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High fatigue strength non-magnetic steel and preparation method thereof

A technology of fatigue strength and non-magnetic steel, which is applied in the field of high fatigue strength, low magnetic permeability, high manganese non-magnetic steel and its preparation, can solve the problems of affecting the service life of devices and low fatigue strength of non-magnetic steel, and achieve easy operation , improved fatigue strength, simple preparation method

Inactive Publication Date: 2019-03-01
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome defects such as low fatigue strength of the non-magnetic steel in the prior art, which affects the service life of the device, thereby providing a high fatigue strength, low magnetic permeability, high manganese non-magnetic steel and its preparation method

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  • High fatigue strength non-magnetic steel and preparation method thereof

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Embodiment 1

[0032] This embodiment provides a high-fatigue strength non-magnetic steel whose mass percentage composition is: C: 0.4%, Si: 0.4%, Mn: 17.5%, Cr: 4%, V: 1.5%, La: 0.1%, P : 0.03%, S: 0.02%, the balance is Fe.

[0033] The preparation method of the above non-magnetic steel includes the following steps:

[0034] Vacuum melting: according to the ratio of each element in the high-strength non-magnetic steel, the raw materials are mixed and put into the vacuum melting furnace, and the vacuum is pumped to 10 -3 Next, fill with argon gas with a purity of 99.99%, and arc smelt into ingots;

[0035] Vacuum casting: After smelting, the ingot is polished and the surface oxide layer is put into a vacuum electromagnetic induction furnace, and the vacuum degree in the furnace cavity is pumped to 10 -4 Below Pa, fill with argon gas with a purity of 99.99%, melt the ingot by high-frequency induction heating, and cast it into a billet;

[0036] Hot-rolling process: After the slab is kept at 1200℃ for...

Embodiment 2

[0039] This embodiment provides a high-fatigue strength non-magnetic steel whose mass percentage composition is: C: 0.4%, Si: 0.4%, Mn: 17.5%, Cr: 4%, V: 1.5%, La: 0.1%, P : 0.04%, S: 0.01%, the balance is Fe.

[0040] The preparation method of the above non-magnetic steel includes the following steps:

[0041] Vacuum melting: according to the ratio of the elements in the high-strength non-magnetic steel, the raw materials are mixed and put into the vacuum melting furnace, and the vacuum is pumped to 10 -3 Next, fill with argon gas with a purity of 99.99%, and arc smelt into ingots;

[0042] Vacuum casting: the ingot after smelting is polished and the surface oxide layer is put into a vacuum electromagnetic induction furnace, and the vacuum degree in the furnace cavity is pumped to 10 -4 Below Pa, fill with argon with a purity of 99.99%, melt the ingot by high-frequency induction heating, and cast it into a billet;

[0043] Hot rolling process: After the cast slab is kept at 1200°C fo...

Embodiment 3

[0047] This embodiment provides a high-fatigue strength non-magnetic steel whose mass percentage composition is: C: 0.48%, Si: 0.4%, Mn: 18.5%, Cr: 4.5%, V: 1.3%, La: 0.15%, P : 0.02%, S: 0.02%, the balance is Fe.

[0048] The preparation method of the above non-magnetic steel includes the following steps:

[0049] Vacuum melting: according to the ratio of the elements in the high-strength non-magnetic steel, the raw materials are mixed and put into the vacuum melting furnace, and the vacuum is pumped to 10 -3 Below, it is filled with argon gas with a purity of 99.99% and arc-smelted into ingots;

[0050] Vacuum casting: the ingot after smelting is polished and the surface oxide layer is put into a vacuum electromagnetic induction furnace, and the vacuum degree in the furnace cavity is pumped to 10 -4 Below Pa, fill with argon gas with a purity of 99.99%, melt the ingot by high-frequency induction heating, and cast it into a billet;

[0051] Hot rolling process: After the cast slab is...

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Abstract

The invention belongs to the technical field of non-magnetic steel preparation, and particularly relates to high manganese non-magnetic steel having high fatigue strength and low magnetic permeabilityand a preparation method thereof. The non-magnetic steel provided by the invention is prepared from the following raw materials in percentage by mass: C: 0.4-0.6%, Si: 0.3-0.5%, Mn: 17-19%, Cr: 3.5.-5.0%, V: 1.2-1.6%, La: 0.05-0.2%, P: less than or equal to 0.04%, S: less than or equal to 0.02%, and the balance of Fe. By means of preferred components and the adjustment of the preparing method, the non-magnetic steel made according to the invention has excellent mechanical properties, especially, the fatigue strength is significantly improved, the magnetic permeability is low, and the production process is simple; the non-magnetic steel made according to the invention is suitable for manufacturing iron core pull rods of transformers and reactors, and the service life of the device is prolonged.

Description

Technical field [0001] The technical field of non-magnetic steel preparation of the present invention specifically relates to a high-fatigue strength, low magnetic permeability, high-manganese non-magnetic steel and a preparation method thereof. Background technique [0002] Non-magnetic steel refers to steel that does not produce magnetic induction in a magnetic field. Its structure is mainly austenite, the relative permeability is slightly greater than 1, and the magnetization is very weak, and magnetic induction is basically not generated. The use of non-magnetic steel is very wide, and it is necessary to use non-magnetic steel in automatic control systems, precision instruments, telecommunications and motors, and in many military fields. [0003] The high-strength tie rod is an important part of the transformer and reactor core compression device, and it is also the main force component that bears the vibration of the core cake under the action of the alternating magnetic field...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/38C22C38/24C21D8/12
CPCC21D8/1222C22C38/002C22C38/005C22C38/02C22C38/24C22C38/38
Inventor 侯东王广克聂京凯金文德孔晓峰刘主光樊超田一刘晓圣何强陈新韩钰
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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