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Schmiermechanismus von C‐MoS 2 ‐Fe 2 O 3 (Fe 3 O 4 ) Nanokomposit‐Schmiermitteln an den Reibflächen von kupferfrei‐beschichtetem Volldraht gegen den Kontaktschlauch
Author(s) -
Li Z.X.,
Wan Q.,
Li G.D.,
Li H.,
Li H.J.,
Zhang T.L.,
Kim H.J.,
Tillmann W.
Publication year - 2019
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.201700228
Subject(s) - materials science , rubbing , graphite , tribology , composite material , abrasive , lubrication , dry lubricant , tube (container) , composite number , welding , metallurgy , cold welding , coating , gas metal arc welding , arc welding
Graphite‐MoS 2 ‐Fe 2 O 3 (Fe 3 O 4 ) nano‐composite lubricating coatings were prepared on the surfaces of non‐copper coated solid wires by a mechanical coating technique. The tribological behaviours of graphite‐MoS 2 ‐Fe 2 O 3 (Fe 3 O 4 ) coatings at the rubbing interfaces of welding wires against the contact tube were investigated. The results demonstrate that the lubricating properties of graphite‐Fe 3 O 4 coatings outperform the lubricating properties of graphite‐Fe 2 O 3 coatings. The anti‐wear performance of the contact tube is strengthened with increasing nano‐MoS 2 contents. Layers of protective tribofilms are formed at the rubbing interfaces of welding wires against a contact tube by tribochemical reaction among lubricants. The tribofilms are composed of FeO, MoO 3 and FeMoO 4 with excellent lubricating properties. They can avoid direct contact of welding wires against the contact tube, thus decreasing contact tube wear. With the transition of the contact tube wear from mild to severe, the dominant wear mechanisms of contact tube change from fatigue peeling and oxidative wear to abrasive wear and arc ablation.