁钢板的淬透性,利于心部组织的细化;超低温奥氏体化温度有利于原始奥氏体晶粒的细化,确保了轧板的组织晶粒度;超快冷工艺利于碳化物组织的贝氏体转变,促进了晶粒细化,并强化了晶界组织的致密,细小的晶粒组织有效阻止了氢原子在晶界间的扩散,得到了心部小于30μm的超细晶粒组织,组织类型为多边形铁素体/贝氏体型(PF+B),形状不规则的多边形铁素体与贝氏体交错分布,保证了钢的强度与韧性,保证了大壁厚钢板的抗酸耐蚀性能。
除上述实施例外,本发明还可以有其他实施方式。凡采用等同替换或等效变换形成的技术方案,均落在本发明要求的保护范围。
Claims (5)
1.一种大厚壁抗酸耐蚀管线钢,其特征在于,其化学成分及重量百分比如下:C:0.01%~0.02%,Si:0.10%~0.35%,Mn:0.9%~1.40%,P≤0.012%,S≤0.0010%,Nb:0.020%~0.070%,Ti:0.006%~0.020%,Ni≤0.30%,Mo:0.10%~0.30%,Cr:0.10%~0.30%,Cu:0.10%~0.30%,Al:0.015%~0.050%,Ca:0.0005%~0.0040%,余量为Fe和杂质。
2.一种应用于权利要求1所述的大厚壁抗酸耐蚀管线钢生产方法,其特征在于,包括以下步骤:
S1、脱硫站采用石灰与镁粉进行复合脱硫,脱硫后扒渣干净,入炉铁水中S≤0.002%;
S2、转炉采用双渣法实现高温脱磷,吹炼至85%时进行副枪测温取样,此时提氧枪倒渣,倒渣结束后,根据副枪样进行二次吹炼,保证转炉出钢温度大于1680℃,成品P≤0.012%;
S3、转炉出钢采用弱脱氧方式,出钢加入500kg低碳锰铁,根据副枪定氧添加铝块,保证出钢后钢液内氧在50ppm~80ppm;
S4、钢水到达RH炉后,进行测温取样,温度在1580℃以上,真空度≤3.0mbar后进行脱碳处理,真空后C≤0.0050%后进行合金化处理,合金化结束后进行真空保持;
S5、钢水到达LF炉后,加石灰造渣,底搅氩气搅拌,硫控制在0.0010%以内,脱硫结束后进行钙处理;
S6、连铸过程采用全程保护浇注,过热度控制在10~20度,采用双辊电磁搅拌技术,低倍评级在C1.0级以内;
S7、加热炉采用步进式加热制度对铸坯进行加热处理,奥氏体化目标温度1110℃~1120℃,加热时间10min~13min/cm,均热时间60min以上;
S8、采用TMCP轧制工艺进行轧制,粗轧末道次压下率22%以上,二阶段开轧温度800℃~830℃,入水温度780℃~800℃,采用超快冷冷却至280℃~300℃,得到心部晶粒尺寸小于30μm的超细晶粒组织,组织类型为多边形铁素体/贝氏体型即(PF+B)。
3.根据权利要求2所述的一种大厚壁抗酸耐蚀管线钢生产方法,其特征在于:所述步骤S3中,600ppm氧增加20kg铝,此后,每增加100ppm氧增加10kg铝。
4.根据权利要求2所述的一种大厚壁抗酸耐蚀管线钢生产方法,其特征在于:所述步骤S5中,使用150m~200m无缝纯钙包芯线。
5.根据权利要求2所述的一种大厚壁抗酸耐蚀管线钢生产方法,其特征在于:所述步骤S5中,钙处理后静搅15min~20min。
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WO2019233015A1 (zh) * | 2018-06-04 | 2019-12-12 | 南京钢铁股份有限公司 | 一种大厚壁抗酸耐蚀管线钢及其生产方法 |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20030053757A (ko) * | 2001-12-24 | 2003-07-02 | 주식회사 포스코 | 유화물 응력 부식 균열 저항성이 우수한 라인파이프 강 및그 제조방법 |
CN105088096A (zh) * | 2015-08-31 | 2015-11-25 | 山东钢铁股份有限公司 | 一种高应力比高止裂韧性的x80管线钢及其制备方法与应用 |
CN107151765A (zh) * | 2017-04-19 | 2017-09-12 | 南京钢铁股份有限公司 | 一种抗酸耐蚀管线钢及其生产方法 |
