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Durable crucible and molding method thereof

A molding method and durable technology, which is applied in the field of crucible molding, can solve the problems of high scrap rate, low number of reusable products, easy cracking and breaking, etc.

Active Publication Date: 2019-02-15
贵州大东风机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the existing crucibles are mainly made by knotting, sintering or pressing. Due to the current crucible formula and the finished products produced by the process are limited by the production technology and formula, the average life of the produced products is short. It is easy to break and break, and the use and production costs are high, and the scrap rate is high
In addition, most of the existing crucibles used for melting metals have a short lifespan, and the number of times they can be used repeatedly is small. Generally, they can only be used several times, and their durability is poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A durable crucible according to this embodiment, said durable crucible is composed of the following raw materials according to the percentage of the total weight of raw materials: 10% aluminum oxide, 8% yttrium oxide, 7% lanthanum oxide, and 35% fused silica , zirconia 10%, chromium oxide 30%.

[0023] In addition, the present invention provides a method for forming a durable crucible, comprising the following steps:

[0024] (1) According to the percentage of the total weight of raw materials, the following raw materials are weighed: 15% of aluminum oxide, 5% of yttrium oxide, 5% of lanthanum oxide, 30% of fused silica, 25% of zirconia, and 20% of chromium oxide;

[0025] (2) Then aluminum oxide, yttrium oxide, and lanthanum oxide are mixed evenly and then added to an electric melting furnace for electric melting, and the aluminum oxide, yttrium oxide, and lanthanum oxide are completely melted, and the temperature of the melt is continued to be refined until the refini...

Embodiment 2

[0036]This embodiment 2 is similar to embodiment 1, and it differs from embodiment 1 in that the durable crucible of the present embodiment is composed of the following raw materials according to the percentage of the total weight of raw materials: 15% aluminum oxide, 5% yttrium oxide %, 5% of lanthanum oxide, 30% of fused silica, 25% of zirconia, and 20% of chromium oxide; in this embodiment, the upper components are taken in proportion, and the molding method of the durable crucible of this embodiment is the same as in embodiment 1; casting The formed durable crucible is used to melt metals, can withstand high temperatures above 2550°C, and can be reused more than 100 times.

Embodiment 3

[0038] The present embodiment 3 is similar to the embodiment 1, the present embodiment 2 is similar to the embodiment 1, and it is different from the embodiment 1 in that the durable crucible of the present embodiment is calculated according to the percentage of the total weight of the raw materials, and consists of the following raw materials Composition: 20% of alumina, 2% of yttrium oxide, 3% of lanthanum oxide, 25% of fused silica, 40% of zirconia, and 10% of chromium oxide; The molding method of the crucible is the same as that in Example 1; the durable crucible formed by casting is used to melt metal, and can withstand a high temperature of over 2500° C., and can be reused more than 100 times.

[0039] After many experiments, it is found that the durable crucible obtained in the present embodiment 1-3 has good heat resistance, good toughness and good stability; specifically, the fused silica, zirconia, and chromium oxide of the present embodiment 1-3 can be used at high t...

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Abstract

The invention discloses a durable crucible and a molding method thereof, and relates to the technical field of crucible molding. The durable crucible is prepared from the following raw materials in percentage by total weight: 10 to 20 percent of alumina, 2 to 8 percent of cerium oxide, 3 to 7 percent of yttrium oxide, 25 to 35 percent of fused silica, 10 to 40 percent of zirconia and 10 to 30 percent of chromium oxide. The molding method comprises the following steps: weighing the above raw materials, then uniformly mixing the alumina, the cerium oxide and the cerium oxide, adding the mixtureto an electric melting furnace for electric melting, and then performing refining; then uniformly mixing the fused silica, the zirconia and the chrome oxide, and adding the mixture into the electric melting furnace, and continuing electric melting to form a melt; pouring an appropriate amount of the melt into a casting cavity of a mold, cooling the melt after the pouring is completed, and demolding the melt to form the crucible. The crucible cast by the molding method is uniform in texture, and has the advantages of high heat resistance, high toughness, high stability and durability.

Description

technical field [0001] The invention relates to the technical field of crucible molding, in particular to a durable crucible and a molding method thereof. Background technique [0002] At present, the existing crucibles are mainly made by knotting, sintering or pressing. Due to the current crucible formula and the finished products produced by the process are limited by the production technology and formula, the average life of the produced products is short. It is easy to break and break, and the use and production costs are high, and the scrap rate is high. In addition, most of the existing crucibles used for melting metals have a short service life and can be used repeatedly for a few times, generally only for several times, and have poor durability. Contents of the invention [0003] Therefore, in view of the above-mentioned problems, the purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, to provide a durable crucible wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/14C04B35/622C04B35/626C04B35/66
CPCC04B35/14C04B35/622C04B35/62605C04B35/66C04B2235/6022C04B2235/3244C04B2235/3241C04B2235/3225C04B2235/3227C04B2235/3217
Inventor 钟行佳黄昌辉王小多张宝贵
Owner 贵州大东风机械有限公司
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