Nippon Steel Sumitomo Metal Corporation

Honda Motor Co., Ltd.

Nippon Steel Corporation

Occ Corporation

Suzuki Metal Industry Co., Ltd.

Namitei Co., Ltd.

Hitoshi Demachi

Masayuki Hashimura

Seiki Nishida

Shingo Yamasaki

Atsushi Murakami

Makoto Kosaka

Masatsugu Murao

Nariyasu Muroga

Michiyasu Honda

Takayuki Kisu

Keiichi Maekawa

Shouichi Ohashi

Shoichi Suzuki

Jun Kawaguchi

Shoichi Ohashi

Motonobu Suehiro

Kenichi Nakamura

Susumu Sahara

Provided is a wire rod contains, in mass %: C: 0.6 to 1.1%; Si: 0.1 to 0.5%; Mn: 0.2 to 0.6%; S: 0.004 to 0.015%; and, Cr: 0.02 to less than 0.05%; with a balance including Fe and inevitable impurities in which P is limited to 0.02% by mass or lower and Al is limited to 0.003% by mass or lower; the wire rod has a pearlite in a surface thereof; and, the wire rod has, in a peripheral portion in a cross section thereof, a {110} crystal plane of ferrite in the pearlite, an accumulation degree of the crystal plane being 1.2 or more.

High-carbon steel wire rod exhibiting excellent workability

High strength steel wire for spring containing, by mass %, C: 0.67% to less than 0.75%, Si: 2.0 to 2.5%, Mn: 0.5 to 1.2%, Cr: 0.8 to 1.3%, V: 0.03 to 0.20%, Mo: 0.05 to 0.25%, W: 0.05 to 0.30%, and N: 0.003 to 0.007%, having a total of contents of Mn and V of 0.70%&#x2266;Mn+V&#x2266;1.27% and a total of contents of Mo and W of 0.13%&#x2266;Mo+W&#x2266;0.35%, limiting P: 0.025% or less, S: 0.025% or less, and Al: 0.003% or less, and having a balance of iron and unavoidable impurities, having a microstructure comprised of, by volume percent, over 6% to 15% of retained austenite and tempered martensite, having a prior-austenite grain size number of 10 or more, having a density of presence of spheroidal carbides with a circle equivalent diameter of 0.2 to 0.5 &#x3bc;m of 0.06 particles/&#x3bc;mor less, having a density of presence of spheroidal carbides with a circle equivalent diameter of over 0.5 &#x3bc;m of 0.01 particles/&#x3bc;mor less, and having a tensile strength of 2100 to 2350 MPa.

High strength steel wire for spring

Deformed wire for a submarine optical fiber cable used for the pressure-proof layer of the submarine optical cable and having a high strength, that is, having a tensile strength of 1800 MPa or more, is provided, which deformed wire for reinforcing submarine optical fiber cable is characterized by including, by wt %, C: more than 0.65% to 1.1%, Ceq=C+1/4Si+1/5Mn+4/13Cr satisfying 0.80%&#x2266;Ceq&#x2266;1.80%, having a number of shear bands cutting across an L-section center axial line of 20/mm per unit length of the center axis, having an angle formed by the center axis and shear bands in the range of 10 to 90&#xb0;, having a tensile strength of 1800 MPa or more, having a sectional area forming an approximately fan shape, a plurality of the approximately fan shapes being combined to form a circular hollow cross-section for accommodating optical fibers, having at its surface a pebbled surface comprised of relief shapes of depths of 0.2 to 5 &#x3bc;m, and having a weld at least at one location in the longitudinal direction.

Deformed wire for reinforcing marine optical fiber cable

Growing community of inventors

Tokyo, Japan

Hitoshi Demachi