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Magnetostriction control type alloy plate and structural element for colour kinescope and process for producing magnetostriction control type alloy plate

A technology of magnetostriction and manufacturing method, applied in manufacturing tools, non-light-emitting electrode manufacturing, discharge tubes, etc., can solve problems such as color shift picture quality, achieve stable physical properties, high Young's modulus, magnetic permeability high effect

Inactive Publication Date: 2002-02-13
DAI NIPPON PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, "color shift" caused by the magnetization of the shadow mask itself due to the current generated when the electron beam passes through the holes of the shadow mask also becomes a problem of picture quality

Method used

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  • Magnetostriction control type alloy plate and structural element for colour kinescope and process for producing magnetostriction control type alloy plate
  • Magnetostriction control type alloy plate and structural element for colour kinescope and process for producing magnetostriction control type alloy plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0053] Examples of the present invention will be described below, and their effects will be described in comparison with comparative examples outside the scope of the present invention.

[0054] The Ni-Fe-Co alloys with the compositions shown in Table 1 were forged in a temperature range of 1200-1350° C. by vacuum dissolution, and then the plates were heated at 1000-1250° C. and hot-rolled to a thickness of 3.5 mm. Then, through the steps of cold rolling (first time), annealing, cold rolling (second time), final annealing, adjustment rolling, and strain relief annealing, an alloy plate with a thickness of 0.12 mm was produced. Table 2 shows each final cold rolling ratio (second cold rolling ratio), final annealing temperature, and temper rolling ratio in this manufacturing process.

[0055] Example number

Ni

co

Cr

Si

C

mn

Compare

compare

example

1

36

0.03

0.01

0.03

0.005

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PUM

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Abstract

The invention relates to a magnetostriction control alloy sheet advantageously used as a high resolution shadow mask having a low coefficient of thermal expansion, superior magnetic properties and a high Young's modulus after a blackening process, a manufacturing process for the same, and a part for a color Braun tube such as a shadow mask. The magnetostriction control alloy sheet comprises C at 0.01 wt. % or less, Ni at 30 to 36 wt. %, Co at 1 to 5.0 wt. %, and Cr at 0.1 to 2 wt. %, the remainder Fe and unavoidable impurities, and having a magnetostriction lambda after the softening and annealing of (-15x10<-6>) to (25x10<-6>).

Description

technical field [0001] The present invention relates to a low thermal expansion magnetostriction control type alloy plate and a manufacturing method thereof, in particular to a suitable magnetostriction control type alloy plate as a shadow mask used in a CRT (cathode ray tube (eathode-ray tabe)] and its method of manufacture. [0002] This specification is based on a Japanese patent application (Japanese Patent Application No. 2000-222335), and the content of this Japanese patent is incorporated as a part of this specification. Background technique [0003] Generally, in order to manufacture a shadow mask used for a display for a PC (Personal Computer), first, an alloy plate is perforated by photolithography to form a plurality of conical holes through which electron beams pass. Then, a softening heat treatment is applied to the obtained planar mask, and then the softened and annealed planar mask is press-molded into a shape suitable for the shape of a Brownian tube, and th...

Claims

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Application Information

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IPC IPC(8): C21D9/46C21D8/02C21D8/12C22C38/00C22C38/04C22C38/52H01J9/14H01J29/07
CPCC22C38/004C21D8/0273C21D8/0236C21D8/0205C22C38/04C22C38/52H01J2229/0733H01J29/07C23F1/02C21D8/12
Inventor 福田宪男中村晋也山田博之牧田明羽田野勉金山信明青木孝仁
Owner DAI NIPPON PRINTING CO LTD
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