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Effect of liquid nitriding at 400–670 ℃ on microstructure and properties of C110 Steel
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作者 闫静 王均 +4 位作者 谷坛 潘东 王单奇 林元华 范洪远 《Journal of Central South University》 SCIE EI CAS CSCD 2017年第2期325-334,共10页
Liquid nitriding of Cll0 steel was conducted in a wide range of temperatures (400-670 ℃) using a kind of chemical heat-treatments, and the hardness, mechanical and corrosion properties of the nitrided surface were ... Liquid nitriding of Cll0 steel was conducted in a wide range of temperatures (400-670 ℃) using a kind of chemical heat-treatments, and the hardness, mechanical and corrosion properties of the nitrided surface were evaluated. Experimental results revealed that the microstructure and phase constituents of the nitrided surface alloy are highly depended on the processing condition. When C 110 steel was subjected to liquid nitriding at 430 ℃, the nitrided layer was almost composed of a thin e-Fe2-3N layer. When C 110 steel was subjected to liquid nitriding at 640 ℃, the phase composition of the nitrided layer was greatly changed. The nitrided layer depth increased significantly with increasing the treating temperature. The liquid nitriding effectively improved the surface hardness. After liquid nitriding, the absorption energy of the treated sample decreased and the tensile strength increased by Charpy V-notch (CVN) test. But the elongation of treated sample decreased. The reason is that the nitrided layer of sample is hardened and there is brittlement by diffusion of nitrogen atom. Despite of treatment temperature, the liquid nitriding can improve the corrosion. After being nitrided at 430 ℃, the nitrided layer of the C110 steel was mainly composed by e-Fe2 3N, which has excellent corrosion resistance and high microhardness, the nitrided sample has the best corrosion resistance. After nitriding temperature over 580 ℃, especially at 680 ℃, the sample's surface was covered by the thick oxide layer, which has very low hardness and corrosion resistance. So, the corrosion resistance of samples is severely compromised. 展开更多
关键词 liquid nitriding treated temperature c110 steel corrosion HARDNESS properties
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C110套管用HS05钢的热处理工艺研究
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作者 张戟 周田云 李飞 《钢管》 CAS 2023年第6期63-67,共5页
通过对C110套管用HS05钢进行不同工艺热处理,对试样进行力学性能测试及微观组织分析,研究了不同热处理工艺对HS05钢组织和性能的影响。结果表明:在相同回火条件下(700℃×100 min),对HS05钢采用不同淬火工艺(880℃,920℃)热处理均... 通过对C110套管用HS05钢进行不同工艺热处理,对试样进行力学性能测试及微观组织分析,研究了不同热处理工艺对HS05钢组织和性能的影响。结果表明:在相同回火条件下(700℃×100 min),对HS05钢采用不同淬火工艺(880℃,920℃)热处理均可得到理想的组织性能。相同淬火条件下,保持马氏体位相板条结构的合并及多边形化使得钢的冲击功随着回火温度的升高而升高。 展开更多
关键词 无缝钢管 油套管 c110 HS05 热处理 力学性能
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外加电位对C110钢抗硫化物应力开裂及氢渗透行为的影响 被引量:2
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作者 赵国仙 李婷 +3 位作者 谢俊峰 吕祥鸿 薛艳 钟强 《机械工程材料》 CSCD 北大核心 2017年第5期11-16,共6页
通过C110钢的硫化物应力开裂试验和氢渗透试验,研究了外加电位对C110钢抗硫化物应力开裂及氢渗透行为的影响,并对其开裂机制进行了探讨。结果表明:当加载应力为C110钢屈服强度的85%、未外加电位时,C110钢通过了NACE TM 0177-2016标准A... 通过C110钢的硫化物应力开裂试验和氢渗透试验,研究了外加电位对C110钢抗硫化物应力开裂及氢渗透行为的影响,并对其开裂机制进行了探讨。结果表明:当加载应力为C110钢屈服强度的85%、未外加电位时,C110钢通过了NACE TM 0177-2016标准A法检测,具有良好的抗硫化物应力开裂性能,而外加-100mV和+100mV电位(相对于开路电位)时,C110钢试样发生了断裂,硫化物应力开裂敏感性增强;外加阳极电位时,开裂机制与阳极溶解有关;外加阴极电位时,开裂机制与阴极析氢有关;随着外加阴极电位的增大,稳态氢渗透电流密度增大,次表面氢浓度增大,硫化物应力开裂的敏感性增强。 展开更多
关键词 c110 硫化物应力开裂 氢渗透 外加电位
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Effect of Plastic Deformation and H_2S on Dynamic Fracture Toughness of High Strength Casing Steel 被引量:1
