CN200986389Y - Crucible lining for titanium and titanium alloy fusion - Google Patents
Crucible lining for titanium and titanium alloy fusion Download PDFInfo
- Publication number
- CN200986389Y CN200986389Y CN 200520058677 CN200520058677U CN200986389Y CN 200986389 Y CN200986389 Y CN 200986389Y CN 200520058677 CN200520058677 CN 200520058677 CN 200520058677 U CN200520058677 U CN 200520058677U CN 200986389 Y CN200986389 Y CN 200986389Y
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- titanium
- crucible
- boron nitride
- crucible lining
- brick
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Abstract
The utility model belongs to the field of high temperature resistant smelting material, and relates to a crucible lining used for smelting of titanium and titanium alloy. The crucible lining used for smelting of titanium and titanium alloy provided by the utility model is of cup-shaped structure laid with bricks made of borazon monocrystal. The crucible lining provided by the utility model can be arranged in an enclosure which has the functions of insulation and bearing force, can meet requirement of industrial process; the manufacture process is well developed; the device has simple structure, stable nature, is easy to be maintained. The alloy does not adhere to the crucible lining; a large melting bath is formed inside the crucible lining to facilitate diffusion of alloy elements; smelted and cast alloy ingredients are uniform and the alloy has stable nature.
Description
Technical field
The utility model belongs to the high temperature resistant melt refining material, especially relates to crucible lining and manufacture method thereof that a kind of titanium or titanium alloy melting is used.
Background technology
Because the fusing point of titanium is high and chemical property is very active, liquid titanium almost can all react with refractory material such as zirconia, magnesia, silica and aluminium oxide with all crucibles when its melting, therefore, causes its melting can not adopt induction furnace melting.Vacuum consumable electrode electric arc skull melting and the cooling of Forced water cooling copper crucible are often adopted in present industrial titanium or titanium alloy melting.Earlier on copper mould wall, solidify skim " scull " during the vacuum arc skull melting, play protection titanium liquid and do not polluted and heat-blocking action, so that in crucible, form a molten bath by crucible material.Make titanium liquid temp field inhomogeneous because water jacketed copper crucible cools off very fast and forms scull, add that titanium alloy is short in the liquid retention time, feasible cast back titanium alloy casting uneven components.Uneven components is very big to the performance impact of alloy, and is very sensitive to composition as the transformation temperature of Ti-Ni marmem.Specific energy consumption is big mutually with vacuum induction melting for the vacuum arc skull melting, and the smelting titanium alloy power consumption is 40～60kw/kg.For addressing the above problem, the someone proposes to make the titanium or titanium alloy melting kettle with calcium oxide.But calcium oxide is difficult to sinter molding, and lime crucible is easy to hydrolysis under air, and oxygen content can increase in the titanium alloy of this external application lime crucible melting, influences the performance of titanium alloy.The inventor discloses a kind of titanium or titanium alloy melting kettle material and has reached the manufacture method of being made crucible by this material in Chinese patent ZL200410025119.0, adopting boron nitride and an amount of flux is raw material, by be pressed into the crucible blank through isostatic cool pressing, 1800 ℃ of following sintering 1 hour, get final product the melting kettle finished product, and on laboratory scale is used, obtained good effect, have under the high temperature and titanium does not react, not with alloy bonding; Energy consumption is low, the alloying component behind the smelting and pouring is even, the advantage of stable performance.But the technology of above-mentioned patent disclosure, owing to adopt boron nitride to add the technical scheme of the whole crucible of manufacturing of an amount of flux thermal sintering behind the isostatic cool pressing base, can't satisfy industrial production requirement, because the required melting kettle volume of industrialized production is big, adopt the technology of patent ZL200410025119.0 to be difficult to manufacture, its reason is: (1), suitability for industrialized production use crucible (generally being unit with ton) volume big, equipment such as required isostatic cool pressing that boron nitride crucible is whole when making, sintering require high price expensive, and equipment will be made especially.(2), boron nitride crucible made in one piece is too expensive, in case damage and can't repair, must integral replacing, financial cost is uneconomical.(3), easily crack in boron nitride crucible manufacturing made in one piece and the use.Thereby need improve existing technology, new technical scheme is proposed, improve the shortcoming of prior art.
