Casting paint for high-chromium cast iron and preparation method thereof

A technology for casting coatings and high-chromium cast iron, which is applied to casting molding equipment, coatings, casting molds, etc., can solve the problems of stimulation, suspension and insufficient high-temperature strength, and achieve simple methods, good stability and practicability, and production low cost effect

Active Publication Date: 2013-04-24
MAANSHAN HUADA METALLURGICAL & MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problems of the above-mentioned coatings are that the suspending property and high-temperature strength are not enough, and t

Method used

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  • Casting paint for high-chromium cast iron and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The concrete steps of the preparation method of casting coating for high chromium cast iron of the present invention are as follows:

[0036] 1) Nanoscale FeCr 2 o 4 Preparation of composite powder:

[0037] ZrOCl 2 .8H 2 The concentration of O and water is 0.2mol / LZrOCl 2 aqueous solution; the mass percent concentration of 25% ammonia water was diluted 10 times as a precipitant; the ZrOCl 2 Add the aqueous solution dropwise to the precipitant at a rate of 2mL / min, and control the pH of the solution to be 9; after the dropwise addition, continue to stir for 3h, then leave it to age for 6h to obtain Zr(OH) 4 Hydrosol A is ready for use;

[0038] 20g aluminum hydroxide Al(OH) 3 Dissolve in 200mL of 10mol / L potassium hydroxide aqueous solution; then put it into a container and heat it to 120°C, keep it warm for 26 hours, filter out the precipitate with filter paper, and wash it with deionized water for 5 times; then wash the precipitate The substance was heated to ...

Embodiment 2

[0044] Wherein step 1) in the solution A, colloid B and FeCr 2 o 4 The powder is prepared and mixed according to the mass ratio of 0.6:1:1.1.

[0045] Step 3) Preparation of casting paint for medium-high chromium cast iron: the weight percentage of each component is 20% of nano-scale FeCr2O4 composite powder, 5% of slag powder, 0.15% of stearic acid (1801), 6% of lithium-based bentonite, and 3% of silica sol %, 3-methyl-2-buten-1-ol acetate compound solution 8%, corundum powder and the rest.

[0046] All the other preparation processes are the same as in Example 1.

Embodiment 3

[0048] Wherein step 1) in the solution A, colloid B and FeCr 2 o 4 The powder is prepared and mixed according to the mass ratio of 0.6:1:1.0.

[0049] Step 3) Preparation of casting coatings for medium-high chromium cast iron: the weight percentage of each component is nano-scale FeCr2O4 composite powder 16%, slag powder 4%, stearic acid (1801) 0.13%, lithium-based bentonite 4%, silica sol 2.5% %, 3-methyl-2-buten-1-ol acetate compound solution 6%, corundum powder and the rest.

[0050] All the other preparation processes are the same as in Example 1.

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Abstract

The invention relates to a casting paint for high-chromium cast iron and a preparation method thereof. The paint comprises the following components in percentage by weight: 15-20% of nano FeCr2O4 composite powder, 3-5% of furnace slag powder, 0.10-0.15% of stearic acid, 3-6% of lithium-base bentonite, 2-3% of silica sol, 5-8% of 3-methyl-2-butenyl-1-ol acetate composite solution and the balance of chrome corundum powder. The furnace slag comprises the following components in percentage by weight: 74-77% of Al2O3, 1-2% of MgO, 19-21% of Cr2O3 and the balance of SiO2. The particle size of the FeCr2O4 composite powder is 80-100 nm, the particle size of the lithium-base bentonite and furnace slag powder is 80-100 mu m, and the particle size of the chrome corundum powder is 1-5 mm. The paint has the advantages of favorable suspensibility, favorable high-temperature strength and no environmental pollution of raw materials.

Description

[0001] technical field [0002] The invention belongs to the field of casting, and relates to a lost foam casting coating for high chromium cast iron and a preparation method thereof. Background technique [0003] Application No. 200910016039.1 is a coating for lost foam cast iron. The paint includes the following components by weight, 70 parts of bauxite, 30 parts of quartz powder, 2-5 parts of bentonite, 0.5-2 parts of white latex, 0.5-1.0 parts of sodium carboxymethyl cellulose, water-soluble phenolic 2-3 parts of resin, 0.5-2 parts of attapulgite, 2-5 parts of spodumene powder, 0.01-0.03 parts of surfactant, and 0.01-0.02 parts of defoamer. The paint coating is thin and uniform, has good air permeability, the surface of the casting is smooth and smooth, and it is easy to peel off, eliminating black defects, and the surface of the casting is smooth and of high surface quality. [0004] Application No. 201210319941.2 relates to a cast iron lost foam coating and its prepa...

Claims

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Application Information

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IPC IPC(8): B22C3/00
Inventor 杨加祥陆万玉夏治寨
Owner MAANSHAN HUADA METALLURGICAL & MACHINERY
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