CN107557683A (zh) * | 2017-08-16 | 2018-01-09 | 南京钢铁股份有限公司 | 一种高磷铁水生产厚壁大口径抗酸耐蚀管线钢的方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2829775B1 (fr) * | 2001-09-20 | 2003-12-26 | Usinor | Procede de fabrication de tubes roules et soudes comportant une etape finale d'etirage ou d'hydroformage et tube soude ainsi obtenu |
JP5262075B2 (ja) * | 2007-11-14 | 2013-08-14 | 新日鐵住金株式会社 | 耐サワー性能に優れた鋼管用鋼の製造方法 |
CN102330034B (zh) * | 2011-09-30 | 2013-04-24 | 中国石油集团渤海石油装备制造有限公司 | 一种酸性腐蚀环境用x65ms钢级螺旋焊管及其制造方法 |
US20150176727A1 (en) * | 2012-06-18 | 2015-06-25 | Jfe Steel Corporation | Thick, high-strength, sour-resistant line pipe and method for producing same |
KR101757710B1 (ko) * | 2012-07-09 | 2017-07-14 | 제이에프이 스틸 가부시키가이샤 | 후육 고강도 내사우어 라인 파이프의 제조 방법 |
CN104789887B (zh) * | 2015-04-02 | 2017-03-01 | 江阴兴澄特种钢铁有限公司 | 一种超厚规格抗hic及抗ssccx65管线钢板及其制造方法 |
CN104928602A (zh) * | 2015-06-25 | 2015-09-23 | 江苏省沙钢钢铁研究院有限公司 | 一种耐h2s腐蚀的管线钢宽厚板及其生产方法 |
CN108624811B (zh) * | 2018-06-04 | 2020-07-14 | 南京钢铁股份有限公司 | 一种大厚壁抗酸耐蚀管线钢及其生产方法 |
-
2018
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20030053757A (ko) * | 2001-12-24 | 2003-07-02 | 주식회사 포스코 | 유화물 응력 부식 균열 저항성이 우수한 라인파이프 강 및그 제조방법 |
CN105088096A (zh) * | 2015-08-31 | 2015-11-25 | 山东钢铁股份有限公司 | 一种高应力比高止裂韧性的x80管线钢及其制备方法与应用 |
CN107151765A (zh) * | 2017-04-19 | 2017-09-12 | 南京钢铁股份有限公司 | 一种抗酸耐蚀管线钢及其生产方法 |
CN107557683A (zh) * | 2017-08-16 | 2018-01-09 | 南京钢铁股份有限公司 | 一种高磷铁水生产厚壁大口径抗酸耐蚀管线钢的方法 |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019233015A1 (zh) * | 2018-06-04 | 2019-12-12 | 南京钢铁股份有限公司 | 一种大厚壁抗酸耐蚀管线钢及其生产方法 |
CN109158557A (zh) * | 2018-09-30 | 2019-01-08 | 邯郸钢铁集团有限责任公司 | 一种倒角结晶器连铸机生产抗酸耐蚀管线钢板坯的方法 |
CN110343940A (zh) * | 2018-11-28 | 2019-10-18 | 张家港宏昌钢板有限公司 | 高耐蚀耐候钢的制造方法 |
CN109735769A (zh) * | 2019-03-14 | 2019-05-10 | 南京钢铁股份有限公司 | 一种b级抗酸管线钢板及制管方法 |
CN115821165A (zh) * | 2022-11-10 | 2023-03-21 | 舞阳钢铁有限责任公司 | 一种核电项目汽水分离器用钢板及其冶炼方法 |
CN115821165B (zh) * | 2022-11-10 | 2024-05-24 | 舞阳钢铁有限责任公司 | 一种核电项目汽水分离器用钢板及其冶炼方法 |
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