Preparation method for molybdenum alloy electrode

A molybdenum alloy and electrode technology, which is applied in the field of preparation of molybdenum alloy electrodes, can solve the problems of accelerated molybdenum electrode erosion, shortened service life of pure molybdenum electrodes, falling and other problems, and achieves the effects of easy preparation method, guaranteed glass quality and simple operation.

Active Publication Date: 2015-04-22
JINDUICHENG MOLYBDENUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low recrystallization temperature of pure molybdenum electrodes, the existence of some components in the glass melt at high temperatures, especially some additives such as clarifiers and decolorizers, will accelerate the erosion of molybdenum electrodes, making molybdenum electrodes prone to embrittlement at high temperatures and fracture, even falling into the molten glass solution, which seriously affects the normal development of industrial production and directly leads to the reduction of the service life of pure molybdenum electrodes

Method used

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  • Preparation method for molybdenum alloy electrode
  • Preparation method for molybdenum alloy electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment includes the following steps:

[0028] Step 1, 30kg molybdenum powder and 192g analytically pure ZrH 2 The powder is placed in a V-type mixer and mixed evenly to obtain Mo-ZrH 2 Alloy powder; the average Fischer particle size of the molybdenum powder is 1.5 μm, and the bulk density is 0.90 g / cm 3 ;

[0029] Step 2, using cold isostatic pressing to make the Mo-ZrH described in step 1 2 Alloy powder pressed into Mo-ZrH 2 Alloy rod; the pressing pressure is 180MPa, and the holding time is 8min;

[0030] Step 3, Mo-ZrH described in step 2 2 The alloy rod is placed in a medium-frequency induction sintering furnace, and the temperature of the medium-frequency induction sintering furnace is raised to 1980°C and then kept for 6 hours. After cooling in the furnace, Φ110mm is obtained, and the density is 9.75g / cm 3 Mo-ZrO 2 Sintering alloy rods; during the heating process, control the heating time of the intermediate frequency induction sintering furnace fr...

Embodiment 2

[0036] This embodiment includes the following steps:

[0037] Step 1, 30kg molybdenum powder and 681g analytical pure ZrH 2 The powder is placed in a V-type mixer and mixed evenly to obtain Mo-ZrH 2 Alloy powder; the average Fischer particle size of the molybdenum powder is 2.85 μm, and the bulk density is 1.08 g / cm 3 ;

[0038] Step 2, using cold isostatic pressing to make the Mo-ZrH described in step 1 2 Alloy powder pressed into Mo-ZrH 2 Alloy rod; the pressing pressure is 200MPa, and the holding time is 10min;

[0039]Step 3, Mo-ZrH described in step 2 2 Alloy rods are placed in a medium frequency induction sintering furnace, and the temperature of the medium frequency induction sintering furnace is raised to 2000°C, and then kept for 7 hours, and then cooled with the furnace to obtain Φ200mm and a density of 9.45g / cm 3 Mo-ZrO 2 Sintering alloy rods; during the heating process, control the heating time of the intermediate frequency induction sintering furnace from 8...

Embodiment 3

[0045] This embodiment includes the following steps:

[0046] Step 1, with 30kg molybdenum powder and 1135g analytical pure ZrH 2 The powder is placed in a V-type mixer and mixed evenly to obtain Mo-ZrH 2 Alloy powder; the average Fischer particle size of the molybdenum powder is 3.32 μm, and the bulk density is 1.16 g / cm 3 ;

[0047] Step 2, using cold isostatic pressing to make the Mo-ZrH described in step 1 2 Alloy powder pressed into Mo-ZrH 2 Alloy rod; the pressing pressure is 190MPa, and the holding time is 10min;

[0048] Step 3, Mo-ZrH described in step 2 2 The alloy rod is placed in a medium-frequency induction sintering furnace, and the temperature of the medium-frequency induction sintering furnace is raised to 2100°C and then kept for 8 hours. After cooling in the furnace, Φ48mm is obtained, and the density is 9.33g / cm 3 Mo-ZrO 2 Sintered alloy rods; during the heating process, control the heating time of the intermediate frequency induction sintering furnac...

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Abstract

The invention discloses a preparation method for a molybdenum alloy electrode, the method comprises the steps that firstly, molybdenum powder and ZrH2 powder are mixed evenly to obtain alloy powder; secondly, an alloy bar is obtained by compressing the alloy powder through isostatic cool pressing; thirdly, the alloy bar is placed into a medium-frequency induction sintering furnance, heat preservation is conducted after heating up, and a sintered alloy bar is obtained; fourthly, the sintered alloy bar is placed into a muffle furnace for heating and heat preservation, repeated firing forging is conducted on the sintered alloy bar subjected to heat preservation, and a forged alloy bar is obtained; fifthly, the forged alloy bar is machined, and a semi-finished product of the molybdenum alloy electrode is obtained; sixthly, stress relief annealing is conducted on the semi-finished product of the molybdenum alloy electrode, and a finished product of the molybdenum alloy electrode is obtained. The molybdenum alloy electrode prepared by the preparation method has the advantages that the recrystallization temperature is high, the high temperature mechanical properties are good, the recrystallization temperature can be greater than 1250 DEG C, the glass erosion resistance property is good, the service life is prolonged by more than 25% compared with a pure molybdenum electrode, and a glass solution cannot be polluted and colored.

Description

technical field [0001] The invention belongs to the technical field of alloy electrode preparation, and in particular relates to a method for preparing a molybdenum alloy electrode. Background technique [0002] Molybdenum is a refractory metal with high high-temperature mechanical properties, good heat transfer and electrical conductivity, low expansion coefficient and non-coloring properties. It is the most widely used electrode material in electric melting furnaces in the glass industry. Due to the low recrystallization temperature of pure molybdenum electrodes, the existence of some components in the glass melt at high temperatures, especially some additives such as clarifiers and decolorizers, will accelerate the erosion of molybdenum electrodes, making molybdenum electrodes prone to embrittlement at high temperatures And break, even drop into the molten glass solution, seriously affect the normal development of industrial production, directly lead to the reduction of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/16B22F3/24C22F1/18C03B5/02
Inventor 卜春阳
Owner JINDUICHENG MOLYBDENUM CO LTD
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