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ban zi dong mai hu han zai fa men zhi zao zhong de ying yong
Author(s): 
Pages: 21-22
Year: Issue:  4
Journal: Valve

Abstract: 1 问题的提出我厂在试制电站阀门Z960Y250175、225时,因阀体与阀座的连接焊通道小而深,用手弧焊时,焊条无法达到坡口根部(图1、表1)。焊接时易出现未焊透、咬边、夹渣、气孔甚至裂纹。焊条约有1/3无法使用,消耗量大,焊接接头多,焊条更换频繁,焊接效率低,质量不易保证。...
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