CN105855460A - High-bending-strength quartz-based expendable pattern paint modified by mica powder and preparation method of high-bending-strength quartz-based expendable pattern paint - Google Patents
High-bending-strength quartz-based expendable pattern paint modified by mica powder and preparation method of high-bending-strength quartz-based expendable pattern paint Download PDFInfo
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- CN105855460A CN105855460A CN201610359454.7A CN201610359454A CN105855460A CN 105855460 A CN105855460 A CN 105855460A CN 201610359454 A CN201610359454 A CN 201610359454A CN 105855460 A CN105855460 A CN 105855460A
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- mica powder
- powder
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- bending
- bauxite
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
Abstract
The invention discloses high-bending-strength quartz-based expendable pattern paint modified by mica powder. The high-bending-strength quartz-based expendable pattern paint is prepared from the following raw materials in parts by weight: 100-102 parts of quartz powder, 0.9-1.1 parts of modified starch, 0.9-1.1 parts of carboxymethyl cellulose, 2.4-2.6 parts of sodium bentonite, 0.9-1 part of mica powder, 0.8-0.9 part of tetrapod ZnO whiskers, 0.9-1.1 parts of silicasol, 10-13 parts of ethanol, an appropriate amount of water, 0.8-1 part of carbon nanotubes, 2.3-2.5 parts of bauxite and 0.2-0.3 part of nanometer polytetrafluoroethylene. The carbon nanotubes and the nanometer polytetrafluoroethylene are used for modifying the bauxite, so that the smoothness of the bauxite is improved, the bauxite can be uniformly dispersed in the paint, and the heat resistance and the compactability of the paint are improved; hollow structures in the carbon nanotubes can also enable the air permeability to be improved, and the hardness and the bending strength of the paint after being dried are improved.
Description
Technical field
The present invention relates to lost foam paint technical field, particularly relate to a kind of high-flexural strength mica powder modification quartz group lost mould coating and preparation method thereof.
Background technology
Lost foam casting is the foundry engieering of a kind of Near net shape, and coating is the key point of lost foam casting, and the quality of coating property is directly connected to the quality of foundry goods.Lost foam paint is typically made up of refractory aggregate, binding agent, suspending agent, carrier, additive.Silica flour is widely used on lost foam casting as refractory aggregate cheap and easy to get, but because sintering character is poor so that it is application receives certain restriction.And the principle that lost foam paint is at the beginning of design should sinter exactly, peel off again.If sintering character can be poor under pouring temperature for refractory aggregate, then can not form the liquid phase of q.s.So coating cannot form densification and have the sinter layer of sufficient intensity, bears incessantly molten metal washing away when cast, corrosion function, and molten metal can pass through coating erosion casting mold, and foundry goods is easily generated the defects such as scab.Even if not causing scab the most easily to produce coating be bonded at the phenomenon being not easily stripped on foundry goods.The major measure improving lost foam paint sintering character has: 1. introduce suitable sintering aid, utilizes the liquid phase that sintering aid is formed, and reaches the purpose accelerating material diffusion with acceleration of sintering；2. formed composite aggregate, fusing point reduction and the temperature starting to sinter by the refractory aggregate that fusing point is different also to decrease.If selecting suitable composite aggregate and proportioning, then coating can be made to produce a certain degree of sintering under pouring temperature.This problem uses mica powder to improve the sintering character of quartz group lost mould coating as sintering aid." mica powder impact on quartz group lost mould coating sintering character " literary composition have developed a kind of lost foam paint with high refractoriness and low fever's node, and this coating has good sintering character and stripping performance.
But mica bad dispersibility in coating, suspension are poor, easily cause the bending strength after sintering uneven, and stripping performance is the most uneven, and mica slabbing, can obstructing air holes, affect gas and discharges, cause bleb phenomenon, need improvement.
Additionally also need to improve the problems such as the hardness of coating, compactness, elevated temperature strength, crack resistance, gas permeability, bending strength, sag resistance, brushing performance, agglutinating property along with the progress of foundry engieering.
