Preparation method for 5-series aluminum alloy welding wire containing rare-earth elements Nd and Ce

Abstract

The invention provides a preparation method for a 5-series aluminum alloy welding wire containing rare-earth elements Nd and Ce, and belongs to the technical field of preparation for aluminum alloy welding wires. According to the method, an Al-Nd intermediate alloy and an Al-Ce intermediate alloy are machined into powders or chippings as adding raw materials, and an adding manner of mixing with arefining agent and then carrying out hot-pressing to form a blank is adopted, so that the preparation process is simplified and the cost is saved, oxide inclusions are reduced, and a second phase is uniformly separated out, so that the quality of an aluminum melt is further improved; and air pores of 5-series aluminum alloy are reduced, so that the problems of welding joint hot-cracking, low welding joint strength, low welding joint stability and the like occurring in a welding process are solved, meanwhile, the strength and toughness, the corrosion resistance, the hot workability and other comprehensive performance of the 5-series aluminum alloy welding wire are improved, and a wide market application prospect is achieved.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy welding wire. In particular, it relates to an aluminum alloy welding wire containing rare earth Nd and Ce and a preparation method thereof. Background technique [0002] With the wide application of aluminum alloys in high-speed trains and new energy vehicles, the requirements for performance and quality, especially lightweight, are getting higher and higher, and aluminum alloy welding technology has developed rapidly. The demand for aluminum alloys has seen a blowout growth. In the case of a certain base metal matrix, it mainly depends on the welding process and the alloy composition and performance of the welding wire. The quality of the welding wire is the key factor affecting the overall performance of welding. At present, the weldability of 5-series aluminum-magnesium alloy is better, and the application of welding wire is more. [0003] The preparation methods of aluminum alloy weld...

AI Technical Summary

Problems solved by technology

[0007] The invention provides a method for preparing a 5-series aluminum alloy containing rare earth elements Nd and Ce. The welding wire prepared by the process is a common aluminum alloy welding wire for the 5-series aluminum alloy. The process uses Al-Nd and Al-Ce intermediate The alloy is processed into powder or chips and uniformly mixed with the refining agent to form a prefabricated block as a raw material. The addition method of multiple additions simplifies the preparation process, saves costs, reduces oxidation inclusions, and uniformly precipitates the second phase. Further improve the quality of aluminum melt; reduce the pores of 5-series aluminum alloys, solve the problems of weld thermal cracking, low weld strength and poor weld stability during welding, and improve the strength of 5-series aluminum alloy welding wires Strong toughness, corrosion resistance, thermal processing performance and other comprehensive properties, broad market application prospects