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Development of High Fatigue-Resistance Steel Wires for Engine Valve Springs
Published October 04, 1994 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Autumn Conference
Market demand for reducing weight and size in engine valve springs requires a higher anti-fatigue property in steel wires for the springs. High strength materials are necessary to meet the demand. However, resistance to flaw becomes lower with increasing strength. Thus, micro flaws that are not harmful on conventional materials act as starting points for fatigue fracture and prevent improving the anti-fatigue properly.
We have succeeded in removing harmful micro flaws with electropolishing and obtained steel wires having a dramatically improved anti-fatigue properties.