Special line cutting electrode molybdenum wire and its manufacturing method

A technology of wire cutting and molybdenum wire, which is applied in the direction of electrode manufacturing, manufacturing tools, electric processing equipment, etc., can solve the problems of broken wire, waste, and short service life, and achieve improved tensile strength, extended service life, and wear resistance Improved effect

Inactive Publication Date: 2006-10-25
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

Due to the low tensile strength of pure molybdenum wire, the electrode wire moves at a fast speed (300-700mm/min) during the operation of the wire electric discharge machine, and it runs in

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1: Press La 2 o 3 Content (weight percent) 0.2% doping.

[0013] 54g lanthanum nitrate (La 2 o 3 Content 37%) was dissolved in pure water, added to 13.333kg of molybdenum dioxide powder, heated to decompose, mixed evenly, and then reduced with hydrogen in a furnace at 800-1000°C to obtain the doped rare earth oxide La 2 o 3 10kg of molybdenum powder with a content of 0.2%. Put the doped molybdenum powder into the rubber sleeve and press it into a round molybdenum rod with an isostatic press under a pressure of 160-200Mpa, and then sinter at a high temperature of 1800°C in an intermediate frequency sintering furnace to obtain a La-containing 2 o 3 0.2% molybdenum rod. After multi-pass swaging and stretching, it is processed into a special wire-cut molybdenum wire with a diameter of 0.18mm. The tensile strength measured by an electronic tensile testing machine (100N) is 0.95N / mg.

Embodiment 2

[0014] Embodiment 2, according to La 2 o 3 Content (weight percent) 0.4% doping.

[0015] 108g lanthanum nitrate (La 2 o 3 Content 37%) was dissolved in pure water, added to 13.333kg of molybdenum dioxide powder, heated to decompose, mixed evenly, and then reduced with hydrogen in a furnace at 800-1000°C to obtain the doped rare earth oxide La 2 o 3 10kg of molybdenum powder with a content of 0.4%. Put the doped molybdenum powder into the rubber sleeve and press it into a round molybdenum rod with an isostatic press under a pressure of 160-200Mpa, and then sinter at a high temperature of 1800°C in an intermediate frequency sintering furnace to obtain a La-containing 2 o 3 0.4% molybdenum rod. After multi-pass swaging and stretching, it is processed into a special wire-cut molybdenum wire with a diameter of 0.18mm. The tensile strength measured by an electronic tensile testing machine (100N) is 1.00N / mg.

Embodiment 3

[0016] Example 3: Press La 2 o 3 Content (weight percent) 0.6% doping.

[0017] 162g lanthanum nitrate (La 2 o 3 Content 37%) was dissolved in pure water, added to 13.333kg of molybdenum dioxide powder, heated to decompose, mixed evenly, and then reduced with hydrogen in a furnace at 800-1000°C to obtain the doped rare earth oxide La 2 o 3 10kg of molybdenum powder with a content of 0.6%. Put the doped molybdenum powder into the rubber sleeve and press it into a round molybdenum rod with an isostatic press under a pressure of 160-200Mpa, and then sinter at a high temperature of 1900°C in an intermediate frequency sintering furnace to obtain a La-containing 2 o 3 0.6% molybdenum rod. After multi-pass swaging and stretching, it is processed into a special wire-cut molybdenum wire with a diameter of 0.18mm. The tensile strength measured by an electronic tensile testing machine (100N) is 1.03N / mg.

[0018] La 2 o 3 When the content exceeds 0.6%, the pressure processing ...

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PUM

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Abstract

The present invention relates to a special wire-cutting electrode molybdenum wire. Its weight composition includes molybdenum powder and doped rare-earth oxide La2O3, the weight content of La2O3 is 0.2-0.6%. Its preparation method includes the following steps: adding lanthanum nitrate aqueous solution into molybdenum dioxide powder, heating to make decomposition at 80-100 deg.C, uniformly mixing, then make hydrogenation reduction in furnace at 800-1000 deg.C to obtain the molybdenum powder in which rare earth oxide La2O3 is doped, finally making the molybdenum powder into molybdenum wire.

Description

technical field [0001] The invention belongs to a rare-earth molybdenum alloy material for electric discharge wire cutting electrode wire and a manufacturing method thereof. Background technique [0002] The wire electric discharge machine can automatically cut and process various shapes of dies and parts, and has the advantages of high precision, fast speed and short cycle. The traditional wire cutting electrode wire uses pure molybdenum wire, using pure molybdenum rods as raw materials, through metal calendering processes such as swaging and stretching, to produce wires of various diameters. Due to the low tensile strength of pure molybdenum wire, the electrode wire moves at a fast speed (300-700mm / min) during the operation of the wire electric discharge machine, and it runs in a two-way back and forth cycle, so it is very easy to break the wire during the processing , the service life is short, resulting in low utilization rate of molybdenum wire and serious waste. Con...

Claims

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Application Information

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IPC IPC(8): B23H7/24B23H7/02B23H7/22
Inventor 马立东李世伟王庆国孟庆乐黄立峰
Owner 金堆城钼业光明(山东)股份有限公司
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