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TB5/copper alloy vacuum electron beam welding method

A technology of vacuum electron beam and welding method, applied in electron beam welding equipment, welding equipment, metal processing equipment and other directions, can solve the problems of intermetallic compound layered structure and the like

Inactive Publication Date: 2012-05-02
HARBIN INST OF TECH
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  • Summary
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that electron beam welding of dissimilar materials of TB5 titanium alloy and QCr0.8 copper alloy is easy to produce intermetallic compound layered structure

Method used

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specific Embodiment approach 1

[0024] Specific embodiment one: the welding object of TB5 titanium alloy described in this embodiment and copper alloy vacuum electron beam welding method is TB5 titanium alloy base material and QCr0.8 copper alloy base material, wherein the composition of TB5 titanium alloy base material is Al : 2.8-3.6% (weight), V: 14-16% (weight), Sn: 2.5-3.5% (weight), Cr: 2.5-3.5% (weight), the balance is Ti; the QCr0.8 copper The composition of alloy base material is Cr: 0.4~0.7% (weight), impurity ≤0.8% (weight), surplus is Cu; The welding method of the present invention is to adopt the vacuum electron beam welding method first to the butt joint surface of two base metals The welding seam is welded, and then the position 0.2mm to 1.0mm away from the QCr0.8 copper alloy side is parallel to the welding seam, and the vacuum electron beam welding method is used for secondary welding.

specific Embodiment approach 2

[0025] Specific embodiment two: This embodiment is an embodiment of the TB5 titanium alloy and copper alloy vacuum electron beam welding method described in the specific embodiment one. In this embodiment, the TB5 titanium alloy base material and QCr0.8 copper alloy The base metal is a plate with a thickness of 1.5 mm to 5.0 mm. The welding process described in this embodiment is:

[0026] Step 1. Pretreatment of the two plates to be welded;

[0027] Step 2. Adjust the relative position of the two plates so that the staggered sides of the butt surfaces of the two plates are less than 0.2mm, and the gap between the butt surfaces is less than 0.1mm; then fix the two plates with clamps so that the relative The position remains the same;

[0028] Step 3. Put the fixed two boards into the vacuum chamber and start vacuuming, so that the vacuum degree in the vacuum chamber is 5×10 -2 Pa to 5×10 -4 Between Pa;

[0029] Step 4. Focus the electron beam on the butt joint of two plate...

specific Embodiment approach 3

[0032] Specific embodiment three: this embodiment is a further description of the TB5 titanium alloy and copper alloy vacuum electron beam welding method described in specific embodiment two, and the pretreatment described in the step one refers to that the to-be-welded Mechanical grinding and chemical cleaning are carried out on the butt joint surface of the two plates and the surrounding area.

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Abstract

The invention relates to a TB5 / copper alloy vacuum electron beam welding method, belonging to the field of dissimilar material fusion welding and aiming at solving the problem of easy production of intermetallic compound laminated structure in the traditional TB5 / copper alloy dissimilar material electron beam welding. The difference between the method and the conventional welding method is that electron beam welding is carried out to the butting surfaces of TB5 titanium alloy and QCr0.8 copper alloy and a part with a certain distance deviating to the QCr0.8 copper alloy side in sequence by using an overlapped welding method. On one hand, the welding method of the invention can enable a weld joint between the TB5 titanium alloy and the QCr0.8 copper alloy to form good metallurgical bonding, and the joint does not have the welding defects of air holes, cracks and the like; and on the other hand, the welding method can weaken or eliminate the intermetallic compound laminated structure formed between the weld joint and the QCr0.8 copper alloy, continuously distributed weld joint structures can be obtained, and thus, the tensile strength of the joint can be increased to more than 70% of that of a QCr0.8 copper alloy parent material.

Description

technical field [0001] The invention relates to an electron beam welding method for dissimilar materials of TB5 titanium alloy and QCr0.8 copper alloy, and belongs to the field of fusion welding of dissimilar materials. Background technique [0002] TB5 titanium alloy is an excellent structural material, which has the characteristics of low density, high specific strength, good plasticity and toughness, good heat and corrosion resistance, and good machinability. It is used in aviation, aerospace, vehicle engineering, biomedical engineering and other fields. It has very important application value. QCr0.8 copper alloy has excellent electrical and thermal conductivity, ductility and excellent corrosion resistance. Therefore, it has been widely used in industrial and military sectors such as electrical, electronic, chemical, power, transportation and aerospace. The welding of dissimilar materials has been paid more and more attention by people. Its characteristic is that it ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K15/00B23K15/06
Inventor 张秉刚陈国庆刘伟宋国新冯吉才
Owner HARBIN INST OF TECH
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