Butt welding of steel and nickel alloys pipes using low pressure arc in power machinery construction

摘要

The joints forming features of pipes from steels and nickel alloys at butt welding using pipes faces heating with electric arc in inert medium of low pressure as applied to power machinery construction tasks are considered. The macro- and microstructure of welded joints features and investigations results of mechanical properties and working capacity of welded joints from steels and nickel alloys used for production of heat-changing equipment in high-temperature gas reactor with helium heat carrier are given. Technological methods providing optimal faces melting of the steel and nickel alloy tubes and finless joints are proposed.