CN114433797A - 具有碳当量要求的石油套管及制备方法 - Google Patents
具有碳当量要求的石油套管及制备方法 Download PDFInfo
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- 239000003208 petroleum Substances 0.000 title claims abstract description 44
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 26
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 42
- 239000010959 steel Substances 0.000 claims description 42
- 238000010438 heat treatment Methods 0.000 claims description 18
- 238000005096 rolling process Methods 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 16
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 14
- 230000008520 organization Effects 0.000 claims description 14
- 238000005266 casting Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 11
- 238000010791 quenching Methods 0.000 claims description 11
- 230000000171 quenching effect Effects 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 11
- 238000009628 steelmaking Methods 0.000 claims description 11
- 238000009749 continuous casting Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 8
- 238000005496 tempering Methods 0.000 claims description 8
- 238000004513 sizing Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- 230000000717 retained effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 3
- 239000000126 substance Substances 0.000 abstract description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 239000011572 manganese Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 238000010891 electric arc Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- 238000009849 vacuum degassing Methods 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- 229910000617 Mangalloy Inorganic materials 0.000 description 1
- QFGIVKNKFPCKAW-UHFFFAOYSA-N [Mn].[C] Chemical compound [Mn].[C] QFGIVKNKFPCKAW-UHFFFAOYSA-N 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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Abstract
本发明涉及具有碳当量要求的石油套管,包括如下重量百分比的各组分:C:0.24~0.28;Si:0.17~0.32;Mn:1.17~1.32;P≤0.015;S≤0.01;Cr:0.16~0.25;Mo<0.1;Cu≤0.15;Al:0.01~0.04;V:0.06~0.09;Ni≤0.15;N≤0.009;O≤0.004;B:0.0005~0.002;Ti:0.008~0.02;余量为Fe。本发明套管的各项性能指标满足该钢级力学性能的要求,且经过化学成分的调控,石油套管的碳当量在0.49~0.63之间,符合碳当量的要求。
