Hot-rolled magnetic yoke steel and manufacture method thereof
A manufacturing method and a yoke steel technology are applied in the field of hot-rolled yoke steel and its manufacturing, and can solve the problems of low yield strength of the yoke steel and the like
Active Publication Date: 2019-04-05
BAOSHAN IRON & STEEL CO LTD
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- Description
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- Application Information
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Problems solved by technology
However, the yield strength of the hot-rolled high-strength yoke steel disclosed in this patent document is low, only 700MPa level, and the magnetic induction performance is B 50 ≥1.5T
Method used
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Examples
Experimental program
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Effect test
Embodiment 1-5
[0050] Table 1 lists the mass percentage of each chemical element in the hot-rolled yoke steel of Examples 1-5.
[0051] Table 1. (wt%, the balance is Fe and other unavoidable impurity elements except P and S)
[0052]
[0053] The manufacturing method of the hot-rolled yoke steel of Examples 1-5 includes the following steps:
[0054] (1) Smelting, refining and casting in accordance with the chemical element components listed in Table 1;
[0055] (2) Reheating: heating temperature≥1230℃, holding time≥1h;
[0056] (3) Hot rolling: Control the end temperature of rough rolling to be 1000~1100℃, multi-pass high reduction rolling above 1050℃ and cumulative deformation ≥50%, then the intermediate billet will be warmed to Then carry out multi-pass rolling and the cumulative deformation of this multi-pass rolling is ≥70%; the final rolling temperature is controlled at between;
[0057] (4) Laminar cooling;
[0058] (5) Coiling: Coiling temperature Then slowly cool to room temperature.
[0059] ...
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Abstract
The invention discloses hot-rolled magnetic yoke steel. The chemical elements of the hot-rolled magnetic yoke steel comprise, by mass, 0.06%-0.18% of C, larger than 0% and smaller than or equal to 0.50% of Si, 1.50%-2.20% of Mn, 0.10%-0.25% of Ti, 0.10%-0.50% of Mo, 0.05%-0.22% of V, larger than or equal to 0.05% and smaller than or equal to 0.30% of Cu, larger than or equal to 0.05% and smaller than or equal to 0.30% of Ni, 0.015%-0.10% of Al, smaller than or equal to 0.010% of N, the balance Fe and other unavoidable impurities. In addition, the invention discloses a manufacture method of thehot-rolled magnetic yoke steel. The manufacture method comprises the steps of (1) smelting, refining and casting; (2) reheating, specifically, the heating temperature is higher than or equal to 1,230DEG C, and the heat preservation time is longer than or equal to 1 h; (3) hot rolling; (4) laminar cooling; and (5) rolling, specifically, the rolling temperature ranges from 520 DEG C to 620 DEG C,and then the temperature is lowered to the room temperature through slow cooling. The hot-rolled magnetic yoke steel is high in strength, good in tenacity and excellent in magnetic induction performance.
Description
Technical field [0001] The present invention relates to a yoke steel and a manufacturing method thereof, in particular to a hot-rolled yoke steel and a manufacturing method thereof. Background technique [0002] Hydropower resources are a kind of renewable clean energy, and it is of great significance to vigorously develop hydropower development. However, these large-scale hydropower projects all require large-scale hydro-generator units with a single-unit capacity of one million kilowatts, which puts more stringent requirements on the overall performance of the steel used in the rotor yoke of the hydro-generator. [0003] Currently, existing patent documents disclose hot-rolled high-strength yoke steel and its manufacturing method. For example: the publication number is CN101016600, the publication date is August 15, 2007, and the Chinese patent document entitled "C-Mn-Ti-Nb hot-rolled high-strength and high-magnetic induction steel and its manufacturing method" discloses a C-Mn...
Claims
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IPC IPC(8): C22C38/04C22C38/02C22C38/14C22C38/12C22C38/16C22C38/08C22C38/06C21D8/12
CPCC21D8/1222C21D2211/002C21D2211/004C21D2211/005C22C38/02C22C38/04C22C38/06C22C38/08C22C38/12C22C38/14C22C38/16
Inventor 胡晓萍张晨陆敏王焕荣王巍杨征华骏山
Owner BAOSHAN IRON & STEEL CO LTD