Вплив структури різних зон поздовжніх зварних з’єднань труб на параметри сигналів магнетопружної акустичної емісії

摘要

The microstructure of the steel 19H of oil pipes after long-term exploitation is investigated.Conformity to law of change of parameters of signals of magnetoelastic acoustic emission from the structure of the different zones of the weld joint is set. Influence of remaining stress after welding on the change of sum of the amplitudes of the signals of magnetoelastic acoustic emission is investigated.