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 generat...

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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