Ziel
The production of cold formed high strength fasteners with yield strengths greater than 600 N/mm² currently necessitates a hardening and tempering operation being carried out on the formed component. Significant cost savings would be achieved if this heat treatment could be eliminated and, in principle, this would be possible by the development of an initial bar or rod microstructure which could be strengthened by a combination of drawing and cold forming, with the final properties produced by a low temperature stress relief operation. Whilst this approach has already been considered for a limited range of steel types and component shapes in both Japan and Europe, there is urgent need for a systematic study to establish the optimum composition and microstructure for a given component strength level in various size ranges. The behaviour of the final product also requires assessment to demonstrate that the bolt properties obtained without heat treatment are acceptable.
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CSC - Cost-sharing contractsKoordinator
S60 3AR ROTHERHAM
Vereinigtes Königreich