Preparation method of special foamed ceramic filter for magnesium alloy

A foamed ceramic and filter technology, which is applied in the fields of metal materials and metallurgy, can solve the problems of insufficient strength of ceramic filters, easy powder drop, polluted magnesium melt, etc., and achieves removal of macroscopic and microscopic inclusions, good high temperature resistance The effect of compression strength and simple process method
CN1410393AInactive Publication Date: 2003-04-16SHANGHAI HAOHUA MOLD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI HAOHUA MOLD
Publication Date
2003-04-16
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

A foam ceramic filter for molten Mg-alloy is prepared through preparing slurry from magnesium oxide as raw material and aluminium phosphate (or sulfate) as adhesive in a proportion of 1:(0.05-0.3), coating it on foam polyurethane plastics, drying and high-temp. sintering.
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Description

Technical field:

[0001] The invention relates to a method for preparing a special foam ceramic filter for magnesium alloys. The prepared filter is used for filtering and purifying magnesium alloy melts, and belongs to the field of metal materials and metallurgy. Background technique:

[0002] For a long time, inclusion defects have been a prominent problem in magnesium alloy casting production. The existence of inclusion defects significantly reduces the mechanical properties of castings, and surface inclusion defects can also reduce the integrity and smoothness of casting surfaces, especially the existence of surface flux inclusions. , will greatly reduce the corrosion resistance of the casting surface. Therefore, some important magnesium castings have extremely strict restrictions on inclusion defects.

[0003] Foamed ceramics is a new high-efficiency alloy melt filter medium that has emerged in recent years. As a filter material for alloy melts, foamed ceramics must have...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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