Summary of the invention
The crucible lining that provides a kind of titanium or titanium alloy melting to use is provided the purpose of this utility model.
The crucible lining that a kind of titanium or titanium alloy melting is used is characterized in that, described crucible lining is to be raw material or to add an amount of flux with boron nitride be the cup-shaped structure that can contain titanium or titanium alloy liquid that the brick of raw material manufacturing is piled into boron nitride.
---described boron nitride is a raw material or to add an amount of flux with boron nitride be the location structure that can form concavo-convex cooperation between the brick made of raw material.
---described crucible lining is to be raw material or to add an amount of flux with boron nitride be the cup-shaped structure that the individual layer brick that is piled into of the brick of raw material manufacturing or double-deck brick or two-layer above brick form with boron nitride.
---described flux comprises two kinds in the following compound, i.e. magnesia, aluminium oxide, zirconia, boron oxide, boron carbide, titanium carbide at least; The consumption of described flux is 0.5～5% (percentage by weight) of boron nitride weight.
---the outer surface of described crucible lining is enclosed with the housing with thermal insulation, insulation, load function that is complementary with the crucible lining shape.Housing can reduce the diffusion of heat, saves the energy, and helps keeping the temperature in titanium or titanium alloy molten bath.
Advantage of the present utility model is:
(1), is raw material with the boron nitride or adds the boron nitride brick that an amount of flux is the fritter made of raw material with boron nitride, can be by the traditional handicraft manufacturing of sinter molding behind the isostatic cool pressing base, equipment needed thereby is simple, technical maturity, and constant product quality is good.The boron nitride brick that can adopt the boron nitride monocrystal material to make under the special situation, performance are excellent more, but this monocrystalline boron nitride brick cost is higher, is suitable for the melting of special titanium alloy.
(2) the boron nitride brick can manufacture the concavo-convex location structure that cooperatively interacts, and conveniently is piled into the liner of crucible, also conveniently pulls down replacing when damaging, and maintenance cost is low.
(3) can be piled into the big crucible (generally being unit with ton) that suitability for industrialized production is used, cost is low.
(4) boron nitride brick volume is little, is not easy to crack in the manufacturing and the use, and crucible life is long.
(5) can form big molten bath in the crucible lining of the utility model, be convenient to the diffusion of alloying element, the alloying component behind the smelting and pouring is even, and alloy property is stable.Simultaneously the boron nitride liner and the titanium of crucible do not react, not with alloy bonding, and " scull " phenomenon that occurs during no Forced water cooling copper crucible melting titanium or titanium alloy, lumber recovery height.
(6) greatly reduce energy consumption, the power consumption during the titanium or titanium alloy melting only is 2～3kw/kg.
Description of drawings
Fig. 1 is the structural representation of the crucible lining of the utility model.
The structural representation of the crucible lining of the utility model that Fig. 2 is piled into for double-deck brick.
Fig. 3 is the structural representation of the boron nitride brick of the crucible lining of formation the utility model.
Fig. 4 is the schematic diagram of piling up method of the crucible lining of the utility model.
Fig. 5 is placed in the interior structural representation of crucible housing for the crucible lining of the utility model.
Among the above-mentioned figure: 1 is the liner of the crucible of the utility model, and 2 is the boron nitride brick that constitutes the crucible lining of the utility model, and 3 is housing.
