ISO 3690:2012 焊接及相关工艺方法 电弧焊金属中氢含量的测定

标准编号：ISO 3690:2012

中文名称：焊接及相关工艺方法 电弧焊金属中氢含量的测定

英文名称：Welding and allied processes — Determination of hydrogen content in arc weld metal

发布日期：2012-03

标准范围

ISO 3690:2011规定了用于测定马氏体、贝氏体和铁素体钢焊接金属中扩散氢的取样和分析程序，这些焊接金属是通过使用填充金属的弧焊工艺焊接此类钢而产生的。ISO 3690:2011中规定的技术包括通过置换汞收集可扩散氢，或收集到充满惰性气体（如氩气）的顶空中。收集的氢气量通过测量前者的置换体积和后者的导热系数来确定。控制可扩散氢的收集温度，以避免非扩散氢的热激活。

ISO 3690:2011 specifies the sampling and analytical procedure for the determination of diffusible hydrogen in martensitic, bainitic, and ferritic steel weld metal arising from the welding of such steels using arc welding processes with filler metal.The techniques specified in ISO 3690:2011 include collection of diffusible hydrogen via displacement of mercury or collection into a headspace filled with an inert gas such as argon. The amount of hydrogen collected is determined by measuring the displaced volume in the former and by, for example, thermal conductivity in the latter.The temperature for collection of diffusible hydrogen is controlled to avoid thermal activation of non-diffusible hydrogen.

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