Other

Shinji Tsuge

Hideharu Ohmae

Noriaki Nagao

Tatsuo Yoshii

Daisuke Nago

Yasutaka Okada

Tsuyoshi Sakashita

Takaaki Matsuda

This invention provides a mask frame for a color CRT made from a steel composition consisting essentially of, in mass %, C: 0.03-0.30%, Si: at most 0.30%, Mn: 0.05-1.5%, P: at most 0.05%, S: at most 0.02%, Mo: 0.02-0.50%, V: 0.02-0.20%, Al: at most 0.10%, N: 0.0040-0.0200%, Cu: at most 1.0%, Ni: at most 1.0%, Cr: at most 2.0%, W: at most 1.0%, B: at most 0.003%, Ti: at most 0.030%, and Nb: at most 0.030%, and a balance of iron and unavoidable impurities, with Al&lE;(7.0)N, and having a metal structure in which the ferrite grain size is at most 15 micrometers and the ferrite volume ratio is at most 90%.

Color CRT mask frame, a steel sheet used therefor and a manufacturing method for the steel sheet, and a color CRT equipped with the frame

This invention provides a steel sheet for a mask frame which maintains a tension-type color CRT shadow mask under tension. The steel sheet has a steel composition consisting essentially of, in mass %, C: 0.03-0.30%, Si: at most 0.30%, Mn: 0.05-1.5%, P: at most 0.05%, S: at most 0.02%, Mo: 0.02-0.50%, V: 0.02-0.20%, Al: at most 0.10%, N: 0.0040-0.0200%, optionally one or two or more of Cu: at most 1.0%, Ni: at most 1.0%, Cr: at most 2.0%, W: at most 1.0%, B: at most 0.003%, Ti: at most 0.030%, and Nb: at most 0.030%, and a balance of iron and unavoidable impurities, with Al&lE;(7.0)N, and having a metal structure in which the ferrite grain size is at most 15 micrometers and the ferrite volume ratio is at most 90%. The steel sheet is manufactured by hot rolling of a slab having the above-described steel composition under the conditions of a finishing temperature of 820-950&deg; C. and a coiling temperature of 400-700&deg; C.

Steel sheet used for color CRT mask frame and a manufacturing method for the steel sheet

Stainless steel for a disc brake rotor

Growing community of inventors

Nishinomiya, Japan

Shinji Tsuge