The effect of laser welding on prevention of the fracture of cracked shafts of a high carbon steel are presented. Static tensile strength and rotary bending fatigue strength were obtained using shaft specimens of AISI W1 which were welded by a CO2 laser around a precrack. Since the welded region became extremely hard and brittle, both the strengths of laser-welded specimens were lower than those of non-welded specimens. However, the strengths were increased higher than those of non-welded specimens after tempering the specimens. It was found that when tempered at 600°C after laser welding, the rotary bending fatigue strength of specimens with a crack smaller than 12 mm rose similar to that of the base metal, and when tempered at 700° C, the static tensile strength of specimens with a crack smaller than 12mm rose similar to that of the base metal. Therefore, it was shown that the laser welding is very effective to prevent fracture of high carbon steels.
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October 1988
Research Papers
Prevention of Fracture of Cracked Steel Bars Using Laser: Part III—Case of High Carbon Steel
Akira Kato
Akira Kato
Department of Mechanical Engineering, Chubu University, Kasugai, Aichi 487, Japan
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Akira Kato
Department of Mechanical Engineering, Chubu University, Kasugai, Aichi 487, Japan
J. Eng. Mater. Technol. Oct 1988, 110(4): 319-324 (6 pages)
Published Online: October 1, 1988
Article history
Received:
May 18, 1987
Online:
October 22, 2009
Citation
Kato, A. (October 1, 1988). "Prevention of Fracture of Cracked Steel Bars Using Laser: Part III—Case of High Carbon Steel." ASME. J. Eng. Mater. Technol. October 1988; 110(4): 319–324. https://doi.org/10.1115/1.3226056
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