介绍低合金高强度钢压力容器焊接过程和焊后常出现的缺陷，分析其产生的因素，并从焊接前准备、焊接过程、焊接后检验三个方面对低合金......

Micro-alloying of Mg,ranged from 30 to 70 ppm,may improve the high temperatureductility,stress rupture,especially,certai......