本文介绍了一批钢质压力容器在焊接加工后发观的白点断口现象,经过对所采用的钢板、焊接接头、熔敷金属和焊条进行了大量地化学成分,无损探伤(超声波探伤、X射线探伤)和有械性能试验,初步找出发生白点断口的原因是焊条质量不稳定,焊条烘干不够,焊后冷速太快所造成,总结出予防白点断口的措施,保证了产品质量和用户使用安全。 This paper introduces the phenomenon of white point fracture of a group of steel pressure vessels after welding. After a large amount of chemical composition, non-destructive flaw detection (ultrasonic flaw detection, X Ray tracing) and mechanical properties test, preliminary find out the reason of white point fracture is unstable electrode quality, electrode drying is not enough, the cooling speed is too fast after welding, summed up to prevent white point fracture measures to ensure that the product Quality and user safety.