High-strength high-precision hot rolling steel plate for hydro-generator magnet yoke and production method
A technology of hydroelectric generator and hot-rolled steel plate, which is applied in the direction of magnetic circuit characterized by magnetic materials, can solve the problems of large unevenness of the plate shape and the inability to meet the laser cutting method, and achieve the expansion of the thermal processing temperature area, Make up for the lack of edge strength and refine the grain size
Active Publication Date: 2017-03-22
武汉钢铁有限公司
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Problems solved by technology
[0007] It can be seen from the above documents that the unevenness of the plate shape is large, which cannot meet the requirements of the laser cutting method.
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[0034] The present invention is described in detail below:
[0035] Table 1 is the component value list of each embodiment of the present invention and comparative example;
[0036] Table 2 is a list of main process parameters and performance tests of each embodiment of the present invention and comparative examples.
[0037] Each embodiment of the present invention is produced according to the following steps:
[0038] 1) Heating the slab after smelting and pouring into a slab: the heating temperature is controlled at 1300-1350°C, and kept at this temperature for 1-3 hours;
[0039] 2) Rough rolling: control the end temperature of rough rolling at 1000-1050°C, and the cumulative reduction rate at 65%-70%;
[0040] 3) Carry out finish rolling, and control the finishing rolling temperature at 850-900°C, and then air-cool to the coiling temperature;
[0041] 4) Carry out coiling, and control the coiling temperature at 700-750°C;
[0042] 5) Perform the first annealing after ...
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Abstract
The invention discloses a high-strength high-precision hot rolling steel plate for a hydro-generator magnet yoke. The steel plate comprises chemical components including, by weight percent, 0.15% to 0.25% of C, not larger than 0.15% of Si, 1.80% to 2.10% of Mn, not larger than 0.02% of P, not larger than 0.01% of S, 0.20% to 0.25% of Ti, 0.02% to 0.07% of Nb, 0.05% to 0.10% of V, 0.35% to 0.55% of Mo, not larger than 0.010% of N and 0.02% to 0.10% of Al. The production method comprises the steps of blank forming through smelting and casting, blank heating, rough rolling, fine rolling, reeling, first-time annealing after leveling, first-time straightening, second-time annealing, second-time straightening, packaging and cargo delivery. According to the steel plate, the yield strength is larger than or equal to 900 MPa, the magnetic induction performance B50 is larger than or equal to 1.5T, the unevenness is smaller than or equal to 1mm / m, and the requirement of a high-unit-capacity super-large hydro-generator rotor magnet yoke for steel can be met.
Description
technical field [0001] The invention relates to steel for a hydraulic generator yoke and a production method thereof, in particular to a high-strength and high-precision hot-rolled steel plate for a hydraulic generator magnetic yoke and a production method thereof. Background technique [0002] As a clean, non-polluting and renewable resource, hydropower is of great significance to the construction of an environment-friendly society in my country. With the development of generator manufacturing technology, the processing of rotor yoke pieces has changed from stamping to laser cutting. However, laser cutting has stricter requirements on the shape of the steel plate, generally requiring unevenness ≤ 3mm / m, because once the steel plate is deformed during the laser cutting process, the cutting size of the steel plate will exceed the deviation requirement and lead to waste plates, and the laser cutting will be damaged if it is serious device, resulting in huge losses. In additi...
Claims
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IPC IPC(8): C22C38/04C22C38/02C22C38/14C22C38/12C22C38/06C21D8/02C21D6/00H02K1/02
CPCC21D6/005C21D8/0226C21D8/0247C22C38/001C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14H02K1/02
Inventor 宋畅冯佳高智平甄瑞斌陶军晖习天辉刘昌明陈吉清陆在学徐进桥
Owner 武汉钢铁有限公司