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Method for processing iridium alloy bar or plate

An alloy sheet and processing method technology, applied in metal processing equipment, manufacturing tools, metal rolling and other directions, can solve the problems of low yield, poor environmental conditions, material surface pollution processing, etc., to achieve excellent performance, good ductility, The effect of high yield

Active Publication Date: 2012-12-05
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] I want to process a smelted iridium alloy ingot of Φ52mm×120mm into an iridium alloy rod of Φ19.3mm. The calculated total processing rate is 62.89%. The hot-rolled molybdenum plate with a thickness of 0.2mm is selected as the sheathing material to cover and weld the smelted iridium alloy ingot to be processed; the smelted iridium alloy ingot covered with the hot-rolled molybdenum plate Heated in a hydrogen resistance furnace at 1750°C for 1 hour, and then die forged to a bar with a diameter of Φ20.3mm on a 1000Kg air forging hammer. The forging pass processing rate is controlled at 10%. Each time the forging is completed, the coating The smelted iridium alloy ingots with hot-rolled metal molybdenum plates are heated at a temperature of 1650°C for 10 minutes, and the final forging temperature is 1500°C; then the forged bars are annealed at 1350°C for 30 minutes to eliminate processing stress; The annealed bar is soaked in aqua regia (mixed with 65% by mass concentration o...

Embodiment 2

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

Embodiment 3

[0028] It is intended to process a powder metallurgy iridium alloy ingot with a density of Φ75mm×90mm with a density of 95.2% into a Φ20mm iridium alloy rod. The calculated total processing rate is 73.3%. The hot-rolled molybdenum metal plate with a thickness of 0.4mm is selected as the sheathing material to cover and weld the powder metallurgy iridium alloy ingot to be processed; the powder metallurgical iridium coated with the hot-rolled metal molybdenum plate The alloy ingot is heated in a hydrogen resistance furnace at 1650°C for 3 hours, and then it is forged on a 1000Kg air forging hammer to a rod with a diameter of 20.2mm. The forging pass processing rate is controlled at 30%. Each time a forging is completed, the The powder metallurgy iridium alloy ingot covered with hot-rolled molybdenum plate is heated at 1550℃ for 12min, and the final forging temperature is 1150℃; then the forged bar is annealed at 1200℃ for 45min to eliminate processing Stress; Finally, the annealed...

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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 alloy bar and sheet processing, and specifically relates to a processing method of an iridium alloy bar or sheet. Background technique [0002] Research on iridium and iridium alloys has always attracted much attention abroad. The United States, Japan, Russia and other countries 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 melting and hot extrusion. Since the 1960s, the United States has successfully developed the Ir-W-Th-Al alloy system, which is used as a nuclear fuel cladding material for multiple deep space detectors. Later, the Ir-W-Zr / Hf alloy system was developed and successfully applied. The smelting and hot extrusion process of iridium alloy is very mature in the United States. [0003] Iridium alloy has excellent properties such as oxidation resistance, corrosion resistance,...

Claims

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Application Information

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Patent Type & Authority Patents(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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