本发明提供了一种高强度高韧性耐腐蚀马氏体不锈钢油井管,该油井管的成分为：以质量％为基准,C≤0.03,Mn:0.20～1.50,Cr:9.0～12.5,Ni:0.5#3.0,Mo:0.1～1.0,V:0.01～0.2,Nb:0.01～0.08,W:0.01～0.5,Al:0.005#0.060,P≤0.02,S≤0.005,余量为Fe和其它不可避免的杂质。同时提供一种高强度高韧性耐腐蚀马氏体不锈钢油井管制造方法。本发明的效果是可获得一种屈服强度Rp0.2可达862MPa,且韧脆转变温度在#80℃以下的马氏体不锈钢油井管。该不锈钢油井管同时还具有良好的高温抗CO2和Cl#离子腐蚀性能,且成本相对较低,可广泛应用于含CO2腐蚀性气体油气田的开采。

The present invention provides a high-strength, high-toughness, corrosion-resistant martensitic stainless steel oil well pipe. The composition of the oil well pipe is: based on mass %, C≤0.03, Mn: 0.20 to 1.50, Cr: 9.0 to 12.5, Ni: 0.5#3.0,Mo:0.1～1.0,V:0.01～0.2,Nb:0.01～0.08,W:0.01～0.5,Al:0.005#0.060,P≤0.02,S≤0.005, the balance is Fe and other inevitable 的impurities. At the same time, a method for manufacturing high-strength, high-toughness, corrosion-resistant martensitic stainless steel oil well pipes is provided. The effect of the invention is to obtain a martensitic stainless steel oil well pipe with a yield strength Rp0.2 up to 862MPa and a ductile-brittle transition temperature below #80°C. The stainless steel oil well pipe also has good high temperature resistance to CO2 and Cl# ion corrosion, and the cost is relatively low, and it can be widely used in the exploitation of CO2 corrosive gas oil and gas fields.