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Arc smelting preparation method of oxide-reinforced platinum-rhodium-based composite material

A composite material and arc melting technology, which is applied in the field of preparation of platinum-rhodium-based composite wire, can solve the problems that the density is not as good as smelting, affect the performance, and take a long time, etc., to achieve high density, uniform distribution, and high production efficiency Effect

Active Publication Date: 2019-07-12
KUNMING INST OF PRECIOUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the formation of oxides in such materials mainly adopts the addition of alloying elements, and then generates oxides through internal oxidation, or by adding corresponding oxides to alloy powders. The main disadvantage of internal oxidation is that the alloy needs to be smelted in advance, and It takes a lot of time to roll into thin sheets for long-term, high-temperature internal oxidation treatment, and then to perform lamination and hot-rolling treatment
The powder metallurgy method needs to mix different powders and prepare them into ingots. After that, repressing and refiring are required. There are many processes, and the material is loose, and the density is not as high as that of smelting, which will directly affect the performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Rhodium content 5%, ZrO 2 The content is 0.1%, the rare earth Y is 0.5%, and the balance is platinum.

[0024] The -100 mesh rhodium content prepared by chemical method is 5% platinum-rhodium alloy powder and -300 mesh rare earth Y powder, zirconia powder, the material composition weight percentage is: rare earth Y powder is: 1%, the oxide is ZrO 2 It is: 0.1% ratio is 20 grams in total, put it into the ball mill tank made of zirconia, at the speed of 100r / min, the alternation time is 1min, use zirconia balls, the ball-to-material ratio is 3:1, and ball mill for 1 hour Finally, a uniformly mixed platinum-rhodium composite powder material is obtained; the platinum-rhodium composite powder is placed in a mold for compression molding processing, the holding pressure is 30MPa, and the holding time is 30 minutes, and the rare earth-containing Y powder and zirconia powder are obtained. Powdered platinum-rhodium alloy composite material ingot;

[0025] Put the prepared plati...

Embodiment 2

[0027] Embodiment two: rhodium content is 5%, ZrO 2 The content is 0.3%, the rare earth Y is 3%, and the balance is platinum. The rhodium content of -100 mesh prepared by chemical method is 5% platinum-rhodium alloy powder and -300 mesh rare earth Y powder, zirconia powder, the material composition weight percentage is: rare earth Y powder is: 3%, the oxide is ZrO 2It is: 0.3% ratio is 30 grams in total, put it into a ball mill tank made of zirconia, at a speed of 400r / min, the alternating time is 1min, use zirconia balls, the ball-to-material ratio is 5:1, and ball mill for 1 hour Finally, a uniformly mixed platinum-rhodium composite powder material is obtained; the platinum-rhodium composite powder is placed in a mold for compression molding; the specific process is: the holding pressure is 40MPa, the holding time is 30 minutes, and the obtained platinum-rhodium composite powder Material ingot; put the ingot into the electric arc furnace for arc melting; the specific proces...

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Abstract

The invention discloses an arc smelting preparation method of an oxide-reinforced platinum-rhodium-based composite material. The arc smelting preparation method comprises the following steps that a platinum-rhodium alloy composite material ingot blank containing rare-earth Y powder and zirconium oxide powder is putted into an electric arc furnace to carry out electric arc smelting so as to obtaina button-shaped spindle; an X-ray fluorescence analyzer is used to measure whether the Zr content and the Y content on both sides of the spindle are uniform, wherein if the contents are not uniform, the bottom surface of the spindle is upward and arc smelting is carried out, and after smelting for many times, the Zr content and the Y content on both sides of the spindle are uniform; hot rolling iscarried out on the obtained spindle, and annealing treatment is then carried out; and then rolling, drawing and heat treatment are carried out to prepare a wire or sheet product, and an oxide-reinforced platinum-rhodium-based composite material product is obtained. The arc smelting preparation method has a simple preparation process, no pollution to the environment, controllable components of theprepared composite material, excellent comprehensive performance of the material and suitability for industrial production, and the obtained composite material can be applied to electric heating materials, electrode materials and the like.

Description

technical field [0001] The invention relates to a preparation method of a platinum-rhodium-based composite wire, belonging to the field of platinum-based materials. Such materials are mainly used in fields such as electric heating alloys, electrode materials, and high-temperature structural materials. Background technique [0002] Platinum-rhodium-based composite materials mainly include ZrO 2 , CeO 2 , Y 2 o 3 Platinum and platinum-rhodium-based composite materials strengthened by other oxides, due to their excellent internal corrosion, oxidation resistance, and creep resistance, are widely used in glass fiber manufacturing, crystal growth, heating wires, nozzles and other applications. [0003] The main microstructure characteristics of the composite material are: fine ZrO 2 , CeO 2 , Y 2 o 3 The oxide particles are dispersed in the alloy matrix and grain boundaries. Oxides can pin the grain boundaries and prevent dislocations from climbing, and at the same time h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C5/04C22C1/02C22C1/10C22F1/14
CPCC22C5/04C22C1/1036C22C1/1015C22F1/14C22C1/1047
Inventor 陈松王塞北谢明刘满门胡洁琼孙绍霞杨有才李爱坤陈永泰王松张吉明候攀方继恒陈赟马洪伟段云昭
Owner KUNMING INST OF PRECIOUS METALS
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