Method for preparing titanium alloy ingots through electron-beam cold bed furnaces by adopting conventional raw materials

An electron beam cooling bed furnace and titanium alloy technology, which is applied in the field of preparing titanium alloy ingots by using conventional raw materials in electron beam cooling bed furnaces, can solve the problems of limited output of returned materials, difficulty in composition control and high degree of vacuum, so as to reduce the difficulty of preparation , The preparation process is simple and the performance is excellent.

Inactive Publication Date: 2009-11-25
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Application Information

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Problems solved by technology

However, the process has a high degree of vacuum during the smelting process, and it is difficult to control the composition of Al, Cr, Mn and other elements whose vapor pressure is higher than that of Ti.
At present, the electron beam cold hearth furnace one-time smelting titanium alloy ingot technology uses a large number of returned materials, but the output of returned materials is still quite limited, thus limiting the application of this technology in titanium alloy ingot smelting

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  • Method for preparing titanium alloy ingots through electron-beam cold bed furnaces by adopting conventional raw materials

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Embodiment 1

[0024] Such as figure 1 As shown, the electron beam cooling hearth furnace of the present invention adopts the method for preparing titanium alloy ingot with conventional raw materials, comprising the following steps:

[0025] Step 1. Determine the type of each component and the corresponding addition amount of the raw materials for preparing titanium alloy ingots. The raw materials for preparing titanium alloy ingots are composed of simple aluminum, an intermediate alloy of aluminum, additional additives, and titanium sponge as a matrix Composition: firstly, according to the formula M=(0.5~0.7)X+(0.7~0.9)Y, the addition amount of elemental aluminum and aluminum intermediate alloy in the raw material for titanium alloy ingot casting is determined, wherein X is the addition amount of elemental aluminum, Y is the amount of aluminum master alloy added, and M is the content of aluminum in the titanium alloy ingot that needs to be prepared; secondly, according to the actual composi...

Embodiment 2

[0035] In this example, the difference from Example 1 is that the aluminum master alloy is Al-60Mo alloy and Al-10Si alloy. Fe<0.3wt%, Si<0.3wt%, C<0.3wt% in Al-60Mo alloy; Fe<0.3wt%, O<0.15wt%, C<0.1wt%, N<0.1wt% in Al-10Si alloy %. The elemental aluminum is aluminum beans (Al beans), wherein Fe<0.2wt%, Si<0.12wt%, Ga<0.03wt%, Cu<0.01wt%, Mg<0.01wt%, Zn<0.03wt%. The titanium alloy ingot to be prepared is TC11 titanium alloy ingot, and its actual composition is Al: 6.2-6.9wt%, Mo: 3.53-3.89wt%, Zr: 1.34-1.63wt%, Si: 0.3-0.32wt% %. The additional additive is zirconium sponge, wherein Si<0.01wt%, O<0.1wt%, C<0.05wt%, N<0.2wt%, H<0.0125wt%. The weight percentages of each component of the raw materials for preparing titanium alloy ingots are: Al-60Mo alloy 5.83wt%, Al-10Si alloy 3wt%, sponge titanium 83.67wt%, Al bean 6wt%, sponge zirconium 1.5wt%.

[0036] First, weigh 5.83wt% Al-60Mo alloy, 3wt% Al-10Si alloy, 83.67wt% titanium sponge, 6wt% Al bean, and 1.5wt% zirconium spon...

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Abstract

The invention discloses a method for preparing titanium alloy ingots through electron-beam cold bed furnaces by adopting conventional raw materials. The method comprises the following steps: firstly, determining the species of every component of raw material for preparing the titanium alloy ingots, as well as corresponding addition amount thereof; secondly, weighing; thirdly, mixing the weighed components of the raw material for preparing the titanium alloy ingots, putting the mixture into an oil press and pressing the mixture to form electrodes; and fourthly, adopting an electron-beam cold bed furnace to melt and mold the pressed electrodes in succession and obtaining the molded titanium alloy ingots. The method has the advantages of simple process, convenient operation, good use effects and the capability of adopting simple-substance aluminum and master alloy of the aluminum and other conventional raw materials to successfully prepare the titanium alloy ingots. In addition, the prepared titanium alloy ingots have excellent performance and can effectively solve the defect and deficiency that the prior process for producing the titanium alloy ingots needs to use a large amount of return material.

Description

technical field [0001] The invention belongs to the technical field of manufacturing titanium alloy ingots, and in particular relates to a method for preparing titanium alloy ingots by using conventional raw materials in an electron beam cooling bed furnace. Background technique [0002] Metallurgical defects such as high-density inclusions and low-density inclusions often appear in titanium alloy ingots, and the above defects become the source of fatigue cracks of titanium alloy parts and reduce the service life of titanium alloy parts. In order to produce high-quality and high-clean titanium alloys for aero-engine rotating parts, in the late 1980s, cold bed melting technology was introduced internationally. So far, the three major titanium companies in the United States are equipped with cold hearth furnaces, and have formed a cold hearth furnace production capacity of 35,000T / year. About 40% of the titanium alloy ingots for aircraft engine rotating parts in the United St...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C14/00
Inventor 毛小南于兰兰雷文光侯智敏张英明罗雷
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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