Measurements of Diffusible Hydrogen Contents at Elevated Temperatures using Different Hot Extraction Techniques — An International Round Robin Test
Measurements of Diffusible Hydrogen Contents at Elevated Temperatures using Different Hot Extraction Techniques — An International Round Robin Test
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使用不同热萃取技术测量高温下的扩散氢含量 - 国际循环测试
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发表时间：
2010
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通讯作者：
Nico Tiersch
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作者：
T. Kannengiesser;Nico Tiersch
这项国际循环试验用于仔细审查ISO/DIS 3690：2009中规定的确定体心立方晶格结构焊缝金属中可扩散氢含量的程序。它的具体目的是检查样品制备、储存和氢分析的指定标准中定义的规范在哪些方面提供了可比的测量结果。介绍了循环测试，包括使用热提取技术和热导检测器(TCD)在不同脱气温度下的比较测量。这项研究的一个主要焦点是考察了分析bcc晶格结构材料中可扩散氢的最高脱气温度。使用两种不同的棒状电极和三种不同的填充丝进行分析。一个显著的结果是，在所研究的脱气温度范围内，在45°C到400°C的范围内，所测得的可扩散氢的含量没有偏差或增加，对于HD=1.5ml/100g以下的氢含量的分析，与本研究中采用的热萃取技术和TCD相结合，导致了相当大的相对标准偏差。
This international round robin test served to scrutinize the procedures specified in ISO/DIS 3690:2009 for determining the diffusible hydrogen content in weld metals with bcc-lattice structure. It was specifically intended to check in what respect the specifications defined in the indicated standards for specimen preparation, storage and hydrogen analysis provide comparable measurement results. The round robin test is presented comprising comparative measurements at various degassing temperatures using hot extraction techniques and a thermal conductivity detector (TCD). A major focus of this investigation was the examination of the maximum degassing temperature for analysing the diffusible hydrogen in materials with bcc-lattice structure. The analyses were performed using two different stick electrodes and three different filler wires. As a significant result it was found that no deviations or increases, were detected in the measured contents of diffusible hydrogen for the investigated degassing temperatures ranging between 45 °C and 400 °C. Hydrogen analyses for contents below HD = 1.5 ml/100 g with the hot extraction techniques in conjunction with TCD applied in this study led to considerable relative standard deviations.