CN111020409B - 一种高强度微合金钢、水下油气管线快速连接器及制造方法 - Google Patents
一种高强度微合金钢、水下油气管线快速连接器及制造方法 Download PDFInfo
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Abstract
本发明公开了一种高强度微合金钢、水下油气管线快速连接器及制造方法,制造加热温度≤1180℃,保温时间按照0.5小时/英寸‑1.5小时/英寸;加热温度≤1180℃;采用液压机WHF锻造法+锻锤FM锻造法将钢锭进行横向纵向三次反复镦拔,单次锻造比>2,整个锻造过程温度控制在900‑1180℃;热处理,采用960℃正火,920℃淬火,610℃回火,保温时间1.0小时/英寸。本发明的有益效果是通过成分设计、锻造及热处理工艺优化制造的特大壁厚快速连接器锻件具备非常优良的可焊性和低温性能,解决了现有材质生产的快速连接器造成深海油气生产设备及输送管线设计结构复杂,工序繁琐,施工困难,运营维护成本高等问题。
Description
技术领域
本发明属于海洋油气生产设备技术领域,尤其涉及一种高强度微合金钢、水下油气管线快速连接器及制造方法。
背景技术
作业水深超过1500米的超深海油气生产设备及输送管线的快速连接器,属于主体核心部件。现有技术中,快速连接器锻件材料一般采用美标ASTM A182 F22级别材料或小壁厚普通F65级别材料。缺点是,ASTM A182 F22级别材料的可焊性较差,焊接后必须进行焊后热处理,对现场施工造成较大难度并且大幅提高成本;标准F65微合金钢属于低碳钢加以微合金化处理,淬透性较差,即一般在管线大量采用。在石油天然气管线(简称油气管线)领域的管线应用,其锻件壁厚<100mm。当锻件壁厚超过100mm时,需要综合考虑其可焊性限制(碳当量要求、焊接裂纹敏感系数),锻件的强韧性超出材料性能极限,产生了不稳定性,导致强度与低温韧性不得予以匹配,极其难以控制。使用普通F65级别材料时,确保冲击性能的情况下,锻件中心位置的屈服强度低于450MPa,相同的结果在意大利某知名深海锻件制造厂同样出现,并且一直没有获得解决方案。当调整工艺保证锻件中心位置屈服强度达到450MPa要求后,低温冲击-29℃和-46℃夏比冲击试验结果出现单个最低不满足要求的现象,其同一组三个冲击值的偏差极大,相差10倍以上。小壁厚普通F65级别材料锻件则造成设备整机结构复杂,安全系数降低,不便于安装及维护,后期维护成本巨大。而锻件需要考虑产品结构设计的标准化与模块化,其材料尺寸的设计和选择不得不面临大壁厚,超临界状态的挑战。
发明内容
为克服现有技术的不足,本发明的目的在于提供一种高强度微合金钢、水下油气管线快速连接器及制造方法,通过成分设计、锻造及热处理工艺优化制造的特大壁厚(壁厚>200mm)快速连接器锻件具备非常优良的可焊性和低温性能,解决现有材质生产的快速连接器造成深海油气生产设备及输送管线设计结构复杂,工序繁琐,施工困难,运营维护成本高等问题。
为实现上述目的,本发明采用如下技术方案:
一种高强度微合金钢,其特点是该高强度微合金钢的重量组份包括:C:0.00-0.12%,Si:0.20-0.45%,Mn:1.10-1.40%,P:0.000-0.015%,S:0.000-0.010%,Cr:0.10-0.50%,Ni:0.50-0.99%,Mo:0.15-0.50%,Cu:0.000-0.30%,Ti:0.000-0.025%,Bi:0.000-0.010%,Nb:0.000-0.020%,Al:0.020-0.055%,Sn:0.000-0.015%,V:0.000-0.060%,B:0.0000-0.0005%,Pb:0.000-0.010%,As:0.000-0.020%,Sb:0.000-0.020%,Ca:0.000-0.005%,其余为Fe,碳当量Ce<0.43。
在本发明一个具体的实施例中,所述高强度微合金钢的重量组份包括:C:0.08-0.10%,Si:0.20-0.40%,Mn:1.15-1.30%,P:0.005-0.015%,S:0.001-0.006%,Cr:0.10-0.30%,Ni:0.60-0.90%,Mo:0.20-0.30%,Cu:0.060-0.20%,Ti:0.000-0.009%,Bi:0.000-0.0017%,Nb:0.000-0.005%,Al:0.020-0.040%,Sn:0.001-0.010%,V:0.000-0.040%,B:0.0001-0.0004%,Pb:0.000-0.0015%,As:0.001-0.005%,Sb:0.000-0.003%,Ca:0.000-0.001%,其余为Fe,碳当量Ce<0.43。
