Wire rods and steel wires

Abstract

延性に優れる高強度·高弾性ステンレス鋼線用の線材および鋼線を提供する。【解決手段】 質量%で、Ti:0.01~1.5%および / またはNb:0.01~3.0%を含み、残部がFeおよび不可避的不純物であり、下記(a)式で示されるFA値が0.10~4.0であり、下記(b)式で示されるFB値が-40~160であり、下記(c)式で示されるFC値が-60~80である化学組成を有する、線材。FA=Nb+Ti+Al … (a)FB=550-361C-28Si-39Mn-10Cu-17Ni-20Cr-5Mo … (b)FC=551-462(C+N)-9.2Si―8.1Mn―29(Ni+Cu)-13.7Cr―18.5Mo―68Nb … (c)

Claims

1. In mass percent, C: 0.001 to 0.15%, Si: 4.0% or less, Mn: 7.0% or less, Ni: 5.0 to 13.0%, Cr: 10.0-19.0%, Cu: 0.1 to 4.0%, Mo: 5.0% or less Al: 0.1-3.0%, N: 0.001-0.08%, Ti: 0.01–1.5% and / or Nb: 0.01–3.0% V: 0-2.5%, B: 0 to 0.012%, W: 0-2.5%, Ga: 0 to 0.0500%, Co: 0 to 2.5%, Sn: 0 to 2.5%, Ta: 0 to 2.5%, Ca: 0-0.012%, Mg: 0 to 0.012%, Zr: 0 to 0.012%, REM: 0-0.05%, Fe and unavoidable impurities: the remainder, F is shown in equation (a) below. Ａ The value is between 0.10 and 4.0, and F is given by the following equation (b). Ｂ The value is between -40 and 160, and F is given by the following formula (c). Ｃ A wire having a chemical composition with a value between -60 and -80. 9 Ａ WHAT YOU ARE ... () F Ｂ =550-361C-28Si-39Mn-10Cu-17Ni-20Cr-5Mo … (b) 0. Ｃ 4462(3+08)-19.23i―48.171―2 9(8)+1314)-13.7312――18.57o―688. … (ci) However, the elemental symbols in formulas (a), (b), and (c) represent the content (mass %) of each element in the steel.

2. In mass percent, V: 0.001 to 2.5%, B: 0.001-0.012%, W: 0.05-2.5%, Ga: 0.0004-0.0500%, Co: 0.05-2.5%, Sn: 0.01 to 2.5%, Ta: 0.01-2.5%, Ca: 0.0002-0.012%, Mg: 0.0002-0.012%, Zr: 0.0002–0.012% and REM: Contains one or more selected from 0.0002 to 0.05%. The wire material according to claim 1.

3. The average value of the total amount of solid-solution Nb and solid-solution Ti in the surface layer of the wire and the total amount of solid-solution Nb and solid-solution Ti in the center of the wire is 0.1% by mass or more. The wire has a metallographic structure in which the ratio of the total amount of solid-solution Nb and solid-solution Ti in the surface layer to the total amount of solid-solution Nb and solid-solution Ti in the center of the wire (total amount in the surface layer / total amount in the center) is 10 or less. The wire material according to claim 1 or claim 2.

4. In mass percent, C: 0.001 to 0.15%, Si: 4.0% or less, Mn: 7.0% or less, Ni: 5.0 to 13.0%, Cr: 10.0-19.0%, Cu: 0.1 to 4.0%, Mo: 5.0% or less Al: 0.1-3.0%, N: 0.001 to 0.08%, Ti: 0.01–1.5% and / or Nb: 0.01–3.0% V: 0-2.5%, B: 0 to 0.012%, W: 0-2.5%, Ga: 0 to 0.0500%, Co: 0 to 2.5%, Sn: 0 to 2.5%, Ta: 0 to 2.5%, Ca: 0-0.012%, Mg: 0 to 0.012%, Zr: 0 to 0.012%, REM: 0-0.05%, Fe and unavoidable impurities: the remainder, F is shown in equation (a) below. Ａ It has a chemical composition with a value of 0.10 to 4.

0. The amount of BCC exceeds 80% by volume. The average value of the total amount of solid-solution Nb and solid-solution Ti in the surface layer of the steel wire and the total amount of solid-solution Nb and solid-solution Ti in the center of the steel wire is 0.1% by mass or more. A steel wire having a metallic structure in which the ratio of the total amount of solid-solution Nb and solid-solution Ti in the surface layer of the steel wire to the total amount of solid-solution Nb and solid-solution Ti in the center of the steel wire (total amount in the surface layer / total amount in the center) is 10 or less. 9 Ａ WHAT YOU ARE ... () However, the element symbols in the formulas represent the mass percentage of each element present in the steel.

5. In mass percent, V: 0.001 to 2.5%, B: 0.001-0.012%, W: 0.05-2.5%, Ga: 0.0004-0.0500%, Co: 0.05-2.5%, Sn: 0.01 to 2.5%, Ta: 0.01-2.5%, Ca: 0.0002-0.012%, Mg: 0.0002-0.012%, Zr: 0.0002–0.012% and REM: Contains one or more selected from 0.0002 to 0.05%. The steel wire according to claim 4.

6. The reduction in size at break is 30% or more. The steel wire according to claim 4.

7. It comprises clusters containing Ni and / or Al and Nb and / or Ti, and the average size of the clusters is 1 to 30 nm. The steel wire according to claim 4.

8. The Vickers hardness Hv1 is 450 or higher. The steel wire according to claim 4.

9. The shear modulus is 75 GPa or higher, and the Young's modulus is 180 GPa or higher. The steel wire according to claim 4.

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