We have developed a new method of improving the fatigue strength of the steel wire for automobile. Principle of the new method is thin surface layer annealing of the wire by using the high power density zone of the focused laser beam in the cone shaped focusing mirror. In this method, the laser beam was coaxially irradiated and focused on the wire the anneal it uniformly. Using this laser processing technique, up to 3μm depth of uniform annealing has been realized, which results in four times increase in fatigue strength of the wire without degrading the tensile strength. No defect was observed on the annealed surface of the wire. It should be possible to realize the effective manufacturing process of high performance steel wires using this method.
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ICALEO '90: Proceedings of the Laser Materials Processing Conference
November 4–9, 1990
Boston, Massachusetts, USA
ISBN:
978-0-912035-42-0
PROCEEDINGS PAPER
Surface annealing of steel wires for automotive tires by CO2 laser with cone shaped focusing mirror
K. Minamida;
K. Minamida
Applied Electronics Laboratory Electronics R & D Laboratories, Central R & D Bureau Nippon Steel Corporation
5-10-1 Fuchinobe, Sagamihara Kanagawa 229, Japan
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M. Kido;
M. Kido
Applied Electronics Laboratory Electronics R & D Laboratories, Central R & D Bureau Nippon Steel Corporation
5-10-1 Fuchinobe, Sagamihara Kanagawa 229, Japan
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A. Ishibashi;
A. Ishibashi
Applied Electronics Laboratory Electronics R & D Laboratories, Central R & D Bureau Nippon Steel Corporation
5-10-1 Fuchinobe, Sagamihara Kanagawa 229, Japan
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S. Mogami;
S. Mogami
Applied Electronics Laboratory Electronics R & D Laboratories, Central R & D Bureau Nippon Steel Corporation
5-10-1 Fuchinobe, Sagamihara Kanagawa 229, Japan
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S. Sasaki
S. Sasaki
Applied Electronics Laboratory Electronics R & D Laboratories, Central R & D Bureau Nippon Steel Corporation
5-10-1 Fuchinobe, Sagamihara Kanagawa 229, Japan
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Published Online:
November 01 1990
Citation
K. Minamida, M. Kido, A. Ishibashi, S. Mogami, S. Sasaki; November 4–9, 1990. "Surface annealing of steel wires for automotive tires by CO2 laser with cone shaped focusing mirror." Proceedings of the ICALEO '90: Proceedings of the Laser Materials Processing Conference. ICALEO '90: Proceedings of the Laser Materials Processing Conference. Boston, Massachusetts, USA. (pp. pp. 460-468). ASME. https://doi.org/10.2351/1.5058389
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