Description
技术领域
本发明属于石油化工管材技术领域,尤其涉及具有碳当量要求的石油套管及制备方法。
背景技术
API SPEC 5CT目录中常用的套管,参考该套管的化学成分要求可知,该套管的化学成分是典型的碳锰钢,按照该成分控制要求只考虑了强度、韧性及硬度等性能指标,没有考虑碳当量要求,若按碳当量公式计算,API SPEC 5CT目录中常用的套管对应不同钢级的化学成分无法满足碳当量要求。因此,需要设计一种新的化学成分,使其满足碳当量的要求,同时在炼钢、轧制、热处理后,套管的各项性能指标满足该钢级力学性能的要求。
发明内容
本发明解决其技术问题是采取以下技术方案实现的:
具有碳当量要求的石油套管,所述石油套管包括如下重量百分比的各组分:
C:0.24~0.28;
Si:0.17~0.32;
Mn:1.17~1.32;
P≤0.015;
S≤0.01;
Cr:0.16~0.25;
Mo<0.1;
Cu≤0.15;
Al:0.01~0.04;
V:0.06~0.09;
Ni≤0.15;
N≤0.009;
O≤0.004;
B:0.0005~0.002;
V:0.06~0.09;
Ti:0.008~0.02;
余量为Fe。
所述的具有碳当量要求的石油套管的制备方法,包括如下步骤:
获取炼钢原料,经处理获得符合各组分质量含量要求的钢水,经连铸工序,浇铸成连铸坯;
将获得的铸坯进行斜轧热穿孔、PQF三辊限动芯棒热连轧、热定径;
采用淬火加回火的热处理工艺进行热处理:淬火温度为900℃±5℃,淬火介质为水,回火温度为(560~700)℃±5℃,表面除磷,空气冷却;热处理后,进行热矫直处理,冷却,探伤。
进一步的,对铸坯进行轧制时:将冷却后的铸坯在环形加热炉内加热,环形炉炉温为1280℃~1330℃;热穿孔时温度为1200℃~1250℃;PQF三辊连轧时的温度为1020℃~1130℃。
进一步的,所述石油套管的尺寸特征为:
外径:0.3%~1.0%D;D代表公称外径;
壁厚公差带控制:-10%t;t代表公称壁厚;
外径不圆度≤0.5%;
壁厚不均度≤14%。
进一步的,所述石油套管为80ksi钢级、90ksi钢级、95ksi钢级、110ksi钢级或125ksi钢级石油套管。
进一步的,
当石油套管为80ksi钢级石油套管时,具备的材料力学性能指标及组织特征为:屈服强度552~655MPa,抗拉强度≥655MPa;横向全尺寸夏比V型缺口冲击值≥130J,纵向全尺寸夏比V型缺口冲击值≥160J,洛氏硬度值≤23.0HRC,晶粒度≥9.0级,管组织为回火索氏体;
当石油套管为90ksi钢级石油套管时,具备的材料力学性能指标及组织特征为:屈服强度621~724MPa,抗拉强度≥689MPa;横向全尺寸夏比V型缺口冲击值≥120J,纵向全尺寸夏比V型缺口冲击值≥150J,洛氏硬度值≤25.4HRC,晶粒度≥9.0级,管组织为回火索氏体;
当石油套管为95ksi钢级石油套管时,具备的材料力学性能指标及组织特征为:屈服强度655~758MPa,抗拉强度≥724MPa;横向全尺寸夏比V型缺口冲击值≥110J,纵向全尺寸夏比V型缺口冲击值≥140J,洛氏硬度值≤25.4HRC,晶粒度≥9.0级,管组织为回火索氏体;
当石油套管为110ksi钢级石油套管时,具备的材料力学性能指标及组织特征为:屈服强度758~965MPa,抗拉强度≥862MPa;横向全尺寸夏比V型缺口冲击值≥100J,纵向全尺寸夏比V型缺口冲击值≥130J,晶粒度≥9.0级,管组织为回火索氏体;
当石油套管为125ksi钢级石油套管时,具备的材料力学性能指标及组织特征为:屈服强度862~1034MPa,抗拉强度≥931MPa;横向全尺寸夏比V型缺口冲击值≥80J,纵向全尺寸夏比V型缺口冲击值≥100J,晶粒度≥9.0级,管组织为回火索氏体。
本发明的优点和积极效果是:
本发明通过采用新的化学成分,使石油套管满足碳当量的要求,同时在炼钢、轧制、热处理后,套管的各项性能指标满足该钢级力学性能的要求,且经过化学成分的调控,石油套管的碳当量在0.49~0.63之间,符合碳当量的要求。
具体实施方式
首先,需要说明的是,以下将以示例方式来具体说明本发明的具体结构、特点和优点等,然而所有的描述仅是用来进行说明的,而不应将其理解为对本发明形成任何限制。此外,在本文所提及各实施例中予以描述或隐含的任意单个技术特征,仍然可在这些技术特征(或其等同物)之间继续进行任意组合或删减,从而获得可能未在本文中直接提及的本发明的更多其他实施例。
需要说明的是,在不冲突的情况下,本申请中的实施例及实施例中的特征可以相互组合。
实施例1
具有碳当量要求的石油套管,所述石油套管包括如下重量百分比的各组分:
C:0.24~0.28;
Si:0.17~0.32;
Mn:1.17~1.32;
P≤0.015;
S≤0.01;
Cr:0.16~0.25;
Mo<0.1;
Cu≤0.15;
Al:0.01~0.04;
