Effect of steel structure and defects on reliability of parts of impact mechanisms

Geodynamics and Stress State of the Earth's Interior 2017

Popelyukh, A.I.^1 ; Repin, A.A.^2 ; Alekseev, S.E.^2

Novosibirsk State Technical University, Novosibirsk, Russia^1

Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia^2

关键词: Fatigue strength;    Ferrite-pearlite structure;    High reliability;    Impact mechanism;    Material control;    Multicomponents;    Non-metallic inclusions;    Selection of materials;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/134/1/012045/pdf
DOI  :  10.1088/1755-1315/134/1/012045

来源: IOP

【 摘 要 】

The paper discusses selection of materials suitable for manufacturing critical parts of impact mechanisms. It is shown that in order to extend life of parts exposed to high dynamic loading, it is expedient to use medium- and high-carbon alloy-treated steels featuring low impurity with nonmetallic inclusions and high hardening characteristics. Application of thermally untreated parts is undesirable as steel having ferrite-pearlite structure possesses low fatigue strength. Aimed to ensure high reliability of parts with a hardness of 42-55 HRC, steel should be reinforced by thermal treatement with the formation of multicomponent martensite-bainite structure. High-quality production should include defectoscopy and incoming material control.