CN102675952A - Aviation TC4 titanium plate coating and method for treating titanium plate - Google Patents
Aviation TC4 titanium plate coating and method for treating titanium plate Download PDFInfo
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- CN102675952A CN102675952A CN2012101652465A CN201210165246A CN102675952A CN 102675952 A CN102675952 A CN 102675952A CN 2012101652465 A CN2012101652465 A CN 2012101652465A CN 201210165246 A CN201210165246 A CN 201210165246A CN 102675952 A CN102675952 A CN 102675952A
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Abstract
The invention discloses an aviation TC4 titanium plate coating, which comprises an inner coating and an outer coating, wherein the inner coating comprises the following materials by weight: 35%-42% of TiO2, 6%-11% of B4C, 24%-28% of K2O.SiO2, 16%-22% of B2O3 and 6%-10% of MgO, the sum of mass percents of abovementioned raw materials is 100%; the outer coating comprises the following materials by weight: 0.7%-2.0% of B2O3, 36%-46% of Al2O3, 30%-32% of SiO2 and 23.3%-30% of KOH, and the sum of mass percents of abovementioned raw materials is 100%. The invention further provides a method for treating a titanium plate by the coating, the produced inner coating and the outer coating are brushed on the surface of the titanium plate in sequence so as to solve the problem of easy oxidation of the TC4 titanium plate while heating, and the technique performances of the titanium plate is ensured.
Description
Technical field
The invention belongs to the space flight and aviation technical field, relate to a kind of aviation TC4 titanium plate coating, the invention still further relates to and adopt this coating to handle the method for titanium plate.
Background technology
Aviation TC4 titanium plate is a present generation aircraft covering proprietary material, also is international typical titanium alloy, and chemical ingredients is Ti-6AL-4V, and this MS is 1.2-1.5mm * 800-900mm * 2100-2200mm, operative norm AMS 4911L.
What aviation TC4 titanium plate had the call is Boeing Co., European Air Passenger.Aviation TC4 titanium plate in heat-processed very easily with air in O
2In conjunction with, form TiO
2, Ti
2O
3, there is considerable part directly to be penetrated into the body of titanium plate, cause material crackle in the operation of rolling, to occur, cause final performance undesirable.
Aviation TC4 titanium plate in process of production, at first through forging, the surface begins hot rolling after stripping off the skin, remove surface contamination, titanium slab temperature in heating, the operation of rolling reacts at the oxygen of 450 ℃-1150 ℃ and air, forms TiO
2And Ti
2O
3These two kinds of compound major parts break away from from surface of metal titanium, but have considerable part directly to be penetrated into the top layer of titanium, and the degree of depth can reach 2mm, and this pollution threatens greatly the quality and the performance of product.
Usually adopt following way to avoid the oxidation of titanium plate at present: under 950 ℃ of-1100 ℃ of temperature condition of electric furnace heating; Usually adopt metallic cover method (using other metallic cover around the titanium slab of heating) or coating (titanium surfaces coated chemical substance) or blast composite algorithm (the titanium slab coats the very thin pure titanium of one deck with explosive before heating) then, solve aviation TC4 titanium plate heating pollution problems.Polluting the result who is caused the back is, obvious crackle takes place on titanium slab surface in the operation of rolling, and the degree of depth of crackle reaches 2mm-3mm, and this situation appears in whole plate face 30%, is more typical; Method protection prevents that air and titanium surface from reacting if the coating of taking, metallic cover, blast are compound etc.; Can alleviate this pollution level 80%; But these three kinds of methods cut both ways, contaminated solution problem completely fundamentally, and airborne oxygen also has part to be penetrated into the titanium surface; For military project and the needed TC4 sheet material of aviation is definitely unallowed, and the result is that cost rate is very low or off quality.
Summary of the invention
The purpose of this invention is to provide a kind of aviation TC4 titanium plate coating, solved the problem of TC4 titanium plate easy oxidation when heating, can not pollute the titanium plate, guarantee also that simultaneously the titanium plate has good use characteristics.
