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Cold-cathode eb furnace smelting method for non-forging direct rolling ti-al-nb-zr-mo alloy ingot

A technology of alloy ingot and cold cathode, which is applied in the field of non-ferrous metal processing, can solve the problems that limit the large-scale application of TA31 alloy, the difficulty of removing high and low density impurities, and the high cost of materials, etc., and achieve obvious market application prospects, high and low Less dense inclusions and reduced production costs

Active Publication Date: 2022-02-15
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because VAR smelting TA31 alloy has problems such as difficult removal of high and low density impurities, uneven composition and structure, and the need for multiple remelting, the ingot must be forged, billeted, and then rolled into a material in subsequent processing. Not only the process flow long, and the comprehensive yield is low, resulting in the high cost of processed materials, which greatly limits the large-scale application of TA31 alloy

Method used

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  • Cold-cathode eb furnace smelting method for non-forging direct rolling ti-al-nb-zr-mo alloy ingot
  • Cold-cathode eb furnace smelting method for non-forging direct rolling ti-al-nb-zr-mo alloy ingot
  • Cold-cathode eb furnace smelting method for non-forging direct rolling ti-al-nb-zr-mo alloy ingot

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The cold cathode EB furnace smelting method of free-forging direct rolling Ti-Al-Nb-Zr-Mo alloy ingot comprises the following steps:

[0036] (1) Dosing ingredients according to the following mass ratio:

[0037] Aluminum niobium alloy 6.3wt.%

[0038] Aluminum beans 4.05wt.%

[0039] Zirconium sponge 1.5wt.%

[0040] Aluminum molybdenum alloy 1.5wt.%

[0041] Sponge titanium 86.65wt.%;

[0042] Among them: the particle size of aluminum-niobium alloy is 1-10mm, and the content of aluminum is 47wt.%, and the content of Nb is 53wt.%.

[0043] The content of Al in aluminum beans is ≥99.9wt.%;

[0044] The particle size of zirconium sponge is 3-10mm, and the Zr content is ≥99.4wt.%.

[0045] The particle size of aluminum-molybdenum alloy is 1-3mm, and the content of Al is 35wt.%, and the content of Mo is 65wt.%.

[0046] (2) After mixing the prepared materials in step (1), take an appropriate amount of mixed material as bulk material, press the rest of the mixed mate...

Embodiment 2

[0054] The cold cathode EB furnace smelting method of free-forging direct rolling Ti-Al-Nb-Zr-Mo alloy ingot comprises the following steps:

[0055] (1) Dosing ingredients according to the following mass ratio:

[0056] Aluminum niobium alloy 6.0wt.%

[0057] Aluminum beans 4.45wt.%

[0058] Zirconium sponge 2.0wt.%

[0059] Aluminum molybdenum alloy 1.6wt.%

[0060] Sponge titanium 85.95wt.%;

[0061] Among them: the particle size of aluminum-niobium alloy is 1-10mm, and the content of aluminum is 47wt.%, and the content of Nb is 53wt.%.

[0062] The content of Al in aluminum beans is ≥99.9wt.%;

[0063] The particle size of zirconium sponge is 3-10mm, and the Zr content is ≥99.4wt.%.

[0064] The particle size of aluminum-molybdenum alloy is 1-3mm, and the content of Al is 35wt.%, and the content of Mo is 65wt.%.

[0065] (2) After mixing the prepared materials in step (1), take an appropriate amount of mixed material as bulk material, press the rest of the mixed mate...

Embodiment 3

[0073] The cold cathode EB furnace smelting method of free-forging direct rolling Ti-Al-Nb-Zr-Mo alloy ingot comprises the following steps:

[0074] (1) Dosing ingredients according to the following mass ratio:

[0075] Aluminum niobium alloy 5.7wt.%

[0076] Aluminum beans 4.77wt.%

[0077] Zirconium sponge 2.5wt.%

[0078] Aluminum molybdenum alloy 1.7wt.%

[0079] Sponge titanium 85.33wt.%;

[0080] Among them: the particle size of aluminum-niobium alloy is 1-10mm, and the content of aluminum is 47wt.%, and the content of Nb is 53wt.%.

[0081] The content of Al in aluminum beans is ≥99.9wt.%;

[0082] The particle size of zirconium sponge is 3-10mm, and the Zr content is ≥99.4wt.%.

[0083] The particle size of aluminum-molybdenum alloy is 1-3mm, and the content of Al is 35wt.%, and the content of Mo is 65wt.%.

[0084] (2) After mixing the prepared materials in step (1), take an appropriate amount of mixed material as bulk material, press the rest of the mixed mate...

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Abstract

The invention provides a cold-cathode EB furnace smelting method for direct-rolling Ti-Al-Nb-Zr-Mo alloy ingot without forging, which is characterized in that it comprises the following steps: 1) material preparation, 2) material mixing and briquetting, 3 ) for charging, 4) turn on electron guns 1 to 4 to vacuum melt the bulk material in the cooling bed to obtain a condensate shell, 5) push the briquetting material in the feeding area into the melting area, and turn on electron guns 1 to 7 to press Carry out vacuum smelting and ingot pulling of the block material, 6) Feed the ingot with electron guns No. 5 to 7 until the titanium alloy liquid flows into the crystallizer through the cooling bed, then stop the smelting to obtain uniform composition and structure, high and low density inclusions A Ti-Al-Nb-Zr-Mo alloy ingot with less, high purity, and direct rolling without forging. The performance of the product is better than that of the existing products, the technological process is short, the finished product rate is increased to 80%, the cost is reduced by 15% to 30%, and the effect is obvious.

Description

technical field [0001] The invention relates to a cold-cathode EB furnace melting method for direct-rolling Ti-Al-Nb-Zr-Mo alloy ingot without forging, and belongs to the technical field of nonferrous metal processing. Background technique [0002] Ti-6Al-3Nb-2Zr-1Mo (TA31) titanium alloy not only has low density, high specific strength, good plasticity and corrosion resistance, but also has excellent fracture toughness, stress corrosion fracture toughness, impact toughness and weldability, etc. , can be processed into tubes, plates, rods, profiles and other products, especially its outstanding resistance to seawater and marine atmospheric corrosion, is an ideal choice for offshore oil drilling platforms, marine engineering equipment, ships, submarines, deep submersibles and offshore facilities, etc. High-quality lightweight structural materials in the field have broad application prospects. In the field of titanium material processing, after mixing sponge titanium and allo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/03C22C14/00C22B9/22
Inventor 张玉勤邓亚杰黄海广张浩泽史亚鸣李志敏蒋业华
Owner KUNMING UNIV OF SCI & TECH