| 摘要 |
This invention relates to a quenched and tempered ferrous alloy suitable for helical springs, such as used in automotive suspension systems. More particularly, it is directed to a hot-formed, oil-quenched and tempered helical spring formed of a ferrous alloy consisting essentially of, by weight, about 0.51 to 0.91 percent carbon, about 0.75 to 1.00 percent manganese, about 0.70 to 1.10 percent silicon, about 0.25 to 0.40 percent chromium, the remainder substantially iron and incidental impurities. In the formed and heat-treated condition, said springs are characterized by good resistance to load loss, good resilience, resistance to atmospheric corrosion, and good surface qualilty.
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