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A kind of high-strength surface layer material and its preparation method

A surface material, high-strength technology, applied in the direction of coating, can solve the problems of casting sand sticking, sand inclusion, affecting the surface finish of castings, casting dimensional accuracy, insufficient surface strength, etc.

Active Publication Date: 2022-03-01
ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The surface material formed by the currently used coatings for sand casting has poor suspension and the surface strength is not high enough, which will lead to sand sticking and sand inclusion in the casting, affecting the surface finish of the casting and the dimensional accuracy of the casting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A high-strength surface layer material, including the following raw materials in weight percent: ZnO modified (CTAB) 3 PW 12 o 40 Composite powder 14%, water-soluble phenolic resin 2%, ferrosilicon alloy powder 3%, KAl(SO 4 ) 2 Bentonite Composite 23%, CaAl 2 Si 2 o 8 3%, water 26%, the rest is SiO 2 Powder.

[0024] The ZnO-modified (CTAB) 3 PW 12 o 40 The preparation method of composite powder comprises the following steps:

[0025] S1, to ZnSO with a concentration of 55g / L 4 Add 2 times the molar amount of sodium hydroxide to the aqueous solution, stir and react for 1 hour, then wash the precipitate 2-3 times with distilled water and absolute ethanol respectively, put it in a drying oven to dry for 1 hour, and then calcinate at 450°C 3h, obtain ZnO powder;

[0026] S2. Add 0.5 mol of CTAB to the mixed solvent of 1000 mL of ethanol and 1000 mL of water, stir for 15 minutes, then add 0.5 mol of CTAB, stir for another 15 minutes, continue to add 0.165 mol o...

Embodiment 2

[0033] Other is the same as embodiment 1, just high-strength surface material comprises the raw material of following weight percent: ZnO modified (CTAB) 3 PW 12 o 40 Composite powder 16%, water-soluble phenolic resin 3%, ferrosilicon alloy powder 4%, KAl(SO 4 ) 2 Bentonite Composite 26%, CaAl 2 Si 2 o 8 5%, water 28%, the rest is SiO 2 Powder.

[0034] The preparation method of the high-strength surface layer material is as follows: mixing each raw material in the formula amount and stirring evenly.

[0035] Referring to the method in "JBT 9226-2008 Coatings for Molding Sand Casting", the suspension of the high-strength surface material prepared in this example was measured, and the results showed that the suspension rate was 97%.

[0036] Brush the high-strength surface material prepared in this example on the surface of the molding sand, dry it at 150°C for 1 hour to form a 0.5-1.0mm thick coating, and then use it to produce iron castings. The surface of the iron c...

Embodiment 3

[0039] Others are the same as in Example 1, but the high-strength surface layer material comprises the following raw materials in weight percent:: ZnO modified (CTAB) 3 PW 12 o 40 Composite powder 18%, water-soluble phenolic resin 5%, ferrosilicon alloy powder 6%, KAl(SO 4 ) 2 Bentonite Composite 29%, CaAl 2 Si 2 o 8 8%, water 30%, the rest is SiO 2 Powder.

[0040] The preparation method of the high-strength surface layer material is as follows: mixing each raw material in the formula amount and stirring evenly.

[0041] Referring to the method in "JBT 9226-2008 Coatings for Molding Sand Casting", the suspending property of the high-strength surface material prepared in this example was measured, and the result showed that its suspending rate was 99%.

[0042] Brush the high-strength surface material prepared in this example on the surface of the molding sand, and dry it at 150°C for 1 hour to form a coating with a thickness of 0.5 to 1.0 mm, and then use it to produ...

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Abstract

The invention discloses a high-strength surface layer material and a preparation method thereof. The high-strength surface layer material includes the following raw materials in weight percentage: ZnO modified (CTAB) 3 PW 12 o 40 Composite powder 14‑18%, water-soluble phenolic resin 2‑5%, ferrosilicon powder 3‑6%, KAl(SO 4 ) 2 Bentonite Composite 23‑29%, CaAl 2 Si 2 o 8 3‑8%, water 26‑30%, rest SiO 2 Powder; its formula is simple, with good suspension and high surface strength. When used, the raw materials can be directly mixed uniformly, the production cost is low, and the method is suitable for industrialized production.

Description

technical field [0001] The invention belongs to the technical field of coating materials, and in particular relates to a high-strength surface layer material and a preparation method thereof. Background technique [0002] Sand casting is a casting method in which castings are produced in sand molds. When using sand molds to produce castings, it is a very important process to apply casting paint on the working surface of the mold (core). The casting paint covers the surface of the sand mold (core) and is in direct contact with molten iron during casting to prevent the casting from sticking. It plays an important role in eliminating casting defects such as sand and sand inclusions, improving the surface finish of castings, and reducing the cleaning workload of castings. The strength of the surface material formed by the casting coating is the most direct factor affecting whether the casting is sand-sticking, sand inclusion, surface finish of the casting, and dimensional accur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D7/61C09D7/63C09D7/65
Inventor 赵浩峰黄俊杰
Owner ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE
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