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Method for preparing TZM alloy material through spray drying

An alloy material and drying technology, which is applied in the field of TZM alloy material preparation, can solve the problems of difficult control of carbon content and high oxygen content of TZM alloy, and achieve the effect of reducing oxygen content and uniform chemical composition

Active Publication Date: 2013-09-04
JINDUICHENG MOLYBDENUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The TZM alloy prepared by this method has problems such as difficult control of carbon content and high oxygen content.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Step 1, 3000g of molybdenum powder with a Fisherman's particle size of 3.5μm, 17.66g of titanium hydride powder with a Fisher's particle size of 2.0μm, 3.84g of zirconium hydride powder with a Fisher's particle size of 3.0μm and 4.54g of -325 mesh carbon powder are placed in the Mix evenly in a three-dimensional mixer to obtain a mixture, and the mixing time is 1h;

[0027] Step 2. Dissolve 30g of polyethylene glycol (or polyvinyl butyral resin) in 3000mL of absolute ethanol (or other organic solvents that can dissolve organic binders, such as acetone, methyl ethyl ketone, etc.), to prepare into solution;

[0028] Step 3, adding the mixture described in step 1 into the solution described in step 2 and stirring evenly to obtain a slurry, and using a closed cycle spray dryer to spray dry the slurry to obtain alloy powder; The temperature at the tuyere is 155°C, and the temperature at the air outlet is 100°C; the rotational speed of the spray drying centrifugal atomizing ...

Embodiment 2

[0032] Step 1, 3000g of molybdenum powder with a Fisher's particle size of 5.0 μm, 16.5 g of titanium hydride powder with a Fisher's particle size of 5.0 μm, 3.0 g of zirconium hydride powder with a Fisher's particle size of 5.0 μm and 3.64 g of -325 mesh carbon powder are placed in the Mix evenly in a three-dimensional mixer to obtain a mixture, and the mixing time is 0.5h;

[0033] Step 2. Dissolve 45g of polyethylene glycol (or polyvinyl butyral resin) in 3000mL of absolute ethanol (or other organic solvents that can dissolve organic binders, such as acetone, methyl ethyl ketone, etc.), to prepare into solution;

[0034] Step 3, adding the mixture described in step 1 into the solution described in step 2 and stirring evenly to obtain a slurry, and using a closed cycle spray dryer to spray dry the slurry to obtain alloy powder; The temperature at the tuyere is 165°C, and the temperature at the air outlet is 110°C; the rotational speed of the centrifugal atomizing disc for t...

Embodiment 3

[0038] Step 1, 3000g of molybdenum powder with a Fisher’s particle size of 2.0 μm, 15.1 g of titanium hydride powder with a Fisher’s particle size of 3.0 μm, 3.0 g of zirconium hydride powder with a Fisher’s particle size of 2.0 μm and 2.35 g of -325 mesh carbon powder are placed in the Mix evenly in a three-dimensional mixer to obtain a mixture, and the mixing time is 2 hours;

[0039] Step 2. Dissolve 75g polyvinyl butyral resin (or polyethylene glycol) in 3000mL acetone (or other organic solvents that can dissolve organic binders, such as ethanol, methyl ethyl ketone, etc.) to prepare a solution ;

[0040] Step 3, adding the mixture described in step 1 into the solution described in step 2 and stirring evenly to obtain a slurry, and using a closed cycle spray dryer to spray dry the slurry to obtain alloy powder; The temperature at the tuyere is 145°C, and the temperature at the air outlet is 90°C; the rotational speed of the centrifugal atomizing disc for the spray drying ...

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Abstract

The invention discloses a method for preparing a TZM alloy material through spray drying. The method comprises the following steps: 1, placing molybdenum powder, titanium hydride powder and zirconium hydride in a mixer, and uniformly mixing to obtain a mixture; 2, dissolving an organic binder in an organic solvent to prepare a solution; 3, adding the mixture to the solution, uniformly stirring to obtain a slurry, and carrying out spray drying of the slurry to obtain alloy powder; 4, compacting the alloy powder to form a pressed compact; and 5, placing the pressed compact in a sintering furnace, heating the sintering furnace under a vacuum condition, carrying out heat insulation when the temperature in the furnace increases to 1500-1850DEG C, letting hydrogen in the sintering furnace, continuously heating to 1950-2200DEG C, and cooling with the furnace to obtain the TZM alloy. The TZM alloy prepared through adopting the method disclosed in the invention has a guaranteed carbon content, has a controlled oxygen content of below 250ppm, and is obviously better than the TZM alloy prepared through a routine powder alloy method.

Description

technical field [0001] The invention belongs to the technical field of preparation of TZM alloy materials, and in particular relates to a method for preparing TZM alloy materials by spray drying. Background technique [0002] TZM is the best among molybdenum alloys, and it is a molybdenum alloy with a large amount and a wide range of uses. TZM molybdenum alloy has the advantages of high high temperature strength, heat erosion resistance, wear resistance, low temperature mechanical properties and welding performance, high temperature hardness and rigidity, good thermal conductivity and electrical conductivity, etc. It can be used for high temperature structural parts with a working temperature of about 1400 ° C It is widely used in chemical industry, petroleum industry, metallurgical industry and metal processing industry, aerospace industry and nuclear energy technology, such as die-casting mold material, rocket nozzle throat liner, valve body in special engine, nozzle in co...

Claims

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Application Information

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IPC IPC(8): C22C27/04C22C1/04
Inventor 付静波杨秦莉张晓庄飞
Owner JINDUICHENG MOLYBDENUM CO LTD
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