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Friction stir welding method for tungsten-boron-aluminum composite shielding material and strengthening process thereof

A composite shielding and friction stir technology, applied in welding equipment, manufacturing tools, non-electric welding equipment, etc., can solve the problems of not meeting the requirements of material mechanical properties, affecting tensile properties, etc., to ensure purity and performance, and reduce frictional heat. accumulation, avoid the effect of excessive stress

Inactive Publication Date: 2022-02-18
西安稀有金属材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because boron carbide and tungsten will react at high temperature to produce intermetallic compounds, and at the same time produce a large number of holes in the weld pool area, which seriously affects the tensile properties of the material after welding, so conventional brazing, laser welding, electron beam welding, etc. The high temperature welding method cannot meet the requirements of the mechanical properties of the welded material

Method used

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  • Friction stir welding method for tungsten-boron-aluminum composite shielding material and strengthening process thereof
  • Friction stir welding method for tungsten-boron-aluminum composite shielding material and strengthening process thereof
  • Friction stir welding method for tungsten-boron-aluminum composite shielding material and strengthening process thereof

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Experimental program
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Effect test

Embodiment 1

[0039] The method of the present embodiment comprises the following steps:

[0040] Step 1. Install the integrated tungsten steel stirring head in the friction stir welding equipment; the integrated tungsten steel stirring head is an integrated part between the clamping end, the stirring needle and the shaft, and a concentric heat dissipation ring is arranged between the shafts. Such as Figure 2a and Figure 2b shown;

[0041] Step 2. Assemble and fix the two tungsten-boron-aluminum plates, and form the area to be welded between the opposite end faces of the two tungsten-boron-aluminum plates, obtain the components to be welded, and set the pressure sensor on the lower part of the components to be welded, and then set the integrated The pressure between the tungsten steel stirring head and the components to be welded is 10MPa, and the rotation speed of the integrated tungsten steel stirring head is 800r / min and the travel speed is 60r / min;

[0042] Step 3. Start the fricti...

Embodiment 2

[0047] The method of the present embodiment comprises the following steps:

[0048] Step 1. Install the integrated tungsten steel stirring head in the friction stir welding equipment; the integrated tungsten steel stirring head is an integrated part between the clamping end, the stirring needle and the shaft, and a concentric heat dissipation ring is arranged between the shafts. Such as Figure 2a and Figure 2bshown;

[0049] Step 2. Assemble and fix the two tungsten-boron-aluminum plates, and form the area to be welded between the opposite end faces of the two tungsten-boron-aluminum plates, obtain the components to be welded, and set the pressure sensor on the lower part of the components to be welded, and then set the integrated The pressure between the tungsten steel stirring head and the components to be welded is 30MP, and the rotation speed of the integrated tungsten steel stirring head is 1200r / min and the travel speed is 120r / min;

[0050] Step 3. Start the fricti...

Embodiment 3

[0055] The method of the present embodiment comprises the following steps:

[0056] Step 1. Install the integrated tungsten steel stirring head in the friction stir welding equipment; the integrated tungsten steel stirring head is an integrated part between the clamping end, the stirring needle and the shaft, and a concentric heat dissipation ring is arranged between the shafts. Such as Figure 2a and Figure 2b shown;

[0057] Step 2. Assemble and fix the two tungsten-boron-aluminum plates, and form the area to be welded between the opposite end faces of the two tungsten-boron-aluminum plates, obtain the components to be welded, and set the pressure sensor on the lower part of the components to be welded, and then set the integrated The pressure between the tungsten steel stirring head and the components to be welded is 15MPa, and the rotation speed of the integrated tungsten steel stirring head is 1000r / min and the travel speed is 90r / min;

[0058] Step 3. Start the frict...

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Abstract

The invention discloses a friction stir welding method for a tungsten-boron-aluminum composite shielding material. The method comprises the steps that firstly, an integrated tungsten steel stirring head is installed; secondly, the two tungsten-boron-aluminum plates are assembled and fixed to obtain a to-be-welded assembly, and then the pressure, the rotating speed and the advancing speed are set; and 3, friction stir welding is performed to obtain the tungsten-boron-aluminum composite shielding material. The strengthening process comprises the following steps: 1, heating the tungsten-boron-aluminum composite shielding material at the temperature of 540 DEG C, preserving heat for 20 minutes, quenching at room temperature, preserving heat for 8 hours at the temperature of 180 DEG C, and cooling by air to obtain the strengthened tungsten-boron-aluminum composite shielding material. According to the friction stir welding method, generation of intermetallic compounds and generation of a large number of holes in a welding pool area are avoided, the mechanical property of the tungsten-boron-aluminum composite shielding material is improved, and efficient welding between tungsten-boron-aluminum plates is achieved; and according to the strengthening process, the tensile strength performance of the tungsten-boron-aluminum composite shielding material is remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a friction stir welding method and strengthening process of a tungsten-boron-aluminum composite shielding material. Background technique [0002] Boron carbide and tungsten-reinforced aluminum-based shielding material, that is, tungsten-boron-aluminum composite shielding material, is an advanced composite shielding material that not only has neutron absorption performance but also can shield radiation. However, because boron carbide and tungsten will react at high temperature to produce intermetallic compounds, and at the same time produce a large number of holes in the weld pool area, which seriously affects the tensile properties of the material after welding, so conventional brazing, laser welding, electron beam welding, etc. The high-temperature welding method cannot meet the requirements for the mechanical properties of the welded material....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/12B23K20/22B23K20/26
CPCB23K20/122B23K20/22B23K20/26
Inventor 潘晓龙张于胜刘璐孙国栋郑富凯田丰李海亮
Owner 西安稀有金属材料研究院有限公司
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