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Electron beam welding method for dissimilar materials of nickel-aluminum bronze alloy and TC4 titanium alloy

A technology of electron beam welding and nickel aluminum bronze, which is applied in the direction of electron beam welding equipment, welding equipment, metal processing equipment, etc., can solve problems such as intermetallic compound layered structure, achieve the effect of eliminating adverse effects and improving the structure of joints

Inactive Publication Date: 2010-12-22
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • 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 TC4 titanium alloy and nickel-aluminum-bronze alloy easily produces intermetallic compound layered structure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0023] Specific embodiment one: the electron beam welding method of a kind of nickel-aluminum bronze and TC4 titanium alloy dissimilar materials described in this embodiment is after adopting the existing electron beam welding method to weld the butt joint surfaces of the two base materials, Then electron beam welding is used to carry out the second welding on the side of the nickel-aluminum bronze base material and at a distance of 0.2 mm to 1.0 mm from the weld seam. The base material for welding is TC4 titanium alloy base material and nickel-aluminum bronze base material , wherein the composition of the TC4 titanium alloy base material is Al: 6.2% (weight), V: 3.5% (weight), impurities≤0.2% (weight), and the balance is Ti; the composition of the nickel-aluminum bronze alloy base material is Al: 8.5 to 10.0% by weight, Ni: 4.0 to 5.0% by weight, Fe: 4.0 to 5.0% by weight, Mn: 0.8 to 2.5% by weight, and the balance is Cu.

specific Embodiment approach 2

[0024] Embodiment 2: This embodiment is a specific embodiment of the electron beam welding method for nickel-aluminum bronze and TC4 titanium alloy dissimilar materials described in Embodiment 1. Both the TC4 titanium alloy base material and the nickel-aluminum bronze base material in this embodiment are plates with a thickness of 1.5 mm to 5.0 mm, and the specific process of the welding method is as follows:

[0025] Step 1, pretreating the two plates to be welded;

[0026] Step 2. Adjust the relative position of the two plates so that the wrong side of the butt joint surfaces of the two plates is less than 0.2 mm, and the gap between the butt faces is less than 0.1 mm; then fix the two plates with a clamp to keep the two plates The relative position of the plates remains unchanged;

[0027] Step 3. Put the two boards that have been fixed 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 within Pa;

[002...

specific Embodiment approach 3

[0031] Specific embodiment three: This embodiment is a further limitation of the electron beam welding method of a nickel-aluminum bronze and TC4 titanium alloy dissimilar materials described in the second specific embodiment, the two pieces to be welded described in the step one The pretreatment of the boards refers to mechanically polishing and chemically cleaning the butt joint surfaces of the two boards and their surrounding areas.

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Abstract

The invention discloses an electron beam welding method for dissimilar materials of a nickel-aluminum bronze alloy and a TC4 titanium alloy, belongs to the field of dissimilar material fusion welding, and aims to solve the problem that an intermetallic compound layered structure is easily produced in the electron beam welding of the dissimilar materials of the nickel-aluminum bronze alloy and the TC4 titanium alloy. Different from the conventional welding method, the electron beam welding method is performed on the abutting surfaces of the TC4 titanium alloy and the nickel-aluminum bronze alloy respectively by deviating a certain distance to a nickel-aluminum bronze alloy side by using a superposition welding method. On the one hand, excellent metallurgical bonding can be formed on the welding line of the TC4 titanium alloy and the nickel-aluminum bronze alloy, and a joint does not have any welding defects, such as pores, cracks and the like; and on the other hand, the intermetallic compound layered structure formed by the welding line and the nickel-aluminum bronze alloy side can be weakened or eliminated, and continuously distributed weld microstructures can be obtained, so that the tensile strength of the joint can be improved to over 70 percent of that of the mother metal of the nickel-aluminum bronze alloy. The welding method in the invention is suitable for welding the conventional plate-like and tubular mother metals.

Description

technical field [0001] The invention relates to an electron beam welding method for dissimilar materials of nickel-aluminum bronze and TC4 titanium alloy, and belongs to the field of fusion welding of dissimilar materials. Background technique [0002] TC4 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. Nickel aluminum 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 characteristic...

Claims

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Application Information

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