Nickel-Based Alloy

Inactive Publication Date: 2010-01-07
OUTOKUMPU VDM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009]The object of the inventive subject-matter is to provide a nickel-based alloy that can be used to increase the life cycle of components produced therefrom by increasing resistance to spark erosion and oxidation while simultaneously providing good formability and weldability.
[0069]Selectively adjusting the elements Al, Si, Cr, Mn, and Mg, as well as the reactive elements Y, Hf, La in their respective combinations can bring about an increased life cycle for electrode materials by increasing the spark erosion resistance and oxidation resistance while simultaneously promoting formability and weldability.

Problems solved by technology

Two damaging mechanisms affect the wear of such electrodes, specifically high temperature corrosion and spark erosion.
The type of oxide layer formation is particularly significant for both damaging mechanisms.
It is very difficult to process such alloys given the high aluminum and silicon content and they are thus not well suited for use on an industrial scale.

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0074]The table compares five inventive laboratory batches to two industrial batches belonging to the prior art.

[0075]Laboratory batch 1132 is an example in which the reactive elements Y+Hf are provided in the inventive nickel-based alloy.

[0076]Laboratory batch 1140 is an example in which the reactive elements Y+La are present in the inventive alloy.

[0077]Laboratory batches 1141 and 1142 disclose examples in which Y+La+Hf were adjusted as reactive elements in the inventive nickel-based alloy.

Ele-LBLBLBLBment1132114011411142NiCr2MnSiNiAl1Si1YNi96.8396.9196.8996.7996.2497.56Si1.471.361.361.420.490.96Al1.381.431.441.400.020.98ZrY0.150.120.140.130.17Hf0.080.0780.073La0.090.0960.096Ti0.10.010.01C0.0020.0060.0040.0030.0030.03S0.0020.0020.0020.0020.0020.002Co0.040.05Cu0.010.01Cr0.040.030.060.041.570.01Zr0.01Mg0.020.030.010.030.020.04Mn0.060.030.030.061.480.02Fe0.030.030.030.040.080.13Pb0.0010.001

[0078]FIGS. 1 and 2 depict weight loss examinations for the alloys in accordance with the table...

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Abstract

Nickel-based alloy, consisting of (in % by mass) Al 1.2-<2.0% Si 1.2-<1.8% C 0.001-0.1% S 0.001-0.1% Cr 0.03-0.1% Mn 0.03-0.1% Cu max. 0.1% Fe 0.02-0.2% Mg 0.005-0.06% Pb max. 0.005% Y 0.05-0.15% and Hf 0.05-0.10% or Y 0.05-0.15% and La 0.05-0.10% or Y 0.05-0.15% and Hf 0.05-0.10% and La 0.05-0.10% Ni remainder together with manufacturing-related impurities.

Description

BACKGROUND OF THE INVENTION[0001]The invention relates to a nickel-based alloy having silicon, aluminum, and reactive elements as alloy components.[0002]Nickel-based alloys are used inter alia for producing electrodes for ignition elements in internal combustion engines. Two damaging mechanisms affect the wear of such electrodes, specifically high temperature corrosion and spark erosion.[0003]Wear from high temperature corrosion can be determined by measuring losses in weight and using metallographic examinations after exposure to pre-specified testing temperatures.[0004]Spark erosion is combustion of material that is caused by ignition sparks. With each flashover, a limited volume of electrode material is melted and in part evaporated.[0005]The type of oxide layer formation is particularly significant for both damaging mechanisms.[0006]Different alloy elements for nickel-based alloys are known for attaining optimum oxide layer formation for the specific application. Thus, for insta...

Claims

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Application Information

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IPC IPC(8): C22C19/05
CPCC22C19/058C22C19/03
InventorKLOEWER, JUTTASCHEIDE, FRANK
OwnerOUTOKUMPU VDM GMBH