Causes of weld porosity in electroformed nickel
Causes of weld porosity in electroformed nickel
复制标题
DOI：
--
复制
发表时间：
1979-12
期刊：
影响因子：
--
通讯作者：
J. Brooks;J. Dini;H. R. Johnson
中科院分区：
文献类型：
--
作者：
J. Brooks;J. Dini;H. R. Johnson
热重分析提供的信息与钨极气体保护焊的研究相结合，以确定电铸镍焊缝气孔的原因。当C和O都不超过约。40 ppM，N约为。在存款中的浓度为80 ppM或更低时，在焊接后没有观察到孔隙。将C和O增加到60至70 ppM，将N增加到100 ppM，导致焊接样品中出现明显的孔隙。热重分析表明，孔隙可能是由N/sub 2/和/或C + O结合形成CO和CO/sub 2/所致。也有迹象表明，SO/sub 2/有助于孔隙度。
Information provided by thermogravimetric analysis was coupled with studies of gas tungsten arc welds to determine the causes of weld porosity in electroformed nickel. When both C and O did not exceed approx. 40 ppM and N was approx. 80 ppM or less in the deposit, no porosity was observed following welding. Increasing the C and O to 60 to 70 ppM and N to 100 ppM resulted in significant porosity in welded samples. Thermogravimetric analysis indicated that the porosity could result from N/sub 2/ and/or C plus O combining to form CO and CO/sub 2/. There were also indications that SO/sub 2/ contributed to the porosity.