本发明的另一个目的在于提供一种水下油气管线快速连接器,其特点是该水下油气管线快速连接器由上述高强度微合金钢为原料进行制备;该快速连接器锻件用于作业水深超过1500米的超深海油气生产设备及输送管线。
本发明的另一个目的在于提供一种水下油气管线快速连接器的制造方法,其特点是包括如下工艺步骤:
A)钢锭成分设计,按重量组份包括:C:0.00-0.12%,Si:0.20-0.45%,Mn:1.10-1.40%,P:0.000-0.015%,S:0.000-0.010%,Cr:0.10-0.50%,Ni:0.50-0.99%,Mo:0.15-0.50%,Cu:0.000-0.30%,Ti:0.000-0.025%,Bi:0.000-0.010%,Nb:0.000-0.020%,Al:0.020-0.055%,Sn:0.000-0.015%,V:0.000-0.060%,B:0.0000-0.0005%,Pb:0.000-0.010%,As:0.000-0.020%,Sb:0.000-0.020%,Ca:0.000-0.005%,其余为Fe,碳当量Ce<0.43;
B)锻造,加热温度≤1180℃,保温时间按照0.5小时/英寸-1.5小时/英寸,保温时间不宜过长,有效控制晶粒尺寸;加热温度≤1180℃,不宜过高,防止在出炉锻造时,材料芯部的始锻温度过高,加上变形的过程中晶粒与晶粒之间的摩擦升温导致晶界熔化***;采用液压机WHF锻造法+锻锤FM锻造法将钢锭进行横向纵向三次反复镦拔,单次锻造比>2,整个锻造过程温度控制在900-1180℃,温降至接近下限时立即回炉加热;
C)热处理,采用960℃正火,920℃淬火,610℃回火,保温时间1.0小时/英寸,按照最大壁厚的尺寸进行计算。
在本发明一个具体的实施例中,所述钢锭成分按重量组份包括:C:0.08-0.10%,Si:0.20-0.40%,Mn:1.15-1.30%,P:0.005-0.015%,S:0.001-0.006%,Cr:0.10-0.30%,Ni:0.60-0.90%,Mo:0.20-0.30%,Cu:0.060-0.20%,Ti:0.000-0.009%,Bi:0.000-0.0017%,Nb:0.000-0.005%,Al:0.020-0.040%,Sn:0.001-0.010%,V:0.000-0.040%,B:0.0001-0.0004%,Pb:0.000-0.0015%,As:0.001-0.005%,Sb:0.000-0.003%,Ca:0.000-0.001%,其余为Fe,碳当量Ce<0.43。
在本发明一个具体的实施例中,所述步骤C热处理步骤中装炉时考虑锻件的几何结构,内孔在淬火时有足够的冷却效果;通孔产品垂直放置,盲孔产品则加装高压水喷射装置,将沉积在内部的高温水排除,促进冷却效果。
本发明的有益效果是:通过成分设计、锻造及热处理工艺优化制造的特大壁厚(壁厚>200mm)快速连接器锻件具备非常优良的可焊性和低温性能,解决了现有材质生产的快速连接器造成深海油气生产设备及输送管线设计结构复杂,工序繁琐,施工困难,运营维护成本高等问题,施工简易,快速连接器锻件实现模块化、标准化生产,用于作业水深超过1500米的超深海油气生产设备及输送管线。
具体实施方式
下面结合具体实施例对本发明作进一步说明。
实施例1
一种水下油气管线快速连接器的制造方法,壁厚>200mm,包括如下工艺步骤:
A)钢锭成分设计,按重量组份包括C:0.08-0.10%,Si:0.20-0.40%,Mn:1.15-1.30%,P:0.005-0.015%,S:0.001-0.006%,Cr:0.10-0.30%,Ni:0.60-0.90%,Mo:0.20-0.30%,Cu:0.060-0.20%,Ti:0.000-0.009%,Bi:0.000-0.0017%,Nb:0.000-0.005%,Al:0.020-0.040%,Sn:0.001-0.010%,V:0.000-0.040%,B:0.0001-0.0004%,Pb:0.000-0.0015%,As:0.001-0.005%,Sb:0.000-0.003%,Ca:0.000-0.001%,其余为Fe,碳当量Ce<0.43;
B)锻造,加热温度≤1180℃,保温时间按照0.5小时/英寸-1.5小时/英寸,保温时间不宜过长,有效控制晶粒尺寸;加热温度≤1180℃,不宜过高,防止在出炉锻造时,材料芯部的始锻温度过高,加上变形的过程中晶粒与晶粒之间的摩擦升温导致晶界熔化***;采用液压机WHF锻造法+锻锤FM锻造法将钢锭进行横向纵向三次反复镦拔,单次锻造比>2,整个锻造过程温度控制在900-1180℃,温降至接近下限时立即回炉加热;
