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Preparation method of high-strength casting coating for stainless steel casting

A casting coating, high-strength technology, used in casting molding equipment, coatings, molds, etc., can solve problems such as poor strength, and achieve the effect of improving the strength of the coating film, reducing stress concentration, and increasing the area

Pending Publication Date: 2021-04-16
成都途伊棠涂料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Technical problem to be solved by the present invention: Aiming at the problem of poor strength of existing stainless steel casting coatings under high temperature conditions, a preparation method of high-strength casting coatings for stainless steel castings is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033]In parts by weight, weigh 10 parts of zirconia whiskers with an average length of 20 μm, 10 parts of silicon carbide whiskers with an average length of 10 μm, 2 parts of ethyl orthosilicate, 10 parts of nitric acid solution with a mass fraction of 10%, 120 Add ethyl silicate and nitric acid to absolute ethanol, stir at 200~250r / min for 10 minutes at room temperature to obtain a modified solution, add zirconia whiskers and silicon carbide whiskers to the modified solution , stirred at 400r / min for 40min in a water bath at 50°C to obtain a mixed whisker suspension, put the mixed whisker suspension in an ultrasonic disperser, and ultrasonically treat it at 30°C with a power of 300W for 20min , to obtain a mixed whisker dispersion, put the mixed whisker dispersion in a centrifuge, centrifuge at a speed of 4000r / min at room temperature for 20min, take the lower layer of solid, wash it with deionized water until neutral, and place it in an oven at 80°C Drying in medium tempera...

Embodiment 2

[0037] In parts by weight, weigh 15 parts of zirconia whiskers with an average length of 25 μm, 15 parts of silicon carbide whiskers with an average length of 15 μm, 3 parts of tetraethyl orthosilicate, 15 parts of nitric acid solution with a mass fraction of 10%, 180 Add ethyl silicate and nitric acid to absolute ethanol, stir at 225r / min for 15min at room temperature to obtain a modified solution, add zirconia whiskers and silicon carbide whiskers to the modified solution, and Stirring treatment at 450r / min for 50min in a water bath at 55°C to obtain a mixed whisker suspension, put the mixed whisker suspension in an ultrasonic disperser, and ultrasonically treat it at 35°C with a power of 350W for 25min to obtain Mix the whisker dispersion, put the mixed whisker dispersion in a centrifuge, centrifuge at a speed of 4500r / min for 25min at room temperature, remove the lower layer of solid, wash with deionized water until neutral, and dry in an oven at 90°C 1.5h, cooled at room ...

Embodiment 3

[0041] In parts by weight, weigh 20 parts of zirconia whiskers with an average length of 30 μm, 20 parts of silicon carbide whiskers with an average length of 20 μm, 4 parts of tetraethyl orthosilicate, 20 parts of nitric acid solution with a mass fraction of 10%, 240 Add ethyl silicate and nitric acid to absolute ethanol, and stir at 250r / min for 20 minutes at room temperature to obtain a modified solution. Add zirconia whiskers and silicon carbide whiskers to the modified solution, and mix at 60 Under the condition of a water bath at 500r / min for 60min, a mixed whisker suspension was obtained. The mixed whisker suspension was placed in an ultrasonic disperser, and ultrasonically treated at 40°C with a power of 400W for 30min to obtain a mixed whisker suspension. Whisker dispersion, put the mixed whisker dispersion in a centrifuge, centrifuge at a speed of 5000r / min for 30min at room temperature, remove the lower layer of solid, wash with deionized water until neutral, and dry...

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Abstract

The invention relates to a preparation method of a high-strength casting coating for a stainless steel casting, and belongs to the technical field of casting coatings. According to the preparation method of the high-strength casting coating for the stainless steel casting, zirconium sand, zirconium oxide whiskers and silicon carbide whiskers are used as refractory fillers, the zirconium oxide whiskers and the silicon carbide whiskers are modified by ethyl orthosilicate to prepare the high-strength casting coating for the stainless steel casting, the zirconium oxide whiskers and the silicon carbide whiskers are added into the coating, so that the strength of a coating film can be effectively improved; when the whiskers are subjected to external acting force, the whiskers bridged in the coating film can generate acting force to force cracks to be closed, so that the effect of consuming some external force to do work is achieved, then the toughness and strength of the coating film are improved, and when the cracks are diffused to the whiskers from the surface of the coating film, the diffusion direction of the cracks can be changed; and the cracks are diffused along the whiskers due to dissociation of the whiskers and the coating film, so that the area of the formed new surface is increased, the cracks can be within the critical size of the new surface, and the coating film is further reinforced.

Description

technical field [0001] The invention relates to a preparation method of high-strength casting paint for stainless steel castings, belonging to the technical field of casting paint. Background technique [0002] In the entire foundry industry, the application of stainless steel castings is becoming more and more extensive. The size of stainless steel castings is also developing from small and medium-sized parts to large ones, and its structure is also becoming more and more complicated. However, how to improve and ensure the surface quality and dimensional accuracy of sand casting stainless steel castings, and how to control the surface roughness of castings has always been a concern. Mass production and practice have proved that the application of casting coatings in the pouring process is a practical and effective way to improve the surface quality of castings. Therefore, the use of casting coatings is an effective way to ensure the surface quality and dimensional accuracy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00
Inventor 赵朵
Owner 成都途伊棠涂料科技有限公司
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