Influence of ambient humidity on weld delayed crack of Cu-age-hardening steel;

This trifurcated connector is with the features of optimized welding process and thermal process can avoid bigger delay crack and constrain stress.

The result showed that the crack of feed-water pipe saddle was a delayed crack,because welding procedure code didn\'t control well,carbon equivalent of welding components have obvious quench trend and welding didn\'t avoiding hydrogen treatment,welding structure and larger thickness of welding components occured constrain stress etc.

Metal magnetic memory signal recognition by neural network for welding crack;

Available time and dubious zone size of welding crack by metal magnetic memory method;

Remedy and analysis of welding crack for cone-shaped variant section of thick wall pressure vessel on Q345·C;

Feature extraction of metal magnetic memory signal and its application for weld crack;

Reason and control countermeasure of the weld crack happened to the bulletproof steel plate of the naval ship;

Analysis on the weld crack in construction survey of the 3 000 t river-to-sea cargo ship;

Investigation on relationship between welding cracks stress and magnetic memory signal;

Analysis of the formation and characteristics of the TIG welding cracks for the AZ31B magnesium alloy;

According to many on the spot working tests,the characteristics,formation reasons,influence factors,technological methods and countermeasures of the pipeline welding cracks were analyzed.