Other

Sony Corporation

Nippon Steel Corporation

Chohachi Sato

Hiroaki Kato

Teruo Takeuchi

Ichiro Saito

Takeshi Kubota

Yoshihiko Oda

Yasushi Tanaka

Hideki Matsuoka

Reiko Sugihara

Tatsuhiko Hiratani

Kunikazu Tomita

Kazuo Koyama

Satoru Tanaka

Kenji Tahara

Satoshi Kodama

Yasuharu Sakuma

Yasuyuki Takada

Atsushi Itami

Yujiro Miyauchi

Nobuo Yamagami

Kenichi Mitsuzuka

Masamichi Okada

Kenichiro Takayanagi

A method of making a steel sheet for a tension mask, including the steps of: hot rolling a steel consisting essentially of, by weight %, C: less than 0.1%, Si: 0.05% or less, Mn: 0.4 to 2%, P: 0.03% or less, S: 0.03% or less, sol.Al: 0.01% or less, N: 0.010% or more, and the balance of Fe; and annealing the cold rolled steel sheet, followed by a secondary cold rolling at a reduction rate of 35% or higher. The steel sheet produced by this method shows excellent creep resistance during blackening treatment and excellent magnetic shielding property with an anhysteretic permeability of 3400 or more at a DC bias magnetic field of 0.35 Oe, and therefore causes no color-deviation when applied to the tension mask.

Steel sheet for tension mask, making method thereof and tension mask

A steel sheet for preparing a heat shrink band effective for preventing the color drift is provided by a steel sheet having 24 kg/mm or higher of yield stress and 400 or higher of the product between the permeability &mgr; under a magnetic field of 0.3 Oe and the sheet thickness.

Steel sheet for heat shrink band effective for preventing color drift

Provided are a high strength cold rolled steel sheet and a high strength plated steel sheet possessing improved geomagnetic shielding properties, that is, having a high relative permeability in a d.c. magnetic field around 0.3 Oe, a process for producing the same, and an explosion-proof band or an outer magnetic shielding material, for television cathode-ray tubes, using the steel sheet. An ultra low carbon steel, which has a carbon content of not more than 0.0060% and has been subjected to solid solution strengthening utilizing silicon and magnesium without relying upon precipitation strengthening, is deoxidized with silicon so that aluminum is substantially absent in the steel. Alternatively, when the ultra low carbon steel is deoxidized with aluminum, boron is added to inhibit the precipitation of AlN. Next, the deoxidized steel is finish rolled at 750 to 980.degree. C., cold rolled with a reduction ratio of 60 to 90%, and then annealed in the temperature range of 750.degree. C. to the Ac.sub.3 point in a continuous annealing equipment or an in-line annealing type continuous galvanizing equipment to bring the ferrite grain diameter in the metallographic structure to 10 to 200 .mu.m.

High-strength cold rolled steel sheet and high-strength plated steel

Growing community of inventors

Isehara, Japan

Chohachi Sato