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Alloy wire and preparation method and application thereof

A technology of alloy wire and tungsten alloy, which is applied in the field of alloy wire and its preparation, can solve problems such as poor toughness, difficulty in mass production, and complicated production process

Active Publication Date: 2021-07-30
XIAMEN HONGLU TUNGSTEN MOLYBDENUM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The tensile strength of conventional tungsten wire is generally below 4000MPa. However, its toughness is poor, the production process is complicated, and the processing is extremely difficult, making it difficult to achieve effective mass production.
Therefore, there is no wire rod with high strength and high toughness that is suitable for mass production and has more than 4500 MPa on the market. In the cutting of high hardness materials such as semiconductor materials sapphire, silicon carbide, silicon wafers, and magnetic materials, high In applications such as cables or ropes pulled by precision instruments and high-temperature furnaces, there is an urgent need for a filament with higher strength, toughness and fineness, so that it can meet various real needs in practical applications in this field

Method used

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  • Alloy wire and preparation method and application thereof
  • Alloy wire and preparation method and application thereof
  • Alloy wire and preparation method and application thereof

Examples

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Effect test

preparation example Construction

[0058] The invention provides a method for preparing an alloy wire rod:

[0059] The steps of the preparation method include doping powder making, pressing, sintering, blanking, pressure processing, etc.;

[0060] doping, reducing, powder mixing,

[0061] Wherein, the doped pulverization is divided according to different process methods, including solid-liquid, liquid-liquid and solid-solid methods;

[0062] Specifically, based on the solid-liquid method, the doping pulverization includes the following steps:

[0063] Solid-liquid doping, reduction, pulverization;

[0064] The method of solid-liquid doping includes: doping an appropriate amount of soluble lanthanum salt solution into tungsten powder, and after fully stirring, heating and drying in stages to obtain the product;

[0065] The staged heating and drying adopts a low-temperature drying method first and then a high-temperature drying method, that is, drying is carried out at a temperature lower than 100°C, so that...

Embodiment approach

[0077] In addition, steps such as reduction and milling in the above steps are preferably but not limited to the following implementations, namely:

[0078] Reduction: the material obtained by doping solid-liquid and / or liquid-liquid is reduced into alloy powder once in a four-temperature zone reduction furnace;

[0079] Powder making: Mix the alloy powder obtained after reduction, and put the alloy powder with an average Fischer grain size of 1.0-4.0 μm into the powder mixer after mixing. Mix the powder at a speed of 6-10 rpm for 60-90 minutes;

[0080] Powder compaction: Using isostatic pressing, the powder with an average Fibonacci particle size of 1.0 μm to 4.0 μm is pressed into a green compact with a unit weight of 1.5 kg to 5.0 kg through a pressure of 160 MPa to 260 MPa, and the green compact is pressed in a hydrogen atmosphere. Carry out pre-sintering, the temperature of the pre-sintering is preferably 1200-1400°C, to increase the compact strength;

[0081] Sinterin...

Embodiment 11

[0094] This group of embodiment is to prepare a kind of high-strength and high-toughness tungsten alloy wire rod according to the present invention, and its material element composition is: La 2 o 3 is 1wt%, and W is 99wt%.

[0095] Its preparation steps are as follows:

[0096] Step 1. Doping: uniformly dope an appropriate amount of lanthanum nitrate solution into the blue tungsten powder, and after fully stirring, dry at a low temperature of 80°C for 4 hours and then dry at a high temperature of 120°C;

[0097] Step 2. Reduction: the material obtained in step 1 is reduced into an alloy powder with a suitable particle size at one time in a reduction furnace with four temperature zones;

[0098] Step 3, powder mixing: put the materials obtained in step 2 into a powder mixing machine according to different particle sizes. Mix the powder for 80 minutes at a speed of 8 rpm;

[0099]Step 4. Powder compaction: The powders with different particle sizes are pressed by isostatic p...

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Abstract

The invention relates to the technical field of tungsten alloy materials, in particular to an alloy wire and a preparation method and application thereof.The alloy wire is made of tungsten alloy, the tungsten alloy comprises tungsten and lanthanum oxides, and the wire diameter of the alloy wire is 100 [mu] m or below. The tensile strength of the alloy wire is 3800 MPa or above. The wire diameter of the alloy wire is 60 [mu] m or below. The diameter of a push-pull core wire of the alloy wire is less than 350 [mu] m. The ultimate elastic strength of the alloy wire is 2500 MPa or above. The tensile strength of the alloy wire is 4200 MPa or above. According to the alloy wire, the alloy wire with ultrahigh strength and good toughness is obtained by doping the lanthanum oxide.

Description

technical field [0001] The invention relates to the technical field of tungsten alloy materials, in particular to an alloy wire and its preparation method and application. Background technique [0002] Now known to have a certain high strength, hardness materials include high carbon steel wire, tungsten wire and so on. However, the tensile strength of existing high-carbon steel wires is generally below 4500 MPa, but the diameter is larger than 50 μm, and has reached the processing limit, and cannot be processed to a finer diameter. [0003] In addition, tungsten has unmatched flexibility at bend radii of less than 1 mm, while stainless steel wire ropes at the same extremely small bend radii may fail due to multiple cycles of bending stress; in comparison, 316 stainless steel at 2,500– It melts at 2,550°F, while tungsten melts at 6,192°F. It can be seen that tungsten still performs well in mechanical wire rope applications that require good temperature resistance and excelle...

Claims

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Application Information

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IPC IPC(8): C22C27/04C22C32/00C22C1/05B28D5/04D07B1/00D02G3/12
CPCC22C27/04C22C32/0031C22C1/05B28D5/045B22F5/12B23D61/185B22F2007/066B22F2998/10B22F1/145B22F1/16C22F1/18C22C1/0458C22C1/057B22F9/24B22F3/12B22F3/17C22C1/059C21D9/525D03D15/67B22F2301/20B22F2302/25D03D1/0035D10B2101/20D10B2501/041
Inventor 汤闵枫吕晟方毅金郭东红吴先月张伟兵姚彤锴张丁旺涂启建彭福生陈伟聪
Owner XIAMEN HONGLU TUNGSTEN MOLYBDENUM IND CO LTD
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