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Braze formulations and processes for making and using

A brazing and preparation technology, applied in the field of brazing preparations for super alloy products

Inactive Publication Date: 2009-05-06
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, boron can contribute to embrittlement phases in brazed parts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Brazing alloys were prepared by mixing together nickel, cobalt, chromium, aluminum, boron, tantalum and hafnium by arc melting the elements into a mixture having the quantities shown in Table 1 . The samples were subjected to DSC (Differential Scanning Calorimetry) tests, which are shown in Table 1. The DSC is a Netzsch Instrument STA 449C. The sample was ramped from ambient temperature to maximum temperature (1400°C) at 10°C / min and then cooled to ambient temperature.

Table 1

sample

[0057] The samples were subjected to a hammer impact test, which is a qualitative test in which the alloy is struck with a large, heavy hammer and the alloy is visually evaluated to determine the brittleness of the alloy at the location of the impact. Multiple impacts of the 51b hammer on samples 1-3 caused the samples to peen (partially yield) but not crack or pulverize.

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PUM

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Abstract

A braze formulation for superalloys including nickel, chromium, optionally, cobalt, optionally, aluminum, optionally, boron, hafnium and tantalum, said braze formulation having a solidus temperature of no greater than about 1180 DEG C and a liquidus temperature of no greater than about 1250 DEG C. Methods for brazing are also provided. The brazing formulations are robust with good ductility and have minimal embrittled phases or otherwise decreased braze integrity.

Description

technical field [0001] This invention relates to brazing formulations, and more particularly, to brazing formulations for superalloy articles. Background technique [0002] Brazing is a method of joining metal parts to one another, repairing cracks and other surface imperfections and damage, restoring surfaces to desired dimensions, and forming protective coatings on metal parts. Typically, the brazing formulation is inserted between the parts to be joined or applied to the parts to be repaired and heated to a temperature above the melting point of the brazing formulation to melt the brazing formulation, but sufficiently below the temperature of the parts being brazed. The solidus temperature to avoid damage and / or degrade the desired properties of the parts being brazed. The molten brazing material reacts with the parts to be joined or repaired to form a strong joint when the brazed parts are cooled. Although the base part is not melted, there is diffusion between the bas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/24
CPCB23K35/0244C22C19/051C22C19/056B23K35/304C22F1/10B23K35/0233C22C19/05C22C19/058C22C19/057B23K35/025B23K35/3033C22C1/0433C22C19/055
Inventor S·阿曼切拉L·克雷特尼
Owner GENERAL ELECTRIC CO