Summary of the invention
The object of the invention is contemplated to make up the defect of prior art, it is provided that a kind of high-flexural strength mica powder modification quartz group lost mould coating and preparation method thereof.
The present invention is achieved by the following technical solutions:
A kind of high-flexural strength mica powder modification quartz group lost mould coating, is prepared by the raw materials in: silica flour 100-102, modified starch 0.9-1.1, carboxymethylcellulose calcium 0.9-1.1, sodium bentonite 2.4-2.6, mica powder 0.9-1, four acicular type zinc oxide crystal whisker 0.8-0.9, Ludox 0.9-1.1, ethanol 10-13, water are appropriate, CNT 0.8-1, bauxite 2.3-2.5, nanometer polytetrafluoroethylcomposite 0.2-0.3.
The preparation method of described high-flexural strength mica powder modification quartz group lost mould coating, comprises the following steps:
(1) Ludox is added in ethanol, stir, add mica powder to stir, be heated to 60-70 DEG C, add four acicular type zinc oxide crystal whisker while stirring, it is heated to 70-75 DEG C, ultrasonic disperse 3-4 minute, continues stirring complete to ethanol volatilization, pulverizes, cross 100-150 mesh sieve, obtain modified micaceous powder；
(2) by CNT, bauxite, nanometer polytetrafluoroethylcomposite mixed grinding to particle diameter less than 1 μm, powder is obtained；
(3) modified starch, carboxymethylcellulose calcium, sodium bentonite are added to the water, stir, add described modified micaceous powder and described powder, stir, obtain mixed material；
(4) described mixed material and other leftover materials are mixed into pasty state, to obtain final product.
The invention have the advantage that the application uses Ludox, four acicular type zinc oxide crystal whisker to be modified mica powder, define on mica powder surface nano silicon and and four acicular type zinc oxide crystal whisker, the dispersion stabilization making mica powder improves, and whisker can improve the caking property of mica powder and silica flour, improve cracking resistance, there is whisker to support after sintering and define uniform pore, promote that gas is discharged, reduce bleb.By using CNT, nanometer polytetrafluoroethylcomposite that bauxite is modified, improve the smoothness of bauxite, so that bauxite is dispersed in coating, improve heat resistance and the compactness of coating, prevent molten metal infiltration from causing and be stained with sand, the nanometer polytetrafluoroethylcomposite gasification when casting, owing to being Nano grade, the most tiny hole can be formed, improve gas permeability, and do not reduce intensity；The hollow structure of CNT also improves gas permeability, and improves the dried hardness of coating and bending strength.
Detailed description of the invention
A kind of high-flexural strength mica powder modification quartz group lost mould coating, is made up of the raw material of following weight portion (kilogram): silica flour 100, modified starch 0.9, carboxymethylcellulose calcium 0.9, sodium bentonite 2.4, mica powder 0.9, four acicular type zinc oxide crystal whisker 0.8, Ludox 0.9, ethanol 10, water are appropriate, CNT 0.8, bauxite 2.3, nanometer polytetrafluoroethylcomposite 0.2.
The preparation method of described high-flexural strength mica powder modification quartz group lost mould coating, comprises the following steps:
(1) Ludox is added in ethanol, stir, add mica powder and stir, be heated to 60 DEG C, add four acicular type zinc oxide crystal whisker while stirring, be heated to 70 DEG C, ultrasonic disperse 3 minutes, continues stirring complete to ethanol volatilization, pulverize, cross 100 mesh sieves, obtain modified micaceous powder；
(2) by CNT, bauxite, nanometer polytetrafluoroethylcomposite mixed grinding to particle diameter less than 1 μm, powder is obtained；
(3) modified starch, carboxymethylcellulose calcium, sodium bentonite are added to the water, stir, add described modified micaceous powder and described powder, stir, obtain mixed material；
(4) described mixed material and other leftover materials are mixed into pasty state, to obtain final product.
Being sintered at 1500 DEG C by this embodiment lost foam paint, observed by microscope, internal a small amount of macroscopic void and the most tiny small holes, in a block entirety, fissility has reached I grade, and bending strength is 9.9MPa.
