A kind of preparation method of zirconia molybdenum alloy electrode

A technology of molybdenum alloy and zirconia, which is applied in the field of preparation of zirconia-molybdenum alloy electrodes, can solve the problems that molybdenum electrodes are prone to embrittlement and fracture, the recrystallization temperature of pure molybdenum electrodes is low, and affect the normal development of industrial production. The preparation method is easy to control, the glass erosion resistance is good, and the operation is simple

Active Publication Date: 2016-08-17
JINDUICHENG MOLYBDENUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A kind of preparation method of zirconia molybdenum alloy electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment includes the following steps:

[0027] Step 1, with 30kg molybdenum powder and 255g analytical pure ZrO 2 The powder is placed in a V-type mixer and mixed evenly to obtain Mo-ZrO 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 ;

[0028] Step 2, the Mo-ZrO described in the step 1 is prepared by cold isostatic pressing 2 Alloy powder pressed into Mo-ZrO 2 Alloy rod; the pressing pressure is 180MPa, and the holding time is 8min;

[0029] Step 3, Mo-ZrO described in step 2 2 The alloy rod is placed in a medium-frequency induction sintering furnace, kept and sintered at 1980°C for 6 hours, and cooled with the furnace to obtain Φ110mm and a density of 9.75g / cm 3 Mo-ZrO 2 Sintered alloy rod;

[0030] Step 4, Mo-ZrO described in step 3 2 The sintered alloy rod was placed in a muffle furnace, heated to 1450 °C under the protection of hydrogen, and then kept for 90 minutes. The Mo-...

Embodiment 2

[0035] This embodiment includes the following steps:

[0036] Step 1, 30kg molybdenum powder and 900g analytical pure ZrO 2 The powder is placed in a V-type mixer and mixed evenly to obtain Mo-ZrO 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 ;

[0037] Step 2, the Mo-ZrO described in the step 1 is prepared by cold isostatic pressing 2 Alloy powder pressed into Mo-ZrO 2 Alloy rod; the pressing pressure is 200MPa, and the holding time is 10min;

[0038] Step 3, Mo-ZrO described in step 2 2 The alloy rod is placed in a medium-frequency induction sintering furnace, kept and sintered at 2000°C for 7 hours, and cooled with the furnace to obtain Φ200mm and a density of 9.45g / cm 3 Mo-ZrO 2 Sintered alloy rod;

[0039] Step 4, Mo-ZrO described in step 3 2 The sintered alloy rod was placed in a muffle furnace, heated to 1470 °C under the protection of argon, and then kept for 90 minutes. The Mo-ZrO 2...

Embodiment 3

[0044] This embodiment includes the following steps:

[0045] Step 1, 30kg molybdenum powder and 1500g analytical pure ZrO 2 The powder is placed in a V-type mixer and mixed evenly to obtain Mo-ZrO 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 ;

[0046] Step 2, the Mo-ZrO described in the step 1 is prepared by cold isostatic pressing 2 Alloy powder pressed into Mo-ZrO 2 Alloy rod; the pressing pressure is 190MPa, and the holding time is 10min;

[0047] Step 3, Mo-ZrO described in step 2 2 The alloy rod is placed in a medium-frequency induction sintering furnace, kept and sintered at 2100°C for 8 hours, and cooled with the furnace to obtain Φ48mm and a density of 9.33g / cm 3 Mo-ZrO 2 Sintered alloy rod;

[0048] Step 4, Mo-ZrO described in step 3 2 The sintered alloy rod was placed in a muffle furnace, heated to 1480 °C under the protection of hydrogen, and then kept for 60 minutes. The Mo-ZrO...

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Abstract

The invention discloses a preparing method of a zirconium oxide molybdenum alloy electrode. The method comprises the steps that first, molybdenum powder and ZrO2 powder are evenly mixed, and alloy powder is obtained; second, the alloy powder is pressed into an alloy rod by isostatic cool pressing; third, the alloy powder is placed in a medium-frequency inducing sintering furnace for sintering, and a sintered alloy rod is obtained; fourth, the sintered alloy rod is placed in a muffle furnace for heat temperature, the sintered alloy rod obtained after heat temperature is subjected to multi-heating-number forging, and a forged alloy rod is obtained; the forged alloy rod is subjected to machining, and a molybdenum alloy electrode semi-finished product is obtained; and sixth, the molybdenum alloy electrode semi-finished product is subjected to stress relieving annealing, and the finished product zirconium oxide molybdenum alloy electrode is obtained. The zirconium oxide molybdenum alloy electrode prepared with the method is high in recrystallization temperature, the recrystallization temperature is higher than 1250 DEG C, glass erosion performance is good, the service life is longer than that of a pure molybdenum electrode by at least 25%, a glass solution cannot be polluted, and coloring is avoided.

Description

technical field [0001] The invention belongs to the technical field of alloy electrode preparation, and in particular relates to a preparation method of a zirconia-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 redu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F3/16C22F1/18C03B5/02
Inventor 卜春阳张晓武洲庄飞
Owner JINDUICHENG MOLYBDENUM CO LTD
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