The editor of Duomu Industrial believes that the micro-beam plasma welding machine has good controllability. During the welding process, factors such as welding current, speed, ion gas flow, welding torch structure and pre-welding treatment have a great influence on welding quality. Micro Both solid solution strengthening and age-strengthened superalloys with low content of AL and TI can obtain good welding quality.
Aluminum and aluminum welding mostly use rectangular AC welding power source, use argon gas as plasma gas source, and use micro-beam plasma welding machine for pure aluminum and rust-proof aluminum, which has good electric welding performance, and the arc welding contact of cemented carbide is better. good.
In order to obtain high-quality welds, the following points should be paid attention to when using the micro-beam plasma welder:
Clean the weldment and welding wire before welding to prevent pores in the formed weld. The protection of the weld and the wire should also be strengthened.
(2) Micro-beam plasma welding machine allows the use of plasma gas flow rate is small, the flow rate is slightly larger, the plasma arc blowing force is too large, aluminum and liquid metal are blown upwards, forming convex bumps or discontinuous peak-shaped welds .In order to improve the cooling effect of the tungsten electrode, the nozzle diameter can be appropriately increased or a porous nozzle can be selected.
When the plate thickness is greater than 6 mm, it is required to preheat 100-200°C before welding. Using helium as a plasma gas and gas protector can improve efficiency and welding quality.
The editor of Duomu Industry recommends that when using a micro-beam plasma welder for multi-pass welding, the surface of the weld bead should be cleaned in time after each weld is completed until the aluminum surface is completely exposed. Micro-plasma arc welding has high energy density, high input energy and high efficiency. Titanium and titanium alloy plates with a thickness of 2.5-15mm are welded at one time by the "small hole" method, which can effectively prevent the generation of pores. Micro-plasma arc welding The energy density is between the tungsten argon arc and the electron beam. When the micro-beam plasma welder is used for welding, the heat-affected zone is small and the welding deformation is easy to control. At present, the micro-beam plasma welder has been successfully used for thin plate welding.
