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Ceramic material for nanometer aluminum oxide mold and preparation method of ceramic material

A nano-alumina, nano-zirconium carbide technology, applied in the field of cermet materials, can solve the problems of softening and wear resistance of mold materials, reducing mold life, poor product surface quality, etc. Functional characteristics, the effect of improving performance indicators

Inactive Publication Date: 2015-10-21
SUZHOU HENGHUI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Mold is an indispensable and important equipment in the manufacture of communication equipment, industrial devices, and auto parts. However, the working environment of the mold, such as huge extrusion impact, flow friction, etc., will cause the temperature of the mold to rise, so mold sticking often occurs , welding or oxidation, etc., which aggravate the wear of the mold and reduce the life of the mold
However, the higher temperature generated by the hot extrusion process usually softens the mold material and reduces wear resistance, reduces service life and poor surface quality of the product

Method used

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  • Ceramic material for nanometer aluminum oxide mold and preparation method of ceramic material
  • Ceramic material for nanometer aluminum oxide mold and preparation method of ceramic material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Step 1: Take powders of the following materials by weight percentage, nano-zirconium carbide 9wt%, nano-lanthanum hexaboride 3wt%, cobalt carbide 4.5wt%, boron nitride 2.5wt%, magnesium oxide 6wt%, manganese silicide 12wt% , 7wt% tungsten carbide, 2wt% molybdenum trioxide, 10wt% magnesium silicide, and the balance is alumina; add the above ingredients into the mixer and stir for 60 minutes;

[0040] Step 2: Mill the powder stirred in Step 1 in a ball mill for 4 hours, and the ball-to-material ratio in the ball mill is 20:1;

[0041] Step 3: The ceramic material after ball milling in Step 2 is heated and molded in a graphite mold, and then hot-pressed and sintered. The sintering temperature is 1400°C, the sintering pressure is 40MPa, and the sintering time is 3.5h. After sintering, a nano-alumina mold is prepared. Ceramic material.

Embodiment 2

[0043] Step 1: Take powders of the following materials by weight percentage respectively, nano-zirconium carbide 4wt%, nano-lanthanum hexaboride 10wt%, cobalt carbide 1.5wt%, boron nitride 5wt%, magnesium oxide 16wt%, manganese silicide 5wt%, 3wt% tungsten carbide, 8wt% molybdenum trioxide, 4wt% magnesium silicide, and the balance is alumina; add the above ingredients into the mixer and stir for 30 minutes;

[0044] Step 2: Mill the powder stirred in Step 1 in a ball mill for 1.5 hours, and the ball-to-material ratio in the ball mill is 30:1;

[0045] Step 3: The ceramic material after ball milling in Step 2 is heated and molded in a graphite mold, and then hot-pressed and sintered. The sintering temperature is 1250°C, the sintering pressure is 60MPa, and the sintering time is 1.5h. After sintering, a nano-alumina mold is prepared. Ceramic material.

Embodiment 3

[0047] Step 1: Take powders of the following materials by weight percentage, nano-zirconium carbide 7wt%, nano-lanthanum hexaboride 5wt%, cobalt carbide 3.5wt%, boron nitride 4.5wt%, magnesium oxide 9wt%, manganese silicide 10wt% , 4wt% tungsten carbide, 7wt% molybdenum trioxide, 6wt% magnesium silicide, and the balance is alumina; add the above ingredients into the mixer and stir for 60 minutes;

[0048] Step 2: Mill the powder stirred in Step 1 in a ball mill for 4 hours, and the ball-to-material ratio in the ball mill is 20:1;

[0049] Step 3: The ceramic material after ball milling in Step 2 is heated and molded in a graphite mold, and then hot-pressed and sintered. The sintering temperature is 1400°C, the sintering pressure is 40MPa, and the sintering time is 3.5h. After sintering, a nano-alumina mold is prepared. Ceramic material.

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Abstract

The invention discloses a ceramic material for a nanometer aluminum oxide mold and a preparation method of the ceramic material. The ceramic material comprises nanometer zirconium carbide, nanometer lanthanum hexaboride, cobalt carbide, boron nitride, magnesium oxide, manganese silicide, tungsten carbide, molybdenum trioxide, magnesium silicide and the balance of aluminum oxide. The preparation method comprises the following steps of step I: taking powder of the materials and adding the powder into a stirrer for stirring; step II: performing ball milling in a ball mill; step III: performing heating and compression molding on the ceramic material subjected to the ball milling in the step II in a graphite mold, and performing hot-pressure sintering at the sintering temperature of 1,250 to 1,400DEG C and the sintering pressure of 40 to 60MPa for 1.5 to 3.5 hours to obtain the ceramic material for the nanometer aluminum oxide mold. The prepared ceramic material has excellent fracture toughness, hardness and bending resistance, and can be applied to mold materials.

Description

technical field [0001] The invention belongs to the field of cermet materials, and relates to a cermet material and a preparation method thereof, in particular to a nano-alumina mold ceramic material and a preparation method thereof. Background technique [0002] Mold is an indispensable and important equipment in the manufacture of communication equipment, industrial devices, and auto parts. However, the working environment of the mold, such as huge extrusion impact, flow friction, etc., will cause the temperature of the mold to rise, so mold sticking often occurs , Welding or oxidation, etc., which aggravate the wear of the mold and reduce the life of the mold. However, the higher temperature generated by the hot extrusion process usually leads to softening of the mold material and a decrease in wear resistance, reduced service life and poor surface quality of the product. Therefore, an important way to improve the life of the mold is to select mold materials with high we...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/645
Inventor 郎世珍
Owner SUZHOU HENGHUI TECH