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Preparation method of valve steel material

A technology for valve steel and raw materials, applied in the field of valve steel materials and their preparation, can solve the problems of insecurity and high processing costs, and achieve the effects of low cost, simple preparation process and good mechanical properties

Inactive Publication Date: 2013-01-30
ANHUI RONGDA VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main components of fission reactor valve materials widely used at present contain elements such as Fe, Mn, Ni, Mo, etc. Among them, Ni, M0, etc. will produce long-lived radionuclides after being irradiated by neutrons, and the half-life of some radionuclides can be as long as Tens of thousands or even hundreds of thousands of years, this poses a severe challenge to the nuclear waste disposal of nuclear power plants. Not only is the disposal cost very high, but it is also extremely unsafe and unsuitable for fusion reactors

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1: valve steel material, the weight parts of the raw materials are: the matrix is ​​Fe element, Cr 7.5%, W 1.3%, Ta 0.55%, Mn 0.35%, Al 0.05%, P 0.35%, S 0.05%, C 0.05%, control requires Pb 0.008-0.013%, Cu 0.001-0.003%, Si 0.001-0.003%, Nb 0.0006-0.0012% and Ni 0.003-0.008%.

[0015] The preparation method of valve steel material includes the following steps:

[0016] (1) Use FeCa alloy to carry out de-S treatment on pure Fe, and carry out high-temperature vacuum dehydration and degassing treatment for Cr, W, Ta, Mn and Al before smelting;

[0017] (2) According to the weight of the raw materials of the valve steel material, pure Fe is added to the vacuum induction furnace, and then Cr, W, S, P, Ta, and Al raw materials are added in turn, and then argon gas is injected as a protective gas to control the pressure. 0.005-0.07Mpa, heat up to 1400-1600℃, then add C and Mn;

[0018] (3) The smelted valve steel material is taken out, and the finished product is obt...

Embodiment 2

[0020] Example 2: valve steel material, the weight parts of the raw materials are: the matrix is ​​Fe element, Cr 8.8%, W 1.6%, Ta 0.70%, Mn 0.45%, Al 0.08%, P 0.55%, S 0.10%, C 0.10%, control requires Pb 0.008-0.013%, Cu 0.001-0.003%, Si 0.001-0.003%, Nb 0.0006-0.0012% and Ni 0.003-0.008%.

[0021] The preparation method of valve steel material includes the following steps:

[0022] (1) Use FeCa alloy to carry out de-S treatment on pure Fe, and carry out high-temperature vacuum dehydration and degassing treatment for Cr, W, Ta, Mn and Al before smelting;

[0023] (2) According to the weight of the raw materials of the valve steel material, pure Fe is added to the vacuum induction furnace, and then Cr, W, S, P, Ta, and Al raw materials are added in turn, and then argon gas is injected as a protective gas to control the pressure. 0.005-0.07Mpa, heat up to 1400-1600℃, then add C and Mn;

[0024] (3) The smelted valve steel material is taken out, and the finished product is obt...

Embodiment 3

[0026] Embodiment 3: valve steel material, the weight parts of the raw materials are: the matrix is ​​Fe element, Cr 10.5%, W 2.0%, Ta 0.85%, Mn 0.55%, Al 0.10%, P 0.85%, S 0.15%, C 0.15%, control requires Pb 0.008-0.013%, Cu 0.001-0.003%, Si 0.001-0.003%, Nb 0.0006-0.0012% and Ni 0.003-0.008%.

[0027] The preparation method of valve steel material includes the following steps:

[0028] (1) Use FeCa alloy to carry out de-S treatment on pure Fe, and carry out high-temperature vacuum dehydration and degassing treatment for Cr, W, Ta, Mn and Al before smelting;

[0029] (2) According to the weight of the raw materials of the valve steel material, pure Fe is added to the vacuum induction furnace, and then Cr, W, S, P, Ta, and Al raw materials are added in turn, and then argon gas is injected as a protective gas to control the pressure. 0.005-0.07Mpa, heat up to 1400-1600℃, then add C and Mn;

[0030] (3) The smelted valve steel material is taken out, and the finished product is...

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PUM

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Abstract

The invention discloses a valve steel material and a preparation method thereof. The valve steel material is prepared by mixing a Fe element serving as a base body, Cr, W, Ta, Mn, Al, P, S and C according to a certain weight part, and then smelting, thermally treating and vacuum-pouring the mixture. The preparation process is simple, the components are stable and the cost is low; furthermore, various alloy elements are added into the raw material, so the valve steel material has the characteristics of high mechanical property, high temperature resistance, radiation resistance and the like and can be applied to fusion reactors.

Description

technical field [0001] The invention relates to a valve steel material and a preparation method thereof, belonging to the technical field of metal material processing. Background technique [0002] Fusion energy is a kind of clean nuclear energy, and the valve materials used in it are required to be low-activation materials. The main components of the currently widely used fission reactor valve materials contain elements such as Fe, Mn, Ni, Mo, etc. Among them, Ni, M0, etc. will produce long-lived radionuclides after being irradiated by neutrons, and some radionuclides have a half-life of as long as For tens of thousands or even hundreds of thousands of years, this poses a serious challenge to the nuclear waste disposal of nuclear power plants. Not only is the disposal cost very high, but it is also extremely unsafe and not suitable for fusion reactors. Therefore, in order to minimize the potential radioactive hazard caused by material activation and reduce the reprocessing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/60
Inventor 胡光荣
Owner ANHUI RONGDA VALVE