A kind of aluminum sheet used for frame in neutron detector and its preparation process

A neutron detector and preparation process technology, applied in the measurement of neutron radiation, the improvement of process efficiency, the coating process of metal materials, etc. slag and other problems, to achieve the effect of uniform internal structure without slag inclusion, reducing pollution and reducing the difficulty of operation

Active Publication Date: 2022-04-05
XINJIANG JOINWORLD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the magnesium ingot addition process is not clear, and the device may cause contamination of the molten aluminum; the refining process of the aluminum melt is not mentioned, which may cause oxidation and slag inclusions inside the melt

Method used

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  • A kind of aluminum sheet used for frame in neutron detector and its preparation process
  • A kind of aluminum sheet used for frame in neutron detector and its preparation process
  • A kind of aluminum sheet used for frame in neutron detector and its preparation process

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preparation example Construction

[0056] A preparation process of an aluminum sheet for a frame in a neutron detector, comprising the following steps:

[0057] (1) After the high-purity aluminum ingot is completely melted, it is refined once with high-purity argon to obtain melt 1;

[0058] (2) Add high-purity magnesium ingots to the melt 1, and after complete melting, melt 2 is obtained;

[0059] (3) The melt 2 is subjected to secondary refining with high-purity argon, and the slag is removed to obtain the melt 3;

[0060] (4) The melt 3 adopts high-purity argon to carry out on-line refining to obtain the melt 4;

[0061] (5) The melt 4 adopts high-purity argon to carry out double-stage plate filtration to obtain the melt 5;

[0062] (6) Casting: Casting under the protection of inert gas to obtain flat ingots;

[0063] (7) After milling the surface of the flat ingot, it is processed by hot rolling and cold rolling to obtain foil;

[0064] (8) Cleaning the foil for four passes to obtain the aluminum sheet ...

Embodiment 1

[0080] Process flow chart such as figure 1 As shown, the specific operation steps are as follows:

[0081] (1) Ultra-pure raw materials: use high-purity aluminum raw materials with a purity of more than 99.9995 wt%, wherein U+Th≤1ppb. High-purity magnesium ingot with a purity of 99.97%, where U+Th≤1ppb.

[0082] (2) Melting: High-purity aluminum raw materials are added to an intermediate frequency induction melting furnace to heat up and melt. The lining of the intermediate frequency melting furnace is made of refractory materials, and the content of alumina in the refractory materials is controlled to be ≥ 90%, so as to avoid the pollution of the lining to the molten aluminum during the melting process.

[0083] (3) Primary refining in the furnace: After the molten aluminum is completely melted, the temperature of the molten aluminum is controlled at 730-750°C, and argon gas with a purity of 99.999% is passed through the furnace for primary refining. Control the argon gas ...

Embodiment 2

[0095] The specific operation steps are as follows:

[0096] (1) Al in refractory materials for lining of intermediate frequency melting furnace 2 o 3 The proportion is 92.5%. Add 6 tons of high-purity aluminum ingots to the intermediate frequency melting furnace for molten aluminum melting. The purity of high-purity aluminum ingot is 99.9995%, among which U is 0.00012ppm and Th is 0.00036ppm.

[0097] (2) After the high-purity aluminum ingot is completely melted, use a thermocouple to measure the temperature, and control the temperature of the molten aluminum to 730-750°C to start the primary refining in the furnace. A high-purity argon gas is passed through the furnace for primary refining. Control the argon gas flow to 4.0Nm 3 / h, the refining time is 15min, and after the refining is finished, use a high-purity graphite spoon to salvage the scum on the surface of the molten aluminum.

[0098] (3) Add magnesium ingots after refining. The purity of magnesium ingot is 9...

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Abstract

The invention relates to an aluminum sheet used for a frame in a neutron detector and a preparation process thereof. A process for preparing an aluminum sheet for a frame in a neutron detector, comprising: (1) melting a high-purity aluminum ingot and refining it once to obtain a melt 1; (2) adding a high-purity magnesium ingot and melting to obtain a melt 2 (3) said melt 2 is subjected to secondary refining to obtain melt 3; (4) said melt 3 is carried out on-line refining to obtain melt 4; (5) said melt 4 is subjected to two-stage Plate filtration to obtain melt 5; (6) casting to obtain flat ingot; (7) after face milling, hot rolling and cold rolling to obtain foil; (8) cleaning the foil to obtain the obtained Aluminum sheets are used for the framework of the above-mentioned neutron detector. The invention uses high-purity aluminum to add high-purity magnesium ingots to configure high-purity aluminum-magnesium alloy melts, and casts aluminum-magnesium flat ingots after refining, filtering, degassing and slag removal; and then cold-rolling, hot-rolling and cleaning the aluminum-magnesium flat ingots Obtain foils with purity and strength that meet the requirements for use in neutron detectors.

Description

technical field [0001] The invention specifically relates to an aluminum sheet used for a frame in a neutron detector and a preparation process thereof. Background technique [0002] Neutron scatterers are widely used in technical research such as radiation monitoring and neutron imaging. The detection efficiency of a neutron detector is the most important performance index of a neutron detector. In recent years, the main directions of neutron detector research include: 1. Based on 6LiF / ZnS(Ag) scintillator; 2. Based on boron-coated GEM (Gas Electron Multiplier) detector; 3. Based on inner-coated boron tube detector; 4. Based on BF 3 tube; five, grid gas detector. [0003] The European Spallation Neutron Source (hereinafter referred to as ESS) is located in Lund, Sweden. It is an interdisciplinary research institution under construction. Among the neutron detectors used are those based on boron-converted multi-level grid gas. Boron-plated aluminum strips are used to form...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/06C22C1/02C22B9/05C22B9/02B22D7/00G01T3/00C23C14/35C23C14/16
CPCC22C21/06C22C1/026C22B9/05C22B9/023C22B9/006B22D7/005G01T3/00C23C14/35C23C14/165Y02P10/20
Inventor 徐亚军马小红沈英华白毅马青李永奇张博李光强杨冰冰
Owner XINJIANG JOINWORLD CO LTD
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