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Mold-releasing type complexing agent with effects of resisting high temperature, insulating heat and demolding

A compounding agent and mold release technology, applied in the direction of casting mold, core, casting mold composition, etc., can solve the problems of no substantial improvement, mold thermal fatigue, thermal cracking, etc., to delay thermal fatigue and reduce mold temperature difference. , the effect of low thermal expansion coefficient

Active Publication Date: 2014-01-29
ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no substantial improvement for the problem of thermal fatigue and thermal cracks on the surface of the mold.

Method used

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  • Mold-releasing type complexing agent with effects of resisting high temperature, insulating heat and demolding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: Take 625g of nano-colloidal silica solution, 289g of water and stir at room temperature for 5 minutes, then add 80g of composite oxide ultrafine (average particle size 1.0μm) powder containing silicate minerals, alumina, and zirconia, stir at room temperature and slowly evenly Add 5 g of polyvinyl alcohol (200) and 1 g of hydroxyethyl cellulose, and stir at room temperature until a uniform and stable dispersion system is formed.

Embodiment 2

[0023] Example 2: Take 650g of nano-colloidal silica solution, 247g of water and stir at room temperature for 5 minutes, then add 100g of composite oxide ultrafine (average particle size 0.5μm) powder containing silicate minerals, magnesium oxide, and calcium oxide, stir at room temperature and slowly evenly Add 2 g of sodium polyacrylate and 1 g of sodium hydroxymethyl cellulose, and stir at room temperature until a uniform and stable dispersion system is formed.

Embodiment 3

[0024] Example 3: Take 700g of nano-colloidal silica solution, 177g of water and stir at room temperature for 5 minutes, then add 120g of composite oxide ultrafine (average particle size 0.8μm) powder containing silicate minerals, magnesium oxide, calcium oxide, and zirconia, and stir at room temperature And slowly and uniformly add 2.5 g of hydrolyzed polymaleic anhydride and 0.5 g of polyacrylamide, and stir at room temperature until a uniform and stable dispersion system is formed.

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Abstract

The invention provides a mold-releasing type complexing agent with effects of resisting a high temperature of more than 1450 DEG C, insulating heat and demolding and a preparation method thereof. The mold-releasing type complexing agent comprises the following raw materials in percentage by weight: 20-60% of nano colloidal silicon dioxide solution; 5-30% of composite oxide ultramicro (0.1-1.0 microns) powder including Na, Mg, Ca, Fe, Li, Al, Si, B, Zr and other elements; 0.2-2% of water-based dispersing agent;0.02-0.5% of water-based thickening agent and the balance of water; and the sum of the weight of the components is 100%. According to the mold-releasing type complexing agent with effects of resisting high temperature, insulating heat and demolding, the nano colloidal silicon dioxide solution is cooperated with the ultramicro (0.1-1.0 microns) multielement composite oxide powder, so that the excellent performances of high temperature resistance, heat insulation, demolding, environment protection and the like are achieved, the thermal fatigue resistance of the mold surface is effectively improved, and the service life of the mold is prolonged. The mold-releasing type complexing agent with effects of resisting high temperature, insulating heat and demolding is particularly applicable to using at the part of a mold directly contacting molten steel in fired mold casting and other high temperature forming technologies of metal.

Description

technical field [0001] The invention relates to a release-type compounding agent, in particular to a release-type compounding agent which is resistant to high temperatures above 1450°C and has functions of heat insulation and mold release and a preparation method thereof. Background technique [0002] Investment casting and forging is a new metal forming technology, which is to complete the forging process of parts by applying forging pressure to the semi-solid blank after injecting the molten billet into the mold cavity to fill the mold. The investment casting and forging process puts forward high requirements on the temperature resistance, mold release performance and service life of the mold. The traditional mold release agent for casting cannot meet the process requirements. Release compound agent with thermal and mold release effects. [0003] Traditional casting mold release agents generally use water-soluble release agents. Water-soluble mold release agents are usua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00B22D18/02
Inventor 范广宏何琪任明伟褚作明陈东韩雷
Owner ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH
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