Abstract: A burner for directly flaming steel making materials to accomplish reduction without oxidation, wherein the burner comprises a plurality of combusion air outlets spaced circumferentially of the inner wall of a tubular burner tile, and fuel gas outlets disposed centrally of the burner tile, and wherein the combustion air outlets and fuel gas outlets are formed and disposed with specified jetting angles and distances to produce burning without oxidation.

Abstract: A burner for directly flaming steel making materials to accomplish reduction without oxidation, wherein the burner comprises a plurality of combustion air outlets spaced circumferentially of the inner wall of a tubular burner tile, and fuel gas outlets disposed centrally of the burner tile, and wherein the combustion air outlets and fuel gas outlets are formed and disposed with specified jetting angles and distances to produce buring without oxidation.

Abstract: A burner for directly flaming steel making materials to accomplish reduction without oxidation, wherein the burner comprises a plurality of combustion air outlets spaced circumferentially of the inner wall of a tubular burner tile, and fuel gas outlets disposed centrally of the burner tile, and wherein the combustion air outlets and fuel gas outlets are formed and disposed with specified jetting angles and distances to produce burning without oxidation.

Abstract: A burner for directly flaming steel making materials to accomplish reduction without oxidation, wherein the burner comprises a plurality of combustion air outlets spaced circumferentially of the inner wall of a tubular burner tile, and fuel gas outlets disposed centrally of the burner tile, and wherein the combustion air outlets and fuel gas outlets are formed and disposed with specified jetting angles and distances to produce burning without oxidation.

Abstract: A burner for directly flaming steel making materials to accomplish reduction without oxidation, wherein the burner comprises a plurality of combustion air outlets spaced circumferentially of the inner wall of a tubular burner tile, and fuel gas outlets disposed centrally of the burner tile, and wherein the combustion air outlets and fuel gas outlets are formed and disposed with specified jetting angles and distances to produce burning without oxidation.

Abstract: A burner for directly flaming steel making materials to accomplish reduction without oxidation, wherein the burner comprises a plurality of combustion air outlets spaced circumferentially of the inner wall of a tubular burner tile, and fuel gas outlets disposed centrally of the burner tile, and wherein the combustion air outlets and fuel gas outlets are formed and disposed with specified jetting angles and distances to produce burning without oxidation.

Abstract: This invention relates to a continuously treating line for a steel band, having a heating furnace by directly flaming. For heating the steel band with causing reduction, the heating furnace of directly flaming system is provided with a plurality of heating burners of reduction system which may form non-equilibrium range of the air and the fuel in a flame, that is, a reduction range, wherein the heating burners are positioned at predetermined arrangement with respect to the steel band and at a certain pitch predetermined in relation with an inner diameter of the burner in a line running direction.The treating line has said heating furnace constructed as mentioned above and a subsequent atmosphere furnace, and said atmosphere furnace may be provided with a sealing chamber having various means for avoiding invasion of the outer air.

Abstract: A method for manufacturing a one-side electrogalvanized steel strip, which comprises: continuously causing a steel strip to travel through an electrogalvanizing bath in an electrogalvanizing tank; arranging an electrode plate in the electrogalvanizing bath in the electrogalvanizing tank in parallel to a one-side surface to be electrogalvanized of the steel strip; electrogalvanizing the one-side surface of the steel strip; arranging a spray nozzle toward the other surface not electrogalvanized of the steel strip which has passed through the electrogalvanizing tank; ejecting any one of an aqueous solution containing a weak acid of from 0.1 to 5.0 wt.

Abstract: A high tension Al-killed steel of which the yield point is more increased by the ensuing heat treatment after press-forming than that of the properties in which the tensile strength is above 40 to 80 Kg/mm.sup.2, is made by the following main steps:1. the chemical composition of steel is substantially controlled at the range of 0.04 to 0.12% C, 0.10 to 1.60% Mn, and 0.010 to 0.200% Sol.Al,2. the above steel is hot-rolled with a finishing temperature of more than 800.degree. C and a coiling temperature of less than 630.degree. C,3. after the above steel strip cold-reduced with the ordinary requirements is continuously heated up to 700.degree. to 900.degree. C and then rapidly cooled by a jet of water, said strip is reheated up to 150.degree. to 400.degree. C and held for 2 to 300 seconds at said temperature to partially remain solution carbon in steel.

Abstract: A steel consisting essentially of 0.04 to 0.10% C, 0.04 to 0.20% P, not more than 0.02% S, and [S]% .times. 10 to 0.7% Mn is conventionally hot and cold rolled. It is then subjected to the following continuous annealing:Recrystallization heating step: Ac.sub.1 to 900.degree. C. .times. 10 to 120 sec.;Quenching step: starting temperature of quench: Ac.sub.1 to 900.degree. C.; quenching method: jet stream of water;Tempering quenched steel: 200.degree. to 500.degree. C. .times. 10 to 180 sec.,And then conventional cooling and coiling. The steel has high tensile strength and excellent elongation and weldability characteristics.

Abstract: When a cold reduced steel of which chemical composition is substantially controlled within the range of 10x[S]% to 2.00% [Mn], 0.003 to 0.02% [N] and (<5.times.10.sup.31 4)/[N]% [Al] is subjected to a full continuous annealing process comprising a heating-up step of Ac.sub.1 to 900.degree. C .times. 5 to 180 sec., a rapid cooling step of the heating-up temperature to about room temperature by water-spray, reheating step of the room temperature to 150.degree. C to 450.degree. C .times. 5 to 300 sec., and then final cooling- and coiling step, high bake-hardenability and excellent non-aging property are given to the above steel with ease.

Abstract: A steel being substantially made and adjusted within the range of 0.04 to 0.12% C, 0.50 to 2.00% Si, and 0.10 to 1.60% Mn, passed through ordinary hot and cold rolling processes, is subjected to a full continuous annealing process comprising the following steps:1. recrystallization heating step; rapid heating up to the range of 650.degree.C to 900.degree.C at a rate of 200.degree.C/min. and more;2. keeping and soaking step; holding for 10 to 120 sec. at the above heating temperature;3. ordinary cooling step; cooling to room temperature from the holding temperature;4. and then ordinary cooling step;Becomes a utility cold reduced steel having the most suitable mechanical properties required as a safe countermeasure for an automobile and similar vehicles.