The specific embodiment
Boron nitride powder is made brick shape blank through isostatic cool pressing in mould,, can obtain the boron nitride brick, the boron nitride brick is piled into cup-shaped, promptly obtained the liner of the crucible of the utility model at 1800 ℃ of following sintering 1-2 hours.After this crucible being installed in the housing of crucible, place the vaccum sensitive stove smelting titanium alloy, its average power consumption is 2-3kw/kg.The liner of crucible does not at high temperature react with titanium during melting, not with alloy bonding.The molten bath good fluidity, the alloying component behind the smelting and pouring is even, stable performance.Referring to figs. 1 to Fig. 5.
Also can adopt boron nitride to add an amount of flux is the boron nitride brick that raw material are made, concrete manufacturing process is as follows: mix with boron nitride powder and an amount of flux, help appearance agent (percentage by weight) to be respectively: 0.5% zirconia, 1% magnesia and 1.5% boron oxide; Be pressed into the crucible blank through isostatic cool pressing, 1800 ℃ of following sintering 1 hour, get final product the boron nitride brick.
The boron nitride brick can have different geometries, particularly can be designed to the shape that can locate mutually of concavo-convex cooperation, not only can conveniently be piled into liner, and is convenient to change after the damage of boron nitride brick.
When adopting the boron nitride brick to pile up liner, can pile up, also can adopt bilayer or nitride multilayer boron brick to pile up, can decide according to the size and the capacity of the crucible that specifically will pile up with individual layer boron nitride brick.
The liner that the boron nitride brick is piled up can be installed in the housing of crucible, and housing can adopt the refractory material manufacturing, reaches the function of thermal insulation, insulation, load.Housing can reduce the diffusion of heat, saves the energy, and helps keeping the temperature in titanium or titanium alloy molten bath.
Should be noted that herein openly can replace with the identical structure of other effect that the embodiment that while the utility model is introduced realizes unique structure of the present utility model with the structure of explanation.Though preferential embodiment of the present utility model is introduced in this article and is illustrated; but those skilled in the art know and know that these embodiment illustrate; those skilled in the art can make countless variations, improvement and replacement; and can not break away from the utility model; therefore, should be according to the next qualification protection domain of the present utility model of the spirit and scope of the utility model appending claims.
Claims (4)
1, the crucible lining used of a kind of titanium or titanium alloy melting is characterized in that, described crucible lining is to be raw material or to add an amount of flux with boron nitride be the cup-shaped structure that can contain titanium or titanium alloy liquid that the brick of raw material manufacturing is piled into boron nitride.
2, the crucible lining used of a kind of titanium or titanium alloy melting according to claim 1 is characterized in that, described boron nitride is a raw material or to add an amount of flux with boron nitride be the location structure that can form concavo-convex cooperation between the brick made of raw material.
3, the crucible lining used of a kind of titanium or titanium alloy melting according to claim 1, it is characterized in that described crucible lining is to be raw material or to add an amount of flux with boron nitride be the cup-shaped structure that the individual layer brick that is piled into of the brick of raw material manufacturing or double-deck brick or two-layer above brick form with boron nitride.
4, the crucible lining used of a kind of titanium or titanium alloy melting according to claim 1 is characterized in that the outer surface of described crucible lining is enclosed with the housing with thermal insulation, insulation, load function that is complementary with the crucible lining shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520058677 CN200986389Y (en) | 2005-05-26 | 2005-05-26 | Crucible lining for titanium and titanium alloy fusion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520058677 CN200986389Y (en) | 2005-05-26 | 2005-05-26 | Crucible lining for titanium and titanium alloy fusion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200986389Y true CN200986389Y (en) | 2007-12-05 |
Family
ID=38915846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520058677 Expired - Fee Related CN200986389Y (en) | 2005-05-26 | 2005-05-26 | Crucible lining for titanium and titanium alloy fusion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200986389Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102419083A (en) * | 2011-11-16 | 2012-04-18 | 范圣良 | Kiln body of cement shaft kiln |
-
2005
- 2005-05-26 CN CN 200520058677 patent/CN200986389Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102419083A (en) * | 2011-11-16 | 2012-04-18 | 范圣良 | Kiln body of cement shaft kiln |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071205 Termination date: 20100526 |