Class 148/623 - Overageing

Subclass of Class 148 - Metal treatment
Definition: Process which defines the aging operation as "overageing".
No. of patents: 20
Last issue date: 01/27/2004

Number	Title	Issue Date
6682613	Process for making high strength micro-alloy steel A process for enhancing precipitation strengthening in steel and for making a high-strength micro-alloy steel, and a steel made from the process. The process includes the step of deforming the steel containing a suitable precipitate strengthening substanc...	01/27/2004
6063215	Method of manufacturing casting belts for use in the casting of metals A belt for use in the casting of metals and a method for its manufacture in which a metal belt is first subjected to heat treatment, quenching and tempering to improve its strength and decrease its stretchability. Then the belt is treated to introduce sur...	05/16/2000
6027581	Cold rolled steel sheet and method of making Cold rolled steel sheet with excellent deep drawability and excellent anti-aging properties, and manufacturing method. The cold rolled steel sheet comprises about C: above 0.015 to 0.150 wt %, Si: 1.0 wt % or less, Mn: 0.01 to 1.50 wt %, P: 0.10 wt % or l...	02/22/2000
5885382	Primary cooling method in continuously annealing steel strip In a method of continuously annealing steel strip comprising a heating step (A), a soaking step (B), a primary cooling step (C) including a rapid cooling step at least in a second half thereof, an overaging step (D), and a final cooling step (E), inert at...	03/23/1999
5123969	Bake-hardening cold-rolled steel sheet having dual-phase structure and process for manufacturing it A bake hardening cold-rolled steel sheet which has good bake hardenability, good dent resistance, and low yield ratio which contributes to the shape-fixability of the steel sheet. The steel is suitable for the outer panel of an automobile. The process for...	06/23/1992
4885041	Method for the manufacture of formable steel strip In the manufacture of formable steel strip having a thickness between 0.5 and 1.5 mm, the following process steps are performed sequentially in a continuous process: (a) in a continuous casting machine forming liquid steel into a hot slab having a thickne...	12/05/1989
4705579	Method for cooling a metal strip in a continuous annealing furnace The present invention relates to a method and apparatus for cooling a steel strip in a continuous annealing furnace, wherein the steel strip is continuously conveyed through a heating zone, a soaking zone, and, occasionally, an overaging zone and a second...	11/10/1987
4618379	Method for the continuous annealing of steel strips This invention relates to the continuous annealing of moving steel strips. A rapid quenching between the annealing treatment and the overaging process is effected in an electrolytic pickling bath, in which the steel strip acts first as a cathode and there...	10/21/1986
4497674	Method and apparatus for continuously annealing steel sheet Steel strip is continuously annealed while successively travelling through a heating, soaking, primary cooling, overaging and secondary cooling zone in an annealing furnace. In the overaging zone, an endless steel strip is allowed to run through a passage...	02/05/1985
4437905	Process for continuously annealing a cold-rolled low carbon steel strip A cold-rolled low carbon steel strip is continuously annealed by rapidly heating the steel strip with a gaseous combustion product which has been prepared at a combustion air ratio of 0.8 or more but less than 1.0 in a direct fired furnace to a temperatur...	03/20/1984
4374682	Process for producing deep-drawing cold rolled steel strips by short-time continuous annealing A process for producing a cold rolled steel strip having excellent workability by a short-time continuous annealing, which process is constituted by hot rolling a low carbon steel slab of steel having a carbon content of from about 0.003 to 0.08% into a s...	02/22/1983
4349393	Continuous heat treatment for metal sheet Metal sheet (cold-rolled steel sheet) contaminated with rolling oil is heated at a temperature higher than its recrystallization temperature in a naked flame furnace, e.g. of the incomplete combustion type. The heated sheet is then rapidly cooled by conta...	09/14/1982
4336080	Method for manufacturing high-strength cold-rolled steel strip excellent in press-formability A method for manufacturing a high-strength cold-rolled steel strip excellent in press-formability, which comprises the steps of: preparing a slab of an aluminum-killed steel consisting essentially of, in weight percentage: the balance iron and incidental ...	06/22/1982
4315783	Method of producing non-ageing cold rolled steel strip with excellent deep-drawability by continuous heat treatment A method of producing a non-ageing cold rolled steel strip having excellent deep-drawability, with a r value of 1.5 or higher and ageing index of not higher than 3 kg/mm2 from an Al-killed steel with a lowered carbon content between 0.001 and 0...	02/16/1982
4191600	Method of continuously heat-treating steel sheet or strip Cold-rolled steel sheet or strip (e.g. containing max. 0.15% C., max. 0.60% Mn, max. 0.020% Si, and 0.001-0.050% B) is heated to a temperature higher than its recrystallization temperature and then cooled by immersion in an aqueous bath at above 75° C. T...	03/04/1980
4145235	Process for producing cold rolled steel sheet and strip having improved cold formabilities A process of producing a cold rolled killed steel sheet with good cold formabilities particularly by continuous-annealing, and more particularly to a process of producing cold rolled steel sheet and strip having particularly enhanced deep drawability by c...	03/20/1979
4052235	Method of preventing oxidation during water quenching of steel strip In a continuous annealing operation of a cold rolled steel strip involving water quenching and over-aging treatments, a method employing a cooling system comprising a pair of rolls arranged to contact the surfaces of a steel strip, a pair of cooling water...	10/04/1977
4040873	Method of making low yield point cold-reduced steel sheet by continuous annealing process A low yield point cold-reduced steel sheet having excellent properties for press-forming can be obtained by a full continuous annealing process when a low carbon steel is manufactured by: 1. chemical composition is substantially controlled at the steel making ...	08/09/1977
3988173	Cold rolled steel sheet having excellent workability and method thereof A cold rolled steel sheet having excellent cold workability comprising not more than 0.10% of carbon, not more than 0.10% of silicon, not more than 0.50% of manganese, not more than 0.0080% of nitrogen, 0.003-0.080% of acid-soluble aluminum, 0.0020-0.0050...	10/26/1976
3947293	Method for producing high-strength cold rolled steel sheet A method for producing a high-strength cold rolled steel sheet or strip is disclosed. Steel comprising 0.05 to 0.15% of C; 0.02 to 0.30% of Si; 0.10 to 1.5% of Mn; 0.02 to 0.07% of Al; and A total of 0.02 to 0.15% of at least one of Nb, V, Ti and Zr; With the remai...	03/30/1976

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Class 148/623 - Overageing