Nikon Corporation

Nippon Steel Sumitomo Metal Corporation

Nippon Steel Corporation

Az Electronic Materials (luxembourg) S.a.r.l.

Anelva Corporation

Merck Patent Gmbh

Az Electronic Materials USA Corp.

Yasuaki Tanaka

Toshiro Tomida

Kaori Kawano

Kenji Nishi

Toshiaki Nonaka

Daishi Yokoyama

Seiro Murakami

Takashi Fuke

Yoshiaki Nakazawa

Takuya Nishio

Jun Haga

Masayuki Wakita

Yuji Tashiro

Masahito Tasaka

Naofumi Yoshida

Norio Imai

Megumi Takahashi

Yuji Imai

Kazuya Okamoto

Atsushi Sekiguchi

Mitsuru Yoshida

Katsuto Taniguchi

Shinji Wakamoto

Takashi Sekito

Hidehiro Maeda

Atsuko Noya

Kengo Hata

Ryoki Tobe

Hitoshi Jimba

So Won Kim

Naomasa Shiraishi

Nobutaka Magome

Shigeru Hirukawa

Tohru Kiuchi

Hiroshi Takebayashi

Kazuo Ushida

Nobuyuki Irie

Yasuyuki Sakakibara

Suguhiro Fukushima

Yuki Tashiro

Satoro Sanada

A hot-dip galvanized cold-rolled steel sheet has a tensile strength of 750 MPa or higher, a composition consisting, in mass percent, C: more than 0.10% and less than 0.25%, Si: more than 0.50% and less than 2.0%, Mn: more than 1.50% and 3.0% or less, and optionally containing one or more types of Ti, Nb, V, Cr, Mo, B, Ca, Mg, REM, and Bi, P: less than 0.050%, S: 0.010% or less, sol. Al: 0.50% or less, and N: 0.010% or less, and a main phase as a low-temperature transformation product and a second phase as retained austenite. The retained austenite volume fraction is more than 4.0% and less than 25.0% of the whole structure, and has an average grain size of less than 0.80 &#x3bc;m. A number density of retained austenite grains having a grain size of 1.2 &#x3bc;m or more is 3.0&#xd7;10/&#x3bc;mor less.

Hot-dip galvanized cold-rolled steel sheet and process for producing same

A high-strength steel sheet has a chemical composition comprising C: 0.05-0.20%, Si: 0.02-3.0%, Mn: 0.5-3.0%, P: at most 0.5%, S: at most 0.05%, Cr: 0.05-1.0%, sol. Al: 0.01-1.0%, one or more elements selected from the group consisting of Ti, Nb, Mo, V, and W: a total of 0.002-0.03%, and a remainder of Fe and impurities. The sheet has an average grain diameter of ferrite of at most 3.0 &#x3bc;m at least in a region of 100-200 &#x3bc;m in the sheet thickness direction from the surface of the steel sheet. The average spacing in the sheet thickness direction of the remaining structure in this region is at most 3.0 &#x3bc;m. Mechanical properties include at least 750 MPa tensile strength and at least 13,000 MPa&#xb7;% (tensile strength&#xd7;elongation).

Steel sheet and a method for its manufacture

A steel material comprising, by mass%, C: greater than 0.05% to 0.2%, Mn: 1% to 3%, Si: greater than 0.5% to 1.8%, Al: 0.01% to 0.5%, N: 0.001% to 0.015%, Ti or a sum of V and Ti: greater than 0.1% to 0.25%, Ti: 0.001% or more, Cr: 0% to 0.25%, Mo: 0% to 0.35%, the balance: Fe and impurities, comprising a multi-phase structure having a ferrite main phase and a second phase containing one or more of bainite, martensite and austenite, wherein an average nanohardness of the second phase is less than 6.0 GPa, an average grain diameter of all crystal grains in the main phase and the second phase is 3 &#x3bc;m or less, and a proportion of a length of small-angle grain boundaries where the misorientation is 2&#xb0; to less than 15&#xb0; in a length of all grain boundaries is 15% or more.

