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Preparation method of nano ZrC reinforced FeCrAl alloy

An alloy and nanotechnology, applied in nuclear power generation, climate sustainability, fuel elements, etc., can solve the problem of not being able to reach the cladding of fuel elements, achieve good room temperature mechanical properties, improve neutron economy, and significantly mechanical properties. sexual effect

Pending Publication Date: 2019-05-24
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned problem that among the existing FeCrAl alloy materials, there is no material that can meet the requirements for core structures such as fuel element cladding and grids, the present invention provides a preparation of nano-ZrC reinforced FeCrAl alloy method

Method used

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  • Preparation method of nano ZrC reinforced FeCrAl alloy
  • Preparation method of nano ZrC reinforced FeCrAl alloy
  • Preparation method of nano ZrC reinforced FeCrAl alloy

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Embodiment 1

[0033] Such as Figure 1 to Figure 3 Shown, a kind of nanometer ZrC strengthens the preparation method of FeCrAl alloy, comprises the following steps that carry out in sequence:

[0034] Step 1, weighing and mixing FeCrAl pre-alloyed powder and ZrC powder according to the ratio of 97%-99.8% by weight: 0.2-3%, and the particle size range of ZrC powder is 3-100nm;

[0035] Step 2, using a ball mill, put the mixed powder obtained in step 1 into a ball mill tank for mixing, and mix to obtain a mixed powder with uniform distribution of ZrC particles;

[0036] Step 3, sintering the mixed powder obtained in step 2 to obtain a FeCrAl-based alloy block;

[0037] In step 4, the sintered FeCrAl-based alloy block is subjected to thermal processing, and the target product is obtained after cooling.

[0038] This scheme is used to prepare FeCrAl-based alloys. Through the control of the content of nano-reinforced phases in the alloy, processing technology, and parameters of nano-reinforced p...

Embodiment 2

[0041] This embodiment provides a specific implementation on the basis of Embodiment 1:

[0042] A preparation method of nano-ZrC reinforced FeCrAl alloy, comprising the following steps carried out in sequence:

[0043] Step 1: Weigh the FeCrAl pre-alloyed powder and ZrC powder according to the ratio of 99.5% by weight: 0.5%. In terms of weight percentage, the Cr content in the FeCrAl pre-alloyed powder is 13.2%, the Al content is 5.6%, and the balance Iron and impurities meeting industry standards;

[0044] Step 2, put the mixed powder obtained in step 1 into a ball mill tank, and perform ball milling and mixing in an argon atmosphere. The speed of the ball mill is 300r / min, the ball milling time is 20h, and the ball-to-material ratio is 12:1 to obtain ZrC particles Evenly distributed mixed powder;

[0045] Step 3, put the ball-milled powder into a graphite mold, and then put it in a spark plasma sintering furnace for sintering. The spark plasma sintering temperature is 115...

Embodiment 3

[0048] This embodiment provides a specific comparative example for embodiment 2:

[0049] The FeCrAl-based alloy was prepared according to the preparation method of Example 1, with the difference that in the comparative example, the FeCrAl-based alloy was prepared without adding ZrC powder.

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Abstract

The invention discloses a preparation method of nano ZrC reinforced FeCrAl alloy. The preparation method of the nano ZrC reinforced FeCrAl alloy comprises a window frame and a window sash, wherein thewindow sash comprises a first window sash body and a second window sash body; the first window sash body is fixed to the window frame; a hollow area of the window frame is covered with the first window sash body; the second window sash body is rotatably connected to the window frame or a wall used for installing a squint window through a hinge piece; and the second window sash body can rotate around the hinge piece to overlap with the first window sash body. The squint window is convenient to install and maintain and has high safety in the maintenance process.

Description

technical field [0001] The invention relates to the technical field of iron-based structural materials and special alloy materials, in particular to core structural materials and fuel element cladding materials used in pressurized water reactors, and in particular to a preparation method of nano ZrC reinforced FeCrAl alloy. Background technique [0002] After the Fukushima nuclear accident in Japan, cladding materials for next-generation and future nuclear reactors are required to have better resistance to high-temperature water vapor oxidation than the current zirconium alloy cladding, and can provide a greater safety margin to avoid potential Core meltdown accident. Studies have shown that FeCrAl-based alloys with appropriate Cr and Al contents have become cladding materials for advanced nuclear reactors (such as military nuclear power reactors, etc.) because of their excellent resistance to high-temperature water vapor oxidation, good radiation resistance and corrosion re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/04B22F3/105B22F3/14B22F3/10B22F1/00B22F3/17B22F3/18C22C38/18C22C38/06C22C33/02G21C3/20
CPCY02E30/30
Inventor 王辉刘瑞何琨郑继云孙永铎王先平解怀英
Owner NUCLEAR POWER INSTITUTE OF CHINA
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