Another object of the present invention provides the method that above-mentioned aviation TC4 titanium plate coating is handled the titanium plate.
The technical scheme that the present invention adopted is, aviation TC4 titanium plate coating, and coating and top coating are two-layer in being divided into, and the lining coating is made up of following raw material: TiO according to mass percent
235%-42%, B
4C6%-11%, K
2OSiO
224%-28%, B
2O
316%-22%, MgO6%-10%; The mass percent summation of above raw material is 100%; Top coating is made up of following raw material: B according to mass percent
2O
30.7%-2.0%, AL
2O
336%-46%, SiO
230%-32%, KOH23.3%-30%, the mass percent summation of above raw material is 100%.
Another technical scheme that the present invention adopted is that aviation TC4 titanium plate coating is handled the method for titanium plate, specifically carries out according to following steps:
Step 1
Clean TC4 titanium plate slab;
Step 2
According to mass percent, take by weighing the TiO of 35%-42%
2, the B of 6%-11%
4C, the K of 24%-28%
2OSiO
2, the B of 16%-22%
2O
3, the MgO of 6%-10%; The mass percent summation of above raw material is 100%; With each raw materials mix, ball milling forms pulverous mixture on ball mill then, and granularity is at the 350-450 order; Add varnish and oil of bananas again, be stirred to appropriate viscosity, coated coating in making is brushed the lining coated coating at TC4 titanium steel slab surface, thickness 0.3mm, natural air drying then;
Step 3
According to mass percent, take by weighing the B of 0.7%-2.0%
2O
3, the AL of 36%-46%
2O
3, the SiO of 30%-32%
2, the KOH of 23.3%-30%, the mass percent summation of above raw material is 100%; Mix then, ball milling forms pulverous mixture on ball mill, and granularity is at the 350-450 order; Add varnish and oil of bananas again, be stirred to appropriate viscosity, brush at the undercoat outside surface, thickness 0.3mm, natural air drying is promptly accomplished the processing to TC4 titanium plate.
The invention has the beneficial effects as follows that top coating Chemical Composition boron oxide, aluminium sesquioxide, silica powder, this layer mainly solve aviation TC4 titanium slab in 450 ℃ of-1150 ℃ of intervals of Heating temperature, prevent the pollution that causes with airborne oxygen generation chemical reaction.In coating directly be coated in TC4 titanium steel slab surface, in 450 ℃ of-1150 ℃ of intervals of Heating temperature, have with titanium any reaction characteristics do not take place, stable chemical performance solves the Chemical Composition of top coating own the titanium surface is had certain pollution, plays isolation action.
Embodiment
Below in conjunction with embodiment the present invention is elaborated.
Aviation TC4 titanium plate coating of the present invention, coating and top coating are two-layer in being divided into,
In coating according to mass percent, form by following raw material:
TiO
235%-42%, B
4C6%-11%, K
2OSiO
224%-28%, B
2O
316%-22%, MgO6%-10%; The mass percent summation of above raw material is 100%;
Top coating is made up of following raw material according to mass percent:
B
2O
30.7%-2.0%, AL
2O
336%-46%, SiO
230%-32%, KOH23.3%-30%, the mass percent summation of above raw material is 100%.
In of the present invention in the middle of the coating,
Titanium oxide TiO
2: titanium oxide forms the complete system of adhering to; Very good at normal temperature and high temperature (1150 ℃) chemicalstability; With titanium any reaction not taking place, can prevent effectively that titanium from reacting at any gas of when heating and air, be in coating prevent the raw material that top coating and titanium surface react.
Norbide B
4C: titanium in Heating temperature more than 1000 ℃ the time, with outer field AL
2O
3And B
2O
3React, generate 9AL
2O
32B
2O
3Styloid, form glassy fluid distribution in the titanium steel slab surface, this glassy fluid can bear the pressure of 20MPa, the ultimate compression strength when improving high temperature, and the 9AL that generates
2O
32B
2O
3Crystal, volumetric expansion can be in the titanium operation of rolling, along with the sheet material elongation of the distortion of several times, several times and extend.The material of main part of coating in being.
