Investigation of pitting resistance in ultra clean IQ-Steel vs commonly used conventional steel; 158Q vs 16MnCr5: Back-to-back pitting tests
2015 (English)Report (Other academic)
KTH Machine Design has conducted pitting tests on gears made out of two different types of steel in a standard back-to-back pitting test rig (FZG). The tested gears were produced from Ovako’s IQ-Steel in grade 158Q and compared to the behaviour of a reference steel, commonly used conventional steel in grade 16MnCr5 (reference steel, RS). The test method is a mechanical test procedure generally used to determine the pitting load capacity of gear transmission lubricants, but in this study the purpose was to compare the pitting load capacity of the two steel types. The report is based on the test procedure described in FVA – Information sheet Research Project No. 371 (Practice Relevant Pitting Test) with minor changes. Time to failure and photographs of the fatigue damages are presented in this report. One gear tooth from each steel type was analysed using SEM. The results, which are based on six tests in total (three gear pairs IQ-Steel and three RS-steel), indicate that the IQ-Steel has better surface durability than the reference steel. To better understand the mechanisms involved, further tests are suggested.
Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2015. , 18 p.
TRITA-MMK, ISSN 1400-1179 ; 2015:07
gear, surface fatigue, FZG, pitting, steel
Tribology Other Mechanical Engineering
Research subject Machine Design
IdentifiersURN: urn:nbn:se:kth:diva-175449ISBN: 978-91-7595- 730-2OAI: oai:DiVA.org:kth-175449DiVA: diva2:861094
QC 201510152015-10-152015-10-152015-10-15Bibliographically approved