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Method for smelting TA10 titanium alloy by using electron beam cold hearth

An electron beam cooling hearth furnace and titanium alloy technology, applied in the field of titanium alloy, can solve the problems of poor distribution uniformity of TA10 alloy and excessive volatilization of Ni element, etc., and achieve the effect of fast melting speed, good surface quality and high yield

Active Publication Date: 2018-08-10
QINGHAI JUNENG TITANIUM IND CO LTD
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  • Summary
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  • Description
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Problems solved by technology

Baoji Titanium Industry Co., Ltd. and Yunnan Titanium Industry Co., Ltd. respectively conducted research on the one-time forming process of electron beam cold hearth furnace melting of TA10 titanium alloy. The research shows that: in the process of smelting TA10 titanium alloy There are problems of excessive volatilization of Ni element and poor distribution uniformity of prepared TA10 alloy

Method used

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  • Method for smelting TA10 titanium alloy by using electron beam cold hearth
  • Method for smelting TA10 titanium alloy by using electron beam cold hearth
  • Method for smelting TA10 titanium alloy by using electron beam cold hearth

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Embodiment 1

[0069] The pressing of embodiment 1 material piece 1#~5#, comparative sample piece D1#-D2#

[0070] Raw materials containing titanium, nickel and molybdenum are mixed to make the same exact mass of raw material blocks, which are pressed into specific size blocks and dried. Table 1 shows the composition and preparation conditions of the materials of blocks 1# to 5#.

[0071] Table 1

[0072]

[0073] Taking material block 1# as a typical representative to illustrate the preparation method of the material block, the preparation process is as follows:

[0074] a. Sponge titanium (grade 0) and Ni-Mo master alloy with a total weight of 640Kg are all pressed into raw material blocks after mixing. 32 pieces;

[0075] b. The size of the pressed alloy block is: 200mm×200mm×170mm;

[0076] c. Each electronic scale must be calibrated before use, and the measurement accuracy must be tested with a test weight. After the alloy bag is weighed and bagged, it needs to be re-weighed; We...

Embodiment 2

[0078] The feeding method of embodiment 2 material block 1#~5#, comparison sample material block D1#~D2#

[0079] Put the prepared material block 1#~5# and the comparison sample material block D1#~2# into the feeder 3 of the electron beam cooling bed melting furnace as shown in Table 2 to smelt the TA10 titanium alloy. Block 1# is a typical representative to explain the stacking rules of the material block, and the stacking requirements are:

[0080] a. General requirements for stacking

[0081] Stacking rules on the left: 4 blocks in each row, placed in a single layer, a total of 16 alloy blocks are stacked, a total of 4 rows;

[0082] Stacking rules on the right side: 4 blocks in each row, placed in a single layer, a total of 16 alloy blocks are stacked, totaling 4 rows.

[0083] b. The specific stacking position is shown in Table 2: (A represents the feed block in the stage of gun opening and ingot bottom making, and B represents the feed block in the stable smelting stag...

Embodiment 3

[0087] The preparation of embodiment 3 ingot 1#~5#, comparison sample ingot D1#~D2#

[0088] Put the material blocks 1#~5# prepared in Example 1 and the comparative sample blocks D1#~2# in the feeder according to the stacking rules of Example 2, and then smelt them in the electron beam cooling hearth furnace through the following steps to prepare cast iron. The ingots are respectively marked as ingots 1#~5#, and the comparison sample ingots D1#~D2#. The electron beam cooling furnace melting process includes the following stages:

[0089] (1) Start the electron gun stage

[0090] The stage of firing the gun: heat the condensate shell without melting it, and observe the change of vacuum in the furnace. During the oven drying period, the current range of 1~5# guns should be strictly controlled not to exceed 5.0A; at the same time, the current range of 6~7# guns should be started to not exceed 2.0A to preheat the bottom support. After confirming that all electron guns are in nor...

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Abstract

The invention discloses a method for smelting a TA10 titanium alloy by using an electron beam cold hearth, and belongs to the field of titanium alloys. The method comprises the following steps that (1), materials containing titanium, nickel and molybdenum are mixed and pressed into a material block, and then the material block is dried; and (2) the dried material block is subjected to smelting byusing the electron beam cold hearth, and the TA10 titanium alloy is obtained. Electron beam cold hearth smelting comprises a gun starting stage, a casting ingot bottom making stage, and a stable smelting stage; and the electron beam cold hearth comprises a melting zone, a refining zone and a crystallization zone which are sequentially adjoined, the power of the melting zone in the stable smeltingstage is 800-1100 Kw, the power of the refining zone is 150-180 Kw, and the power of the crystallization zone is 180-210 Kw. The TA10 titanium alloy prepared through the method is good in element distribution uniformity and surface quality.

Description

technical field [0001] The application relates to a method for melting a TA10 titanium alloy by using an electron beam cold hearth furnace, which belongs to the field of titanium alloys. Background technique [0002] With the rapid growth of the amount of titanium alloy used in the aviation industry, the metallurgical quality of the alloy is becoming more and more important. According to statistics from various countries, many flight accidents are caused by premature failure due to metallurgical defects of titanium alloy components. In order to produce high-quality and high-clean titanium alloys for aero-engine rotating parts, in the late 1980s, the cooling bed melting technology was introduced internationally. , has unique advantages in the production of titanium alloy ingots for key aviation components. Electron beam cold hearth furnace smelting (abbreviated as EB) technology can not only eliminate high-density and low-density inclusions, but also recover a large amount ...

Claims

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Application Information

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IPC IPC(8): C22B9/22C22C1/03C22C14/00
CPCC22B9/228C22C1/03C22C14/00
Inventor 周武赵统福杜彬陈生李明
Owner QINGHAI JUNENG TITANIUM IND CO LTD
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