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A kind of nickel hafnium alloy and preparation method thereof

A technology of alloys and alloy ingots, which is applied in the non-ferrous field and can solve the problems that fine particles cannot meet the sponge industry standards

Active Publication Date: 2020-07-07
全南晶环科技有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Sponge hafnium is a spongy metal hafnium obtained by chlorinating and purifying hafnium oxide to obtain refined hafnium tetrachloride, and reducing refined hafnium tetrachloride with magnesium at high temperature, referred to as hafnium sponge; during the production process, both The edge leather will also produce 5% to 10% of 1mm to 3mm fine particles, which cannot meet the YST 399-2013 sponge hafnium industry standard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Prepare a zirconia surface ceramic shell stabilized by a calcium oxide stabilizer as a crucible for vacuum induction melting of a nickel-hafnium alloy; put 880g of sponge hafnium and 120g of nickel mixture into the ceramic shell crucible, and place the crucible filled with nickel-hafnium mixture Put it into the vacuum induction melting furnace, evacuate until the vacuum degree in the melting furnace is below 4Pa, then fill the argon protective gas to 10KPa, start the heating system, the current opening is 22%, the power is 4kW, the nickel and hafnium metal is heated to Melting began at 100s, the metal softened and collapsed at 120s, and completely melted at 185s; the gas adsorbed in the hafnium sponge was effectively volatilized during the melting period. After all the nickel and hafnium materials in the furnace are cleared and the surface of the melt is calm, increase the current opening to 27%, and the power is 6kW, and enter the refining period and maintain it for 120...

Embodiment 2

[0033] Prepare the zirconia surface layer ceramic shell stabilized by magnesium oxide stabilizer as the crucible for vacuum induction melting of nickel-hafnium alloy; put 900g sponge hafnium hafnium and 100g nickel mixture into the ceramic shell crucible, put the Put the crucible into the vacuum induction melting furnace, evacuate until the vacuum degree in the melting furnace is below 4Pa, then fill the argon protective gas to 10KPa, start the heating system, the current opening is 22%, the power is 4kW, the nickel and hafnium metal is heating Melting began at 110s, the metal softened and collapsed at 140s, and completely melted at 190s; the gas adsorbed in the hafnium sponge was effectively volatilized during the melting period. After all the nickel and hafnium materials in the furnace are cleared and the surface of the melt is calm, increase the current opening to 27%, and the power is 6kW. It starts to enter the refining period and maintains it for 130s. During the refining...

Embodiment 3

[0035]Prepare the zirconia surface ceramic shell stabilized by yttrium oxide stabilizer as the crucible for vacuum induction melting of nickel-hafnium alloy; put 920g hafnium sponge and 80g nickel mixture into the ceramic shell crucible, and put the crucible filled with nickel-hafnium mixture Put it into the vacuum induction melting furnace, evacuate until the vacuum degree in the melting furnace is below 4Pa, then fill the argon protective gas to 10KPa, start the heating system, the current opening is 22%, the power is 4kW, the nickel and hafnium metal is heated to Melting began at 120s, the metal softened and collapsed at 140s, and completely melted at 200s; the gas adsorbed in the hafnium sponge was effectively volatilized during the melting period. After all the nickel and hafnium materials in the furnace are cleared and the surface of the melt is calm, increase the current opening to 27%, and the power is 6kW. It starts to enter the refining period and maintains it for 140...

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Abstract

The invention discloses a nickel-hafnium alloy and a preparation method thereof. The alloy comprises, by weight, 80%-94% of hafnium and the balance nickel. The preparation method of the nickel-hafniumalloy comprises the following steps that 1) the raw materials including sponge hafnium and the nickel are prepared; 2) the sponge hafnium and nickel are subjected to mixing according to a certain proportion, and is subjected to forming to obtain a nickel-hafnium mixture; 3) a zirconia surface ceramic shell stabilized through an oxide stabilizer is used as a crucible for nickel-hafnium alloy vacuum induction smelting; 4) the crucible loaded with the nickel-hafnium mixture is placed into a vacuum induction smelting furnace for heating and melting; 5) when alloy liquid becomes clear, the currentof the vacuum induction smelting furnace is increased, refining and uniformizing are performed on the alloy liquid, and alloy ingots are taken out of the furnace after being cooled below 300 DEG C; 6) the alloy ingots are cooled to the room temperature after being taken out of the furnace, the ceramic shell crucible is crushed, and nickel-hafnium alloy ingots are obtained; and 7) surface treatment is performed on the nickel-hafnium alloy ingots after crushing, and qualified nickel-hafnium alloy ingots are obtained. According to the nickel-hafnium alloy and the preparation method thereof, thenickel-hafnium alloy is prepared by using the sponge hafnium, the hafnium machining and application process is shortened, and hafnium loss is reduced.

Description

technical field [0001] The invention relates to the field of nonferrous technology, in particular to a nickel-hafnium alloy and a preparation method thereof. Background technique [0002] Sponge hafnium is a spongy metal hafnium obtained by chlorinating and purifying hafnium oxide to obtain refined hafnium tetrachloride, and reducing refined hafnium tetrachloride with magnesium at high temperature, referred to as hafnium sponge; during the production process, both The edge leather will also produce 5% to 10% of 1mm to 3mm fine particles, which cannot meet the YST 399-2013 sponge hafnium industry standard. [0003] High-temperature alloys refer to high-alloyed iron-based, nickel-based, cobalt-based austenitic metal materials that withstand relatively large and complex stresses and have certain surface stability under high temperature conditions of 600°C or above. It has good high temperature strength and high temperature creep properties, excellent corrosion resistance and a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C28/00C22C1/02
CPCC22C1/02C22C28/00
Inventor 郭树军钟月明邱日安邬元旭
Owner 全南晶环科技有限责任公司