The slowed down destruction and parameters of the estimation of technological strength of welded connections from high-strength steels, working at low temperatures

In work the factors influencing on weldability of high-strength low-alloy steels are revealed and requirements to properties of the welded connections intended for work at low temperatures are developed. The technique of estimation the technological strength of welded connections of slowed down destruction on samples-inserts is presented at stationary and adaptive-pulse welding with the help of acoustic-emission diagnosis method and fractographic researches. It is shown, that set of parameters of acoustic emission can serve as criteria of structural condition and basis of not destroying method of estimation the strength properties of welded connection.