Rare earth, molybdenum and tungsten alloy used for cutting wires and preparing method thereof

A molybdenum-tungsten alloy and cutting wire technology, applied in the field of alloy research, can solve the problems of negative impact on electrical conductivity and mechanical properties, poor processing performance, high brittleness, etc., and achieve excellent electrical and thermal conductivity, low tensile strength, and resistivity small effect

Active Publication Date: 2019-08-09
廊坊开发区阳雨钨业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, although the tungsten-molybdenum alloy has improved the disadvantage of poor toughness of tungsten, it still has the disadvantages of high brittleness and poor processability; doping rare earth oxides in tungsten and molybdenum can improve its discharge performance, but at the same time it will It has a great impact on its mechanical properties; doping silicon, aluminum and potassium in tungsten can improve its high temperature resistance, but at the same time it will have a negative impact on its electrical conductivity and mechanical properties, so it is only used in the light source industry

Method used

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  • Rare earth, molybdenum and tungsten alloy used for cutting wires and preparing method thereof
  • Rare earth, molybdenum and tungsten alloy used for cutting wires and preparing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] The preparation of rare earth molybdenum tungsten alloy comprises the following steps:

[0038] 1) Powder mixing: according to the weight ratio of 74.4% molybdenum, 25% tungsten and 0.6% rare earth, put 37.2kg molybdenum powder, 12.5kg tungsten powder, 0.176kg lanthanum oxide, and 0.8kg cerium oxide into the "V" type mixing In the feeder, mix for 0.5h to obtain synthetic powder;

[0039] 2) Powder filling: Take 920 grams of synthetic powder and put it into the rubber sleeve on the vibration platform, vibrate for 0.5h, vibrate until it is uniform and dense, and then seal it with a plug;

[0040] 3) Forming: Place the sealed rubber sleeve on the rubber sleeve frame, then put the rubber sleeve frame into the barrel of the cold isostatic press, increase the pressure from 0MPa to 145-165MPa within 5-6min, The duration of the pressure holding process under 165MPa is 1-5min, and then the pressure relief is completed within 3-5min. After the cool pressing is completed, the mater...

Embodiment 2-4

[0049] In Examples 2-4, the preparation process of the alloys is exactly the same as in Example 1, except that the ratio of the components is changed, as shown in Table 1 below.

[0050] Composition and performance parameters of rare earth molybdenum-tungsten alloy in the embodiment 2-4 of table 1

[0051]

[0052] It can be seen from Table 1 that the rare earth molybdenum-tungsten alloy provided by the present invention is used as a cutting wire, and the resistivity is all less than 0.080Ω·mm 2 / m, the uniaxial tensile strength is greater than 2200MPa, the yield stress is greater than 2500MPa, the diameter The minimum arcing current of the alloy rods is not more than 4.5A, which shows that the rare earth molybdenum-tungsten alloy provided by the present invention has excellent electrical and thermal conductivity and tensile strength as a cutting wire, as well as a small arcing current, so that it can be obtained Larger cutting current and discharge spark greatly improve ...

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Abstract

The invention provides a rare earth, molybdenum and tungsten alloy. The rare earth, molybdenum and tungsten alloy comprises, by weight, 74.8% to 98.5% of molybdenum, 0.5% to 25% of tungsten and 0.2% to 3% of rare earth. When the alloy is used for cutting wires, the advantages of small electrical resistivity, large cutting current, high cutting speed and long service life are achieved, and the goodtensile strength and high temperature resistance are achieved. The preparation process of the alloy can ensure uniform distribution of alloy compositions and the stable contents of all components, improves the product yield and has scale and commercial production prospects.

Description

technical field [0001] The invention relates to the field of alloy research. More specifically, it relates to a rare earth molybdenum-tungsten alloy for cutting wire and a preparation method thereof. Background technique [0002] Tungsten and molybdenum are collectively referred to as refractory metals, both of which are rare and non-renewable resources. With the expansion of application fields, the world's reserves are decreasing year by year. Tungsten has a high melting point, high hardness, high tensile strength, but poor toughness and is difficult to process. The melting point of molybdenum is slightly lower than that of tungsten. It has good toughness but poor tensile strength and is not easy to process. Tungsten-molybdenum alloy has excellent resistance to the corrosion of liquid zinc, and is used to manufacture agitators, pipe and container linings and other components in the zinc smelting industry. Tungsten-molybdenum alloy has good high-temperature strength, simi...

Claims

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Application Information

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IPC IPC(8): C22C27/04C22C1/05C22F1/02C22F1/18
CPCC22C1/05C22C27/04C22F1/02C22F1/18
Inventor 姜雷王永革
Owner 廊坊开发区阳雨钨业股份有限公司
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