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Effects of Material Properties and Initial Stresses on the Durability of Cast Iron Cylinder Heads
Technical Paper
871204
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English
Abstract
Thermal fatigue tests were conducted to find how material properties, operating temperature and initial mechanical stress caused by press fitting of valve seat inserts etc. influence on thermal fatigue cracks of cast iron cylinder heads by means of a simulation test at mainly 100°C. = 350°C cycles.
These tests revealed that the reduction in initial stresses and improvement of tensile strength of material at room temperature are very effective to improve thermal fatigue resistance.
And a new cast iron cylinder head material with high thermal fatigue resistance for heavy duty diesel engines has been successfully developed, utilizing the results of casting experiments by means of experiment design, L16(2[ILLEGIBLE]).
High reliability of new cast iron cylinder heads has been confirmed by accelerated durability bench tests.
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Authors
Citation
Kanazawa, T., "Effects of Material Properties and Initial Stresses on the Durability of Cast Iron Cylinder Heads," SAE Technical Paper 871204, 1987.Also In
References
- Cundlach R.B. “Elevated-Temperature Properties of Alloyed Gray Irons for diesel Engine Components” 1978 AFS Transactions
- Roehrig K. “Thermal Fatigue of Gray and Ductile Irons” 1978 AFS Transactions
- Nechtelberger E. “Gusseisenwerkstoffe - Eigenshaften unlegierter und niedriglegieter Gusseisen mit Lanellengrapit/Kugelgraphit/Vermiculargraphit im Temperaturbereich bis 500°C” Herausgegeben von der Forshungsvereinigung fur Verbrennungskraftmaschinen e.V. Main 1977