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作者 曾德智 ZHANG Naiyan +3 位作者 TIAN Gang HU Junying ZHANG Zhi SHI Taihe 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2015年第2期397-403,共7页
The effects of plastic deformation and H2 S on fracture toughness of high strength casing steel(C110 steel) were investigated. The studied casing specimens are as follows: original casing, plastic deformation(PD)... The effects of plastic deformation and H2 S on fracture toughness of high strength casing steel(C110 steel) were investigated. The studied casing specimens are as follows: original casing, plastic deformation(PD) casing and PD casing after being immersed in NACE A solution saturated with H2S(PD+H2S). Instrumented impact method was employed to evaluate the impact behaviors of the specimens, meanwhile, dynamic fracture toughness(JId) was calculated by using Rice model and Schindler model. The experimental results show that dynamic fracture toughness of the casing decreases after plastic deformation. Compared with that of the original casing and PD casing, the dynamic fracture toughness decreases further when the PD casing immersed in H2 S, moreover, there are ridge-shaped feature and many secondary cracks present on the fracture surface of the specimens. Impact fracture mechanism of the casing is proposed as follows: the plastic deformation results in the increase of defect density of materials where the atomic hydrogen can accumulate in reversible or irreversible traps and even recombine to form molecular hydrogen, subsequently, the casing material toughness decreases greatly. 展开更多
关键词 sour gas fields high strength casing c110 steel plastic deformation H2S fracture toughness
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盐浴渗氮对C110钢耐冲刷腐蚀性能的影响 被引量:2
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作者 潘东 林元华 +3 位作者 罗德福 曾德志 黄润波 王均 《材料热处理学报》 EI CAS CSCD 北大核心 2013年第S2期216-220,共5页
为了提高C110钢的耐腐蚀和耐冲刷性能,对C110钢在430~640℃下进行盐浴渗氮,并通过XRD、SEM、OM和显微硬度仪研究了C110钢渗氮层的显微组织及渗氮温度对耐冲蚀性能的影响。结果表明:C110钢的渗氮层厚度随渗氮温度的升高而增加。渗氮温度... 为了提高C110钢的耐腐蚀和耐冲刷性能,对C110钢在430~640℃下进行盐浴渗氮,并通过XRD、SEM、OM和显微硬度仪研究了C110钢渗氮层的显微组织及渗氮温度对耐冲蚀性能的影响。结果表明:C110钢的渗氮层厚度随渗氮温度的升高而增加。渗氮温度为430℃时,渗氮层为Fe3N相和少量Fe4N相,580℃渗氮时,渗层出现少量Fe3O4相的疏松层,640℃渗氮时渗层厚度进一步增厚并存在较厚的疏松层。盐浴渗氮后试样的表面显微硬度提高2~3倍,耐冲蚀性能得到很好的改善,在430℃渗氮4 h的样品耐冲刷腐蚀性最好,质量损失不足未渗氮样的十分之一,随着渗氮温度的上升,耐冲刷性能逐渐降低。 展开更多
关键词 c110 盐浴渗氮 温度 冲刷腐蚀性能
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CO2渗入对C110管柱在甲酸盐完井液中腐蚀行为的影响 被引量:3
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作者 李渭亮 张慧娟 +3 位作者 杜春朝 陈东波 张雷 路民旭 《材料保护》 CAS CSCD 北大核心 2018年第10期47-49,共3页
为探究C110在含CO2的甲酸盐完井液中的腐蚀行为,明确腐蚀机理,采用高温高压反应釜试验,并结合x射线衍射仪(XRD)、扫描电镜(SEM)等表征技术,研究了80oC环境下CO2渗入对Cll0材质管柱在甲酸盐完井液中的腐蚀和开裂敏感性的影响。... 为探究C110在含CO2的甲酸盐完井液中的腐蚀行为,明确腐蚀机理,采用高温高压反应釜试验,并结合x射线衍射仪(XRD)、扫描电镜(SEM)等表征技术,研究了80oC环境下CO2渗入对Cll0材质管柱在甲酸盐完井液中的腐蚀和开裂敏感性的影响。结果表明:3MPaCO2渗入导致Cll0在甲酸盐完井液中的腐蚀敏感性增加,且存在局部腐蚀风险,局部腐蚀速率达到0.97mm/a;Cll0在有无c02渗入的甲酸盐完井液中,均无明显应力腐蚀开裂风险;Cll0在甲酸盐完井液+3MPaC02体系中的腐蚀产物主要为FeC03和Fe304,表明碳钢在该体系中发生C02腐蚀。 展开更多
关键词 CllO碳钢 甲酸钾完井液 C02 腐蚀
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含H_2S油气井用C110钢级套管标准化最新进展 被引量:3
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作者 许晓锋 李为卫 +3 位作者 赵晓姣 徐婷 方伟 葛明君 《钢管》 CAS 2011年第3期62-65,共4页
为满足含H2S深井和高温高压油气井勘探开发的需要而开发的C110钢级套管产品,由于缺乏统一、权威的标准,制约了其发展。ISO/API相关委员会通过近8年的工作,制定了C110钢级套管标准草案。对C110钢级套管标准化的最新进展进行了跟踪研究,... 为满足含H2S深井和高温高压油气井勘探开发的需要而开发的C110钢级套管产品,由于缺乏统一、权威的标准,制约了其发展。ISO/API相关委员会通过近8年的工作,制定了C110钢级套管标准草案。对C110钢级套管标准化的最新进展进行了跟踪研究,介绍了该标准草案中技术要求方面的主要内容。 展开更多
关键词 套管 c110钢级 标准化 H2S 材料
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