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Novel preparation process of BT22 titanium alloy

A preparation process, titanium alloy technology, applied in the field of new preparation process of BT22 titanium alloy, can solve the problems of parts scrapping, cracking, economic loss, etc., and achieve the effect of low cost, low process requirements and low economic risk

Active Publication Date: 2021-07-16
QINGHAI JUNENG TITANIUM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the size of the structure becomes larger, the amount of deformation presents an amazing amplification effect at the edge of the part; if the strength of the part is not enough to restrain the internal stress, cracking will also occur, and in severe cases, the part will be scrapped and cause huge economic losses

Method used

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  • Novel preparation process of BT22 titanium alloy
  • Novel preparation process of BT22 titanium alloy
  • Novel preparation process of BT22 titanium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A novel preparation process for a BT22 titanium alloy, comprising the steps of:

[0054] Step 1: Raw material ingredients:

[0055] The percentages of metal materials required for raw material batching are: sponge titanium 81wt%, aluminum bean 0.9wt%, AlMo70 master alloy 7.65wt%, AlV55 master alloy 8.15wt%, metal chromium 1.4wt% and iron nail 0.9wt%; Take a total of 780kg of raw materials and store them separately;

[0056] Step 2: Mixing and pressing into blocks:

[0057] Add the titanium sponge, AlMo70 master alloy, AlV55 master alloy, metal chromium, iron nails and aluminum beans mentioned in step 1 into the silo of the automatic compounding equipment, after automatic weighing, press in an 80MN hydraulic press to form Material block (titanium lump);

[0058] Step 3: Cloth, Drying:

[0059] Put the block (titanium lump) pressed in step 2 according to 2 pieces in each row, put it into the drying material box in a single layer, and dry the block (titanium lump);

...

Embodiment 2

[0087] A novel preparation process for a BT22 titanium alloy, comprising the steps of:

[0088] Step 1: Raw material ingredients:

[0089] The percentage of metal materials required for raw material batching is: 83wt% of titanium sponge, 0.5wt% of aluminum bean, 6.6wt% of AlMo70 master alloy, 8.05wt% of AlV55 master alloy, 1.2wt% of metal chromium and 0.65wt% of iron nail; Take a total of 780kg of raw materials and store them separately;

[0090] Step 2: Mixing and pressing into blocks:

[0091] Add the titanium sponge, AlMo70 master alloy, AlV55 master alloy, metal chromium, iron nails and aluminum beans mentioned in step 1 into the silo of the automatic compounding equipment, after automatic weighing, press in an 80MN hydraulic press to form Material block (titanium lump);

[0092] Step 3: Cloth, Drying:

[0093] Put the block (titanium lump) pressed in step 2 according to 2 pieces in each row, put it into the drying material box in a single layer, and dry the block (tit...

Embodiment 3

[0121] A novel preparation process for a BT22 titanium alloy, comprising the steps of:

[0122] Step 1: Raw material ingredients:

[0123] The percentages of metal materials required for raw material batching are: 82wt% of titanium sponge, 0.6wt% of aluminum beans, 7.2wt% of AlMo70 master alloy, 8.08wt% of AlV55 master alloy, 1.3wt% of metal chromium and 0.82wt% of iron nails; Take a total of 780kg of raw materials and store them separately;

[0124] Step 2: Mixing and pressing into blocks:

[0125] Add the titanium sponge, AlMo70 master alloy, AlV55 master alloy, metal chromium, iron nails and aluminum beans mentioned in step 1 into the silo of the automatic compounding equipment, after automatic weighing, press in an 80MN hydraulic press to form Material block (titanium lump);

[0126] Step 3: Cloth, Drying:

[0127] Put the block (titanium lump) pressed in step 2 according to 2 pieces in each row, put it into the drying material box in a single layer, and dry the block ...

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Abstract

The invention discloses a novel preparation process of a BT22 titanium alloy. The novel preparation process comprises the following steps of: step 1, preparing raw materials; step 2, mixing the materials and pressing the materials into blocks; step 3, distributing the materials and drying; step 4, smelting by an electron beam cold bed (EB) furnace: sequentially stacking the material blocks (titanium lumps) dried in the step 3 into a feeder and conveying the material blocks into the electron beam cold bed furnace for smelting; carrying out primary smelting to obtain a BT22 titanium alloy cast ingot; and step 5, carrying out vacuum arc remelting (VAR) on the BT22 titanium alloy cast ingot smelted by the electron beam cold bed furnace in the step 4, and taking out the smelted cast ingot from a VAR furnace and carrying out cast ingot quality inspection. Compared with a traditional process of carrying out VAR smelting for a plurality of times, the process disclosed by the invention can be used for effectively removing high-density and low-density impurities in the raw materials and ensuring the quality of the cast ingot; compared with an electron beam fuse wire technology process, the preparation process is simple, the process requirements are relatively low, the cost is low and the economic risks are low.

Description

technical field [0001] The invention relates to the field of titanium alloy preparation technology, in particular to a novel preparation process of BT22 titanium alloy. Background technique [0002] At present, there are two main methods of producing BT22 titanium alloy: one is to use the traditional vacuum consumable arc (VAR) furnace for multiple smelting, and the process is to combine sponge titanium, aluminum vanadium alloy, aluminum molybdenum alloy, metal chromium , iron nails (or aluminum-vanadium-iron alloy) and other raw materials are mixed evenly in a certain proportion, and then pressed into an electrode block of a certain specification with a hydraulic press, welded into a "round bar" consumable electrode, and then vacuum smelted into a BT22 titanium alloy in a VAR furnace Round ingot (generally after 2-3 times of repeated melting). During the VAR smelting process, the consumable electrode drips to the bottom of the crucible after being melted by the arc, and gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22B9/04C22B9/22C22B9/20C22C14/00
CPCC22C1/03C22B9/04C22B9/228C22B9/20C22C14/00
Inventor 杜彬雷云清张志斌王龙王军田成良王倩张炜华
Owner QINGHAI JUNENG TITANIUM IND CO LTD
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