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某厂在生产小直径压力容器时,终接环缝采用了带衬垫的单面手工电弧焊工艺。坡口型式及其尺寸如图1所示。在焊后的X光底片上发现,靠近根部熔合线处出现断断续续的黑点或黑带,降低了产品合格率。
A factory in the production of small diameter pressure vessel, the termination ring gap with a padded single-sided manual arc welding process. Groove type and size shown in Figure 1. In the post-welding X-ray film found near the root fusion line intermittent black spots or black belt, reducing the product pass rate.