Steel material

A method for producing a high-tensile cold-rolled steel sheet includes subjecting a slab having a composition containing C: more than 0.020% and less than 0.30%, Si: more than 0.10% and 3.00% or less, and Mn: more than 1.00% and 3.50% or less to hot rolling wherein the roll draft of the final one pass is higher than 15%, and rolling is finished in the temperature region of Arpoint or higher, optionally annealing wherein the hot-rolled steel sheet is heated to 300&#xb0; C. or higher after being cooled to 780&#xb0; C. or lower, coiling higher than 400&#xb0; C. or lower than 400&#xb0; C., cold rolling the hot-rolled steel sheet or the annealed steel sheet, and annealing wherein the cold-rolled steel sheet is soaked in the temperature region of (Acpoint&#x2212;40&#xb0; C.) or higher, cooling to 500&#xb0; C. or lower and 300&#xb0; C. or higher, and holding in that temperature region for 30 seconds or longer.

Method for producing cold-rolled steel sheet

A multi-phase hot-rolled steel sheet having improved strength in an intermediate strain rate region has a chemical composition comprising, in mass percent, C: 0.07-0.2%, Si+Al: 0.3-1.5%, Mn: 1.0-3.0%, P: at most 0.02%, S: at most 0.005%, Cr: 0.1-0.5%, N: 0.001-0.008%, at least one of Ti: 0.002-0.05% and Nb: 0.002-0.05%, and a remainder of Fe and impurities. The area fraction of ferrite is 7-35%, the grain diameter of ferrite is in the range of 0.5-3.0 &#x3bc;m, and the nanohardness of ferrite is in the range of 3.5-4.5 GPa. A second phase which is the remainder other than ferrite contains martensite and bainitic ferrite and/or bainite. The average nanohardness of the second phase is 5-12 GPa, and the second phase contains a high-hardness phase of 8-12 GPa with an area fraction of 5-35% based on the overall structure.

Multi-phase hot-rolled steel sheet having improved dynamic strength and a method for its manufacture

A steel material contains: by mass %, C: greater than 0.05% to 0.18%; Mn: 1% to 3%; Si: greater than 0.5% to 1.8%; Al: 0.01% to 0.5%; N: 0.001% to 0.015%; one or both of V and Ti: 0.01% to 0.3% in total; Cr: 0% to 0.25%; Mo: 0% to 0.35%; a balance: Fe and impurities; and 80% or more of bainite by area %, and 5% or more in total of one or two or more selected from a group consisting of ferrite, martensite and austenite by area %, in which an average block size of the above-described bainite is less than 2.0 &#x3bc;m, an average grain diameter of all of the above-described ferrite, martensite and austenite is less than 1.0 &#x3bc;m, an average nanohardness of the above-described bainite is 4.0 GPa to 5.0 GPa, and MX-type carbides each having a circle-equivalent diameter of 10 nm or more exist with an average grain spacing of 300 nm or less therebetween.

A multi-phase hot-rolled steel sheet has a metallurgical structure having a main phase of ferrite with an average grain diameter of at most 3.0 &#x3bc;m and a second phase including at least one of martensite, bainite, and austenite. In the surface layer, the average grain diameter of the second phase is at most 2.0 &#x3bc;m, the difference (&#x394;nH) between the average nanohardness of the main phase (nH) and the average nanohardness of the second phase (nH) is 6.0-10.0 GPa, the difference (&#x394;&#x3c3;nH) of the standard deviation of the nanohardness of the second phase from the standard deviation of the nanohardness of the main phase is at most 1.5 GPa, and in the central portion, the difference (&#x394;nH) between the average nanohardnesses is at least 3.5 GPa to at most 6.0 GPa and the difference (&#x394;&#x3c3;nH) between the standard deviations of the nanohardnesses is at least 1.5 GPa.

Hot-rolled, cold rolled, and plated steel sheet having improved uniform and local ductility at a high strain rate

The steel material for an impact absorbing member has a composition containing: by mass %, C: 0.05 to 0.18%, Mn: 1 to 3%, Si+Al: at least 0.5% and less than 2.5%, and N: 0.001 to 0.015%, and in some cases, Cr: at most 0.5%, Mo: at most 0.2%, Ti: at most 0.05%, Nb: at most 0.05%, V: at most 0.2%, and B: at most 0.002%, the remainder being Fe and impurities. The steel material structure contains at least 70% by area of bainite made up of a lath structure having an average interval of at most 1 mm and martensite, 5 to 30%, and satisfies Formulas (1) and (2): (1) 1.2 &#xa3; H/H&#xa3; 1.6, (2) 0.90 &#xa3; {(H/H)/(H/H) &#xa3; 1.3, where Hand Hrepresent average nano hardness in an initial state and after 10% tensile deformation of the martensite, and Hand Hrepresent that of bainite, respectively.