Claims (2)
1. a high-flexural strength mica powder modification quartz group lost mould coating, it is characterised in that: it is prepared by the raw materials in: silica flour 100-102, modified starch 0.9-1.1, carboxymethylcellulose calcium 0.9-1.1, sodium bentonite 2.4-2.6, mica powder 0.9-1, four acicular type zinc oxide crystal whisker 0.8-0.9, Ludox 0.9-1.1, ethanol 10-13, water are appropriate, CNT 0.8-1, bauxite 2.3-2.5, nanometer polytetrafluoroethylcomposite 0.2-0.3.
The preparation method of high-flexural strength mica powder modification quartz group lost mould coating the most according to claim 1, it is characterised in that comprise the following steps:
(1) Ludox is added in ethanol, stir, add mica powder to stir, be heated to 60-70 DEG C, add four acicular type zinc oxide crystal whisker while stirring, it is heated to 70-75 DEG C, ultrasonic disperse 3-4 minute, continues stirring complete to ethanol volatilization, pulverizes, cross 100-150 mesh sieve, obtain modified micaceous powder；
(2) by CNT, bauxite, nanometer polytetrafluoroethylcomposite mixed grinding to particle diameter less than 1 μm, powder is obtained；
(3) modified starch, carboxymethylcellulose calcium, sodium bentonite are added to the water, stir, add described modified micaceous powder and described powder, stir, obtain mixed material；
(4) described mixed material and other leftover materials are mixed into pasty state, to obtain final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610359454.7A CN105855460A (en) | 2016-05-27 | 2016-05-27 | High-bending-strength quartz-based expendable pattern paint modified by mica powder and preparation method of high-bending-strength quartz-based expendable pattern paint |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610359454.7A CN105855460A (en) | 2016-05-27 | 2016-05-27 | High-bending-strength quartz-based expendable pattern paint modified by mica powder and preparation method of high-bending-strength quartz-based expendable pattern paint |
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| Publication Number | Publication Date |
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| CN105855460A true CN105855460A (en) | 2016-08-17 |
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| CN201610359454.7A Withdrawn CN105855460A (en) | 2016-05-27 | 2016-05-27 | High-bending-strength quartz-based expendable pattern paint modified by mica powder and preparation method of high-bending-strength quartz-based expendable pattern paint |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106975729A (en) * | 2017-03-07 | 2017-07-25 | 宁波麦克潘特电动工具有限公司 | A kind of lost-wax casting method of drill bit |
| CN108855841A (en) * | 2018-06-22 | 2018-11-23 | 西安工程大学 | A kind of powder porous fire-proof heat-insulating coating and preparation method thereof for aluminium alloy |
| CN112517836A (en) * | 2020-12-07 | 2021-03-19 | 安徽信息工程学院 | Tin bronze lost foam casting environment-friendly coating and preparation method thereof |
| CN112517837A (en) * | 2020-12-07 | 2021-03-19 | 安徽信息工程学院 | Aluminum bronze lost foam casting environment-friendly coating and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106975729A (en) * | 2017-03-07 | 2017-07-25 | 宁波麦克潘特电动工具有限公司 | A kind of lost-wax casting method of drill bit |
| CN106975729B (en) * | 2017-03-07 | 2019-05-24 | 宁波麦克潘特电动工具有限公司 | A kind of lost-wax casting method of drill bit |
| CN108855841A (en) * | 2018-06-22 | 2018-11-23 | 西安工程大学 | A kind of powder porous fire-proof heat-insulating coating and preparation method thereof for aluminium alloy |
| CN112517836A (en) * | 2020-12-07 | 2021-03-19 | 安徽信息工程学院 | Tin bronze lost foam casting environment-friendly coating and preparation method thereof |
| CN112517837A (en) * | 2020-12-07 | 2021-03-19 | 安徽信息工程学院 | Aluminum bronze lost foam casting environment-friendly coating and preparation method thereof |
| CN112517836B (en) * | 2020-12-07 | 2022-04-08 | 安徽信息工程学院 | Tin bronze lost foam casting environment-friendly coating and preparation method thereof |
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Application publication date: 20160817 |
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