Method for making creep resistant refractory metal structures

A metal structure and metal technology, applied in glass manufacturing equipment, manufacturing tools, glass molding, etc., can solve the problems of overlapping and non-overlapping, and achieve the effect of improving mechanical properties and improving sag resistance.

Inactive Publication Date: 2012-10-03
CORNING INC
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  • Method for making creep resistant refractory metal structures
  • Method for making creep resistant refractory metal structures
  • Method for making creep resistant refractory metal structures

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[0046] Unless otherwise indicated, it is to be understood that all numbers used in the specification and claims, such as those expressing weight percents of ingredients, dimensions, and values ​​of certain physical properties, are in all instances modified by the term "about". It should also be understood that the precise numerical values ​​used in the specification and claims form additional embodiments of the invention. Efforts have been made to ensure the accuracy of the numerical values ​​disclosed in the examples. Any measured numerical value, however, may inherently contain errors resulting from the standard deviation found in their respective measurement techniques.

[0047] As used herein, in the description and claims of the present invention, the indefinite article "a" or "an" means "at least one", "at least one", and should not be limited to "only one" or "Only one" unless expressly stated to the contrary.

[0048] For the convenience of description, in this appli...

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Abstract

A method for making a metal structure comprising: (i) selectively grit-blasting a part of a major surface of the metal sheet at a temperature lower than the annealing temperature of the metal sheet to impart a stress in the metal sheet; and (ii) subjecting the metal sheet to a heat treatment at a temperature not lower than T(anneal) -400 DEG C so that the metal sheet deforms, such that the deformed metal sheet exhibits a higher strength in a desired direction, wherein T(anneal) is the annealing point of the metal. The invention is particularly advantageous for making thin Pt metal structures for glass melting, conditioning, delivery and forming operations.

Description

[0001] This application claims priority to US Provisional Patent Application 61 / 264461, filed November 25, 2009. technical field [0002] This invention relates to the machining of refractory metals to improve their strength at elevated temperatures. In particular, the present invention relates to surface machining of refractory metal sheets, such as noble metal sheets, to improve their mechanical strength at elevated temperatures. The invention is useful, for example, in the fabrication of refractory metal structures that operate at high temperatures, such as molten glass melting, conditioning, conveying, and forming. Background technique [0003] Precious metal alloys, such as platinum and platinum-rhodium, have long been used as "glass contact" materials for high-quality melting, conditioning, conveying and forming systems. These and other noble metals are used due to their relatively high inertness to contamination of the molten glass by defects such as gaseous and soli...

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Application Information

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IPC IPC(8): B24C1/10C21D7/06C03B5/00C03B15/02
CPCC21D1/26B24C1/10C21D7/06C21D1/30C03B5/1675C03B5/1672
Inventor D・M・莱恩曼P・R・格尔泽西克I・M・斯莱特W・R・鲍威尔
Owner CORNING INC
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