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Solid-liquid two-phase mixed working medium suitable for electric discharge surface treatment

A surface treatment and working medium technology, which is applied in the field of solid-liquid two-phase mixed working medium for discharge surface treatment, can solve the problems of easy microcracks in the reinforced layer, uneven thickness and component distribution of the reinforced layer, and achieve good dispersion stability , good self-dispersion, and the effect of improving uniformity

Active Publication Date: 2017-01-04
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies and shortcomings of the prior art above, and provide a novel working medium suitable for discharge surface treatment, so as to improve the thickness of the strengthening layer and Problems such as uneven distribution of ingredients and easy microcracks in the reinforced layer

Method used

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  • Solid-liquid two-phase mixed working medium suitable for electric discharge surface treatment
  • Solid-liquid two-phase mixed working medium suitable for electric discharge surface treatment
  • Solid-liquid two-phase mixed working medium suitable for electric discharge surface treatment

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Embodiment 1

[0027] figure 1 It is a schematic diagram of the solid-liquid two-phase mixed working medium for discharge surface treatment of the present invention. Among them, 110 is an insulating liquid, 120 is a solid additive, and 130 is a solid-liquid two-phase mixed working medium for discharge surface treatment. The working medium 130 of the present invention includes an insulating liquid 110 and a solid additive 120 . The insulating liquid is kerosene, and the solid additive is one or more of graphene, two-dimensional boron nitride and two-dimensional titanium carbide.

[0028] The solid additive in this example is graphene, which is modified by alkyl functionalization before mixing graphene with kerosene. It is a two-step method of acylation activation and amide reaction to graft an alkane with a carbon chain length of C12 to C18 on the surface of graphene. base functional group.

[0029] The steps of graphene alkyl functional modification are as follows: take 1 g of graphene co...

Embodiment 2

[0033] Unlike Example 1, in the step of graphene alkyl functional modification, the alkylamine liquid used is octadecylamine, thus obtaining octadecyl functionalized graphene. Octalkyl functionalized graphene is mixed with 1L kerosene, and ultrasonically dispersed for 30 minutes to obtain a concentration of 0.01gL -1 Octadecyl functionalized graphene / kerosene solid-liquid two-phase mixed working medium.

[0034] figure 2 It is a schematic diagram of the molecular structure of alkyl functionalized graphene in embodiment 1 and embodiment 2. Wherein, embodiment 1 is dodecyl functionalized graphene, and embodiment 2 is octadecyl functionalized graphene. Depend on figure 2 It can be seen that the -COOH functional group on the surface of graphene is replaced by -CO-NH(CH 2 )n-CH 3 (n=11 or n=17) functional groups are substituted, thereby realizing the dodecyl functional modification or octadecyl functional modification of graphene.

Embodiment 3

[0036] The difference from Example 1 is that the solid additive is two-dimensional boron nitride. Two-dimensional boron nitride is modified by alkyl functionalization before mixing with kerosene. In this example, an alkyl functional group with a carbon chain length of C12-C18 is grafted on the surface of two-dimensional boron nitride through acid chloride reaction.

[0037] The steps of two-dimensional boron nitride alkyl functional modification are as follows: take 1g surface containing -NH 2 Two-dimensional boron nitride powder with functional groups, ultrasonically dispersed in 1L dimethylformamide and dodecanoyl chloride mixture (volume ratio 3:7), under nitrogen protection atmosphere, reflux at 120°C for 48 hours, filter and vacuum at 100°C After drying, dodecyl functionalized two-dimensional boron nitride is obtained.

[0038] Take 0.5g of the above-mentioned dodecyl functionalized two-dimensional boron nitride and mix it with 1L of kerosene, and disperse it ultrasonica...

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Abstract

The invention discloses a solid-liquid two-phase mixed working medium suitable for electric discharge surface treatment. The solid-liquid two-phase mixed working medium comprises kerosene and a solid additive. The solid additive is one or more of graphene, two-dimensional boron nitride or a two-dimensional titanium carbide nanosheet subjected to alkyl functional treatment. The solid additive has good self-dispersion and dispersion stability in kerosene. The working medium disclosed by the invention has the advantages such as low breakdown strength, electric good discharge uniformity, less inter-electrode stray capacitance and refined electric discharge energy, can effectively improve uniformity of components and thickness of a strengthened layer, and can reduce defects such as holes and cracks of the strengthened layer, so that wear resistance and corrosion resistance of the strengthened layer are improved; and the solid-liquid two-phase mixed working medium is expected to be widely applied in the surface modifying field of tools, moulds and various mechanical parts.

Description

technical field [0001] The invention belongs to the field of special processing, and more specifically relates to a solid-liquid two-phase mixed working medium for discharge surface treatment. Background technique [0002] Discharge surface treatment technology is a new surface treatment technology developed on the basis of traditional EDM technology. Its working principle is to apply pulse discharge to the tool electrode and the workpiece immersed in the machining fluid, and use the energy generated by the pulse discharge to form a strengthening layer composed of the tool electrode material or the material obtained by the reaction of the tool electrode material with the help of discharge energy on the surface of the workpiece. , thereby improving the surface properties of the workpiece. Due to the advantages of low equipment requirements, simple process, less thermal deformation of the workpiece, and high bonding force between the strengthening layer and the workpiece, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23H1/08
CPCB23H1/08
Inventor 麦永津揭晓华张留艳
Owner GUANGDONG UNIV OF TECH
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