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发明公开
CN104651740A 一种高强韧150钢级钻杆材料及其制备方法 无效 - 驳回

一种高强韧150钢级钻杆材料及其制备方法
摘要：
本发明公开了一种高强韧150钢级钻杆材料，属于钻杆材料领域。所述材料的化学成分及质量百分比含量为：一种高强韧150钢级钻杆材料，所述材料的化学成分及质量百分比含量为：C:0.23%～0.30%，Cr:0.5%～1.5%，Ni:0.6%～1.0%，Mn:0.9%～1.5%，Mo:0.8%～1.4%，Si:0.1%～0.5%，Ce:0.6%～1.0%，Nb:0.01～0.08%，V：0.01%～0.08%，余量为Fe和不可避免的杂质，所述不可避免的杂质中，S、P、Al的质量百分比为：S：≤0.008%，P：≤0.08%，Al：≤0.07%。本发明通过添加稀土元素Ce，同时控制材料其他成分的含量，使高强韧150钢级钻杆材料在满足所有API标准的力学性能的基础上，抗疲劳性能得到提高，疲劳寿命得到延长，更加适合日益严酷的设备服役工况。
摘要（英）：

The invention discloses a high-strength and -toughness 150 steel-grade drill pipe material and belongs to the field of drill pipe materials. The high-strength and -toughness 150 steel-grade drill pipe material includes following chemical components, by mass: 0.23-0.30% of carbon, 0.5-1.5% of chromium, 0.6-1.0% of nickel, 0.9-1.5% of manganese, 0.8-1.4% of molybdenum, 0.1-0.5% of silicon, 0.6-1.0% of cerium, 0.01-0.08% of niobium, 0.01-0.08% of vanadium, and the balanced iron and unavoidable impurities, which include sulfur, phosphorus and aluminum, wherein the mass percentage ratio of the sulfur, phosphorus and aluminum are described as follows: S<=0.008%, P<=0.08% and Al<=0.07%. By means of addition of the rare earth element cerium with the contents of other components being controlled at the same time, the high-strength and -toughness 150 steel-grade drill pipe material, on the basis of satisfying mechanical performances of an API standard, is enhanced in fatigue resistance and is prolonged in fatigue life, so that the drill pipe material is more suitable for equipment service working conditions being more and more rigorous.

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