Titanium filter screen welding technology

Abstract

The invention provides a titanium filter screen welding technology, and relates to the welding technology technical field; the technology comprises the following steps: 1, preparing a cleaning agent according to the following weight ratio: 35-40% of nitric acid, 1-3% of hydrofluoric acid, and balance water, placing titanium filament and titanium reinforcement ribs in the cleaning agent, heating the cleaning agent up to 37-66 DEG C, and keeping the temperature for 15-20 minutes; 2, removing the titanium filament and titanium reinforcement ribs from the cleaning agent, and using alcohol or acetone to clean the surfaces; 3, carrying out one-time multi-point simultaneous spot welding for the titanium filament and titanium reinforcement ribs under the parameters of voltage 26-30V, current 800-1000A, 0.2-0.3 seconds welding time, and 0.28 second lasting time, wherein the same welding portion is spot-welded twice, and an argon protection holder cover with purity greater than 99.99% is added on the welding portion. The titanium filter screen obtained by the welding technology is less in defects and high in welding quality.

Description

technical field [0001] The invention relates to the technical field of welding technology, in particular to a welding technology of a titanium filter screen. Background technique [0002] Titanium filter is composed of pure titanium wire and titanium reinforcement. Titanium filter has the characteristics of light specific gravity, stable chemical properties, high temperature resistance, low temperature resistance, strong acid resistance, strong alkali resistance, and high strength. Among titanium filter screens, pure The titanium wire and the titanium reinforcing bar are generally connected together by welding. Usually, the distance between the mesh wires of the titanium filter is small, which requires that the deformation of each weldment is very small during the welding process. At the same time, Since titanium is a very active metal element, it has a strong affinity with N, H, and O elements. Therefore, conventional manual arc welding, gas welding, and carbon dioxide weld...

AI Technical Summary

Problems solved by technology

[0002] Titanium filter is composed of pure titanium wire and titanium reinforcement. Titanium filter has the characteristics of light specific gravity, stable chemical properties, high temperature resistance, low temperature resistance, strong acid resistance, strong alkali resistance, and high strength. Among titanium filter screens, pure The titanium wire and the titanium reinforcing bar are generally connected together by welding. Usually, the distance between the mesh wires of the titanium filter is small, which requires that the deformation of each weldment is very small during the welding process. At the same time, Since titanium is a very active metal element, it has a strong affinity with N, H, and O elements. Therefore, conventional manual arc welding, gas welding, and carbon dioxide welding are prone to large deformation, cracks, pores, and joints at the weld. The parts are brittle and hard, and the toughness is poor. In summary, the above welding methods cannot well meet the requirements of titanium filter mesh welding.