ISO 3690:2018 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 3690:2018

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：2018-07

标准范围

本文件规定了用于测定马氏体、贝氏体和铁素体钢焊缝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材料的电弧焊工艺焊接的。本文件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。注:关于使用甘油的旧测量方法的建议和限制，附录B中给出了与这些旧方法的任何比较工作。

This document 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 material.The techniques specified in this document 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.NOTE Recommendations and restrictions in regard to older methods of measurement using glycerine are given in Annex B for any comparison work to these older methods.

标准预览图