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A kind of platinum iridium zirconium tungsten thorium alloy solder and preparation method thereof

A zirconium-tungsten and platinum-iridium technology is applied in the field of platinum-iridium zirconium-tungsten-thorium alloy solder and its preparation, which can solve problems such as processing difficulties and achieve the effect of improving high-temperature mechanical properties

Active Publication Date: 2017-07-04
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although iridium is a platinum group metal with a face-centered cubic structure, it exhibits brittle fractures similar to metals with a body-centered cubic structure. It is difficult to process, and complex iridium alloy parts need to be welded. It is resistant to acid and alkali corrosion and high temperature oxidation, and the alloy solder with similar strength to the weld and iridium alloy is still in the blank

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The platinum-iridium-zirconium-tungsten-thorium alloy solder in this embodiment consists of the following components by mass percentage: Ir 16%, Zr 0.5%, W 0.2%, Th 0.06%, and the balance is Pt and unavoidable impurities.

[0025] The preparation method of the platinum-iridium-zirconium-tungsten-thorium alloy solder of the present embodiment comprises the following steps:

[0026] Step 1: Pt powder (particle size not greater than 74 μm, mass purity not less than 99.9%), Ir powder (particle size not greater than 74 μm, mass purity not less than 99.9%), Zr powder (particle size not greater than 74 μm, The mass purity is not less than 93%), W powder (particle size is not greater than 37 μm, mass purity is not less than 99.9%) and WTh4 powder are mixed evenly, and then placed in a vacuum oven to dry to obtain the mixed powder;

[0027] The WTh4 powder is prepared by a liquid-solid doping method, and the specific preparation process is as follows: WO 2.9 Immerse the powder ...

Embodiment 2

[0036] The platinum-iridium-zirconium-tungsten-thorium alloy solder in this embodiment is composed of the following components by mass percentage: Ir 16%, Zr 0.6%, W 0.1%, Th 0.06%, and the balance is Pt and unavoidable impurities.

[0037] The preparation method of the platinum-iridium-zirconium-tungsten-thorium alloy solder of the present embodiment comprises the following steps:

[0038] Step 1: Pt powder (particle size not greater than 74 μm, mass purity not less than 99.9%), Ir powder (particle size not greater than 74 μm, mass purity not less than 99.9%), Zr powder (particle size not greater than 74 μm, The mass purity is not less than 93%), W powder (particle size is not greater than 37 μm, mass purity is not less than 99.9%) and WTh4 powder are mixed evenly, and then placed in a vacuum oven to dry to obtain the mixed powder;

[0039] The WTh4 powder is prepared by a liquid-solid doping method, and the specific preparation process is as follows: WO 2.9 The powder was i...

Embodiment 3

[0048] The platinum-iridium-zirconium-tungsten-thorium alloy solder in this embodiment consists of the following components by mass percentage: Ir 16%, Zr 0.8%, W 0.1%, Th 0.06%, and the balance is Pt and unavoidable impurities.

[0049] The preparation method of the platinum-iridium-zirconium-tungsten-thorium alloy solder of the present embodiment comprises the following steps:

[0050] Step 1: Pt powder (particle size not greater than 74 μm, mass purity not less than 99.9%), Ir powder (particle size not greater than 74 μm, mass purity not less than 99.9%), Zr powder (particle size not greater than 74 μm, The mass purity is not less than 93%), W powder (particle size is not greater than 37 μm, mass purity is not less than 99.9%) and WTh4 powder are mixed evenly, and then placed in a vacuum oven to dry to obtain the mixed powder;

[0051] The WTh4 powder is prepared by a liquid-solid doping method, and the specific preparation process is as follows: WO 2.9 The powder was imme...

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Abstract

The invention provides platinum-iridium-zirconium-tungsten-thorium alloy welding flux. The iridium-zirconium-tungsten-thorium alloy welding flux comprises, by mass percent, 15%-18% of Ir, 0.5%-1% of Zr, 0.1%-0.5% of W, 0.04%-0.08% of Th and the balance Pt and inevitable impurities. The invention further provides a method for preparing the welding flux. The method comprises the following steps that firstly, Pt powder, Ir powder, Zr powder, W powder and WTh4 powder are evenly mixed through a wet process ball grinding method, and mixed powder is obtained through drying; secondly, isostatic compaction is conducted, and a pressed blank is obtained; thirdly, vacuum sintering treatment is conducted, and a sintered blank is obtained; and fourthly, multi-pass machining is conducted after heating, and the platinum-iridium-zirconium-tungsten-thorium alloy welding flux is obtained. Platinum serves as a main body of the welding flux, the iridium element, the zirconium element, the tungsten element and the thorium element are added, the welding flux is mainly used for welding iridium alloy components and parts, the mechanical performance of a welding line can be greatly improved, and the using period of the welding flux is long under the acid, alkaline, oxidizing and high-temperature conditions.

Description

technical field [0001] The invention belongs to the technical field of high-temperature-resistant alloy solder, and in particular relates to a platinum-iridium-zirconium-tungsten-thorium alloy solder and a preparation method thereof. Background technique [0002] Iridium alloys have been widely used in advanced engines, thermoelectric batteries for space environments, supersonic wind tunnel nozzles, and high-temperature temperature measurement protective sleeves due to their excellent properties such as oxidation resistance, corrosion resistance, and high-temperature strength. Although iridium is a platinum group metal with a face-centered cubic structure, it exhibits brittle fractures similar to metals with a body-centered cubic structure. It is difficult to process, and complex iridium alloy parts need to be welded. It is resistant to acid and alkali corrosion and high temperature oxidation, and the alloy solder with similar strength to iridium alloy is still in the blank....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C5/04C22C1/04B22F3/10B23K35/32
CPCB22F3/1007B22F2201/20B23K35/322C22C1/0466C22C5/04
Inventor 李增峰刘海彦葛渊汤慧萍向长淑张晗亮荆鹏石英谈萍黄愿平李红宝文佳艺
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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