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Hot-rolled magnetic yoke steel with yield strength not less than 800Mpa and production method thereof

A technology with a yield strength of 800mpa, applied in the field of hot-rolled yoke steel and its production, can solve the problems of low yield strength of steel plates, improve yield strength and tensile strength, expand hot processing temperature range, and refine grain size Effect

Inactive Publication Date: 2013-12-18
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantage is that the yield strength of the steel plate is low, only 490MPa level

Method used

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  • Hot-rolled magnetic yoke steel with yield strength not less than 800Mpa and production method thereof
  • Hot-rolled magnetic yoke steel with yield strength not less than 800Mpa and production method thereof

Examples

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Embodiment Construction

[0030] The present invention is described in detail below:

[0031] Table 1 is the value list of each embodiment of the present invention and comparative examples;

[0032] Table 2 is a list of main process parameters and performance testing conditions of each embodiment of the present invention and comparative examples.

[0033] Each embodiment of the present invention is produced according to the following steps:

[0034] Its steps:

[0035] 1) Smelting and continuous casting into billets;

[0036] 2) Heating the continuous casting slab to 1280-1350°C;

[0037] 3) Carry out rough rolling, and control the end temperature of rough rolling to not be lower than 1100°C;

[0038] 4) Carry out finish rolling, and control the finish rolling temperature at 850-930°C;

[0039] 5) Perform laminar cooling to 640-700°C;

[0040] 6) Conventionally coiled and ready for use.

[0041] Table 1 The chemical composition (wt%) of the steels of each embodiment of the present invention and ...

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Abstract

The invention relates to hot-rolled magnetic yoke steel with yield strength not less than 800Mpa. The hot-rolled magnetic yoke steel comprises the following components in percentage by weight: 0.03-0.15% of C, not more than 0.15% of Si, 1.20-2.00% of Mn, not more than 0.015% of P, not more than 0.005% of S, 0.08-0.18% of Ti, 0.04-0.08% of Nb, 0.10-0.50% of Mo, 0.02-0.10% of Als and not more than 0.006% of N. The production steps are as follows: smelting and performing continuous casting to form a blank; heating the continuous cast blank; performing rough rolling; performing finish rolling; performing laminar flow cooling; performing conventional winding for later use. As the yield strength is not less than 800MPa, the tensile strength is not less than 850MPa, the elongation rate A is not less than 11%, the magnetic induction performance B50 is not less than 1.50T, the hot-rolled magnetic yoke steel can meet the requirements of high-strength and high-magnetic induction performance steel for rotor magnetic yokes of high-unit capacity ultra-large hydrogenerators.

Description

technical field [0001] The invention relates to steel for a generator rotor and a production method thereof, in particular to hot-rolled yoke steel with yield strength ≥ 800 MPa and a production 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. With the implementation of the "Western Development" strategy and the "West-to-East Power Transmission" strategy determined by the Party Central Committee and the State Council, and in accordance with the National Development and Reform Commission's "vigorously develop hydropower" guidelines, a large number of large and giant hydropower projects at the Three Gorges level will be launched. In the next few decades, the constr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/14C21D8/12
Inventor 宋畅郭斌刘昌明马玉喜陶军晖徐进桥欧阳珉路胡敏高智平王孟
Owner 武钢集团有限公司
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