A kind of arc melting preparation method of oxide strengthened platinum-rhodium matrix composite material

Abstract

The invention discloses an arc smelting preparation method of an oxide-reinforced platinum-rhodium-based composite material, which comprises: putting a platinum-rhodium alloy composite material ingot containing rare earth Y powder and zirconia powder into an electric arc furnace, and performing arc smelting to obtain Button-shaped ingot; use X-ray fluorescence analysis instrument to measure whether the Zr and Y content on both sides of the ingot is uniform, if not, place the bottom of the ingot upwards and perform arc melting. After several times of melting, the Zr and Y content on both sides of the ingot will be uniform; The obtained ingot is hot-rolled and then annealed; then rolled, drawn and heat-treated to prepare a wire or sheet product to obtain an oxide-reinforced platinum-rhodium-based composite product. The invention has simple preparation process, no pollution to the environment, controllable composition of the prepared composite material, excellent comprehensive performance of the material, and is suitable for industrial production. The obtained composite material can be applied to electrothermal 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...

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.