What is the History of the Welding Process? What are Welding Methods? What are the Types of Welding and Advantage of Welding? What Is Welding By heating two or more surfaces to a melting point, welding joins two or more pieces of metal or thermoplastic. Typically, this process involves applying heat and pressure to the surfaces being joined, causing the materials to melt and fuse. History of the Welding History of Welding Method/Process · Earliest stage of welding is known as forge welding · 16th century - Soldering process used for brazing silver and copper · 18th century - Gas welding and Arc welding · 19th century - Fusion welding, Metal electrode welding and Carbon arc welding. · 20th century - Electric arc welding Several new...
How DP Test Works??? Dye Penetrant Examination is commonly used for weld components. In this technique low viscosity liquids are allowed to penetrate in the surface openings and after penetration, liquid is made to extract out again by means of some developers. That is why it is also known as Liquid Penetrant Examination for the evaluation of weldment. The examination includes five steps · Cleaning · Introducing Penetrant · Penetrant Removal · Introducing Developer · Examination Cleaning: - To start, the test surface is need to be cleaned with the help of wire brush or some old cloth using a suitable. cleaner. The surface must be cleaned from organic compounds (oil and grease), dust, scale and other pollutants because an even su...