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
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[0069] Example 1 Pressing of material block 1#~5# and comparative sample block D1#-D2#
[0070] The raw materials containing titanium, nickel and molybdenum are mixed to form the same accurate quality raw material block, the raw material block is pressed into a specific size material block, and dried. The composition and preparation conditions of the materials of block 1#~5# are shown in Table 1.
[0071] Table 1
[0072]
[0073] Take material block 1# as a typical representative to illustrate the preparation method of material block, the preparation process is as follows:
[0074] a. The total weight of titanium sponge (grade 0) and Ni-Mo master alloy is 640Kg. After mixing, all materials are compressed into raw material blocks with a weight of 20Kg / block (including titanium sponge 19.77kg and master alloy 0.23kg), totaling 32 yuan;
[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 measureme...
Example Embodiment
[0078] Example 2 Feeding method of material block 1#~5# and comparative sample block D1#~D2#
[0079] Put the prepared material blocks 1#~5# and the comparative sample blocks D1#~2# into the feeder 3 of the electron beam cooling bed smelting furnace as shown in Table 2 to melt TA10 titanium alloy. Block 1# is a typical representative to explain the stacking rules of material blocks, the stacking requirements are:
[0080] a. Overall requirements for stacking
[0081] The stacking rules on the left: 4 blocks per row, single-layered, a total of 16 alloy blocks, a total of 4 rows;
[0082] The stacking rules on the right: 4 blocks in each row, single-layered, a total of 16 alloy blocks, a total of 4 rows.
[0083] b. The specific stacking position is shown in Table 2: (A represents the feed block in the lance and ingot bottom making stage, B represents the feed block in the stable smelting stage)
[0084] Table 2
[0085]
[0086]
Example Embodiment
[0087] Example 3 Preparation of casting ingots 1#~5# and comparative ingots D1#~D2#
[0088] The material blocks 1#~5# prepared in Example 1 and the comparative sample blocks D1#~2# were placed in the feeder according to the stacking rules of Example 2, and were smelted in the electron beam cooling bed furnace through the following steps to prepare castings. The ingots are marked as casting ingots 1#~5# and comparative ingots D1#~D2#. The smelting process of the electron beam cooling bed furnace includes the following stages:
[0089] (1) Start the electron gun stage
[0090] Gun-opening stage: heating the condensing shell without melting it, and observe the vacuum change in the furnace. During the oven drying period, the current range of 1~5# gun should be strictly controlled to be no more than 5.0A; at the same time, the current range of 6~7# gun should be started to be no more than 2.0A to preheat the bottom support. After confirming that all the electron guns are in no abnormal...
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