Superposing and welding method of electron beams of chromium bronze and two-phase titanium alloy dissimilar materials

A technology of phase titanium alloy and dissimilar materials, which is applied in the field of fusion welding of dissimilar materials, to achieve the effect of improving organizational structure, increasing tensile strength and eliminating adverse effects

Inactive Publication Date: 2012-06-06
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that electron beam welding of dissimilar materials of chromium bronze and duplex titanium alloy is easy to produce intermetallic compound layered structure

Method used

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specific Embodiment approach 1

[0022] Specific embodiment one: a kind of chrome bronze described in this embodiment mode and duplex titanium alloy dissimilar material electron beam overlay welding method, its welding object is TC4 duplex titanium alloy base material and QCr0.8 chromium bronze alloy base material, The composition of the TC4 duplex titanium alloy is Al: 6.2% (weight), V: 3.5% (weight), impurities≤0.2% (weight), and the balance is Ti; the composition of the QCr0.8 chromium bronze alloy is Cr: 0.4 ~0.7% (weight), impurity≤0.8% (weight), and the balance is Cu. The welding process is to firstly check the gap between the butt joint surfaces of the TC4 duplex titanium alloy base material and the QCr0.8 chromium bronze alloy base material Electron beam welding is realized, and then the second electron beam welding is carried out on the side of the QCr0.8 chromium bronze alloy base material and at a distance of 0.2 to 1.0mm from the butt joint.

specific Embodiment approach 2

[0023] Specific embodiment two: This embodiment is an embodiment of the electron beam superposition welding method of a chromium bronze and dual-phase titanium alloy dissimilar materials described in specific embodiment one. In this embodiment, the TC4 dual-phase titanium alloy base material and The QCr0.8 chromium bronze alloy base metal is a plate with a thickness of 1.5 mm to 5.0 mm. The welding process of this embodiment is as follows:

[0024] Step 1. Pretreatment of the TC4 duplex titanium alloy plate and the QCr0.8 chromium bronze alloy plate to be welded;

[0025] Step 2, adjust the relative position of the butt joint surfaces of the two plates, so that the staggered sides of the butt joint surfaces of the two plates are less than 0.2 mm, and the gap between the butt joint surfaces of the two plates is less than 0.1 mm; then fix the two plates with a clamp One plate, to ensure that the relative position of the two plates remains unchanged;

[0026] Step 3. Put the two...

specific Embodiment approach 3

[0030] Specific embodiment three: the difference between this embodiment and the electron beam superposition welding method of a kind of chromium bronze and duplex titanium alloy dissimilar materials described in specific embodiment 2 is that the TC4 duplex titanium alloy to be welded described in step one The pretreatment of the plate and the QCr0.8 chrome bronze alloy plate refers to mechanical grinding and chemical cleaning of the welding surface of the TC4 duplex titanium alloy plate to be welded and the QCr0.8 chrome bronze alloy plate and the surrounding area.

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Abstract

The invention relates to a superposing and welding method of electron beams of chromium bronze and two-phase titanium alloy dissimilar materials, belonging to the field of fusion welding of dissimilar materials. The invention aims to solve the problem that the layered structure of intermetallic compounds can be generated easily in electron beam welding of chromium bronze and two-phase titanium alloy dissimilar materials. Different from the conventional welding method, the superposing and welding method of the invention is used for respectively carrying out electron beam welding on the abutting surface of TC4 two-phase titanium alloy and QCr0.8 chrome bronze alloy and at a certain distance deflecting to the side of the QCr0.8 chrome bronze alloy. On the one hand, by adopting the method of the invention, the welding seams of the TC4 two-phase titanium alloy and the QCr0.8 chrome bronze alloy can form good metallurgical bonding, and joints do not have welding defects such as gas holes, cracks and the like; and on the other hand, the layered structure of intermetallic compounds formed at the welding seams and the side of the QCr0.8 chrome bronze alloy can be weakened or eliminated to obtain welding seam tissues which are distributed continuously, thus the tensile strength of the joints can be improved by more than 70% of the tensile strength of the parent materials of the QCr0.8 chrome bronze alloy.

Description

technical field [0001] The invention relates to an electron beam welding method for dissimilar materials of TC4 duplex titanium alloy and chromium bronze alloy, and belongs to the field of fusion welding of dissimilar materials. Background technique [0002] TC4 duplex 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, and biomedical engineering. And other fields have very important application value. QCr0.8 chromium bronze 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...

Claims

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Application Information

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