Potassium silicate K
2OSiO
2: play the effect of supercoat, any chemical reaction does not take place at 350 ℃-1156 ℃ with surface of metal titanium in stable chemical performance.
Boron oxide B
2O
3: fusing point is 450 ℃, is the important raw and processed materials of making glass, utilizes the low characteristics of this material melting point, prevents the titanylization between 450 ℃-700 ℃.
Natural manganese dioxide MgO: play and absorb airborne moisture and carbonic acid gas gradually.Barrier material.In being coating for prevent top coating when the high temperature to the most effective material of titanium surface contamination.
In the middle of the top coating of the present invention,
AL
2O
3: high temperature resistant with this powder, chemical property is more stable, is the main raw of top coating, and this material of experiment proof is the important materials of anti-oxidation.
SiO
2: utilize this material having effect necessarily softening, viscosity more than 450 ℃, along with metal deformation, can be attached to the surface uniformly, the coefficient of expansion is little.Simultaneously, can prevent effectively that the titanium heating from being oxygenizement.
Boron oxide B
2O
3Effect: at room temperature, flint glass shape crystal or powder, fusing point is 450 ℃, utilizes the low characteristics of this melting point substance, 450 ℃-700 ℃ interval surface lubrication and secluding air and titanium react when guaranteeing the titanium alloy heating.
The effect of KOH: this material is 360 ℃ of fusing points, and 1320 ℃ of boiling points very easily absorb moisture and carbonic acid gas (generation salt of wormwood) from air, and this material is coated on the top coating, can effectively absorb airborne moisture content, slows down the titanium surface oxidation.
Aviation TC4 titanium plate coating of the present invention is handled the method for titanium plate, specifically carries out according to following steps:
Step 1
Clean TC4 titanium plate slab;
Step 2
According to mass percent, take by weighing the TiO of 35%-42%
2, the B of 6%-11%
4C, the K of 24%-28%
2OSiO
2, the B of 16%-22%
2O
3, the MgO of 6%-10%; The mass percent summation of above raw material is 100%; With each raw materials mix, ball milling forms pulverous mixture on ball mill then, and granularity is at the 350-450 order; Add varnish and oil of bananas again, be stirred to appropriate viscosity, coated coating in making is brushed the lining coated coating at TC4 titanium steel slab surface, thickness 0.3mm, natural air drying then;
Step 3
According to mass percent, take by weighing the B of 0.7%-2.0%
2O
3, the AL of 36%-46%
2O
3, the SiO of 30%-32%
2, the KOH of 23.3%-30%, the mass percent summation of above raw material is 100%; Mix then, ball milling forms pulverous mixture on ball mill, and granularity is at the 350-450 order; Add varnish and oil of bananas again, be stirred to appropriate viscosity, brush at the undercoat outside surface, thickness 0.3mm, natural air drying is promptly accomplished the processing to TC4 titanium plate.
In after coating and external coating all be coated in the titanium slab, routinely the titanium alloy slab production technology heat, rolling.
The titanium slab in when heating; A kind of coating of the normal custom of people prevents that titanium alloy slab from polluting and oxidation, just titanium alloy slab is constituted micropollution but problem is a coating chemical ingredients itself, so after being coated with a kind of coating; Though solved titanium alloy basically when heating and the pollution of air; Its spinoff is that microchemical reaction takes place for some element of coating and titanium surface, is unallowed for strict aircraft proprietary material but meanwhile.
Thinking of the present invention is; Coating and top coating in coating is decomposed into, lining coating salient features are to prevent and isolated top coating, are not polluted by some chemical ingredients of top coating when guaranteeing the heating of titanium slab; And the effect of top coating mainly is to prevent air and titanylization, and extends when the flow of metal.In coating directly contact the titanium surface, be coated with top coating again, the isolated titanium slab that top coating can be in full force and effect reacted in when heating and atmospheric oxygen, both are indispensable.
