Change search
ReferencesLink to record
Permanent link

Direct link
Distortion Analysis of Low Pressure Carburized Components: A heat treatment distortion comparison of transmission gear components for truck and automobile.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
2016 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

During the last 10 years, low pressure carburizing and high pressure gas quenching has become more popular since it is a “new” process and researchers reports that the distortion characteristics gained from these processes is improved in relation to conventional processes.

The aim of this work was to investigate the distortions gained from three different heat treatment processes on main shaft gears and crown wheels. Experiments with atmospheric carburization with oil quenching and low pressure carburization with nitrogen gas quenching or oil quenching were made and distortion characteristics gained from these processes were then measured and compared.

It was found that components treaded in the relatively new LPC-HPGQ process are similar and often even better than the conventional method. The larger main shaft gear improves the most with newer method but instead gets a lower core hardness and systematic diametrical shrinkage. Some measurements on the crown wheel were also improved but others were affected negatively.

Place, publisher, year, edition, pages
2016. , 45 p.
Keyword [en]
Low pressure carburization, high pressure gas quenching, oil quenching, distortion, shape change, gear wheel, crown wheel, truck, automobile
National Category
Materials Engineering
URN: urn:nbn:se:kth:diva-193539OAI: diva2:1015017
External cooperation
Swerea IVF; Scania CV AB; GKN Driveline; Bodycote Värmebehandlingar AB
Subject / course
Physical Metallurgy
Educational program
Master of Science in Engineering - Materials Design and Engineering
2016-06-16, Scania, Södertälje, 10:00 (Swedish)
Available from: 2016-10-04 Created: 2016-10-03 Last updated: 2016-10-04Bibliographically approved

Open Access in DiVA

Distortion Analysis of Low Pressure Carburized Components(5256 kB)5 downloads
File information
File name FULLTEXT01.pdfFile size 5256 kBChecksum SHA-512
Type fulltextMimetype application/pdf

By organisation
Materials Science and Engineering
Materials Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 5 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

ReferencesLink to record
Permanent link

Direct link