On the Chemical Composition of Non-Metallic Inclusions in Ultra-Clean Gear Steels

IF 0.3 Q4 THERMODYNAMICS HTM-Journal of Heat Treatment and Materials Pub Date : 2022-04-01 DOI:10.1515/htm-2022-1004

D. Fuchs, D. Kohlschmid, T. Tobie, K. Stahl

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引用次数: 2

Abstract

Abstract Fisheye failures due to non-metallic inclusions can lead to the reduced endurance fatigue limit of case-hardened, shot-peened gears. Various approaches for preventing crack initiation at non-metallic inclusions are conceivable. As one approach, steel manufacturers have invested much effort in the steelmaking process to produce ultra-clean gear steels. Such ultra-clean gear steels were investigated in a gear research project. For each steel batch, different measures were taken during steel production to avoid or bind off non-metallic inclusions in order to reduce or even suppress the harmful effect of the non-metallic inclusions. However, the influence of the measures taken on the chemical composition of non-metallic inclusions in such ultra-clean gear steels is not investigated in the gear industry in detail so far. Therefore, in the framework of this publication, the chemical composition of non-metallic inclusions in ultra-clean gear steels is investigated. Furthermore, a comparison of the chemical analysis with the crack-initiating inclusions from the experimental investigations is performed.

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超净齿轮钢中非金属夹杂物的化学成分研究

非金属夹杂物引起的鱼眼失效会导致淬硬、喷丸齿轮的疲劳极限降低。防止非金属夹杂物裂纹萌生的各种方法是可以想象的。作为一种方法，钢铁制造商在炼钢过程中投入了大量精力来生产超清洁齿轮钢。在某齿轮研究项目中对这种超净齿轮钢进行了研究。针对每一批钢，在生产过程中采取了不同的措施来避免或粘合非金属夹杂物，以减少甚至抑制非金属夹杂物的有害影响。然而，迄今为止，在齿轮工业中尚未详细研究所采取的措施对此类超净齿轮钢中非金属夹杂物化学成分的影响。因此，在本出版物的框架内，研究了超净齿轮钢中非金属夹杂物的化学成分。此外，还将化学分析结果与实验结果进行了比较。

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