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Drawn heat treated steel wire for high strength spring use and pre-drawn steel wire for high strength spring use

InactiveUS20120291927A1Excellent cold coiling abilityExcellent temper softening resistanceFurnace typesRollsChromiumHigh intensity

Drawn heat treated steel wire for high strength spring use is provided containing, by mass %, C: 0.67% to less than 0.9%, Si: 2.0 to 3.5%, Mn: 0.5 to 1.2%, Cr: 1.3 to 2.5%, N: 0.003 to 0.007%, and Al: 0.0005% to 0.003%, having Si and Cr satisfying the following formula:0.3%≦Si−Cr≦1.2%,and having a balance of iron and unavoidable impurities, having as impurities, P: 0.025% or less and S: 0.025% or less, furthermore having a circle equivalent diameter of undissolved spherical carbides of less than 0.2 μm, further having, as a metal structure, at least residual austenite in a volume rate of over 6% to 15%, having a prior austenite grain size number of #10 or more, and having a circle equivalent diameter of undissolved spherical carbides of less than 0.2 μm.

Drawn heat treated steel wire for high strength spring use and pre-drawn steel wire for high strength spring use

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Owner:NIPPON STEEL & SUMITOMO METAL CORP

1results about How to "Excellent temper softening resistance" patented technology

Drawn heat treated steel wire for high strength spring use and pre-drawn steel wire for high strength spring use

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