C)热处理,采用960℃正火,920℃淬火,610℃回火,保温时间1.0小时/英寸,按照最大壁厚的尺寸进行计算。
步骤C热处理步骤中装炉时考虑锻件的几何结构,内孔在淬火时有足够的冷却效果;通孔产品垂直放置,盲孔产品则加装高压水喷射装置,将沉积在内部的高温水排除,促进冷却效果。
将实施例1制造的快速连接器进行机械性能测试,结果如下表指标:
注:Long表示纵向,Tran表示纵向;T为工件以英寸计量的厚度值。
实施例2
与实施例1的不同之处在于,钢锭成分按重量组份包括C:0.00-0.12%,Si:0.20-0.45%,Mn:1.10-1.40%,P:0.000-0.015%,S:0.000-0.010%,Cr:0.10-0.50%,Ni:0.50-0.99%,Mo:0.15-0.50%,Cu:0.000-0.30%,Ti:0.000-0.025%,Bi:0.000-0.010%,Nb:0.000-0.020%,Al:0.020-0.055%,Sn:0.000-0.015%,V:0.000-0.060%,B:0.0000-0.0005%,Pb:0.000-0.010%,As:0.000-0.020%,Sb:0.000-0.020%,Ca:0.000-0.005%,其余为Fe,碳当量Ce<0.43。
对比例
使用普通F65级别材料时,确保冲击性能的情况下,锻件中心位置的屈服强度低于450MPa。
调整工艺保证锻件中心位置屈服强度达到450MPa要求后,低温冲击-29℃和-46℃夏比冲击试验结果出现单个最低不满足要求的现象,其同一组三个冲击值的偏差极大,相差10倍以上。
上述的实施例仅例示性说明本发明创造的原理及其功效,以及部分运用的实施例,而非用于限制本发明;应当指出,对于本领域的普通技术人员来说,在不脱离本发明创造构思的前提下,还可以做出若干变形和改进,这些都属于本发明的保护范围。
Claims (2)
1.一种水下油气管线快速连接器的制造方法,其特征在于包括如下工艺步骤:
A)钢锭成分设计,按重量组份包括:C:0.00-0.12%,Si:0.20-0.45%,Mn:1.10-1.40%,P:0.000-0.015%,S:0.000-0.010%,Cr:0.10-0.50%,Ni:0.50-0.99%,Mo:0.15-0.50%,Cu:0.000-0.30%,Ti:0.000-0.025%,Bi:0.000-0.010%,Nb:0.000-0.020%,Al:0.020-0.055%,Sn:0.000-0.015%,V:0.000-0.060%,B:0.0000-0.0005%,Pb:0.000-0.010%,As:0.000-0.020%,Sb:0.000-0.020%,Ca:0.000-0.005%,其余为Fe,碳当量Ce<0.43,其中,Ti、Bi、Nb、Sn、V、B、Pb、As、Sb、Ca的取值均>0;
B)锻造,加热温度≤1180℃,保温时间按照0.5小时/英寸-1.5小时/英寸;加热温度≤1180℃;采用液压机WHF锻造法+锻锤FM锻造法将钢锭进行横向纵向三次反复镦拔,单次锻造比>2,整个锻造过程温度控制在900-1180℃,温降至接近下限时立即回炉加热;
C)热处理,采用960℃正火,920℃淬火,610℃回火,保温时间1.0小时/英寸,按照最大壁厚的尺寸进行计算。
2.根据权利要求1所述一种水下油气管线快速连接器的制造方法,其特征在于所述钢锭成分按重量组份包括:C:0.08-0.10%,Si:0.20-0.40%,Mn:1.15-1.30%,P:0.005-0.015%,S:0.001-0.006%,Cr:0.10-0.30%,Ni:0.60-0.90%,Mo:0.20-0.30%,Cu:0.060-0.20%,Ti:0.000-0.009%,Bi:0.000-0.0017%,Nb:0.000-0.005%,Al:0.020-0.040%,Sn:0.001-0.010%,V:0.000-0.040%,B:0.0001-0.0004%,Pb:0.000-0.0015%,As:0.001-0.005%,Sb:0.000-0.003%,Ca:0.000-0.001%,其余为Fe,碳当量Ce<0.43,Ti、Bi、Nb、V、Pb、Sb、Ca的取值均>0。
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