Embodiment 1
Clean TC4 titanium plate slab; According to mass percent, take by weighing 42% TiO
2, 6% B
4C, 24% K
2OSiO
2, 22% B
2O
3, 6% MgO; With each raw materials mix, ball milling forms pulverous mixture on ball mill then, and granularity is at the 350-450 order; Add varnish and oil of bananas again, be stirred to appropriate viscosity, coated coating in making is brushed the lining coated coating at TC4 titanium plate steel slab surface, thickness 0.3mm, natural air drying then; According to mass percent, take by weighing 0.7% B then
2O
3, 46% AL
2O
3, 30% SiO
2, 23.3% KOH mixes then, and ball milling forms pulverous mixture on ball mill, and granularity is at the 350-450 order; Add varnish and oil of bananas again, be stirred to appropriate viscosity, brush at the undercoat outside surface, thickness 0.3mm, natural air drying is promptly accomplished the processing to TC4 titanium plate.
Embodiment 2
Clean TC4 titanium plate slab; According to mass percent, take by weighing 35% TiO
2, 11% B
4C, 28% K
2OSiO
2, 16% B
2O
3, 10% MgO; With each raw materials mix, ball milling forms pulverous mixture on ball mill then, and granularity is at the 350-450 order; Add varnish and oil of bananas again, be stirred to appropriate viscosity, coated coating in making is brushed the lining coated coating at TC4 titanium plate steel slab surface, thickness 0.3mm, natural air drying then; According to mass percent, take by weighing 2% B then
2O
3, 36% AL
2O
3, 32% SiO
2, 30% KOH mixes then, and ball milling forms pulverous mixture on ball mill, and granularity is at the 350-450 order; Add varnish and oil of bananas again, be stirred to appropriate viscosity, brush at the undercoat outside surface, thickness 0.3mm, natural air drying is promptly accomplished the processing to TC4 titanium plate.
Embodiment 3
Clean TC4 titanium plate slab; According to mass percent, take by weighing 38% TiO
2, 9% B
4C, 26% K
2OSiO
2, 19% B
2O
3, 8% MgO; With each raw materials mix, ball milling forms pulverous mixture on ball mill then, and granularity is at the 350-450 order; Add varnish and oil of bananas again, be stirred to appropriate viscosity, coated coating in making is brushed the lining coated coating at TC4 titanium plate steel slab surface, thickness 0.3mm, natural air drying then; According to mass percent, take by weighing 1.5% B then
2O
3, 41% AL
2O
3, 31% SiO
2, 26.5% KOH mixes then, and ball milling forms pulverous mixture on ball mill, and granularity is at the 350-450 order; Add varnish and oil of bananas again, be stirred to appropriate viscosity, brush at the undercoat outside surface, thickness 0.3mm, natural air drying is promptly accomplished the processing to TC4 titanium plate.
With handling TC4 titanium plate later rolling 5mm, 10mm, 8mm respectively among the embodiment 1-3, under 1000 ℃, 800 ℃, 900 ℃ temperature, heated 60 minutes respectively, to handle TC4 titanium plate later with the coating that does not have heating and detect, its bending angle is seen table 1:
Table 1
Bending angle is to detect titanium surface contamination method in common, and by the GB6613-86 standard of China, aviation TC4 titanium plate bending angle must not be less than 30 °, and bending angle is a check titanium surface contamination universal method, and bending angle can be thought surface no-pollution greater than 30 °.Can explain significantly that through table 1 to the free of contamination sign of aviation TC4 titanium plate, the material property of bending angle in when heating with when not heating is close after 2 coatings.
Claims (2)
1. an aviation TC4 titanium plate coating is characterized in that coating and top coating are two-layer in being divided into, said in coating according to mass percent, form by following raw material:
TiO
235%-42%, B
4C6%-11%, K
2OSiO
224%-28%, B
2O
316%-22%, MgO 6%-10%; The mass percent summation of above raw material is 100%;
Said top coating is made up of following raw material according to mass percent:
B
2O
30.7%-2.0%, AL
2O
336%-46%, SiO
230%-32%, KOH23.3%-30%, the mass percent summation of above raw material is 100%.
