Positive mixing enthalpy dissimilar metal material welding method

Abstract

The invention discloses a positive mixing enthalpy dissimilar metal material welding method. The method includes the first step of welding material pretreatment, wherein two positive mixing enthalpy dissimilar metal materials are subjected to annealing to eliminate machining-induced residual stress, the metal materials are mechanically ground and mechanically polished by means of diamond polishing paste, and then the polished metal materials are subjected to solution corrosion so as to finish representation on an optical microscope or crystal grain morphological detection; the second step of magnetic pulse welding, wherein the two to-be-welded positive mixing enthalpy dissimilar metal materials are placed in an electromagnetic forming system, a coil in the powered-on electromagnetic forming system generates a pulsed high magnetic field by means of high-amplitude instantaneous current, the outer surface of a magnetic collector in the electromagnetic forming system simultaneously generates induced current under the action of the pulsed high magnetic field, so the first dissimilar metal material obtains impact kinetic energy instantaneously and impacts the second dissimilar metal material at high speed, and accordingly welding of the two dissimilar metal materials is achieved. By means of the method, metallurgical welding of positive mixing enthalpy dissimilar metal can be achieved, and accordingly welding products which are good in welding performance and have no obvious structural defects on joints are prepared and formed.

Description

technical field [0001] The invention belongs to the field of material welding technology and forming manufacturing, and relates to a welding method for positively mixed enthalpy heterogeneous metal materials. Background technique [0002] Welding is a fabrication technique for permanently joining materials into structures with a given function. Almost all products, from huge wheels of hundreds of thousands of tons to microelectronic components of less than 1 gram, rely on welding technology to varying degrees in production. Welding has penetrated into all fields of manufacturing, directly affecting the quality, reliability and life of products, as well as production costs, efficiency and market response speed. With the rapid development of modern science and technology, new materials and new structures are constantly appearing, welding combinations between different materials are increasing, and the requirements for welded structural parts are also increasing. Dissimilar m...

AI Technical Summary

Problems solved by technology

However, there are inevitably many problems such as high processing cost, complicated preparation of pre-weld test pieces, harsh welding conditions or low safety.

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