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CN109023078A 一种80KSI抗硫化氢应力腐蚀的油井管用合金钢及其制备方法 无效 - 撤回

一种80KSI抗硫化氢应力腐蚀的油井管用合金钢及其制备方法
摘要：
一种80KSI抗硫化氢应力腐蚀的油井管用合金钢，以质量百分数计，包括以下原料：C：0.10％～0.20％、Si：0.15％～0.35％、Mn：0.7％～1.5％、P：0.001％～0.015％、S：0.0001％～0.005％、Cr：4％～6％、Mo：0.5％～0.7％、V+Ti：0.01％～0.08、Al:≤0.01％、Ni：≤0.4％、Cu：≤0.2％，其余为Fe和不可避免杂质。本发明的有益效果是：采用本发明的合金钢调质处理后的性能较佳：抗拉强度≥655MPa，屈服强度552～655MPa，延伸率≥15％，屈强比≤0.92；端面硬度≤HRC22，该钢管0℃的夏比V型缺口纵向全尺寸冲击功≥150J；平均晶粒度9级；采用本发明的合金钢调质处理后具备较高的强度和高的韧性，其抗硫化氢应力腐蚀门槛值达到90％YSmin，高于API要求，可以广泛用于含有硫化氢应力腐蚀的环境中。
摘要（英）：

The invention relates to an 80KSI hydrogen sulfide stress corrosion resistance alloy steel for an oil well pipe. The alloy steel includes the following raw materials including, by mass, 0.10% to 0.20%of C, 0.15% to 0.35% of Si, 0 .7% to 1.5% of Mn, 0.001% to 0.015% of P, 0.0001% to 0.005% of S, 4% to 6% of Cr, 0.5% to 0. 7% of Mo, 0.01% to 0.08% of V+Ti, not larger than 0.01% of Al, not larger than 0.4% of Ni, not larger than 0.2% of Cu and the balance Fe and inevitable impurities. The alloy steel has the beneficial effects that the performance of the alloy steel obtained after quenching andtempering is better, wherein the tensile strength is higher than or equal to 655 MPa, the yield strength is 552-655 MPa, the elongation is larger than or equal to 15%, the yield ratio is smaller thanor equal to 0.92, the end face hardness is smaller than or equal to HRC22, the Charpy V-notch longitudinal full-scale impact energy of the steel pipe at 0 DEG C is larger than or equal to 150 J, and the average grain size is 9 grades; and after quenching and tempering of the alloy steel, the high strength and high toughness are achieved, the hydrogen sulfide stress corrosion threshold reaches 90%YSmin which is higher than the API requirement, and the alloy steel can be widely used in environments containing hydrogen sulfide stress corrosion.

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