Super high strength magnet yoke steel and manufacturing method thereof

Abstract

The invention discloses super high strength magnet yoke steel. The super high strength magnet yoke steel comprises, by weight percentage, 0.10-0.15% of C, smaller than or equal to 0.15% of Si, 1.85-2.00% of Mn, smaller than or equal to 0.015% of P, smaller than or equal to 0.010% of S, 0.20-0.30% of Ti, 0.05-0.07% of Nb, 0.35-0.55% of Mo, 0.001-0.003% of B, 0.02-0.10% of Als, smaller than or equalto 0.010% of N and the balance Fe and inevitable impurities. According to the super high strength magnet yoke steel, in order to further improve strength and effectively break through the extreme strength 700 MPa of steel of a ferritic structure, in a structure reinforcing manner, by adding a proper amount of bainite to form elements, in cooperation with a super fast cooling process, a bainite structure is obtained, and the super high strength magnet yoke steel is obtained.

Description

technical field [0001] The invention relates to the field of micro-alloyed steel manufacturing, in particular to an ultra-high-strength magnetic yoke steel and a manufacturing method thereof. Background technique [0002] China's hydropower and coal energy reserves are roughly at the same level, and hydropower resources are clean, non-polluting, and renewable resources. Therefore, the development of hydropower construction has great practical significance for alleviating my country's power shortage and achieving sustainable development. According to my country's hydropower development plan, the future development potential in the Tibet region is huge, and according to the unique topography of the Tibet region, the hydropower stations built are all high-head hydropower stations, so the yield strength of the steel used for the rotor yoke part of the hydroelectric generator is required Further increase to more than 900MPa, but also requires good magnetic properties. [0003] Be...

AI Technical Summary

Problems solved by technology

[0004] The patent application number is 201610867421.3 The invention patent records "a CSP process to produce 1000MPa grade hot-rolled martensitic steel and its production method", its tensile strength can reach more than 1000MPa, but its yield strength is only about 800MPa, its strength is low At 900MPa, and does not have the magnetic properties required by the yoke steel

[0005] None of the above invention patents can meet the requirements of high strength and good magnetic properties of high head hydropower generators, so research and development are urgently needed

Images