Article presents results of using padding welding technology with laser and filler wire as an additional material. Research work presented in this paper shown relation between laser parameters and padding welds geometry. Possibility of rapid prototyping of spatial structures are presented.
Paper presents results of microstructure and mechanical tests of welded joints of new generation Super304 austenitic stainless steel using high power CO2 laser (LBW method) with bifocal welding head. Super304 is modified 304 steel dedicated to energetic installation material, designed to replace currently used. High content of chromium and nickel with others alloying elements improve its resistance and strength characteristic. Use of Super304 steel for production of the superheaters, heating chambers and walls in steam boilers resulted in various weldability researches.
In article are presented results of destructive and non-destructive tests. For destructive: static bending and Vickers hardness tests, and for non-destructive: VT, RT, UT, micro and macroscopic tests were performed.
Plastics are used as a construction material in many branches of industry, in particular in the biomedical industry, mechatronics, electronics, automotive industry and chemical devices. The study presents the results of the tests on the effects of micromachining of elastomeric materials with UV Laser Marker. The analysis of the impact of machining parameters on the performance and the quality of machining was the key point of the study, which allowed to recommend the most favourable machining parameters for materials, such as fluorinated elastomer (FPM) and silicone (MVQ). The authors perceive the prospective application of the developed technology in sealing and microfluidization. The results of the tests on the frictional resistance reduction of a pneumatic actuator with a piston sealing and a textured friction face are presented in the final part of the study.
The paper presents selected results of model and technological experiments of welding iridium-platinum tips to spark plug electrodes. Variants of welding technology included different ways of preparing materials and the use of different Nd: YAG lasers (Rofin BLS 720 and Rofin Integral). The results of technological tests were verified by the metallographic evaluation of joints. Performance tests when powered by biogas were conducted for selected variants of welding.
The study reported here is part of a larger research project on laser-beam welding conducted at the Centre for Laser Technologies of Metals. The primary objectives were to compare laser-beam welding with a conventional process when used for longitudinal seams in street lamp posts, to select the process parameters for girth welds in cylindrical high-strength steel machine elements, and to assess whether laser-beam welding can be used for magnesium alloys. The paper includes recommendations for the selection of welding parameters.
In modern machines for realization of goals like lubrication intesyfication, heat flow intensyfiacation, microflow simulation; more and more often surface texturing is used. It became possible due to develepment of technologies that use sources of concentrated energy stream like microlasers. The paper shows results of experimental investigation on seal rings made of silicon carbide. Experiments were conducted using seal rings without surface modifications and a seal rings with a geometrical surface textures made with Nd:Yag laser.