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Molten titanium and titanium alloy crucible and preparation method thereof

A titanium alloy and crucible technology, which is applied in the field of titanium and titanium alloy smelting devices, can solve the problems of unsuitable industrial production, uneconomical economic cost, and easy to grow cracks, etc., and achieves easy replacement and maintenance, flexible assembly and disassembly, and low preparation cost Effect

Inactive Publication Date: 2014-07-16
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the technology disclosed in the above-mentioned patent cannot meet the requirements of industrial production due to the technical scheme of manufacturing the integral crucible by using the above-mentioned materials to be sintered after cold isostatic compacting, because the volume of the crucible required for industrial production is large, and the patent 201110350464.1 is adopted Technology is difficult to manufacture
The reasons are as follows: 1. The volume of the crucible used in industrial production is large, generally in units of tonnage. The cold isostatic pressing and sintering equipment required for the overall manufacture of the crucible are expensive, and the equipment must be specially manufactured
2. The price of the crucible manufactured as a whole is too expensive. Once it is damaged and cannot be repaired, it must be replaced as a whole, which is not economical.
3. The crucible manufactured as a whole is prone to cracks in the process of manufacture and use

Method used

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  • Molten titanium and titanium alloy crucible and preparation method thereof
  • Molten titanium and titanium alloy crucible and preparation method thereof
  • Molten titanium and titanium alloy crucible and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In this example, see figure 1 , a crucible for smelting titanium and titanium alloys, which is composed of a crucible shell 1 and a crucible lining 2, the crucible lining 2 is integrally sintered from a composite material, and the crucible lining 2 has the ability to hold titanium melt and titanium alloy The open structure of the melt, the crucible lining 2 is made of composite material, the crucible shell 1 is made of high melting point high temperature resistant material, the crucible lining 2 has a structure that matches the shape of the crucible shell 1, so that the crucible shell 1 The inner surface of the crucible fits the outer surface of the crucible lining 2, and makes the crucible shell 1 directly contact the supporting crucible lining 2, so that the crucible shell 1 can withstand the pressure generated by the titanium melt and titanium alloy melt. The main components of the crucible lining 2 Part 1 is a sintered composite material prepared by mixing the above...

Embodiment 2

[0041] This embodiment is basically the same as Embodiment 1, especially in that:

[0042] In this example, see Figure 2 to Figure 5 , the crucible lining 2 is a cup-shaped structural liner, the cup-shaped structural liner is composed of a single-layer cup-shaped structural layer, and the single-layer cup-shaped structural layer is formed by stacking a layer of composite material sintered bricks, located inside the same cup-shaped structural layer Any adjacent composite material sintered bricks are installed and connected through the combination of their concave and convex parts to form a positioning structure of concave-convex cooperation between composite material sintered bricks, so that the same cup-shaped structure layer that forms the cup-shaped structural bushing The composite material sintered bricks are integrated into one.

[0043] The preparation method of the crucible for smelting titanium and titanium alloy in this embodiment comprises the following steps:

[0...

Embodiment 3

[0050] This embodiment is basically the same as Embodiment 2, and the special features are:

[0051] In this example, see Image 6 , The cup-shaped structural bushing is composed of two cup-shaped structural layers, that is, it is made of double-layer composite sintered bricks. In this embodiment, the crucible lining 2 is stacked with double-layer composite material sintered bricks, and the composite material sintered bricks are clamped and connected, so that the crucible lining 2 forms a two-layer bushing assembly, which can more effectively absorb the heat of the molten metal. Vibration, and effectively block the infiltration of molten metal from the gap between the composite sintered bricks.

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Abstract

The invention discloses a molten titanium and titanium alloy crucible which is at least formed by combining a crucible shell and a crucible lining, wherein the crucible lining is of an opened structure capable of holding a melt and is made of a composite material; the crucible shell is made of a high-temperature-resistant material with a high melting point and is of a force bearing structure capable of bearing pressure generated by titanium melts and titanium alloy melts; the crucible lining is made of a sintered composite prepared by mixing the following main components: 45-70wt% of barium oxide, 30-50wt% of zirconium oxide and 0-5wt% of fluxing agent, wherein the fluxing agent is titanium oxide, aluminum oxide or boron oxide. The invention also discloses a preparation method of the crucible; the crucible lining is assembled in a way of stacking and combining sintered bricks and can be disassembled in a decomposition way. An inner layer material of the crucible disclosed by the invention does not react with titanium; in addition, the crucible is nonstick, capable of meeting the requirements of industrialization, large capacity, low cost, easiness for maintenance and long service life, reasonable in structure and mature in preparation process.

Description

technical field [0001] The invention relates to a metal melting special vessel and a manufacturing method thereof, in particular to a metal melting crucible and a manufacturing method thereof, which are applied in the technical field of titanium and titanium alloy melting devices. Background technique [0002] Titanium alloy has a series of excellent properties such as high specific strength, low density, and corrosion resistance, and is widely used in modern industries, such as biological science, medical engineering, aerospace industry, energy, marine, military industry and other fields. However, due to the melting point and chemical properties of titanium are very active, liquid titanium can react with almost all refractory materials used in crucibles such as zirconia, magnesia, silicon oxide and alumina during smelting. Therefore, conventional smelting cannot be adopted. Crucibles made of refractory materials are used for vacuum induction melting. At present, the indust...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C22B34/12C22C1/02
Inventor 李重河周汉贺进魏超鲁雄刚汪宏斌张捷宇
Owner SHANGHAI UNIV
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