Light-color cast iron paint with high aluminium polycrystalline composite aggreagte

A technology of aggregate and high alumina, applied in the field of light-colored cast iron coatings, can solve problems such as uneven wall thickness, achieve the effects of improving sand resistance, improving the working environment, and improving compactness

Inactive Publication Date: 2007-12-19
SHENYANG RES INST OF FOUNDRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through the high temperature of molten metal pouring, the coating can sinter the high-alumina polycrystalline composite coating in a wide temperature range to form a high-viscosity, high-density, continuous sintered ceramic coating; at the same time, in flux and Under the synergistic effect of various additives such as crystal nucleating agents, "secondary crystallization" occurs in the sintered ceramic coating, which further strengthens the high-temperature viscosity, strength and compactness of the sintered ceramic coating, thereby better solving the problem of wall Sand sticking on the surface of complex iron castings with uneven thickness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The light-colored cast iron coating of high-alumina polycrystalline composite aggregate is composed of 30% high-alumina powder, 20% mullite powder, 6% magnesia powder, 8% ultra-fine pyroxene powder, 0.5% nano-scale aluminum powder, rosin It is prepared by mixing 1%, 1% bentonite suspending agent and 33.5% ethanol with a concentration of 95-98%.

Embodiment 2

[0020] The light-colored cast iron coating of high-alumina polycrystalline composite aggregate is composed of 35% high-alumina powder, 15% mullite powder, 3.5% magnesia powder, 7% ultra-fine pyroxene powder, 3.5% nano-sized zirconium powder, and phenolic resin It is prepared by mixing 2%, 4% bentonite suspending agent and 30% ethanol with a concentration of 95-98%.

Embodiment 3

[0022] The light-colored cast iron coating of high-alumina polycrystalline composite aggregate is composed of 25% high-alumina powder, 10% mullite powder, 8% magnesia powder, 6.5% ultra-fine pyroxene powder, 1.5% nano-scale chromium powder, rosin 3%, 6% bentonite suspending agent and 40% ethanol with a concentration of 98% are mixed and prepared.

[0023] Percentages in the above three examples are percentages by weight, and the high alumina powder contains Al 2 o 3 70-85%, ultra-fine pyroxene powder or lanthanum / aluminum rare earth particle size is 100-500μm.

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PUM

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Abstract

The light-color cast iron paint with high aluminum polycrystalline composite aggregate consists of high alumina powder with 70-85 wt% Al2O3 20-40 wt%, mullite powder 10-25 wt%, magnesia powder 3-10 wt%, superfine flux of pyroxene or La/Sr RE of 100-500 micron granularity 6-10 wt%, crystal nucleus agent of nanometer level Al, Zr or Cr powder 0.5-3.5 wt%, organic adhesive rosin or resin 1-3 wt%, bentonite as suspending agent 1-6 wt% and solvent of ethanol or isopropanol 30-40 wt% mixed together. The paint of the present invention is coated to cast iron parts for machine tool, and can obtain surface quality higher than that of black graphite paint and improve operation environment.

Description

technical field [0001] The invention relates to a special cast iron coating used in the production process of iron castings, in particular to a light-colored cast iron coating of high-alumina polycrystalline composite aggregate. Background technique [0002] In recent years, with the rapid development of my country's economic construction, the output and export volume of castings have increased year by year. 90% of the foundry workshops in my country's machine tool industry have adopted the furan resin self-setting sand process. Due to the wide application of furan resin sand on iron castings, the quality, output and dust pollution of iron castings in my country have been significantly improved. However, so far, almost all cast iron manufacturers in my country still use traditional black graphite powder coatings. The serious black pollution has made the environmental protection pressure of foundry enterprises increasing; The situation that British powder is used as aggregate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00
Inventor 李玲许国宇吕德志谭锐
Owner SHENYANG RES INST OF FOUNDRY
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