Foam ceramic filter for cast steel and high temperature alloy and manufacturing method thereof

A foamed ceramic and superalloy technology, applied in ceramic products, applications, household appliances, etc., can solve the problems of high price, limited wide application, expensive monoclinic zirconia, etc., and achieve the effect of increasing strength and good high temperature strength.

Active Publication Date: 2016-08-10
JINAN SHENGQUAN DOUBLE SURPLUS CERAMIC FILTER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because zirconia has the characteristics of corrosion resistance and high melting point, and the prepared filter has high mechanical strength. Even with a porous foam structure, it can maintain good mechanical properties. However, zirconia is a synthetic conversion material. , although the filtering effect is good, its high price seriously limits its wide application in the field of cast steel and other high-temperature molten metal filtration, only for the casting of special steel or high value-added steel or alloy
[0004] Chinese patent application 200710115193.5 discloses a zirconia ceramic filter, which is mainly made of monoclinic zirconia with a small amount of stabilizer and binder. Compared with the filter made of pre-stabilized zirconia, The cost has been reduced, however, since monoclinic zirconia itself is also expensive, the products made from it are still difficult to use on a large scale
Since fused zirconia corundum is used as the main raw material in the production process, and high melting point inorganic glue is used as the binder, it has better high temperature resistance and thermal shock resistance, but it can only be used for cast aluminum or cast iron, and cannot be used For the filtration of molten metal in steel castings

Method used

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  • Foam ceramic filter for cast steel and high temperature alloy and manufacturing method thereof
  • Foam ceramic filter for cast steel and high temperature alloy and manufacturing method thereof
  • Foam ceramic filter for cast steel and high temperature alloy and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The raw materials are 250g fused zirconia, 400g alumina, 350g zircon powder, 35g TiO 2 , 20g Al 2 o 3 , 15g of aluminum silicate fiber, 50g of polyvinyl alcohol and 200g of water are put into a ball mill tank according to the above ratio and ball milled for 2 hours, and mixed evenly;

[0023] Coat the prepared slurry on polyurethane foam with a size of 75*75*25mm to obtain a ceramic foam filter body, dry it at 120°C for 1 hour, and then sinter it at 1590°C for 2 hours to make the product. Product performance is shown in Table 1.

[0024] Table 1 Example 1 product performance test results

[0025]

Embodiment 2

[0027] The raw materials are 250g fused zirconia, 400g alumina, 350g zircon powder, 35g TiO 2 , 20g Al 2 o 3 , 50g polyvinyl alcohol and 200g water are put into the ball mill tank according to the above ratio and are mixed evenly for 2 hours.

[0028] Coat the prepared slurry on polyurethane foam with a size of 75*75*25mm to obtain a ceramic foam filter body, dry it at 120°C for 1 hour, and then sinter it at 1590°C for 2 hours to make the product. Product performance is shown in Table 2.

[0029] Table 2 Example 2 product performance test results

[0030]

[0031]

Embodiment 3

[0033] Put 400g of fused zirconia, 250g of alumina, 250g of zircon powder, 30g of talc, 20g of silicon micropowder, 47g of clay, 30g of alumina fiber, 50g of hydroxymethyl cellulose, and 200g of water into the ball mill jar according to the above ratio. Ball mill for 1 hour and mix well;

[0034] Coat the prepared slurry on polyurethane foam with a specification of 50*50*22 to obtain a ceramic foam filter body, dry it at 80°C for 1.5 hours, and then sinter at 1625°C for 1.5 hours to make the product. Product performance is shown in Table 3.

[0035] The product performance of table 3 embodiment 3

[0036]

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Abstract

The invention discloses a low-cost foam ceramic filter for cast steel and high temperature alloy. The foam ceramic filter adopts zirconia, alumina and zirconium silicate powder as the main raw materials, is added with a small amount of a sintering aid and a binder, and foam cutting, slurry hanging, drying and sintering are carried out so as to generate the zirconia-corundum-mullite composite foam ceramic filter. The raw materials involved in the invention are low in cost, the product sintering temperature range is wide, the sintering process is easy to control, and the sintered zirconia-corundum-mullite composite foam ceramic filter has the characteristics of good thermal shock resistance, high mechanical strength, strong resistance to slag corrosion, and high load softening point, can tolerate impact of high temperature molten steel above 1650DEG C, and can be used for filtering cast steel and high temperature alloy liquid.

Description

technical field [0001] The invention belongs to a ceramic foam filter used in the foundry industry, in particular to a filter for high-performance cast steel prepared with low-cost materials and a production process. Background technique [0002] The development of ceramic foam filters began in the 1960s. It is a porous ceramic product with a porosity as high as 70-90%, a three-dimensional network skeleton and interpenetrating pore structure. As a new type of inorganic non-metallic filter material, in addition to the properties of general ceramics such as high temperature resistance and corrosion resistance, foam ceramics also have light weight, high porosity, large specific surface area, high strength, high temperature resistance, and Corrosion, good thermal shock resistance, etc., are widely used in filtering molten metals, can greatly reduce casting sand holes, slag holes, pores, inclusions and other defects, improve surface quality, improve machinability, and improve mec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B35/66C04B35/185C04B35/48C04B35/80
Inventor 祝建勋杨淑金刘敬浩李妍李顺赵国庆
Owner JINAN SHENGQUAN DOUBLE SURPLUS CERAMIC FILTER
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