25-27 April 2022
Conventum Conference Center
Europe/Vienna timezone

Effect of cleanliness on fatigue resistance of PM-HSS

26 Apr 2022, 16:30
20m
Room 2

Room 2

Oral Presentation High speed steels Fatigue under Mechanical & Thermal Cyclic Loads

Speaker

Stefan Sundin (Eratseel Kloster AB)

Description

Powder metallurgy (PM) high speed steels have traditionally been used for tools but are gaining increased usage for demanding components such as rings in bearings and fuel injection. These components, but also many of the tools, are under cyclic load, sometimes several millions of cycles. For that reason, the fatigue resistance of PM-HSS (HSS) is one of the most important mechanical properties. Data and basic knowledge of fatigue resistance of PM-HSS is scarce in the open literature and this is today an obstacle for gaining more usage of PM-HSS in critical applications outside its traditional usage.
In this study we have looked at the influence from cleanliness, amount and size of non-metallic inclusions, and hardness on the tensile pull-pull fatigue resistance of PM-HSS. Results shows that high cleanliness can results in up to 50% higher fatigue strength. A novel part of the study includes the influence from voids typically surrounding non-metallic inclusions.

Speaker Country Sweden

Primary authors

Stefan Sundin (Eratseel Kloster AB) Mr Nicklas Reis (Eratseel Kloster AB)

Presentation Materials

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