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A preparation method of molybdenum alloy wire doped with lanthanum oxide and neodymium oxide

A technology of neodymium oxide and lanthanum oxide, which is applied in the field of preparation of molybdenum alloy wire, can solve the problems of not being able to better adapt to the alignment of molybdenum wire, affecting the final molding quality of the product, and the diameter of the through hole cannot be adjusted, so as to improve the alignment effect , simple structure and low production cost

Active Publication Date: 2019-10-11
金堆城钼业光明(山东)股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The diameter of the through hole opened by the main shaft in traditional equipment is constant. After a period of use, wear will occur and the gap will increase. The rotation of the molybdenum wire will collide with the inner wall of the straight through hole, which will affect the final molding quality of the product.
In addition, since the diameter of the through hole is not adjustable, it cannot better adapt to the alignment of molybdenum wires of different specifications, and the use is not flexible enough and cheap

Method used

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  • A preparation method of molybdenum alloy wire doped with lanthanum oxide and neodymium oxide
  • A preparation method of molybdenum alloy wire doped with lanthanum oxide and neodymium oxide
  • A preparation method of molybdenum alloy wire doped with lanthanum oxide and neodymium oxide

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preparation example Construction

[0037] A method for preparing molybdenum alloy wire doped with lanthanum oxide and neodymium oxide according to the present invention, the raw materials required for preparing the molybdenum alloy wire include the following components in terms of mass fraction:

[0038] Lanthanum oxide 0.2-0.6%;

[0039] Neodymium oxide 0.1-0.4%;

[0040] The rest is high-purity molybdenum trioxide and unavoidable impurities.

[0041] The preparation method of the molybdenum alloy wire doped with lanthanum oxide and neodymium oxide comprises the following steps:

[0042](1) Prepare high-purity molybdenum trioxide, lanthanum oxide and neodymium oxide according to the mass fraction;

[0043] (2) High-purity molybdenum trioxide is put into a low-temperature reduction furnace, and a reduction is performed under a hydrogen atmosphere to obtain molybdenum dioxide powder;

[0044] (3) Mix molybdenum dioxide powder with lanthanum oxide and neodymium oxide in proportion and mix them evenly in a powd...

example 1

[0050] Example 1. Press La 2 o 3 0.2% by weight, Nd 2 o 3 0.1% doping by weight, will 200gLa 2 o 3 and 100g Nd 2 o 3 , added to 100kg of molybdenum dioxide powder, mixed well, and then reduced with hydrogen in a high-temperature reduction furnace to obtain molybdenum-lanthanum-neodymium alloy powder. Put the molybdenum alloy powder into the rubber sleeve, press it into a round molybdenum rod with an isostatic press under a pressure of 160-180Mpa, and then sinter at a high temperature of 1900°C in an intermediate frequency sintering furnace to obtain a molybdenum-lanthanum-neodymium alloy molybdenum rod. After multi-pass swaging and drawing, it is processed into a molybdenum-lanthanum-neodymium alloy wire with a diameter of 0.18mm. The tensile strength measured by the electronic tensile testing machine (100N) is 2350N / mm 2 .

example 2

[0051] Example 2. Press La 2 o 3 0.4% by weight, Nd 2 o 3 Doped with a weight ratio of 0.25%, the 400gLa 2 o 3 and 250g Nd 2 o 3 , added to 100kg of molybdenum dioxide powder, mixed well, and then reduced with hydrogen in a high-temperature reduction furnace to obtain molybdenum-lanthanum-neodymium alloy powder. Put the molybdenum alloy powder into the rubber sleeve, press it into a round molybdenum rod with an isostatic press under a pressure of 160-180Mpa, and then sinter at a high temperature of 1900°C in an intermediate frequency sintering furnace to obtain a molybdenum-lanthanum-neodymium alloy molybdenum rod. After multi-pass swaging and drawing, it is processed into a molybdenum-lanthanum-neodymium alloy wire with a diameter of 0.18mm. The tensile strength measured by the electronic tensile testing machine (100N) is 2450N / mm 2 .

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Abstract

The invention discloses a preparation method of a molybdenum alloy wire doped with lanthanum oxide and neodymium oxide and belongs to the technical field of material preparation. The preparation method is characterized in that raw materials required for preparing the molybdenum alloy wire comprise the following components of, by mass, 0.2-0.6% of the lanthanum oxide, 0.1-0.4% of the neodymium oxide and the balance high-purity molybdenum trioxide and unavoidable impurities. The lanthanum oxide and the neodymium oxide are simultaneously doped, the dispersion strengthening effect is enhanced, andthe strength and high-temperature resistance performance of the molybdenum alloy wire are further improved. According to the molybdenum-lanthanum-neodymium alloy wire prepared through the preparationmethod, compared with the strength of a molybdenum-lanthanum wire, the diameter of the molybdenum-lanthanum-neodymium alloy wire is 0.18 mm, the tensile strength of the molybdenum-lanthanum-neodymiumalloy wire can be improved by 10-20%, large current electrospark wire-electrode cutting is achieved, and the service life can be prolonged.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a method for preparing molybdenum alloy wire doped with lanthanum oxide and neodymium oxide. Background technique [0002] The addition of lanthanum oxide to pure molybdenum can play a role in dispersion strengthening, which can not only improve the strength and toughness of molybdenum materials, but also increase the recrystallization temperature of molybdenum and improve its high temperature resistance. Therefore, lanthanum-doped molybdenum alloys can replace pure molybdenum in the preparation Electric heating materials, wire cutting electrode materials, electric light sources and other industries. However, the lanthanum-doped molybdenum alloy has a single doping element, and the strength and recrystallization temperature of the molybdenum material are limited, so it is difficult to meet the higher demand. [0003] Neodymium oxide can improve the high-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/15B22F9/22C22C27/04C22C1/04B21C37/04
Inventor 李世伟孟庆乐黄立峰张鹏王卫张志国刘宝庆
Owner 金堆城钼业光明(山东)股份有限公司