JP5273620B2 - Nickel base alloy - Google Patents

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

  The present invention relates to nickel-based alloys having silicon, aluminum and reactive elements as alloy components.

  Nickel-based alloys are used in particular for producing the electrodes of ignition elements of internal combustion engines. In this type of electrode wear, two damage mechanisms are observed: hot corrosion and spark erosion.

  The wear due to hot corrosion is measured at the test temperature set after the removal by means of material loss measurements and by metallographic tests.

  Spark erosion is material combustion, which is caused by sparks (Zuendfunke). During each spark flashover, a limited volume of material is melted out of the electrode and partially evaporated.

  For both damage mechanisms, the type of oxide layer formation has a special meaning.

  Various alloy elements are known for nickel-based alloys in order to achieve optimal oxide layer formation for specific applications. Thus, for example, aluminum has an advantageous effect on the oxide layer formation. It is also known that reactive elements can improve the adhesion of the oxide layer that is formed and can then improve the period of use.

  GB-A 2031950 makes a nickel alloy known, which is (by weight) about 0.2-3% Si, about 0.5% or less Mn, the following group: about 0.2-3% And at least two metals selected from the group consisting of about 0.2-3% Al and about 0.01-1% Y, the remainder being nickel.

  In DE-A 102 24 891, a nickel-based alloy is proposed, which is (by weight) 1.8-2.2% silicon, 0.05-0.1% yttrium and / or hafnium and / Or zirconium, 2 to 2.4% aluminum, remaining nickel. This type of alloy is processed only under difficult conditions with regard to this high aluminum and silicon content and is therefore not very suitable for technischen Grosseinsatz.

The object of the subject-matter according to the invention is to provide a nickel-based alloy which provides improved erosion- and oxidation resistance, while at the same time providing good formability and weldability with an improved service life of the produced component.

を含有するニッケルベース合金により達成される。 The purpose is mass%

Achieved with a nickel-based alloy containing

  Advantageous alternative forms of the inventive subject matter can be taken from the subclaims as follows.

With respect to reactive elements, therefore, three variants can be considered:
Y + Hf,
Y + La and Y + Hf + La.

  The nickel-based alloy according to the invention can advantageously be used as a raw material for spark plug electrodes for gasoline engines.

  By using the targeted adjustment of the elements Al, Si, Cr, Mn, Mg on the one hand and the reactive elements Y, Hf, La on the other hand, it is possible to simultaneously improve the period of use of the electrode material in each of these combinations. With good formability and weldability, it can be caused by improved spark erosion and oxidation resistance.

  The element Mg is of particular importance with regard to the binding of sulfur, so that a low sulfur content aimed here can be adjusted in the nickel-base alloy according to the invention.

  The advantageous aluminum content (in mass%) is advantageously in the range from 1.2 to 1.5%.

  The advantageous silicon content (in% by weight) is advantageously in the range from 1.2 to 1.8%, 1.2 to 1.5%, while this advantageous Mg content (in% by weight) Is adjusted to 0.008 to 0.05%.

FIG. 1 shows a material loss test at a temperature of 900 ° C. for an alloy according to Table 1. FIG. 2 shows the material loss test at a temperature of 1000 ° C. for the alloys according to Table 1.

  Table 1 shows, in contrast, five laboratory charges according to the present invention compared to two large industrial charges belonging to the state of the art.

  Laboratory charge 1132 shows one example in which a reactive element Y + Hf is added into a nickel base alloy according to the present invention.

  Laboratory charge 1140 illustrates one example where the reactive element Y + La is present in a nickel-based alloy according to the present invention.

  Laboratory charges 1141 and 1142 disclose examples in which Y + La + Hf as a reactive element is adjusted in a nickel-based alloy according to the present invention.

  FIGS. 1 and 2 show material loss tests at temperatures of 900 ° C. on the one hand and 1000 ° C. on the other hand for the alloys according to Table 1.

  Both of these comparative alloys already exhibit a pre-configured oxide layer delamination at 900 ° C. This certainly occurs for the alloys according to the invention at 1000 ° C., but not to the same extent as the comparative example.

Claims (12)

A l 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 up to 0.1%
Fe 0.02-0.2%
Mg 0.005-0.06%
Pb up to 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 Containing 0.05 to 0.10% Hf and 0.05 to 0.10% La (by weight),
Nickel-based alloy with the balance consisting of Ni and impurities conditioned to manufacture. Al 1.2- <2.0%
Si 1.2- <1.8%
C 0.001-0.05%
S 0.001-0.05%
Cr 0.03-0.1%
Mn 0.03-0.1%
Cu up to 0.1%
Fe 0.02-0.2%
Mg 0.005-0.06%
Pb up to 0.005%
Y 0.10 to 0.15% and Hf 0.05 to 0.10% (by mass)
The nickel-base alloy according to claim 1, comprising Ni residue and impurities conditioned for production. Al 1.2- <2.0%
Si 1.2- <1.8%
C 0.001-0.05%
S 0.001-0.05%
Cr 0.03-0.1%
Mn 0.03-0.1%
Cu up to 0.1%
Fe 0.02-0.2%
Mg 0.005-0.06%
Pb up to 0.005%
Y 0.10 to 0.15% and La 0.05 to 0.10% (by mass)
The nickel-base alloy according to claim 1, comprising Ni residue and impurities conditioned for production. Al 1.2- <2.0 %
Si 1.2- <1.8%
C 0.001-0.05%
S 0.001-0.05%
Cr 0.03-0.1%
Mn 0.03-0.1%
Cu up to 0.1%
Fe 0.02-0.2%
Mg 0.005-0.06%
Pb up to 0.005%
Y 0.10-0.15% and Hf 0.05-0.10% and La 0.05-0.10%
The nickel-base alloy according to claim 1, containing (in mass%). Al 1.2-1.5%
Si 1.2-1.5%
The nickel-based alloy according to claim 1, having a content (in mass%) of 5. Mg 0.008-0.05%
The nickel-base alloy according to any one of claims 1 to 5, having a content of Y + Hf 0.11-0.18%
Having a content of (in mass%), according to claim 1, wherein the nickel-based alloys. Y + La 0.11-0.18%
Having a content of (in mass%), according to claim 1, wherein the nickel-based alloys. Y + Hf + La 0.18-0.22%
Having a content of (in mass%), according to claim 1, wherein the nickel-based alloys. Y + Mg 0.11-0.13%
Nickel-based alloy according to any one of claims 1 to 9, having a content of The nickel-base alloy according to any one of claims 1 to 10, further comprising a Ti content (in mass%) of at most 0.1% .   Use of a nickel-based alloy according to any one of claims 1 to 11 as electrode material for an ignition element of an internal combustion engine.

Images