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Fire-clay crucible capable of reacting thermal stress and being suitable for melting alloy with high activity

A thermal stress, high activity technology, applied in crucible furnaces, lighting and heating equipment, furnaces, etc., can solve the problems of crucible cracking, increasing thermal stress, negatively affecting the performance of the crucible, etc.

Inactive Publication Date: 2010-09-22
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during pouring, the molten metal will come into contact with the top of the crucible, thus increasing the thermal stress that exists in this area of ​​the crucible
As previously stated, this thermal stress, and variations in thermal stress, can lead to crucible cracking, which can shorten crucible life and negatively affect crucible performance

Method used

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  • Fire-clay crucible capable of reacting thermal stress and being suitable for melting alloy with high activity
  • Fire-clay crucible capable of reacting thermal stress and being suitable for melting alloy with high activity
  • Fire-clay crucible capable of reacting thermal stress and being suitable for melting alloy with high activity

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Embodiment Construction

[0020] Embodiments described herein generally relate to refractory crucibles capable of handling thermal stresses generated during casting of high activity titanium alloys. More specifically, embodiments described herein generally relate to a refractory crucible capable of handling thermal stress and suitable for melting highly reactive alloys, comprising a surface coating portion, a backing, and at least a portion of at least one backing applied around the crucible The grommet includes a composition selected from the group consisting of conductive materials, non-conductive materials, and combinations thereof.

[0021] While the examples herein focus generally on crucibles suitable for melting TiAl for making near-pure shape airfoils, the description should not be limited thereto. Those skilled in the art will appreciate that this example may be suitable for melting any titanium alloy used in the manufacture of any near-net-shape gas turbine component where thermal stress is a...

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Abstract

The invention provides a fire-clay crucible (8) capable of reacting thermal stress and being suitable for melting alloy with high activity, which is provided with a surface coating part (16), a backing (22), and at least one retaining ring (30), wherein the retaining ring (30) is used for winding at least one part of the backing (22) of a crucible (8) and comprises the following components: conducting material, non-conducting material and the components selected from the combination of the two materials.

Description

technical field [0001] Embodiments described herein generally relate to crucibles capable of handling thermal stress. More specifically, the embodiments herein generally describe a refractory crucible having at least one guard ring for thermal stress handling, the crucible being suitable for melting highly reactive titanium alloys, such as titanium aluminum alloys and the like. Background of the invention [0002] Turbine engine designers are constantly searching for new materials for performance enhancements that reduce engine weight and achieve higher engine operating temperatures. Titanium alloys, and in particular, titanium aluminide (TiAl)-based alloys, have promising low-temperature mechanical properties such as room-temperature plasticity and toughness, as well as a combination of high- and high-temperature strength and creep resistance. For these reasons, TiAl-based alloys have the potential to replace the nickel-based superalloys currently used to manufacture a lar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27B14/10C22C1/02C22C14/00
Inventor B·P·布莱M·F·X·吉格利奥蒂M·拉曼T·J·凯利M·J·韦默S·森达拉姆
Owner GENERAL ELECTRIC CO