Preparation of low cost refractory metal material flow-off

A technology of refractory metal and material flow, which is applied in the field of preparation of low-cost refractory metal material sprue, can solve the problems of high cost, low yield of sprue products, and restrictions on the expansion of sprue, so as to improve the yield, The effect of simple process and saving refractory metal resources

Inactive Publication Date: 2008-08-27
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When turning the pressed orifice prototype, more than 30% of the turning powder will be produced. These powders have been oxidized, polluted, and the particle size has changed after pressing, so they cannot be directly reused and become waste powder, resulting in the loss of orifice products. The yield is low and the cost is high, which restricts the expansion and application of the orifice

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Low-cost preparation method of molybdenum orifice: the molybdenum metal powder recovered by turning is ball-milled into -80 mesh powder, and then put into a boat, and the boat is placed in a hydrogen furnace. 3 The air flow rate per hour is fed into hydrogen, heated to 700°C, kept for 15 minutes, cooled to room temperature with the furnace, added to the new molybdenum powder according to the weight percentage of 30% of the mixed powder weight and mixed evenly, and then powdered by pressing, sintering, etc. The molybdenum metal material orifice is made by metallurgical method. The service life can reach more than 20 days.

Embodiment 2

[0016] Low-cost preparation method of tungsten orifice: Grind tungsten metal powder recovered from turning into -120 mesh powder, then put it into a boat, place the boat in a hydrogen furnace, press 0.4m 3 The air flow rate per hour is fed into hydrogen, heated to 750°C, kept for 20 minutes, cooled to room temperature with the furnace, added to the new tungsten powder according to the weight percentage of 40% of the mixed powder weight and mixed evenly, and then powdered by pressing, sintering, etc. Metallurgical method made of tungsten metal material orifice. The service life can reach more than 20 days.

Embodiment 3

[0018] Low-cost preparation method of tungsten-iridium sprue: Grind the tungsten metal powder recovered from turning into -100 mesh powder, then put it into a boat, place the boat in a hydrogen furnace, press 0.4m 3 The air flow rate per hour is fed into hydrogen, heated to 750 ° C, kept for 20 minutes, cooled to room temperature with the furnace, added to the new tungsten powder according to the weight percentage of 30% of the mixed powder weight and mixed evenly, and then passed through pressing, composite iridium tube , sintering and other powder metallurgy method made of tungsten iridium metal material orifice. The service life can reach more than 20 days.

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PUM

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Abstract

The invention discloses a manufacture method for a refractory metal flow port with low cost, which comprises the following steps of: ball-grinding refractory metal powder recovered from turning process to-60 to-200 meshes; purifying the powder; adding into eligible powder of the same trademark according to a certain weight percentage and mixing completely; and subjecting the powder mixture to powder metallurgic method such as pressing and sintering to obtain the refractory metal flow port. The refractory metal flow port meets the requirement for use performance and can improve the yield, reduce the production cost, save limited refractory metal resources and protect the natural environment. The process is simple and can save energy resources and reduce consumption.

Description

technical field [0001] The invention relates to a method for preparing a low-cost refractory metal material spout. Background technique [0002] With the rapid development of my country's metallurgy, machinery, petroleum, chemical industry, glass, ceramics, aerospace and other industries, the demand for refractory products has grown rapidly, and as a key component for refractory fiber production - the amount of nozzles is increasing. [0003] Orifice is one of the key components in aluminum silicate fiber production equipment. Its working environment is very harsh: long-term in SiO 2 and Al 2 o 3 In the superheated melt, the temperature reaches 2100°C (so the material for making the orifice is generally a refractory metal material, such as tungsten, molybdenum, etc.), and the continuous outflow of the melt through the orifice causes thermal erosion of the orifice wall, so its service life Generally only about 20 days, is a one-time consumables. [0004] Usually the spou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/22B22F8/00
CPCY02W30/50
Inventor 倪沛彤杨建朝董亚军韩明臣张英明李军段海青郑翠萍王成长
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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