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Laminated self lubricating ceramic wire pulling mold and preparation method thereof

A wire drawing die, self-lubricating technology, applied in the direction of wire drawing die, etc., to overcome the weakening of strength, simple preparation process, and efficient drawing process.

Inactive Publication Date: 2019-01-18
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: The purpose of the present invention is to overcome the deficiencies of the prior art, solve the practical problem of high friction coefficient in the dry drawing production process of ceramic wire drawing dies, and provide a laminated self-lubricating ceramic wire drawing die and its preparation method

Method used

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Experimental program
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Effect test

Embodiment 1

[0010] A laminated self-lubricating ceramic wire drawing die, the matrix material of which is a silicon nitride-based ceramic material, the die is composed of basic layers and lubricating layers alternately superimposed along the drawing working direction, the thickness of a single layer of the basic layer is 1mm, and the single layer of the lubricating layer The thickness of the layer is also 1mm, the mold has a total of 35 layers along the axial direction, the length of the mold is 35mm, and the diameter of the outer cylinder is Φ30mm.

[0011] The preparation method of the laminated self-lubricating ceramic wire drawing die is as follows:

[0012] (1) The powder composition of the basic layer material is 75wt% Si 3 N 4 and 25wt% Si, the powder composition of the lubricating layer material is 75wt% Si 3 N 4 , 10wt% Si, 7wt% lubricating phase C (graphite), 8wt% lubricating phase MgF 2 , in the graphite mold, the basic layer material powder and the lubricating layer materi...

Embodiment 2

[0015] A laminated self-lubricating ceramic wire drawing die, the matrix material of which is a silicon nitride-based ceramic material, the die is composed of basic layers and lubricating layers alternately superimposed along the drawing working direction, the thickness of a single layer of the basic layer is 1mm, and the single layer of the lubricating layer The layer thickness is also 0.8mm. The mold has a total of 41 layers along the axial direction, including 21 basic layers and 20 lubricating layers. The length of the mold is 37mm, and the diameter of the outer cylinder is Φ35mm.

[0016] The preparation method of the laminated self-lubricating ceramic wire drawing die is as follows:

[0017] (1) The powder composition of the basic layer material is 80wt% Si 3 N 4 And 20wt% SiC, the lubricating layer material powder composition is the Si of 75wt%, the C (graphite) of 15wt%, the lubricating phase CaF of 10wt% 2 In the graphite mold, the basic layer material powder and th...

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Abstract

The invention belongs to the technical field of metal wire pulling mold manufacturing, and relates to a laminated self lubricating ceramic wire pulling mold and a preparation method thereof. A base body material of the laminated self lubricating ceramic wire pulling mold is shard-hardness structure ceramic; the mold is formed by alternately overlapping basic layers and lubricating layers in the pulling work direction; the basic layers ensure the structure intensity of the whole of the mold; the lubricating layer provides the lubrication function of the pulling production. The laminated self lubricating ceramic wire pulling mold is prepared through the processes of layered lamination material laying, hot pressing sintering, diamond ultrafine milling hole making and the like. The wire pulling mold can be widely applied to dry type pulling processing of high-toughness metal wire materials; the serious friction and abrasion work conditions of a pulling work interface can be effectively avoided, so that the surface quality of the wire material production can be obviously improved; the work life of the wire pulling mold can be obviously prolonged; simplicity, convenience, high efficiency, energy saving and environment protection are realized.

Description

technical field [0001] The invention relates to a laminated self-lubricating ceramic wire drawing die and a preparation method thereof, belonging to the technical field of wire drawing die manufacturing. Background technique [0002] The wire drawing die is an indispensable and consumable tool in the drawing process, which accounts for a large proportion of the wire production cost. In order to improve product competitiveness, the metal wire processing industry pays more and more attention to the improvement of the quality of wire drawing dies and the innovation of manufacturing methods. At present, with the main goal of improving the service life of the wire drawing die, researchers at home and abroad have conducted in-depth and systematic research on the design of the inner hole structure of the die, material selection, improvement of the manufacturing process, and anti-friction and anti-wear measures, and developed a wire drawing die. Pass design methods, new wire drawin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C3/02C04B35/584C04B35/645
CPCB21C3/02C04B35/584C04B35/645C04B2235/425C04B2235/428C04B2235/445C04B2235/658C04B2235/95
Inventor 吴泽邢佑强黄鹏刘磊
Owner SOUTHEAST UNIV
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