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发明公开
CN106119708A 一种95Ksi钢级抗硫化氢应力腐蚀的油井管用低合金钢 无效 - 驳回

一种95Ksi钢级抗硫化氢应力腐蚀的油井管用低合金钢
摘要：
本发明公开了一种95Ksi钢级抗硫化氢应力腐蚀的油井管用低合金钢，所述低合金钢按照质量百分数的组成成分为：0.16‑0.28％C、0.15‑0.33％Si、0.4‑0.7％Mn、0.001‑0.013％P、0.0001‑0.004％S、0.8‑1.2％Cr、0.4‑0.6％Mo、0.02‑0.08％V、0.0003‑0.0025％B、0.002‑0.012％N、0‑0.05％Zr、0‑0.4％Ni、0‑0.2％Cu、0‑0.01％La、0‑0.003％O、0‑0.00015％H，其余为Fe和不可避免杂质；本发明的合金钢经过调质处理后，具有优良的理化性能，其抗硫化氢应力腐蚀门槛值达到90％YSmin，平均晶粒度11级，高于API要求，适合用于含有硫化氢环境的油井。
摘要（英）：

The invention discloses a 95Ksi steel-grade hydrogen sulfide stress corrosion resistance low-alloy steel for an oil well pipe. The low-alloy steel comprises, by mass, 0.16-0.28% of C, 0.15-0.33% of Si, 0.4-0.7% of Mn, 0.001-0.013% of P, 0.0001-0.004% of S, 0.8-1.2% of Cr, 0.4-0.6% of Mo, 0.02-0.08% of V, 0.0003-0.0025% of B, 0.002-0.012% of N, 0-0.05% of Zr, 0-0.04% of Ni, 0-0.2% of Cu, 0-0.01% of La, 0-0.003% of O, 0-0.00015% of H, and the balance Fe and inevitable impurities. The alloy steel has the good physical and chemical properties after being subjected to quenching and tempering, the hydrogen sulfide stress corrosion resistance threshold value achieves 90%YSmin, the average grain size is 11 grade and higher than the API requirement, and the low-alloy steel is suitable for being used for an oil well in a hydrogen sulfide environment.

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