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A control method for yield strength of 1Mn18Cr18N steel retaining ring forgings

A technology of 1mn18cr18n and yield strength, which is applied in the field of yield strength control in the manufacturing process of 1Mn18Cr18N steel retaining ring forgings, can solve the problems of reducing production costs and high production costs, and achieve the effects of reducing manufacturing costs, improving production efficiency and avoiding material waste

Active Publication Date: 2014-04-23
DEYANG WANXIN POWER STATION PROD DEV
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiency of higher production cost due to the inability to accurately control the yield strength in the production process of the 1Mn18Cr18N steel retaining ring forging existing in the prior art, and to provide a method for controlling the yield strength of the 1Mn18Cr18N steel retaining ring forging, It can realize one-time production of 1Mn18Cr18N steel retaining ring forgings whose yield strength meets the requirements of use, reducing production costs

Method used

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Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with test examples and specific embodiments. However, it should not be understood that the scope of the above subject matter of the present invention is limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0020] After research, it is found that the yield strength of the retaining ring forging (commonly represented by Rp0.2) is related to the degree of deformation of the steel retaining ring forging blank in the cold deformation strengthening process. The degree of deformation is different, and the yield strength of the produced retaining ring forging is different. The yield strength (Rp0.2) of 1Mn18Cr18N steel increases with the increase of deformation degree, but the increase degree of yield strength is different in different deformation degree ranges. According to the relationship b...

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Abstract

The present invention discloses a control method for yield strength of 1Mn18Cr18N steel retaining ring forgings. The method comprises (1) detecting percentage contents of Mn, Cr, and N in 1Mn18Cr18N steel retaining ring forging blank; (2) according to the percentage contents of Mn, Cr, and N in 1Mn18Cr18N steel retaining ring forging blank, determining an initial yield strength value A0 of the 1Mn18Cr18N steel retaining ring forging blank; and (3) in a cold deformation strengthening step, performing a plurality times of deformation and polish to the 1Mn18Cr18N steel retaining ring forging blank to make the total deformation degree epsilon of the Epsilon to meet requirements. By using the method of the present invention to control the yield strength of the retaining ring forgings, 1Mn18Cr18N steel retaining ring forgings with yield strength meeting production requirements can be manufactured at one time, thereby greatly reducing the production costs of 1Mn18Cr18N steel retaining ring forgings.

Description

technical field [0001] The invention relates to the field of manufacturing 1Mn18Cr18N steel retaining ring forgings, in particular to a yield strength control method in the manufacturing process of 1Mn18Cr18N steel retaining ring forgings. Background technique [0002] The guard ring is one of the most important parts in thermal power and nuclear power units. It is assembled on the coil windings at both ends of the rotor of the generator set. Turn part. 1Mn18Cr18N steel has become the manufacturing material of the new generation of retaining ring forgings because of its high resistance to crack growth and stress corrosion resistance. The generator set requires that the retaining ring must have good strength performance, so the strength index is the most important performance index in the mechanical performance acceptance test item of the forging retaining ring. If the strength of the forging retaining ring produced cannot meet the requirements for use, it can only be scrapp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D7/02C21D11/00
Inventor 鲜勇丁宇
Owner DEYANG WANXIN POWER STATION PROD DEV
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