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Surface electrospark discharge method with graphite electrode to reinforce titanium alloy material

A graphite electrode and strengthening treatment technology, applied in the field of surface strengthening treatment, can solve the problems of low current utilization rate and production efficiency, unstable processing parameters, affecting the use effect, etc., to achieve convenient operation, dense surface strengthening points, and easy control. Effect

Inactive Publication Date: 2003-11-05
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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Problems solved by technology

[0002] At present, the surface strengthening treatment of titanium alloy parts mostly adopts RC discharge and relaxation EDM coating devices, which use cemented carbide materials as electrodes to perform dissolution coating and infiltration treatment on the surface of workpieces. Although this device has a simple structure , reliable work, low cost, but low current utilization rate and production efficiency, unstable processing parameters, easy to form arc discharge, often burn the surface of parts, affect the use effect, and even scrap parts in severe cases, which is not ideal

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  • Surface electrospark discharge method with graphite electrode to reinforce titanium alloy material
  • Surface electrospark discharge method with graphite electrode to reinforce titanium alloy material
  • Surface electrospark discharge method with graphite electrode to reinforce titanium alloy material

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Embodiment Construction

[0015] The method of the present invention adopts a kind of electric spark intensifier with small discharge energy, high discharge efficiency, controllable pulse discharge function, automatic control of the whole machine by programmable sequencer PLC, and the surface roughness is not greater than Ra3.2, The workpiece with a smooth, dry, and dirt-free surface is connected to the negative electrode of the pulse current, and the graphite electrode is connected to the positive electrode of the pulse current to form a discharge circuit for electric spark discharge, so that graphite and Ti undergo a chemical reaction, resulting in TiC strengthening phase, graphite electrode in the method: the degree of graphitization is greater than 50%, the hardness is less than HS30, the resistivity is 10-25μΩm, ​​and does not contain other metal impurities. The size and shape of the electrode can ensure convenient and reliable coating; the electromechanical parameters are: processing voltage 50-15...

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Abstract

The present invention is surface electrospark discharge method with graphite electrode to reinforce titanium alloy material, and the graphite electrode is superior to available hard alloy material electrode, which is likely to damage the surface of processed part surface. Graphite material electrode is used in electrospark variable-frequency discharge and electrode vibration treatment to re-combine C ion and Ti ion. The graphite electrode has graphite content higher than 50 %, hardness less HS30, resistivity 10-25 microohm. m, no metal impurity content and proper sizes. The electromechanical processing parameters includes voltage 50-150 V, current 1-5 A, time 50-200 s / sq cm, discharge frequency greater than 2000 Hz and electrode vibration frequency 50-100 Hz.

Description

Technical field [0001] The invention relates to a method for metal surface strengthening treatment, in particular to a method for performing surface strengthening treatment on titanium alloy parts. Background technique [0002] At present, the surface strengthening treatment of titanium alloy parts mostly adopts RC punching discharge and relaxation EDM coating devices, which use cemented carbide materials as electrodes to perform dissolution coating and infiltration treatment on the surface of workpieces. Although this device has a simple structure , reliable work, low cost, but low current utilization rate and production efficiency, unstable processing parameters, easy to form arc discharge, often burn the surface of parts, affect the use effect, and even scrap parts in severe cases, which is not ideal . Contents of the invention [0003] The purpose of the present invention is to provide a part made of titanium alloy material. Because the substrate is soft and the surfa...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/18C22F3/00
Inventor 陈文华牛立刚王德新
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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