Inventor

AZUMA MASAFUMI

JP54 patents

⚠️ This page may combine multiple inventors who share the name “AZUMA MASAFUMI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

AZUMA MASAFUMI

NIPPON STEEL CORP

Hot-rolled steel sheet

High-strength hot-dip galvanized steel sheet and hot-dip galvannealed steel sheet having fatigue resistance, corrosion resistance, ductility and plating adhesion, after severe deformation, and a method of producing the same

High-strength hot-dip galvanized steel sheet and hot-dip galvannealed steel sheet having fatigue resistance corrosion resistance ductility and plating adhesion after servere deformation and a method of producing the same

High-strength steel sheet and method for manufacturing same

High-strength cold-rolled steel sheet and manufacturing method therefor

Steel sheet and method for producing same

Front pillar outer

Cold-rolled steel sheet and method for manufacturing same

Cold-rolled steel sheet and method for producing same

Steel sheet and method for manufacturing same

Hot-dip galvanized steel sheet

Steel sheet and manufacturing method thereof

Burring processing method, method for manufacturing burring processed product, burring processing mold, burring processing device, and burring processed product

High-strength steel sheet and method for manufacturing same

Front pillar outer

Front pillar outer

Steel sheet and plated steel sheet

Stiffened panel structure

Hot-rolled steel sheet

High-strength steel sheet

Automobile undercarriage part

Automobile undercarriage part

Suspension arm

NIPPON STEEL & SUMITOMO METAL CORP

Hot-dip galvanized steel sheet and manufacturing method thereof

Hot-stamped part and method of manufacturing the same

Galvanized steel sheet and method of manufacturing the same

High-strength hot-dip galvanized steel sheet and high-strength alloyed hot-dip galvanized steel sheet having excellent plating adhesion, formability, and hole expandability with tensile strength of 980 MPa or more and manufacturing method therefor

Spot welded joint and spot welding method

High-strength hot-dip galvanized steel sheet and high-strength alloyed hot-dip galvanized steel sheet having excellent formability and small material anisotropy with ultimate tensile strength of 980 MPa or more

Heat-treated steel sheet member and method for producing the same

Hot-rolled steel sheet and manufacturing method thereof

High-strength hot-rolled steel sheet having excellent baking hardenability and low temperature toughness with maximum tensile strength of 980 MPa or more

Hot-rolled steel sheet

Cold-rolled steel sheet and method of manufacturing same

Steel sheet, hot-dip galvanized steel sheet, galvanized steel sheet, and manufacturing methods therefor

Steel sheet, hot-dip galvanized steel sheet, galvannealed steel sheet, and manufacturing methods therefor

Steel sheet

High-strength hot-dip galvanized steel sheet and high-strength alloyed hot-dip galvanized steel sheet having excellent plating adhesion, formability, and hole expandability with tensile strength of 980 MPa or more and manufacturing method therefor

Hot-rolled steel sheet and manufacturing method thereof

Steel sheet

Heat-treated steel sheet member and method for producing the same

Steel sheet for heat treatment

Hot-rolled steel sheet

AZUMA MASAFUMI

High-strength steel sheet and galvanized steel sheet having very good balance between hole expansibility and ductility, and also excellent in fatigue resistance, and methods of producing the steel sheets

High strength steel plate with ultimate tensile strength of 900 MPa or more excellent in hydrogen embrittlement resistance and method of production of same

MORIMOTO YASUHIDE

High-strength galvanized steel sheet and method of manufacturing the same

OIKAWA HATSUHIKO

Spot welded joint

YOSHINAGA NAOKI

Hot-rolled steel sheet excellent in fatigue properties and stretch-flange formability and method for manufacturing the same

FUJITA NOBUHIRO

High-strength hot-dip galvanized steel sheet and hot-dip galvannealed steel sheet having fatigue resistance, corrosion resistance, ductility and plating adhesion, after severe deformation, and a method of producing the same

KAWATA HIROYUKI

High strength steel sheet and high strength galvanized steel sheet excellent in shapeability and methods of production of same