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Method for producing nitrogen controlling low activity ferrite martensite steel for fusion reactor

A low-activity ferritic and martensitic steel technology is applied in the field of manufacturing nitrogen-controlled low-activity ferritic-martensitic steel for fusion reactors, and can solve problems such as low-activity characteristic requirements of fusion reactor materials

Active Publication Date: 2012-07-04
SOUTHWESTERN INST OF PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the alloy materials in the prior art cannot meet the requirements of low activity characteristics of fusion reactor materials at the same time

Method used

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  • Method for producing nitrogen controlling low activity ferrite martensite steel for fusion reactor
  • Method for producing nitrogen controlling low activity ferrite martensite steel for fusion reactor
  • Method for producing nitrogen controlling low activity ferrite martensite steel for fusion reactor

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Experimental program
Comparison scheme
Effect test

preparation example Construction

[0059] The method for preparing iron-tungsten alloy described in this step can be prepared by referring to any existing method. This step is the only step in which metal tungsten is added in the whole method, and metal iron can also be added in subsequent steps, so in this step As long as the mass percentage of tungsten is controlled not to exceed 20% of the iron-tungsten master alloy. The total amount of metal tungsten added is controlled at 1.45%-1.6% (mass percentage) of the nitrogen-controlling low-activity ferritic martensitic steel for fusion reactors.

[0060] The melting point of the iron-tungsten master alloy prepared in this step is lower than 1600° C., which is beneficial to the melting of tungsten in the subsequent smelting step.

[0061] Step 2: Proportionate ingredients according to the chemical composition of the alloy, chromium, manganese, vanadium, carbon, tantalum, etc. are all selected from high-purity materials. The primary melting of the alloy is carried ...

Embodiment 1

[0078] Embodiment 1: the method for manufacturing the nitrogen-controlling low-activity ferrite / martensitic steel of the ratio listed in the aforementioned experiment 2

[0079] First, the iron-tungsten master alloy is prepared by vacuum induction melting, and the mass percentage of tungsten is 10.6%. The alloy composition is 8.5% Cr, 1.55% W, 0.24% V, 0.10% C, 0.10% Ta, 0.5% Mn, 0.03% N, and the balance is iron (mass percentage). According to the alloy design composition distribution, considering the burning loss rate of different alloy elements, the preparation of each raw material should have different allowances, and the allowances are calculated according to the aforementioned percentages. Add the prepared pure iron, iron-tungsten master alloy, pure vanadium, pure chromium and pure carbon into the vacuum induction melting furnace. Turn on the furnace to vacuumize, when the vacuum degree reaches within 5Pa, start power transmission, heat up to 1500-1550°C, the raw materia...

Embodiment 2

[0080] Embodiment 2: the method for manufacturing the nitrogen-controlling low-activity ferrite / martensitic steel of the ratio listed in the aforementioned experiment 3

[0081] First, the iron-tungsten master alloy is prepared by vacuum induction melting, and the mass percentage of tungsten is 10.5%. The alloy composition is 8.3% Cr, 1.6% W, 0.27% V, 0.11% C, 0.09% Ta, 0.45% Mn, 0.035% N, and the balance is iron (mass percentage). According to the alloy design composition distribution, considering the burning loss rate of different alloy elements, the preparation of each raw material should have different allowances, and the allowances are calculated according to the aforementioned percentages. Add the prepared pure iron, iron-tungsten master alloy, pure vanadium, pure chromium and pure carbon into the vacuum induction melting furnace. Turn on the furnace to vacuumize, when the vacuum degree reaches within 5Pa, start power transmission, heat up to 1500-1550°C, the raw materi...

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Abstract

The invention belongs to preparation methods for martensite steel, particularly relates to a preparation method for low activity ferrite / martensite steel for a fusion reactor, which includes the following steps: step 1 ferrum-wolframium (Fe-W) master alloy is prepared, and mass percentage of W in the Fe-W master alloy is smaller than or equal to 20%; step 2 ingredients are added according to preset proportion and comprise chromium, manganese, vanadium, carbon and tantalum, first smelting of alloy is conducted by adopting a vacuum induction smelting method, and the ingredients all adopt high-purity materials; step 3 vacuum self-consuming remelting is conducted; and step 4 hot working is conducted. The method has the advantages that the low activity ferrite / martensite steel prepared through the method meets requirements in aspects of tensile strength, yield strength and elongation coefficient and simultaneously meets a requirement of low activity for the fusion reactor.

Description

technical field [0001] The invention belongs to a method for preparing martensitic steel, in particular to a method for manufacturing nitrogen-controlling low-activity ferritic martensitic steel for fusion reactors. Background technique [0002] The Tritium Production Experiment Blanket Module (TBM) is the main content of the research of the member countries of the International Thermonuclear Test Reactor (ITER) International Cooperation Organization. It is planned to be placed in the later stage of ITER operation. The location of the equatorial plane with the highest density to simulate and test materials and technologies related to future fusion power reactors. The structural material used as the first wall of the cladding must have sufficient resistance to neutron radiation damage in the harsh environment of the fusion reactor, and be able to withstand the thermal stress caused by high temperature and temperature changes, and other modules and plasma materials As well as...

Claims

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Application Information

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IPC IPC(8): C22C38/26C22C33/06C21D8/02
Inventor 王平怀谌继明许增裕
Owner SOUTHWESTERN INST OF PHYSICS
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