2. the method for an aviation TC4 titanium plate coating processing titanium plate is characterized in that, specifically carries out according to following steps:
Step 1
Clean TC4 titanium plate slab;
Step 2
According to mass percent, take by weighing the TiO of 35%-42%
2, the B of 6%-11%
4C, the K of 24%-28%
2OSiO
2, the B of 16%-22%
2O
3, the MgO of 6%-10%; The mass percent summation of above raw material is 100%; With each raw materials mix, ball milling forms pulverous mixture on ball mill then, and granularity is at the 350-450 order; Add varnish and oil of bananas again, be stirred to appropriate viscosity, coated coating in making is brushed the lining coated coating at TC4 titanium steel slab surface, thickness 0.3mm, natural air drying then;
Step 3
According to mass percent, take by weighing the B of 0.7%-2.0%
2O
3, the AL of 36%-46%
2O
3, the SiO of 30%-32%
2, the KOH of 23.3%-30%, the mass percent summation of above raw material is 100%; Mix then, ball milling forms pulverous mixture on ball mill, and granularity is at the 350-450 order; Add varnish and oil of bananas again, be stirred to appropriate viscosity, brush at the undercoat outside surface, thickness 0.3mm, natural air drying is promptly accomplished the processing to TC4 titanium plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210165246.5A CN102675952B (en) | 2012-05-25 | 2012-05-25 | Aviation TC4 titanium plate coating and method for treating titanium plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210165246.5A CN102675952B (en) | 2012-05-25 | 2012-05-25 | Aviation TC4 titanium plate coating and method for treating titanium plate |
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| Publication Number | Publication Date |
|---|---|
| CN102675952A true CN102675952A (en) | 2012-09-19 |
| CN102675952B CN102675952B (en) | 2014-02-26 |
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|---|---|---|---|
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4193808A (en) * | 1977-03-02 | 1980-03-18 | Institut Obschei i Neorganicheskoi Khimii Akademii Nauk Belorusskoi SSR | Enamel for coating steel articles |
| SU1595807A1 (en) * | 1988-02-16 | 1990-09-30 | Днепропетровский химико-технологический институт им.Ф.Э.Дзержинского | Enamel |
| CN1327885A (en) * | 2001-06-29 | 2001-12-26 | 沈阳黎明航空发动机集团公司 | Process for preparing high-temp protecting layer on surface of metal |
| CN101665371A (en) * | 2009-08-25 | 2010-03-10 | 北京百慕航材高科技股份有限公司 | Anti-oxidization coating made of carbon-carbon composite material |
-
2012
- 2012-05-25 CN CN201210165246.5A patent/CN102675952B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4193808A (en) * | 1977-03-02 | 1980-03-18 | Institut Obschei i Neorganicheskoi Khimii Akademii Nauk Belorusskoi SSR | Enamel for coating steel articles |
| SU1595807A1 (en) * | 1988-02-16 | 1990-09-30 | Днепропетровский химико-технологический институт им.Ф.Э.Дзержинского | Enamel |
| CN1327885A (en) * | 2001-06-29 | 2001-12-26 | 沈阳黎明航空发动机集团公司 | Process for preparing high-temp protecting layer on surface of metal |
| CN101665371A (en) * | 2009-08-25 | 2010-03-10 | 北京百慕航材高科技股份有限公司 | Anti-oxidization coating made of carbon-carbon composite material |
Non-Patent Citations (2)
| Title |
|---|
| YUMING XIONG ET AL.: "Effect of vitreous enamel coating on the oxidation behavior of Ti6Al4V and TiAl alloys at high temperatures", 《JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH》 * |
| 陈其芳等: "玻璃润滑涂料对钛合金模锻的抗氧化防护作用", 《材料保护》 * |
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| Publication number | Publication date |
|---|---|
| CN102675952B (en) | 2014-02-26 |
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Granted publication date: 20140226 Termination date: 20170525 |