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Mosaic ceramic drawing die and making method thereof

A wire drawing die and inlaid splicing technology, applied in the field of inlaid spliced ​​ceramic wire drawing dies and its preparation, can solve the problems of difficult grinding in the exit area, low impact resistance and toughness, thermal fatigue cracks, etc., and reduce the production process. And the effect of cost, hardness and wear resistance improvement, good mechanical properties

Active Publication Date: 2014-02-19
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the large amount of ceramic powder required to make the entire wire drawing die, it is especially difficult to grind the exit area after forming
Usually a single ceramic wire drawing die is prone to defects such as thermal fatigue cracks due to natural defects such as low impact resistance and toughness of ceramic materials.

Method used

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  • Mosaic ceramic drawing die and making method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] The core 2 material is a kind of Al 2 O 3 as the matrix, adding ZrO 2 and Y 2 O 3 The formed ternary eutectic nano-ceramics. First set the molar ratio to 65mol% Al 2 O 3 , 19mol% ZrO 2 , 16mol Y 2 O 3 The three commercially available nanopowders were uniformly mixed in a ball mill. The mixed nano-ceramic powder is put into a cylindrical mold made of graphite, and is slowly pressurized to 200 MPa on an ordinary press, maintained for 5 minutes, and slowly unloaded to take out the pressed cylindrical ceramic body. Then, the ceramic body was put into a common heating furnace and slowly heated to 1450° C., kept for 2 hours, and taken out to obtain a ceramic sintered body. The ceramic sintered body is put into a graphite mold for vacuum melting at a melting temperature of 1900°C, then cooled to room temperature with the furnace, and the ceramic material is taken out to obtain a eutectic ceramic body 4 with extremely high wear resistance.

[0032] The eutectic ceram...

Embodiment 2

[0034] The core 2 material is a kind of Al 2 O 3 as the matrix, adding ZrO 2 and Y 2 O 3 The obtained ternary eutectic nano-ceramic. First, according to the molar ratio of reaction products, it is 64mol% Al 2 O 3 , 18mol% ZrO 2 , 18molY 2 O 3 Calculate Weighing Al 2 (NO 3 ) 9H 2 O: 65%, ZrOCl 2 ·8H 2 O: 20%, Y (NO 3 ) 3 ·6H 2 O: 15% three kinds of raw materials, after mixing the three kinds of raw materials, add them into a mixed solvent of absolute ethanol and distilled water, first add a small amount of polyethylene glycol as a dispersing agent in the solvent to prevent the three kinds of nano powders from being added Agglomeration of the body occurs, and the solution should be continuously stirred during the addition of the drug. After stirring for 50 minutes, the solution was heated in a 65° C. water bath for 5 hours, then a small amount of ammonia water was added to the solution, and the solution was allowed to stand for 1 day. Since the powder will be p...

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Abstract

The invention discloses a mosaic ceramic drawing die and a making method thereof. The mosaic ceramic drawing die is characterized in that the mosaic ceramic drawing die comprises a die core and a die sleeve; the die core comprises an inlet zone, a work zone and a sizing zone which are coaxial, are smoothly connected, and are obtained through a superplastic extrusion molding method, and the material of the die core is an alumina-based ternary eutectic ceramic; and the die sleeve comprises a die core accommodating zone for fixing the die core, and an outlet zone smoothly connected with the sizing zone. The drawing die core is formed through the superplastic extrusion molding by utilizing the superplasticity of the alumina-based ternary eutectic ceramic, and is inlaid in the die sleeve to compose the mosaic ceramic drawing die. The die core has a high hardness and wear and high temperature resistances, and can substantially improve the service life of the drawing die; and the superplastic molding method is suitable for the batch production, and the whole drawing die adopts a mosaic structure, so the production cost of the whole drawing die is reduced.

Description

technical field [0001] The invention belongs to the manufacturing field of wire drawing dies, in particular to an inlaid ceramic wire drawing die and a preparation method thereof. Background technique [0002] As an important part in the metal material drawing industry, the wire drawing die is a typical consumable tool. The materials used to make the wire drawing die are: alloy steel, cemented carbide, natural diamond, artificial polycrystalline diamond, ceramics and other materials. And most wire drawing dies are made by the process of the core and the die sleeve, that is, the material with good mechanical properties is used as the core, that is, the working part of the core, and the material for making the core is mostly cemented carbide or synthetic diamond. ; Use carbon steel, stainless steel and other materials to make mold sleeves. [0003] Cemented carbide wire drawing dies are generally made of carbides as raw materials, adding a certain amount of transition group ...

Claims

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Application Information

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IPC IPC(8): B21C3/04B21C3/18C04B35/66C04B35/10
Inventor 陈国清付雪松骆科广宋士平王春光
Owner DALIAN UNIV OF TECH
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