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Welding method for aluminum-steel composite member and aluminum-steel composite member

A welding method and technology of composite parts

Active Publication Date: 2015-11-11
SICHUAN ANQINGFU ELECTRONICS TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, the technical problem to be solved by the present invention is to overcome the technical problem that the production method of steel-aluminum composite parts in the prior art makes the joint between steel and aluminum not firm, so as to propose an aluminum-steel joint that can make the joint between steel and aluminum firm. Composite production method

Method used

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  • Welding method for aluminum-steel composite member and aluminum-steel composite member
  • Welding method for aluminum-steel composite member and aluminum-steel composite member

Examples

Experimental program
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Effect test

Embodiment 1

[0031] This embodiment provides a welding method for aluminum-steel composite parts, comprising the following steps:

[0032] S1: Use plate-like aluminum parts with a surface roughness of Ra1.6 and cylindrical steel parts with a surface roughness of Ra1.6. The thickness of the aluminum part is 9mm, the diameter of the steel part is 20mm, and the aluminum part is 1060 Pure aluminum, steel parts are 304 stainless steel;

[0033] S2: Fix the aluminum parts and steel parts, and make the plate surface of the aluminum part and the end face of the steel part align and contact to form a welding surface, and apply a force to the steel part and perpendicular to the welding surface on the aluminum part The force or the component of the force, so that the force or the component of the force produces a pressure of 280KN on the welding surface;

[0034] S3: Keep the pressure on the welding surface, and make the steel part rotate relative to the aluminum part, the rotation speed is 300 rpm,...

Embodiment 2

[0039] S1: Use plate-like aluminum parts with a surface roughness of Ra1.6 and cylindrical steel parts with a surface roughness of Ra5.6. The thickness of the aluminum parts is 10mm, and the diameter of the steel parts is 21mm;

[0040] S2: Fix the aluminum parts and steel parts, and make the plate surface of the aluminum part and the end face of the steel part align and contact to form a welding surface, and apply a force to the steel part and perpendicular to the welding surface on the aluminum part The force or the component of the force, so that the force or the component of the force produces a pressure of 320KN on the welding surface;

[0041] S3: Keep the pressure on the welding surface, and make the steel part rotate relative to the aluminum part, the rotation speed is 400 rpm, stop the rotation of the steel part after 3s, and make the steel part rotate during the rotation of the steel part. The parts are gradually inserted into the aluminum parts at a speed of 0.8mm / s...

Embodiment 3

[0046] S1: Use plate-like aluminum parts with a surface roughness of Ra6.3 and cylindrical steel parts with a surface roughness of Ra4.6. The thickness of the aluminum parts is 13mm, and the diameter of the steel parts is 23mm;

[0047] S2: Fix the aluminum parts and steel parts, and make the plate surface of the aluminum part and the end face of the steel part align and contact to form a welding surface, and apply a force to the steel part and perpendicular to the welding surface on the aluminum part The force or the component of the force, so that the force or the component of the force produces a pressure of 380KN on the welding surface;

[0048] S3: Keep the pressure on the welding surface, and make the steel part rotate relative to the aluminum part, the rotation speed is 500 rpm, stop the rotation of the steel part after 4s, and make the steel part rotate during the rotation of the steel part. The parts are gradually inserted into the aluminum parts at a speed of 0.9mm / s...

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Abstract

The invention provides a welding method for an aluminum-steel composite member. The surface roughness, the pressure, the number of revolution, the inserting speed and the cooling speed are reasonably set, enough temperature can be provided during welding to cause a plastic deformation in metal at the solder side, and generate an aluminum-steel combination area having enough thickness in the weld after welding, no bubbles, cracks and other defects generate in the weld, and the tensile strength of the weld is larger than that of an aluminum substrate. Residual stress of the weld can be removed through local heating the solder side after welding, and the joint strength of the weld can be raised.

Description

technical field [0001] The invention relates to a welding method for an aluminum-steel composite part and the aluminum-steel composite part, belonging to the technical field of friction welding technology. Background technique [0002] In the prior art, for the joining of dissimilar metals such as steel and aluminum, fusion welding is usually used, or mechanical connection methods such as rivets are used, or adhesive bonding is used. [0003] When fusion welding is used, because the heat input to the welding part is too large, it is easy to form fragile intermetallic compounds at the joint surface between steel and aluminum, which reduces the joint strength between steel and aluminum. Under long-term use, especially Under the action of torque, the weld is prone to breakage, resulting in structural failure. [0004] When glue is used for bonding, the bonding force between steel and aluminum often fails to meet the requirements, and the glue may further reduce the bonding for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/00B23K20/14B23K20/24B23K20/227B23K33/00
CPCB23K20/001B23K20/14B23K20/2275B23K20/24B23K33/00
Inventor 尹英雄蔡荣凯
Owner SICHUAN ANQINGFU ELECTRONICS TECH CO LTD
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