Short-term and long-term properties of welds of thick-walled tubes of 15Kh1M1F steels performed by electron beam welding

The structure, short-term and long-term properties of basic metal and welded joints of tubes 325x60 mm of the steel 15Kh1M1F, obtained by means of electron beam welding, have been studied. Heat treatment regimes are determined. It is shown that the recommended regime of heat treatment (tempering at the temperature 1023 K+-10 K, exposure for 5 hr) ensures the required level of short-term, long-term strength and plastic properties