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Nano zirconia and micron tungsten carbide toughened and enhanced metal ceramic die material and preparation method thereof

A mold material and metal ceramic technology, applied in the field of metal ceramic mold materials and their preparation, can solve problems such as low toughness, and achieve the effect of improving toughness and improving mechanical properties

Inactive Publication Date: 2011-01-26
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low toughness, currently cermet materials can only be used on molds with no or little impact load, such as hot extrusion, hot rolling molds, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Metal-ceramic mold material, the mass percentage of raw material components is: TiC 37.4%, TiN 16.6%, WC 14.4%, 5Y-ZrO 2 10%, Mo 7%, Ni 13%, C 0.8%, VC 0.8%. The preparation method is as follows:

[0046] Weigh TiC, TiN, and WC micron powders in proportion, add absolute ethanol to make suspensions of TiC, TiN, and WC, fully stir with a stirrer, and ultrasonically disperse for 30 minutes. TiC suspension, TiN suspension and WC suspension were obtained.

[0047] Weigh 5Y-ZrO in proportion 2 Nano-powder, polyethylene glycol (PEG4000) with a molecular weight of 4000 as a dispersant, with 5Y-ZrO 2 The mass of nano-powder is the base number, and the addition amount of the dispersant is 0.6wt%; with an appropriate amount of absolute ethanol as the dispersion medium, it is made into 5Y-ZrO 2 Suspension, fully stirred with a stirrer, ultrasonically dispersed for 30 minutes, and then adjusted to pH 3 of the suspension with hydrochloric acid and ammonia water to obtain yttrium-...

Embodiment 2

[0053] Metal-ceramic mold material, the mass percentage of raw material components is: TiC43.8%, TiN19.6%, WC10%, 5Y-ZrO 2 5%, Mo5%, Ni15%, C0.6%, VC1%. The preparation method is as follows:

[0054] Weigh TiC, TiN, WC micron powders in proportion, add absolute ethanol to prepare TiC, TiN, WC suspensions, fully stir with a stirrer, and ultrasonically disperse for 20 minutes. Weigh 5Y-ZrO in proportion 2 Nano-powder, polyethylene glycol (PEG4000) with a molecular weight of 4000 as a dispersant, with 5Y-ZrO 2 The mass of nano-powder is the base number, and the addition amount of the dispersant is 0.3wt%; with an appropriate amount of absolute ethanol as the dispersion medium, it is made into 5Y-ZrO 2 Suspension, fully stirred with a stirrer, ultrasonically dispersed for 20min, and then the pH value of the suspension was adjusted to 4 with hydrochloric acid and ammonia water. Weigh micron Mo, Ni, graphite, and VC powders in proportion, add absolute ethanol to prepare Mo, Ni, ...

Embodiment 3

[0057] Metal-ceramic mold material, the mass percentage of raw material components is: TiC 28.1%, TiN 12%, WC 18.4%, 5Y-ZrO 2 20%, Mo 10%, Ni 10%, C 1.1%, VC 0.4%. The preparation method is as follows:

[0058] Weigh TiC, TiN, and WC micron powders in proportion, add absolute ethanol to prepare TiC, TiN, and WC suspensions, fully stir with a stirrer, and ultrasonically disperse for 25 minutes. Weigh 5Y-ZrO in proportion 2 Nano-powder, polyethylene glycol (PEG4000) with a molecular weight of 4000 as a dispersant, with 5Y-ZrO 2 The mass of nano-powder is the base number, and the addition amount of the dispersant is 0.8wt%; with an appropriate amount of absolute ethanol as the dispersion medium, it is made into 5Y-ZrO 2 Suspension, fully stirred with a stirrer, ultrasonically dispersed for 25 minutes, and then the pH value of the suspension was adjusted to 3 with hydrochloric acid and ammonia water. Weigh micron Mo, Ni, graphite, and VC powders in proportion, add absolute eth...

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PUM

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Abstract

The invention relates to a metal ceramic die material and a preparation method thereof. The die material is formed by hot pressing and sintering micro TiC and TiN as matrix hard phases, added yttrium-stable nano ZrO2 and micro WC as enhanced phases, micro molybdenum and nickel as bonding phases and micro graphite and vanadium carbide as addictives. The preparation method comprises the following steps of: respectively dispersing the micro TiC, TiN, WC and micro ZrO2 powder; ball milling and drying to obtain the powder; and sintering by a hot pressing method. The method is beneficial to improving the strength and the toughness of the material and is simple in process and convenient in operation. The metal ceramic die material has favorable comprehensive mechanical properties and wear-resisting performance and can be used for fabricating squeezing dies, drawing dies, stamping dies and other wear-resisting parts.

Description

technical field [0001] The invention relates to a cermet mold material and a preparation method thereof, in particular to a cermet mold material toughened and reinforced by nanometer zirconia and micron tungsten carbide and a preparation method thereof. Background technique [0002] Cermet is a composite material composed of ceramic hard phase and metal binder phase. It has good mechanical properties and performance, and is an ideal structural material for making knives, molds, wear-resistant parts, etc. [0003] Chinese patent document CN86107658 provides a cermet mold material for thermal processing. The designed cermet material contains metal tungsten and ceramic phases such as aluminum oxide and lanthanum oxide, as well as chromium, nickel (or iron, cobalt), etc. metal element. As a copper hot extrusion die material, the average service life is 1650 pieces / mold, and the maximum service life reaches more than 3100 pieces / mold. [0004] Chinese patent document CN1031258...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C29/00
Inventor 许崇海王兴海张会发张永莲吴光永
Owner QILU UNIV OF TECH
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