Daido Steel Co., Ltd.

Daido Tokushuko Kabushiki Kaisha

Tocalo Co., Ltd.

Daido Castings Co., Ltd.

Yoshihiko Koyanagi

Hiroyuki Takabayashi

Yoshinori Sumi

Nobuyuki Takahashi

Masashi Nagaya

Tetsuya Shimizu

Junichi Takeuchi

Kenji Sugiyama

Michiharu Ogawa

Takuma Okajima

Yusuke Kusafuka

Masaya Nagai

Daisuke Kudo

Chihiro Furusho

Akihiko Okamoto

Tomohiro Ando

Shinichi Kubo

Kyohei Yokota

Yasuhiro Takenaka

Atsushi Sugino

The present invention relates to a precipitation-hardening martensitic stainless steel, containing: 0<C<0.10 mass %, 0<Si≤0.20 mass %, 0<Mn≤1.00 mass %, 8.0 mass %≤ Ni≤15.0 mass %, 8.0 mass %≤Cr≤14.0 mass %, 0.4 mass %≤Nb≤2.50 mass %, and the balance being Fe and inevitable impurities. The precipitation-hardening martensitic stainless steel has a 0.2% proof stress of 1,300 MPa or more at room temperature and has an absorption energy of 30 J or more at room temperature. The precipitation-hardening martensitic stainless steel has an absorption energy of 10 J or more at −40° C.

Precipitation hardening martensitic stainless steel

The present disclosure relates to an austenitic stainless steel contains C≤0.10 mass %, Si≤0.50 mass %, 3.0≤Mn≤8.0 mass %, P≤0.30 mass %, S≤0.30 mass %, 7.0≤Ni≤12.0 mass %, 18.0≤Cr≤28.0 mass %, 1.0≤Mo≤3.0 mass %, 0.03≤V≤0.50 mass %, 0.0003≤B≤0.0300 mass %, 0.0001≤Ca≤0.0300 mass %, 0.35≤N≤0.80 mass %, W≤2.0 mass %, Zr≤0.20 mass %, Cu≤0.5 mass %, Al≤0.10 mass %, and O≤0.050 mass %, with a balance being Fe and unavoidable impurities. The austenitic stainless steel has a number density of coarse alloy carbonitrides of 3×10pieces/mmor less.

Austenitic stainless steel and hydrogen resistant member

The present invention relates to an Ni-based alloy which is excellent in terms of wear resistance and high-temperature corrosion resistance and which includes 0.3&#x2264;C&#x2264;1.0 mass %, 36.0&#x2264;Cr&#x2264;50.0 mass %, and 3.0&#x2264;Al&#x2264;7.0 mass %, with the balance being Ni and unavoidable impurities, and relates to an Ni-based alloy product made of the Ni-based alloy according to the present invention, and methods for producing the Ni-based alloy product.

Ni-based alloy, and Ni-based alloy product and methods for producing the same

A component for a hot-dip metal plating bath includes a base material and a thermal spray coating disposed to cover a surface of the base material. The base material includes ferritic stainless steel that contains: C: 0.10% to 0.50% by mass; Si: 0.01% to 4.00% by mass; Mn: 0.10% by mass to 3.00% by mass; Cr: 15.0% to 30.0% by mass; a total of Nb, V, Ti, and Ta: 0.9% by mass to 5.0% by mass; and a balance of Fe and unavoidable impurities. The ferritic stainless steel includes a microstructure that includes a ferrite phase as a main phase and a crystallized carbide, an area fraction of a Nb carbide, a Ti carbide, a V carbide, a Ta carbide, and a composite carbide thereof to the crystallized carbide of 30% or more. The hot-dip metal plating bath contains 50% by mass or more of Al.

Component for hot-dip metal plating bath

The present invention relates to a ferritic stainless steel according to the present invention, containing, in mass %: 0.001%&#x2264;C&#x2264;0.020%, 0.05%&#x2264;Si&#x2264;0.50%, 0.1%&#x2264;Mn&#x2264;1.0%, 15.0%&#x2264;Cr&#x2264;25.0%, Mo&#x3c;0.50%, 0.50%&#x2264;W&#x2264;5.00%, and 0.01%&#x2264;Nb&#x2264;0.50%, with a balance being Fe and unavoidable impurities, having a content (coarse Laves phase ratio) of coarse Laves phase having a diameter of 0.50 &#x3bc;m or more being 0.1% or less, and having an average grain size being 30 &#x3bc;m or more and 200 &#x3bc;m or less.

Ferritic stainless steel and heat-resistant member

The present invention relates to a heat-resistant Ti alloy having excellent high-temperature strength and a process for producing the same. More particularly, the present invention relates to a heat-resistant Ti alloy having a composite structure having an equiaxed &#x3b1; phase and &#x3b2; grains containing an acicular &#x3b1; phase inside thereof, and a process for producing the same.

Heat-resistant Ti alloy and process for producing the same

The present invention relates to an Ni-based superalloy having a composition containing, in terms of % by mass, C: from 0.1 to 0.3%, Cr: from 8.0 to 12.0%, Mo: from 1.0 to 5.0%, Co: from 10.0 to 20.0%, Ta: from 0.01 to 1.50%, Ti: from 2.0 to 4.2%, Al: from 5.0 to 8.0%, V: from 0 to 1.5%, B: from 0.005 to 0.030%, and Zr: from 0.05 to 0.15%, with the balance being Ni and unavoidable impurities, and satisfying, in terms of atom %, Ti+Al being from 16.0 to 20.3% and Ti/Al being 0.3 or less.

Ni-based superalloy

The present invention relates to a Ti&#x2014;Al-based heat-resistant member including a Ti&#x2014;Al-based alloy which includes: 28.0 mass % to 35.0 mass % of Al; 1.0 mass % to 15.0 mass % of at least one selected from the group consisting of Nb, Mo, W and Ta; 0.1 mass % to 5.0 mass % of at least one selected from the group consisting of Cr, Mn and V; and 0.1 mass % to 1.0 mass % of Si, with the balance being Ti and unavoidable impurities, in which a whole or a part of a surface of the Ti&#x2014;Al-based heat-resistant member includes a hardened layer as a surface layer, the hardened layer having a higher hardness than an inside of the Ti&#x2014;Al-based heat-resistant member, and the Ti&#x2014;Al-based heat-resistant member has a hardness ratio (a hardness of the surface layer/a hardness of the inside) of 1.4 to 2.5.

Ti&#x2014;Al-based heat-resistant member

The present invention provides a beta-type titanium alloy including, by weight %: Nb: 10 to 25%; Cr: 1 to 10%; at least one of Zr: 10% or less and Sn: 8% or less, satisfying Zr+Sn being 10% or less; and the balance of Ti and inevitable impurities, the alloy having Young's modulus of 100 GPa or less, a process for producing the beta-type titanium alloy, and a beta-type titanium alloy product.

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Nagoya, Japan

Yoshihiko Koyanagi