V:0.06~0.09;
Ni≤0.15;
N≤0.009;
O≤0.004;
B:0.0005~0.002;
V:0.06~0.09;
Ti:0.008~0.02;
余量为Fe。
所述的具有碳当量要求的石油套管的制备方法,包括如下步骤:
获取炼钢原料,可以采用铁水+优质废钢原料或全冷料+优质废钢原料,用电弧炉熔化成钢水,经炉外精炼和真空脱气获得如上所述的化学成分,经连铸工序,浇铸成连铸坯;
将获得的铸坯进行斜轧热穿孔、PQF三辊限动芯棒热连轧、热定径;具体的,对铸坯进行轧制时:将冷却后的铸坯在环形加热炉内加热,环形炉炉温为1280℃~1330℃;热穿孔时温度为1200℃~1250℃;PQF三辊连轧时的温度为1020℃~1130℃;
采用淬火加回火的热处理工艺进行热处理:淬火温度为900℃±5℃,淬火介质为水,回火温度为(560~700)℃±5℃,表面除磷,空气冷却;热处理后,进行热矫直处理,冷却,探伤。
所述石油套管的尺寸特征为:
外径:0.3%~1.0%D,D代表公称外径;
壁厚公差带控制:-10%t,t代表公称壁厚;
外径不圆度≤0.5%;
壁厚不均度≤14%。
并且,所述石油套管为80ksi钢级、90ksi钢级、95ksi钢级、110ksi钢级或125ksi钢级石油套管;当石油套管为80ksi钢级石油套管时,具备的材料力学性能指标及组织特征为:屈服强度552~655MPa,抗拉强度≥655MPa;横向全尺寸夏比V型缺口冲击值≥130J,纵向全尺寸夏比V型缺口冲击值≥160J,洛氏硬度值≤23.0HRC,晶粒度≥9.0级,管组织为回火索氏体;当石油套管为90ksi钢级石油套管时,具备的材料力学性能指标及组织特征为:屈服强度621~724MPa,抗拉强度≥689MPa;横向全尺寸夏比V型缺口冲击值≥120J,纵向全尺寸夏比V型缺口冲击值≥150J,洛氏硬度值≤25.4HRC,晶粒度≥9.0级,管组织为回火索氏体;当石油套管为95ksi钢级石油套管时,具备的材料力学性能指标及组织特征为:屈服强度655~758MPa,抗拉强度≥724MPa;横向全尺寸夏比V型缺口冲击值≥110J,纵向全尺寸夏比V型缺口冲击值≥140J,洛氏硬度值≤25.4HRC,晶粒度≥9.0级,管组织为回火索氏体;当石油套管为110ksi钢级石油套管时,具备的材料力学性能指标及组织特征为:屈服强度758~965MPa,抗拉强度≥862MPa;横向全尺寸夏比V型缺口冲击值≥100J,纵向全尺寸夏比V型缺口冲击值≥130J,晶粒度≥9.0级,管组织为回火索氏体;当石油套管为125ksi钢级石油套管时,具备的材料力学性能指标及组织特征为:屈服强度862~1034MPa,抗拉强度≥931MPa;横向全尺寸夏比V型缺口冲击值≥80J,纵向全尺寸夏比V型缺口冲击值≥100J,晶粒度≥9.0级,管组织为回火索氏体。
实施例2
所述套管的化学成分(重量百分比)如下表1所示,余量为Fe:
表1 L80-1 114.3×8.56化学成分
项目 | C | Si | Mn | P | S | Ni | Cr | Mo | Cu | Al | V | Ti | B | O | N |
MAX | 0.27 | 0.27 | 1.32 | 0.009 | 0.003 | 0.04 | 0.23 | 0.03 | 0.07 | 0.03 | 0.07 | 0.018 | 0.002 | 0.0038 | 0.0076 |
MIN | 0.25 | 0.23 | 1.18 | 0.006 | 0.002 | 0.03 | 0.18 | 0.01 | 0.06 | 0.023 | 0.06 | 0.013 | 0.0007 | 0.0008 | 0.0061 |
采用铁水+优质废钢作为炼钢原料,用电弧炉将炼钢原料熔化为钢水,经炉外精炼和VD/RH高真空脱气,获得上述化学成分,经连铸工序浇铸成连铸坯;环形加热炉加热后,经热定心、热穿孔、PQF三辊热连轧,热定径,冷却,锯切,矫直,探伤;热处理炉内900℃±5℃温度下奥氏体化,然后水淬冷却,715℃±5℃温度下回火,空气冷却,热矫直后,冷却,探伤。
计算获得的碳当量为0.52~0.58,其中计算公式如下:
其中,C、Si、Mn、Cu、Ni、Cr、Mo、V分别代表各自的质量百分比。
轧制后,钢管的几何尺寸为:外径不圆度≤0.2%,壁厚不均度≤5%;
热处理后,所述套管的力学性能指标如下:
屈服强度:568-655MPa;抗拉强度:665-755MPa;断后伸长率:≥20%;冲击值及剪切比:夏比V型缺口冲击值纵向10×5尺寸≥90J,剪切比为100%;夏比V型缺口冲击值纵向全尺寸≥163J,剪切比为100%;洛氏硬度值:16.2~22.6HRC;淬透性:≥47.0HRC;
实施例3
所述套管的化学成分(重量百分比)如下表2所示,余量为Fe:
项目 | C | Si | Mn | P | S | Ni | Cr | Mo | Cu | Al | V | Ti | B | O | N |
