Component strength of heat-treated sintered steels

  Copyright: IWM  

Motivation

The overall objective of the project is the development of a calculation concept for component design for the material group of sintered steels. The calculation concept should make it possible to include sintered steels as a material group in the FKM guideline "Computational strength verification for machine components". For this purpose, data on the fatigue strength characteristics of sintered steels will be compiled in a comprehensive literature search. General relationships (e.g. between density, hardness, highly loaded volume and vibration resistance) are derived from this database.

As a basis for the calculation a reference fatigue strength is to be established which can be estimated from a simple hardness measurement. Extensive vibration tests are carried out to supplement the existing database with vibration strengths of heat-treated sintered steels.

The developed design methodology is verified by component tests.

Subgoals

• Derivation of correlations from literature data
• Development of an estimation method for a reference fatigue strength
  • Correlation: density à hardness à vibration resistance
• Development of a static strength verification
• Experimental determination of the fatigue strength of heat treated sintered steels as a function of density, stress ratio and highly loaded volume (HBV90)
• Transfer of the parameters into the framework of the FKM guideline
• Validation of the method by component tests

Project partners

• Fraunhofer LBF Darmstadt

Project Funding

• AiF

Research Association

• Research Board of Trustees in Mechanical Engineering FKM