Economic P110 steel-grade oil sleeve and production method thereof
A technology of oil casing and manufacturing method, which is applied in the field of alloy steel manufacturing, can solve the problems of high alloy element content, no obvious advantage in market competitiveness, and high production cost, achieve high economic benefits, improve market competitiveness, and reduce alloy steel The effect of adding elements
Active Publication Date: 2019-03-01
LINZHOU FENGBAO PIPE
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[0002] At present, the steel types used in the production of P110 steel grade oil casing in the oil casing industry are 25MnV, 25CrMnMo, 30CrMo and other alloy steels. The performance of these materials can meet the requirements of API standards, but the content of alloy elements is generally high. High-priced alloy elements such as V are used to improve hardenability and refine grains, the production cost is high, and the market competitiveness has no obvious advantages
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[0017] An economical P110 steel grade oil casing, the chemical composition of which is calculated by mass percentage: C 0.30-0.34%, Si 0.20-0.35%, Mn 1.40-1.60%, P≤0.025%, S≤0.015%, Cr 0.15 -0.30%, Mo≤0.10%, Cu≤0.20%, Al 0.005-0.040%, Ni≤0.20%, the balance is Fe and unavoidable impurities.
[0018] In the API standard, P110 steel grade is a high-strength and high-toughness material, and the martensitic structure after quenching is required to reach more than 90%, so the requirements for the hardenability and grain refinement of the material are relatively high. The existing technology generally refines grains by adding high-cost V elements or adopts the principle of adding high Cr and high Mo elements to improve the hardenability of the material, thereby improving the strength and toughness of the material, but this often leads to higher material costs. In the present invention, by optimizing the reasonable ratio between the elements and adopting the principle of low carbon an...
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Abstract
The invention provides an economic P110 steel-grade oil sleeve and a production method thereof. The oil sleeve is prepared from the following chemical components in percentage by mass: 0.30-0.34% of C, 0.20-0.35% of Si, 1.40-1.60% of Mn, less than or equal to 0.025% of P, less than or equal to 0.015% of S, 0.15-0.30% of Cr, less than or equal to 0.10% of Mo, less than or equal to 0.20% of Cu, 0.005-0.40% of Al, less than or equal to 0.20% of Ni and the balance of Fe and inevitable impurities. According to the economic P110 steel-grade oil sleeve and the production method thereof, by adjustingthe types and the contents of alloy elements, and reasonably adjusting three alloy elements of C, Mn and Cr, a compound enhancing effect is achieved, an expensive alloy element V can be replaced, thesame hardenability and grain refinement action are achieved, and the performance requirements of P110 steel-grade high strength and high toughness are met. By means of the economic P110 steel-grade oil sleeve and the production method thereof, the production cost can be greatly reduced, the reduction extent can reach 20%, the economic P110 steel-grade oil sleeve has high economic benefits, thus having improved market competitiveness; meanwhile, adding of alloy elements is reduced, and the economic P110 steel-grade oil sleeve and the production method thereof are beneficial for environmental protection, and can save energy and improve the efficiency, so that wide application and popularization prospects are realized.
Description
technical field [0001] The invention belongs to the technical field of alloy steel manufacture, and in particular relates to an economical P110 steel grade oil casing and a manufacturing method thereof. Background technique [0002] At present, the steel types used in the production of P110 steel grade oil casing in the oil casing industry are 25MnV, 25CrMnMo, 30CrMo and other alloy steels. The performance of these materials can meet the requirements of API standards, but the content of alloy elements is generally high. High-priced alloying elements such as V are used to improve hardenability and refine grains, the production cost is high, and the market competitiveness does not have obvious advantages. Therefore, it is necessary to develop a more economical and low-cost oil casing of a new steel grade of P110 steel. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides an economical P110 steel grade petroleum ca...
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IPC IPC(8): C22C38/58C22C38/44C22C38/42C22C38/06C22C38/04C22C38/02C22C33/04C21D1/18C21D8/10C21D6/00
CPCC21D1/18C21D6/004C21D6/005C21D6/008C21D8/105C22C33/04C22C38/002C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/58
Inventor 肖永忠曹铜壁向鹏高磊宿敬波
Owner LINZHOU FENGBAO PIPE