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A kind of niti and ti6al4v dissimilar metal composite welding method

A hybrid welding and dissimilar metal technology, applied in welding equipment, laser welding equipment, metal processing equipment, etc., can solve problems such as brittle fracture, reduce welding deformation, increase service life, and improve mechanical properties.

Active Publication Date: 2020-11-03
JIANGSU UNIV
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Problems solved by technology

This method can effectively solve the problem of brittle fracture of dissimilar metal welded parts and effectively improve the welding quality, which has strong novelty and creativity

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  • A kind of niti and ti6al4v dissimilar metal composite welding method
  • A kind of niti and ti6al4v dissimilar metal composite welding method
  • A kind of niti and ti6al4v dissimilar metal composite welding method

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Embodiment Construction

[0019] The specific implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, but the present invention should not be limited to the examples.

[0020] This embodiment uses Ti6Al4V alloy and Ni-Ti alloy as the implementation objects, and the specific dimensions are as follows figure 2 shown.

[0021] A kind of example of NiTi and Ti6Al4V dissimilar metal composite welding method, its concrete steps are:

[0022] (1) Cut two steel plates with a thickness of 10mm into a groove type that can be lap welded, and the groove thickness of the cut plates is 4.5mm.

[0023] (2) Texturize the upper surface of the groove of Ti6Al4V. The textured area is a rectangular area with a distance of 5 mm from the edge of the groove, and the surface roughness of the textured area is greater than or equal to 5 μm. Use acetone solution to clean the surface of Ti6Al4V to remove surface oil and dust,

[0024] (3) Coating a ...

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Abstract

The invention relates to the technical field of metal material welding / connection, in particular to a NiTi and Ti6Al4V dissimilar metal composite welding method. The NiTi and Ti6Al4V dissimilar metalcomposite welding method comprises the following steps of: cutting a groove of a metal plate to be welded into a groove for lap welding by using wire cutting; carrying out stirring friction welding onthe center line large-area lapping joint part of Ti6Al4V alloy and a Ni-Ti alloy plate; coating the surface of the groove formed by cutting the Ti6Al4V plate with a layer of niobium; taking the niobium as a transition metal layer to be connected to the Ni-Ti alloy; and using a laser welding method on the surface junction of two metals, and adding niobium metal powder for double side welding in the welding process. By using different methods to weld the lapping joint transverse and longitudinal junctions of the two metals, the service capacity of a welding part is improved when the welding part suffers forces from different directions, and the service life of the welding part is prolonged. The NiTi and Ti6Al4V dissimilar metal composite welding method has wide application prospect.

Description

technical field [0001] The invention relates to the technical field of welding (connection) of metal materials, in particular to a compound welding method of NiTi and Ti6Al4V dissimilar metals, which can effectively improve the service life of dissimilar metal welded parts in industrial applications. Background technique [0002] The welding of Ni-Ti alloy and Ti6Al4V alloy is mainly used in the fields of biomedicine and aviation. The most important performance of Ni-Ti alloy is that it has the function of memory alloy and also has good physical properties, fatigue resistance, corrosion resistance and other properties. The wide application of the alloy is greatly improved. Ti6Al4V is the most widely used alloy in the fields of aviation, nuclear power, chemistry and biology. In actual production applications, these metal materials are being integrated into a highly complex overall system, so it is necessary to weld (connect) these two metals with different properties. Due to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/346B23K26/60B23K103/18
CPCB23K26/346B23K26/60
Inventor 鲁金忠徐刚罗开玉
Owner JIANGSU UNIV
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