Method for processing iridium alloy bar or plate

A technology of alloy rods and processing methods, applied in metal processing equipment, manufacturing tools, metal rolling, etc., can solve the problems of iridium alloy design performance cannot be realized, material surface pollution processing, poor environmental conditions, etc., and achieve high yield , the method is simple, the effect of good ductility

Active Publication Date: 2011-10-05
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional processing equipment for refractory metals has the ability to process iridium alloys, but due to poor environmental conditions, it is easy to cause surface contamination of materials and make processing impossible, so that the design performance of iridium alloys cannot be realized, and the yield is very low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] It is intended to process the smelted iridium alloy ingot of Φ52mm×120mm into the iridium alloy rod of Φ19.3mm. The calculated total processing rate is 62.89%, and the hot-rolled metal molybdenum plate with a thickness of 0.2mm is selected as the sheath material to clad and weld the smelted iridium alloy ingot to be processed; the smelted iridium alloy ingot coated with the hot-rolled metal molybdenum plate Heating in a hydrogen resistance furnace at 1750°C for 1 hour, and then drop-forging on a 1000Kg air forging hammer to a bar with a diameter of Φ20.3mm. The processing rate of the forging pass is controlled at 10%. The smelted iridium alloy ingot with hot-rolled metal molybdenum plate was heated at 1650°C for 10 minutes, and the final forging temperature was 1500°C; then the forged bar was annealed at 1350°C for 30 minutes to eliminate the processing stress; finally Soak the annealed bar in aqua regia (mixed with 65% nitric acid and 36% hydrochloric acid in a volume ...

Embodiment 2

[0025] It is intended to process the powder metallurgy iridium alloy ingot with a density of Φ48.1mm×70mm and a density of 95.6% into a Φ15mm iridium alloy rod. The calculated total processing rate is 68.8%, and the hot-rolled metal molybdenum plate with a thickness of 0.35mm is selected as the sheath material to clad and weld the powder metallurgy iridium alloy ingot to be processed; the powder metallurgy iridium alloy ingot coated with the hot-rolled metal molybdenum plate is The alloy ingot was heated in a hydrogen resistance furnace at 1700°C for 5 hours, and then dropped and forged on a 1000Kg air forging hammer to a bar with a diameter of Φ15.1mm. The processing rate of the forging pass was controlled at 20%. The powder metallurgy iridium alloy ingot coated with hot-rolled metal molybdenum plate was heated at 1600°C for 15 minutes, and the final forging temperature was 1350°C; the forged bar was then annealed at 1400°C for 60 minutes to eliminate machining Stress; finall...

Embodiment 3

[0028] It is intended to process a powder metallurgy iridium alloy ingot with a density of Φ75mm×90mm and a density of 95.2% into a Φ20mm iridium alloy rod. The calculated total processing rate is 73.3%, and the hot-rolled metal molybdenum plate with a thickness of 0.4mm is selected as the sheath material to clad and weld the powder metallurgy iridium alloy ingot to be processed; the powder metallurgy iridium alloy ingot coated with the hot-rolled metal molybdenum plate The alloy ingot was heated in a hydrogen resistance furnace at 1650°C for 3 hours, and then dropped on a 1000Kg air forging hammer to forge a bar with a diameter of Φ20.2mm. The processing rate of the forging pass was controlled at 30%. The powder metallurgy iridium alloy ingot coated with hot-rolled metal molybdenum plate was heated at 1550°C for 12 minutes, and the final forging temperature was 1150°C; the forged bar was then annealed at 1200°C for 45 minutes to eliminate machining Stress; finally, soak the a...

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Abstract

The invention discloses a method for processing an iridium alloy bar or plate. The method comprises the following steps of: wrapping and welding an iridium alloy to be processed by using a hot-rolled metal molybdenum plate as a wrapping material at first; placing the iridium alloy wrapped by the hot-rolled metal molybdenum plate into a hydrogen resistance furnace and heating; processing the heated iridium alloy wrapped by the hot-rolled metal molybdenum plate to obtain a bar or plate; annealing the obtained bar or plate; and finally immersing the annealed bar or plate into chloroazotic acid and eliminating the wrapped hot-rolled metal molybdenum plate so as to obtain the iridium alloy bar or plate. The method is simple and easy to implement, and no special equipment is needed; and by using the advantage of the metal molybdenum and adopting a wrapping technology, the iridium alloy is wrapped into the hot-rolled metal molybdenum plate, so the iridium alloy cannot be influenced by the environmental condition during processing, and the iridium alloy can be processed successfully.

Description

technical field [0001] The invention belongs to the technical field of processing alloy rods and plates, and in particular relates to a processing method for iridium alloy rods or plates. Background technique [0002] The research on iridium and iridium alloys has attracted much attention abroad. Countries such as the United States, Japan, and Russia have successively carried out research on the processing of iridium alloys, and have conducted in-depth research on the processing and preparation of iridium alloys such as smelting and hot extrusion. Since the 1960s, the United States has successfully developed the Ir-W-Th-Al alloy system, which has been used as a nuclear fuel cladding material in multiple deep space probes. Later, the Ir-W-Zr / Hf alloy system was developed and successfully applied. The iridium alloy melting and hot extrusion process is very mature in the United States. [0003] Iridium alloys have excellent properties such as oxidation resistance, corrosion r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P17/00B23K9/16B21J5/00B21B1/22
Inventor 张晗亮李增峰汤慧萍向长淑黄愿平陈斌科石英
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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