Steel material and impact absorbing member

A steel sheet suitable as a starting material for a vehicle impact absorbing member with high absorption of impact energy and resistance to cracking contains, by mass %, C: 0.08-0.30%, Mn: 1.5-3.5%; Si+Al: 0.50-3.0%, P: 0.10% or less, S: at most 0.010%, and N: at most 0.010%, and optionally, one or more types selected from Cr: at most 0.5%, Mo: at most 0.5% , B: at most 0.010%, Ti: less than 0.04%, Nb: less than 0.030%, V: less than 0.5%, Ca: at most 0.010%, Mg: at most 0.010%, REM: at most 0.050%, and Bi: at most 0.050%. The microstructure contains, by area %, bainite: more than 50%, martensite: 3-30%, and retained austenite: 3-15%, the remainder comprising ferrite having an average grain diameter of less than 5 mm. The product of uniform elongation and hole expansion ratio is at least 300%and 5% effective flow stress is at least 900 MPa.

Steel sheet suitable for impact absorbing member and method for its manufacture

To provide a negative-working photosensitive siloxane composition developable inorganically, and also to provide a cured film-manufacturing method employing that. The present invention provides a negative-working photosensitive siloxane composition comprising a polysiloxane, a silicon-containing compound having an ureido bond, a polymerization initiator, and a solvent. This composition is coat on a substrate, exposed to light, and developed, so that a cured film can be obtained without carrying out post-exposure baking.

Negative-working photosensitive siloxane composition

A high-strength cold-rolled steel sheet excellent in ductility, work hardenability, and stretch flangeability, and having tensile strength of 780 MPa or more includes: a chemical composition containing, in mass percent, C: more than 0.020% to less than 0.30%, Si: more than 0.10% to 3.00% or less, Mn: more than 1.00% to 3.50% or less; and metallurgical structure whose main phase is a low-temperature transformation product, and whose secondary phase contains retained austenite. The retained austenite has a volume fraction relative to overall structure of more than 4.0% to less than 25.0% and an average grain size of less than 0.80 &#x3bc;m, and of the retained austenite, the number density of retained austenite grains whose grain size is 1.2 &#x3bc;m or more is 3.0&#xd7;10grains/&#x3bc;mor less.

Cold-rolled steel sheet

[Problem] An object of the present invention is to provide a composite of metal oxide nanoparticles and a silsesquioxane polymer, which can form a high-quality cured film wherein aggregation and the like of metal oxide do not occur during a curing process and the metal oxide is uniformly dispersed. [Means for Solution] Provided are: a method of producing a composite of metal oxide nanoparticles and a silsesquioxane polymer, the method comprising reacting a silsesquioxane polymer having a silanol group at a terminal, or a silane monomer with metal oxide nanoparticles having a hydroxyl group or an alkoxy group on the surface in an aqueous solvent in the presence of a phase transfer catalyst; and a composite produced by the method.

Composite of metal oxide nanoparticles and silsesquioxane polymer, method for producing same, and composite material produced using composite thereof

[Object] To provide a negative-working photosensitive siloxane composition developable inorganically, and also to provide a cured film-manufacturing method employing that. [Means] The present invention provides a negative-working photosensitive siloxane composition comprising a polysiloxane, a silicon-containing compound having a pKa of 2.0 to 15.7, a photo-polymerization initiator, and a solvent. This composition is coat on a substrate, exposed to light, developed with an inorganic developer, and heated, so that a cured film can be obtained.

[Object] To provide a photosensitive siloxane resin composition excellent in alkali-solubility and in sensitivity, and also to provide a pattern-formation method employing that. [Means] The present invention provides a photosensitive siloxane resin composition comprising: a siloxane resin having silanol groups or alkoxysilyl groups, a crown ether, a photosensitive material, and an organic solvent. This photosensitive composition is cast on a substrate, subjected to imagewise exposure, treated with an alkali aqueous solution, and cured to form a pattern.

Photosensitive siloxane resin composition

The throughput of the alignment in an alignment apparatus is improved. There is provided an alignment apparatus for aligning a substrate having an alignment mark, including a first aligner that aligns the substrate to a first reference position, a second aligner that aligns a substrate holder to a second reference position before the substrate holder holds the substrate, and a position detector that detects a position of the alignment mark of the substrate after the substrate holder holds the substrate.

Alignment apparatus, substrates stacking apparatus, stacked substrates manufacturing apparatus, exposure apparatus and alignment method

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Tokyo, Japan

Yasuaki Tanaka