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A Method for Rotary Friction Welding of Dissimilar Metals Assisted by Ultrasonic Vibration

A technology of rotational friction welding and ultrasonic vibration, applied in welding equipment, metal processing equipment, non-electric welding equipment, etc. Problems such as uneven radial distribution

Active Publication Date: 2021-05-04
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It can be seen that the thickness of the intermetallic compound in the dissimilar metal rotary friction welded joint is unevenly distributed along the radial direction, which seriously affects the service performance of the heterogeneous metal composite structural parts. An effective solution to the problem of non-uniform performance

Method used

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  • A Method for Rotary Friction Welding of Dissimilar Metals Assisted by Ultrasonic Vibration
  • A Method for Rotary Friction Welding of Dissimilar Metals Assisted by Ultrasonic Vibration
  • A Method for Rotary Friction Welding of Dissimilar Metals Assisted by Ultrasonic Vibration

Examples

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Embodiment 1

[0032] Ultrasonic-assisted rotational friction welding process of 5052 aluminum alloy and 304 stainless steel.

[0033] This embodiment is a process for ultrasonic-assisted rotary friction welding of 5052 aluminum alloy and 304 stainless steel, the welding process mainly includes the following steps:

[0034] Step 1, machining the welded workpiece of 5052 aluminum alloy and 304 stainless steel with a diameter of 25mm, and machining a welding end step of φ23×20mm on the surface side of the 304 stainless steel to be welded, and the surface roughness to be welded is Ra<1.6;

[0035] Step 2, clean the welding end face of 304 stainless steel: use #400, #800, #1200, #1500, #2000 sandpaper to polish the surface, immerse the polished workpiece surface in acetone and ultrasonically clean it for 5 minutes, and then dry it with cold air;

[0036] Step 3, fix the 304 stainless steel on the rotating part, the length beyond the rotating part is 20mm. The 5052 aluminum alloy is fixed on the...

Embodiment 2

[0043] Ultrasonic-assisted rotational friction welding process of 1060 pure aluminum and T2 copper.

[0044] Step 1, machining 1060 pure aluminum and T2 red copper welding workpiece with a diameter of 25mm, and processing it into a step of φ24×20mm on the side of the T2 red copper surface to be welded, and the roughness of the surface to be welded is Ra<1.6;

[0045] Step 2, clean the T2 red copper welding end face: use #400, #800, #1200, #1500, #2000 sandpaper to polish the surface, immerse the polished workpiece surface in acetone and ultrasonically clean it for 5 minutes, and then dry it with cold air;

[0046] Step 3, fix the T2 red copper on the rotating part, and the length beyond the rotating part is 20mm. The 1060 pure aluminum is fixed on the moving part, and the length beyond the moving part is 40mm. In addition, it is necessary to ensure that the central axis of the 1060 pure aluminum rod is consistent with that of the T2 copper rod;

[0047] Step 4, place the too...

Embodiment 3

[0053] Ultrasonic-assisted rotational friction welding process of TC4 titanium alloy and 1Cr18Ni9Ti stainless steel.

[0054] Step 1, machining a TC4 titanium alloy with a diameter of 16mm and a 1Cr18Ni9Ti stainless steel welding workpiece, and the surface roughness to be welded is Ra<1.6;

[0055] Step 2, clean the welding end face of 1Cr18Ni9Ti stainless steel: use #400, #800, #1200, #1500, #2000 sandpaper to polish the surface, immerse the polished workpiece in acetone and ultrasonically clean it for 5 minutes, and then dry it with cold air;

[0056] Step 3, fix the 1Cr18Ni9Ti stainless steel on the rotating part, and the length beyond the rotating part is 20mm. The TC4 titanium alloy is fixed on the moving part, and the length beyond the moving part is 30mm. In addition, it is necessary to ensure that the central axis of the TC4 titanium alloy rod is consistent with that of the 1Cr18Ni9Ti stainless steel rod;

[0057] Step 4, place the tool head of the ultrasonic generat...

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Abstract

The invention provides a method for improving the microstructure and performance of the rotary friction welding joint of heterogeneous metals. The ultrasonic generator is fixed on the moving part of the traditional rotary friction welding, and the high-frequency mechanical vibration energy of the ultrasonic wave is used to drive the plastic metal of the interface layer along the Radial high-frequency vibration, in order to reduce the rheological resistance of the plastic metal in the radial direction, enhance the flow capacity of the plastic metal, and change the rotational friction welding from circular motion to circular and linear compound motion. Ultrasonic vibration-assisted rotary friction welding can increase the strain and strain rate of the soft metal near the welding interface, refine the grains on both sides of the interface, help release the residual stress during the welding process, and improve the mechanical properties of the joint.

Description

technical field [0001] The invention relates to a material connection technology, in particular to a process method for improving the microstructure and performance of a rotary friction welding joint of heterogeneous metals assisted by ultrasonic vibration. Background technique [0002] Compared with traditional fusion welding, rotary friction welding has the advantages of low heat input, high efficiency and energy saving, and can effectively control the formation of intermetallic compounds at the welding interface. It is especially suitable for welding dissimilar metals, such as: titanium / steel, aluminum / steel, aluminum / copper, Aluminum / magnesium etc. According to the change of friction torque with time, the rotary friction welding can be divided into three stages: heating stage, quasi-steady state stage and upsetting stage. In the heating stage of friction welding, the contact surface changes from elastic contact to viscoplastic contact, and the plastic ring begins to spr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/12B23K20/26
CPCB23K20/12B23K20/26
Inventor 李鹏董红刚李艳光王帅
Owner DALIAN UNIV OF TECH
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