Abstract: There is provided a manufacturing method of martensite-based stainless steel for edged tools, which can decrease the number of passes during final cold rolling thereby to improve productivity. In the manufacturing method of martensite-based stainless steel for edged tools having a thickness of 0.1 mm or less by cold rolling, the final cold rolling is performed under condition of a diameter of a work roll of 100 to 130 mm, a cold rolling speed of more than 120 and not more than 200 m/min, and a lubricating oil viscosity of 30 to 40 mm2/s. Preferably, the cold rolling speed is 150 to 190 m/min, and the lubricating oil viscosity is 33 to 39 mm2/s.

Abstract: There is provided a manufacturing method of martensite-based stainless steel for edged tools, which can decrease the number of passes during final cold rolling thereby to improve productivity. In the manufacturing method of martensite-based stainless steel for edged tools having a thickness of 0.1 mm or less by cold rolling, the final cold rolling is performed under condition of a diameter of a work roll of 100 to 130 mm, a cold rolling speed of more than 120 and not more than 200 m/min, and a lubricating oil viscosity of 30 to 40 mm2/s. Preferably, the cold rolling speed is 150 to 190 m/min, and the lubricating oil viscosity is 33 to 39 mm2/s.

Abstract: The present invention has the ultimate purpose of obtaining cutlery having marked characteristics such as high hardness and high toughness, and provides an intermediate material, an annealed material, and a cold-rolled steel strip for stainless steel for cutlery, and a method for manufacturing them to achieve the purpose. Provided is an intermediate material for stainless steel for cutlery, the intermediate material being a material after hot rolling but before annealing, having a composition, in terms of % by mass, of from 0.46 to 0.72% C, from 0.15 to 0.55% Si, from 0.45 to 1.00% Mn, from 12.5 to 13.9% Cr, from 0 to 1.5% Mo, from 0 to 0.

Abstract: The present invention provides a martensitic stainless steel strip for razor blades in annealed state comprising a continuous processed groove being formed with thermal energy in a longitudinal direction on one side of the strip at a position with a predetermined distance from one edge; and a continuous changed structure area being formed with thermal energy in a longitudinal direction on opposite side of the strip at a position having a predetermined distance from the edge, wherein the processed groove functions as a splitting portion of the strip. In addition, the present invention provides a method for manufacturing the steel strip for razor blades.

Abstract: The present invention provides a martensitic stainless steel strip for razor blades in annealed state comprising a continuous processed groove being formed with thermal energy in a longitudinal direction on one side of the strip at a position with a predetermined distance from one edge; and a continuous changed structure area being formed with thermal energy in a longitudinal direction on opposite side of the strip at a position having a predetermined distance from the edge, wherein the processed groove functions as a splitting portion of the strip. In addition, the present invention provides a method for manufacturing the steel strip for razor blades.