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Electrode materials of composite rare-earth iridium alloy and sparking plug of using the electrode materials

A technology of composite rare earth and alloy electrodes, which is applied in the field of spark plugs, can solve the problems of difficult price advantage, insignificant improvement of processing performance, high material cost, etc., achieve superior cost performance, improve high temperature acid corrosion resistance, and improve overall performance.

Active Publication Date: 2011-03-30
昆明富尔诺林科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the improvement of the processing performance of the above materials is not significant, and the material cost is relatively high. Compared with platinum-based spark plug electrodes, it is difficult to reflect the price advantage

Method used

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  • Electrode materials of composite rare-earth iridium alloy and sparking plug of using the electrode materials
  • Electrode materials of composite rare-earth iridium alloy and sparking plug of using the electrode materials
  • Electrode materials of composite rare-earth iridium alloy and sparking plug of using the electrode materials

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Effect test

Embodiment 1

[0027] (1) The surface hardness of the finished electrode material wire material obtained in this embodiment is 150-160Hv (Φ0.5mm), and the tensile strength is 2250-2550N / mm 2 , the elongation is 5%.

[0028] (2) The tensile fracture is mainly along the grain boundary, and the energy spectrum detection shows that the fracture along the grain boundary contains a certain amount of oxygen, calcium and carbon. Such as figure 1 As shown, there are obvious oxide particles precipitated in the microstructure, and the particle size is small.

[0029] In the spark plug in this embodiment, the ignition tips of the central electrode and the side electrode are the above-mentioned wire material alloys in this embodiment.

Embodiment 2

[0031] (1) The surface hardness of the finished electrode material wire obtained in this example is 160-170Hv (Φ0.5mm), and the tensile strength is 2050-2250N / mm 2 , the elongation is 3%.

[0032] (2) The tensile fracture is mainly along the grain boundary, and the energy spectrum detection shows that the oxygen content in the fracture along the grain boundary is high. Such as figure 2 As shown, there are obvious oxide particles precipitated in the microstructure, because the addition of rare earth elements is more, so there are more precipitated oxide particles.

[0033] In the spark plug in this embodiment, the ignition tips of the central electrode and the side electrode are the above-mentioned wire material alloys in this embodiment.

Embodiment 3

[0035] (1) The surface hardness of the finished electrode material wire material obtained in this embodiment is 150-160Hv (Φ0.5mm), and the tensile strength is 2250-2550N / mm 2 , the elongation is 8%.

[0036] (2) The tensile fracture is mainly along the grain boundary, and the energy spectrum detection shows that the fracture along the grain boundary contains a certain amount of oxygen. Such as image 3 As shown, with the addition of Th and Al elements, it can be clearly seen that bright white metal elements are precipitated at the grain boundaries and distributed along the grain boundaries, which is conducive to the strengthening of the grain boundaries, which illustrates the obtained in this implementation. The composite rare earth iridium alloy, adding an appropriate amount of rare earth elements and trace metal elements, can eliminate impurities and improve the physical and processing properties of the material.

[0037] In the spark plug in this embodiment, the ignition...

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Abstract

The present invention discloses an electrode materials of composite rare-earth iridium alloy that is a noble metal alloy containing Ir. The noble metal alloy contains 99.5-99.9 wt% Ir and 0.10-0.50 wt% X; the X is one or a mixture of some of the La, Nd, Pr, Y, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Ce; the noble metal alloy can also contains Th and Al added at the same time. The invention also discloses a sparking plug of composite rare-earth iridium alloy, includes a center electrode and at least a lateral electrode, ignition tip of the center electrode and / or the lateral electrode is the noble metal alloy. The invention provided electrode materials has advantage of high-temperature resistance, strong high-temperature corrosion resistance and excellent performance price ratio; sparking plug of using the electrode materials can provide strong spark on time even the motor is in high-speed, high-temperature high-pressure condition.

Description

technical field [0001] The present invention relates to a spark plug of an internal combustion engine, in particular, the present invention relates to a spark plug electrode material and a spark plug using the electrode material. Background technique [0002] The spark plug is an important component of the internal combustion engine, and its product performance depends largely on the spark plug electrode material. When the spark plug of an internal combustion engine is working, whether it is a blazing ignition type heating wire or a discharge electrode of an electric spark ignition method, the electrode will generate sparks during discharge and acidification corrosion loss under high temperature combustion. The pure iridium metal spark plug has basically no loss after driving 100,000 kilometers on the general road, and has good anti-spark loss performance. However, pure iridium metal spark plugs have poor corrosion resistance at high temperatures, especially when driving un...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C5/04H01T13/39
Inventor 周川周勇马梦一杨喜昆
Owner 昆明富尔诺林科技发展有限公司
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