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Assessment of Critical Hydrogen Concentration in As‐Cast and Hot‐Rolled Billets in Medium Carbon Steels
Steel Research International ( IF 1.9 ) Pub Date : 2020-06-16 , DOI: 10.1002/srin.202000126
Valentina Colla 1 , Renzo Valentini 2
Affiliation  

The presence of hydrogen severely affects the mechanical properties of semi‐manufactured and final steel products. Such presence is affected by different factors which show up throughout the whole manufacturing process and varies during the different stages according to both product features and various process parameters. This article presents an experimental methodology to assess the critical hydrogen concentration in as‐cast and hot‐rolled billets in medium carbon steels, which allows highlighting their robustness to hydrogen embrittlement. Such approach is based on a combination of hydrogen‐induced cracking and slow strain rate tensile tests, which are conducted on both as‐cast and hot‐rolled billets samples. The experiments highlight that the hydrogen presence is more critical on the as‐cast semi‐products than on the hot‐rolled billets, which show a higher robustness, as they can tolerate higher values of hydrogen content.

中文翻译:

中碳钢铸坯和热轧坯料中的临界氢浓度评估

氢的存在严重影响了半成品和成品钢的机械性能。这种存在受到整个制造过程中显示的不同因素的影响,并且在不同阶段根据产品功能和各种工艺参数而变化。本文介绍了一种实验方法,用于评估中碳钢的铸轧和热轧坯料中的临界氢浓度,从而突出了其对氢脆的鲁棒性。这种方法是基于氢致裂纹和慢应变速率拉伸试验的组合,对铸坯和热轧坯料样品均进行了试验。实验表明,氢的存在对铸态半成品比在热轧坯料上更为关键,
更新日期:2020-06-16
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