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发明公开
CN104651741A 一种高强韧160钢级钻杆材料及其制备方法 有权

一种高强韧160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160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：C：0.25%～0.30%，Cr：1.2%～1.5%，Ni：0.5%～1.0%，Mn：0.5%～1.0%，Mo：1.0%～1.4%，Si：0.2%～0.3%，Ce：0.5%～0.7%，Nb:0.03%～0.06%，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：≤0.006%，P：≤0.008%，Al：≤0.06%。一种高强韧160钢级钻杆材料，所述材料的化学成分及质量百分比含量为：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160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 present invention discloses a high strength and toughness 160 steel grade drill rod material, and belongs to the field of drill rod materials, wherein the chemical components of the material comprise, by mass, 0.25-0.30% of C, 1.2-1.5% of Cr, 0.5-1.0% of Ni, 0.5-1.0% of Mn, 1.0-1.4% of Mo, 0.2-0.3% of Si, 0.5-0.7% of Ce, 0.03-0.06% of Nb, 0.01-0.08% of V, and the balance of Fe and unavoidable impurities, wherein the S mass content in the unavoidable impurities is less than or equal to 0.006%, the P mass content in the unavoidable impurities is less than or equal to 0.008%, and the Al mass content in the unavoidable impurities is less than or equal to 0.06%. According to the present invention, the rare earth element Ce is added while the contents of other components are controlled, such that the fatigue resistance of the high strength and toughness 160 steel grade drill rod material is increased and the fatigue life is prolonged on the base of meeting of all API standard mechanical properties so as to be suitable for the increasingly severe equipment service work condition.

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