A model approach for considering nonmetallic inclusions in the calculation of the local tooth root load-carrying capacity of high-strength gears made of high-quality steels. (November 2019)

• Record Type: Journal Article
• Authors: Fuchs, D; Schurer, S; Tobie, T; Stahl, K
• Other Names: Dooner David guest-editor.; Kahraman Ahmet guest-editor.; Theodossiades Stephanos guest-editor.; Velex Philippe guest-editor.
• Is Part Of: Proceedings of the Institution of Mechanical Engineers. Volume 233:Number 21/22(2019)
• Page Start: 7309
• Page End: 7317
• Publication Date: 2019-11
• Subjects: Tooth root bending strength -- high-strength gears -- degree of cleanliness -- degree of purity -- nonmetallic inclusions -- shot peened -- case-hardened -- theoretical approach of Murakami -- √area; Mechanical engineering -- Periodicals; 621.05
• DOI: 10.1177/0954406219840676
• Languages: English
• ISSNs: 0954-4062

Abstract

Demands for higher performance have caused a need for improved component characteristics, e.g. through surface strengthening of gears and increased cleanliness of gear steels. Unfortunately, a resultant drawback is that cracks in such high-strength gears are more often initiated in the material matrix at nonmetallic inclusions and not at the surface. In standardized calculation methods, the degree of cleanliness of steels is not yet directly correlated to the tooth root load-carrying capacity. This paper considers the effects of nonmetallic inclusions in the steel matrix on the tooth root strength based on the theoretical approach of Murakami.