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标 题： Comparison between the hydrogen embrittlement behavior of an industrial and a lightweight bearing steel
工业轴承钢与轻质轴承钢氢脆行为的比较
作 者： Margot Pinson
Ksenija Nikolic
Hauke Springer
Tom Depover
Kim Verbeken
关键词： Bearing steel  [轴承钢]
Hydrogen embrittlement  [ 氢脆]
In-situ bending test  [ 原位弯曲试验]
Martensitic steel  [ 马氏体钢]
Sustainability  [ 可持续性]
出版年： 2022
文集名： 23rd European Conference on Fracture (ECF23)
第23届欧洲断裂会议（ECF23）
会议名： 23rd European Conference on Fracture (ECF23)
第23届欧洲断裂会议（ECF23）
届 次： 23rd
摘 要： Hydrogen embrittlement (HE) is a widely occurring problem, also in the automotive industry. Therefore, this study compares the resistance to HE of two types of bearing steels: an industrial 100Cr6 steel and an innovative Fe-8A1-1.1C steel. The innovative character of the Fe-8Al-1.1C steel is found in the fact that a high weight fraction of Al is added to a simplified Fe-1.1C alloy which results in a low-cost martensitic steel with a similar hardness but a lower density, compared to the industrial 100Cr6 steel. The density reduction offers the opportunity to reduce the vehicle weight and as such to reduce the CO_2 emission of fuel-based cars or extend the driving range of electrical vehicles. Both alloys are subjected to a similar heat treatment resulting in a martensitic matrix with specially induced carbides. (In-situ) H bending tests and subsequent post-mortem fracture surface analysis are performed to investigate the mechanical degradation of both steels in a H rich environment. For the industrial steel grade, the large Cr-based carbides act as fracture initiation sites for H-assisted cracks. In contrast, the fracture behavior of the Fe-8Al-1.1C material is similar in air and in an H containing environment, indicating that the Fe-8Al-1.1C steel has a better resistance to HE. Although these results are very promising, further optimization of the innovative alloy is needed to improve the mechanical behavior in the absence of H since the presence of microcracks cause premature failure when tested in air.

氢脆（HE）是一种广泛存在的问题，汽车工业中也不例外。因此，本研究比较了两种轴承钢的抗氢脆性能：一种是工业用100Cr6钢，另一种是新型Fe-8Al-1.1C钢。新型Fe-8Al-1.1C钢的特点在于，在简化型Fe-1.1C合金中添加了较高含量的铝，从而制得了一种成本较低的马氏体钢，其硬度与工业级100Cr6钢相近，但密度更低。密度的降低有助于减轻车辆重量，进而减少燃油车的二氧化碳排放，或延长电动汽车的续航里程。两种合金均经过相似的热处理工艺，形成具有特殊诱导碳化物的马氏体基体。（原位）H弯曲试验及随后的断口表面分析，用于研究这两种钢材在富含氢环境下的力学性能退化情况。对于工业级钢，大量以铬为主的碳化物作为氢辅助裂纹的起始点。相比之下，Fe-8Al-1.1C材料在空气和含氢环境中表现出相似的断裂行为，表明该Fe-8Al-1.1C钢对氢脆具有更好的抵抗能力。尽管这些结果非常有希望，但为了在无氢条件下进一步改善机械性能，仍需对这种新型合金进行优化，因为当在空气中测试时，微裂纹的存在会导致过早失效。
中文内容为网络AI翻译，专业术语未必准确，仅供参考。

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