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ROLLED WIRE ROLL FOR HARDENED SPRINGS, DRAWN WIRE FOR HARDED FEED AND HARDENED SPRINGS AND METHOD FOR PRODUCING HARD RETAINED SPRINGS
ROLLED WIRE ROLL FOR HARDENED SPRINGS, DRAWN WIRE FOR HARDED FEED AND HARDENED SPRINGS AND METHOD FOR PRODUCING HARD RETAINED SPRINGS
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机译:硬化弹簧的轧制钢丝轧制,硬化进给和硬化弹簧的拉制钢丝以及生产硬化保留弹簧的方法
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摘要
Disclosed is a steel wire rod for hard-drawn springs capable of exhibiting fatigue strength and sag resistance equivalent to or higher than springs made of an oil-tempered wire. The steel wire rod contains carbon in a range from 0.5 to less than 0.7 mass %, silicon in a range from 1.4 to 2.5 mass %, manganese in a range from 0.5 to 1.5 mass %, chromium in a range from 0.05 to 2.0 mass %, and vanadium in a range from 0.05 to 0.40 mass %, and has an area ratio Rp with respect to pearlite which satisfies the mathematical expression (1): DF NUM="(1)"Rp(area%) /=55 x ÄCÜ + 61 /DF where ÄCÜ denotes the content (mass %) of carbon. IMAGE
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