Steel for sucker rod, and making method of sucker rod

• Main Authors: WU YONGZHENG, JIA BO, PAN HONGGUO, LIU LIN, XIE HAIWEI, MA GUANGHE, HE GUOWEI
• Format: Patent
• Language: Chinese; English
• Published: 30.03.2016
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a steel for a sucker rod, and a making method of the sucker rod, and belongs to the field of petroleum exploitation apparatuses. The steel for the sucker rod comprises carbon, silicon, manganese, chromium, molybdenum, aluminum, copper, phosphorus, sulfur, nickel and iron. The making method comprises the following steps: machine-shaping the steel for the sucker rod, forging the steel, quenching and tempering the forged steel, carrying out heat straightening to obtain a sucker rod blank, carrying out shot blasting treatment on the surface of the sucker rod, and processing a screw thread on the surface of the sucker rod blank to make the sucker rod. Proper amounts of elements are added to iron in the steel for the sucker rod, so the corrosion resistance and the strength of the sucker rod are improved, especially the corrosion resistance to hydrogen sulfide and chloride ions is improved, thereby the life of the sucker rod is prolonged, and the petroleum exploitation cost is reduced. The ma