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Low hydrogen material covered electrode

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专利汇可以提供Low hydrogen material covered electrode专利检索,专利查询,专利分析的服务。并且PURPOSE: To improve the moisture absorption resistance of an electrode and the crack resistance of a weld zone by regulating the value of the average roughness Ra of the center line on the covered surface in the specified range.
CONSTITUTION: The raw material of good wettability is used for the covered flux forming the covered surface of the low hydrogen material covered electrode for arc welding, which i made to be of the particle size structure close to the closest packing as well, moreover, the kneading conditions, coating pressure, drying speed, etc., are adjusted and the center line average roughness Ra on the covered surface is regulated in 3.0W6.5μm. A good correlation exists on the surface roughness to the amt. of the absorbed moisture of an electrode. The increasing trend of a moisture absorption amt. is lenient in case of Ra being 3.0μm min 6.5μm max but increased rapidly if exceeding 6.5μm. A coating crack is caused with Ra being ≤3.0μm. With this method the moisture absorp tion resistance of an electrode can be improved with preventing the generation of a coating crack. Moreover, the crack resistance of a weld zone is improved with the improvement of the moisture absorption resistance. This electrode is taken as the low hydrogen material covered electrode for arc welding stipulat ed for in JIS B0601.
COPYRIGHT: (C)1988,JPO&Japio,下面是Low hydrogen material covered electrode专利的具体信息内容。

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