A kind of preparation method of ceramic wire drawing die

A wire drawing die and ceramic technology, applied in the direction of wire drawing die, etc., can solve the problems of high cost of ceramic wire drawing die, high polycrystalline production cost, die wear failure, etc., to avoid metal bonding phase, good dimensional stability, change wear and tear The effect of the mechanism

CN107010931BActive Publication Date: 2020-03-31QINGDAO UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-03-31

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Abstract

The invention belongs to the technical field of production of dies for novel materials and relates to a production method of a ceramic drawing die; the production method comprises the steps of preparing a suspension, forming a green body, sintering conventionally, and sintering by microwave; alumina and 3Y-TZP micropowder are subjected as materials to advanced isostatic one-step forming technique and microwave sintering technique to produce the ceramic drawing die; after sintering, polishing the surface of the ceramic drawing die is only required for use; wear-resistant crystal of the ceramic die is tightly combined in solid-phase combination manner, and the ceramic crystal has improved bonding strength and increased density; the ceramic is subjected to solid-phase sintering, integral hardness is improved, the ceramic crystal interfacial strength and toughness can resist drawing pressure stress and shearing damage, a wear mechanism of the drawing die is changed, the service life of the drawing die is 4-6 longer than that of a hard alloy die, the manufacture cost of the ceramic drawing die is lowered, and production steps are lessened at the premise of improving performance index, quality and production efficiency of ceramic material; the principle of the method is scientific and reasonable, and the yield is high.
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Description

Technical field:

[0001] The invention belongs to the technical field of mold preparation for new materials, and relates to a method for preparing a ceramic wire drawing mold. The two-phase composite ceramic material ZTA (zirconia toughened alumina ceramic) is used as a raw material, and gel injection molding + static pressure molding and conventional sintering are adopted. +Microwave sintering technology to prepare ceramic wire drawing molds. Background technique:

[0002] There are three main materials for metal wire drawing dies: hard metal (WC-Co), polycrystalline (PCD), and diamond (ND). Hard alloy and diamond are traditional mold materials. Since the 1940s, hard alloy dies It has always been dominant in wire drawing molds. The characteristics of cemented carbide molds are good strength and toughness, excellent wear resistance, convenient mold repair, and relatively low cost. Most of the molds with specifications are still made of this material. However, since cemented ...

Examples

Embodiment 1

[0025] The technical process of the ceramic wire drawing die preparation method involved in this embodiment includes four steps of suspension preparation, green body forming, conventional sintering and microwave sintering:

[0026] (1) Suspension preparation: Mix acrylamide monomer with N,N'methylenebisacrylamide at a mass ratio of 17:1 to prepare a mixture, and then mix the mixture with water at a mass ratio of 18:85 Prepare the pre-preparation solution by mixing, add 0.5% by mass of dispersant, powdery 3Y-TZP with a purity greater than 99% and a particle size of less than 0.5 μm, and powdered Al with a purity of 99% and a particle size of 1 μm in the pre-preparation solution 2 o 3 Prepare a suspension with a pH value of 9.5 and a solid phase volume fraction greater than 50%. Put the suspension in a ball mill and pulverize it for 12 hours to obtain a water system ceramic slurry suspension with a viscosity of less than 300mPa.S. The mixture is placed in a water system ceramic ...