检测值 | 0.25 | 0.26 | 1.23 | 0.009 | 0.002 | 0.04 | 0.19 | 0.03 | 0.06 | 0.028 | 0.07 | 0.016 | 0.0013 | 0.0018 | 0.0062 |
采用铁水+优质废钢作为炼钢原料,用电弧炉将炼钢原料熔化为钢水,经炉外精炼和VD/RH高真空脱气,获得上述化学成分,经连铸工序浇铸成连铸坯;环形加热炉加热后,经热定心、热穿孔、PQF三辊热连轧,热定径,冷却,锯切,矫直,探伤;热处理炉内900℃±5℃温度下奥氏体化,然后水淬冷却,710℃±5℃温度下回火,空气冷却,热矫直后,冷却,探伤。
计算获得的碳当量为0.54,其中计算公式如下:
其中,C、Si、Mn、Cu、Ni、Cr、Mo、V分别代表各自的质量百分比。
轧制后,钢管的几何尺寸为:外径不圆度≤0.2%,壁厚不均度≤5%;
热处理后,所述套管的力学性能指标如下:
屈服强度:590-655MPa;抗拉强度:705-767MPa;断后伸长率:≥30%;冲击值及剪切比:夏比V型缺口冲击值横向10×7.5尺寸≥150J,剪切比为100%;夏比V型缺口冲击值横向全尺寸≥187J,剪切比为100%;洛氏硬度值:16.9~22.9HRC;淬透性:≥47.0HRC。
以上实施例对本发明进行了详细说明,但所述内容仅为本发明的较佳实施例,不能被认为用于限定本发明的实施范围。凡依本发明申请范围所作的均等变化与改进等,均应仍归属于本发明的专利涵盖范围之内。
Claims (6)
1.具有碳当量要求的石油套管,其特征在于,所述石油套管包括如下重量百分比的各组分:
C:0.24~0.28;
Si:0.17~0.32;
Mn:1.17~1.32;
P≤0.015;
S≤0.01;
Cr:0.16~0.25;
Mo<0.1;
Cu≤0.15;
Al:0.01~0.04;
V:0.06~0.09;
Ni≤0.15;
N≤0.009;
O≤0.004;
B:0.0005~0.002;
Ti:0.008~0.02;
余量为Fe。
2.权利要求1所述的具有碳当量要求的石油套管的制备方法,其特征在于,包括如下步骤:
获取炼钢原料,经处理获得符合各组分质量含量要求的钢水,经连铸工序,浇铸成连铸坯;
将获得的铸坯进行斜轧热穿孔、PQF三辊限动芯棒热连轧、热定径;
采用淬火加回火的热处理工艺进行热处理:淬火温度为900℃±5℃,淬火介质为水,回火温度为(560~700)℃±5℃,表面除磷,空气冷却;热处理后,进行热矫直处理,冷却,探伤。
3.根据权利要求2所述的具有碳当量要求的石油套管的制备方法,其特征在于,对铸坯进行轧制时:将冷却后的铸坯在环形加热炉内加热,环形炉炉温为1280℃~1330℃;热穿孔时温度为1200℃~1250℃;PQF三辊连轧时的温度为1020℃~1130℃。
4.根据权利要求2所述的具有碳当量要求的石油套管的制备方法,其特征在于,所述石油套管的尺寸特征为:
外径:0.3%~1.0%D;
壁厚公差带控制:-10%t;
外径不圆度≤0.5%;
壁厚不均度≤14%。
5.根据权利要求2所述的具有碳当量要求的石油套管的制备方法,其特征在于,所述石油套管为80ksi钢级、90ksi钢级、95ksi钢级、110ksi钢级或125ksi钢级石油套管。
6.根据权利要求5所述的具有碳当量要求的石油套管的制备方法,其特征在于,
当石油套管为80ksi钢级石油套管时,具备的材料力学性能指标及组织特征为:屈服强度552~655MPa,抗拉强度≥655MPa;横向全尺寸夏比V型缺口冲击值≥130J,纵向全尺寸夏比V型缺口冲击值≥160J,洛氏硬度值≤23.0HRC,晶粒度≥9.0级,管组织为回火索氏体;
当石油套管为90ksi钢级石油套管时,具备的材料力学性能指标及组织特征为:屈服强度621~724MPa,抗拉强度≥689MPa;横向全尺寸夏比V型缺口冲击值≥120J,纵向全尺寸夏比V型缺口冲击值≥150J,洛氏硬度值≤25.4HRC,晶粒度≥9.0级,管组织为回火索氏体;
当石油套管为95ksi钢级石油套管时,具备的材料力学性能指标及组织特征为:屈服强度655~758MPa,抗拉强度≥724MPa;横向全尺寸夏比V型缺口冲击值≥110J,纵向全尺寸夏比V型缺口冲击值≥140J,洛氏硬度值≤25.4HRC,晶粒度≥9.0级,管组织为回火索氏体;
当石油套管为110ksi钢级石油套管时,具备的材料力学性能指标及组织特征为:屈服强度758~965MPa,抗拉强度≥862MPa;横向全尺寸夏比V型缺口冲击值≥100J,纵向全尺寸夏比V型缺口冲击值≥130J,晶粒度≥9.0级,管组织为回火索氏体;
当石油套管为125ksi钢级石油套管时,具备的材料力学性能指标及组织特征为:屈服强度862~1034MPa,抗拉强度≥931MPa;横向全尺寸夏比V型缺口冲击值≥80J,纵向全尺寸夏比V型缺口冲击值≥100J,晶粒度≥9.0级,管组织为回火索氏体。
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