STEEL FOR HIGH-CLEANLINESS SPRINGS EXCELLENT IN FATIGUE CHARACTERISTICS AND HIGH-CLEANLINESS SPRINGS
摘要
<p>The invention provides a high-Si, high-cleanliness spring steel useful for the production of springs excellent in fatigue characteristics. The steel for high-cleanliness springs excellent in fatigue characteristics is characterized by containing by mass C: 1.2% or below (exclusive of 0%), Si: 1.8 to 4%, Mn: 0.1 to 2.0%, and total Al: 0.01% or below (exclusive of 0%) with the balance consisting of Fe and unavoidable impurities and by satisfying the relationship (1): Six10-7 = solid-soluted (SIMS) Ca = Six5x10-7 wherein solid-soluted (SIMS) Ca and Si are their respective contents (% by mass) in steel.</p>
