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Straightening annealing method for titanium and titanium alloy plates

A technology for titanium alloys and plates, applied in the field of preparation of titanium and titanium alloy plates, can solve the problems of difficult removal, long annealing time, and inability to meet the requirements of high flatness of plates, and achieves the effect of reducing the force-bearing area

Active Publication Date: 2012-12-05
WESTERN TITANIUM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] After creep correction, surface oxidation will occur, and due to the long annealing time, the oxide skin is relatively dense and difficult to remove, while the traditional leveling annealing pressure correction method cannot meet the requirements of high flatness of the plate

Method used

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  • Straightening annealing method for titanium and titanium alloy plates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Step 1, such as figure 1 As shown, a pure titanium backing plate 1 with a thickness of 12mm and an unevenness not greater than 3mm / m is placed on the tray of a 3m vacuum annealing furnace, and then 50 TA2 plates 2 to be processed are neatly stacked in the center of the backing plate 1 ; The size specification of the plate 2 is 0.6mm×600mm×1000mm;

[0031] Step 2. Place a pure titanium isolation pad 3 with an unevenness not greater than 3mm / m and a size of 1.0mm×700mm×1100mm on the uppermost plate, and then spread 240 ordinary carbon steel briquettes 4 on the isolation pad On the plate 3 and make the tiled area of ​​the pressing block 4 completely cover the plate 2 to be processed, the size of the pressing block 4 is 10mm×50mm×50mm, the height tolerance of the pressing block 4 is not more than 1mm, and the edges of the pressing block 4 are smooth ;

[0032] Step 3: Place the counterweight pressing plate 5 with a weight of 2102 kg on the pressing block 4 described in st...

Embodiment 2

[0039] Step 1, such as figure 1 As shown, place a pure titanium backing plate 1 with a thickness of 70mm and an unevenness not greater than 3mm / m on the tray of a 3m vacuum annealing furnace, and then neatly stack 20 TC4 plates 2 to be processed on the center of the backing plate 1 ; The size specification of the plate 2 is 1.0mm×1336mm×2418mm;

[0040] Step 2. Place a pure titanium isolation backing plate 3 with an unevenness not greater than 3mm / m and a size of 1.0mm×1400mm×2500mm on the uppermost plate, and then place 334 ordinary carbon steel briquetting blocks weighing 5kg in 4 levels Lay on the isolation pad 3 and make the tiled area of ​​the pressing block 4 completely cover the plate 2 to be processed. The size of the pressing block 4 is 60mm×100mm×100mm, and the height tolerance of the pressing block 4 is not greater than 1mm. 4 smooth edges;

[0041] Step 3: Place the counterweight pressing plate 5 with a weight of 3230kg on the pressing block 4 mentioned in step 2...

Embodiment 3

[0048] Step 1, such as figure 1 As shown, a pure titanium backing plate 1 with a thickness of 70 mm and an unevenness not greater than 3 mm / m is placed on the tray of a 3 m vacuum annealing furnace, and then 30 TA1 plates 2 to be processed are neatly stacked in the center of the backing plate 1 ; The size specification of the plate 2 is 1.0mm×800mm×2000mm;

[0049] Step 2. Place a pure titanium isolation pad 3 with an unevenness not greater than 3mm / m and a size of 1.0mm×850mm×2100mm on the uppermost plate, and then spread 250 ordinary carbon steel briquettes 4 on the isolation pad On the plate 3 and make the flat area of ​​the pressing block 4 completely cover the plate 2 to be processed, the size of the pressing block 4 is 100mm×80mm×80mm, the height tolerance of the pressing block 4 is not more than 1mm, and the edges of the pressing block 4 are smooth ;

[0050] Step 3: Place the counterweight pressing plate 5 with a weight of 2821 kg on the pressing block 4 described in...

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Abstract

The invention discloses a straightening annealing method for titanium and titanium alloy plates. The method comprises the following steps of: 1, placing a base plate on a material disk of a vacuum annealing furnace and tidily stacking the plates to be processed on the base plate; 2, placing an isolating base plate on the uppermost layer of plate and flatly paving a plurality of pressing blocks onthe isolating base plate; 3, placing a counterweight pressing plate on the pressing blocks and placing metal supporting objects in the space between the periphery of the counterweight pressing plate and the base plate; and 4, cleaning the material disk of the vacuum annealing furnace, pushing the material disk into the vacuum annealing furnace and performing annealing treatment according to a designed annealing process curve. The pressing blocks are adopted in the annealing straightening process and the plate shape of some region in the original plate is not good in the high-temperature annealing process, so the action force of the counterweight pressing plate is concentrated on the pressing block in the region until the plate shape defect in the region is eliminated; and then another rough region is processed and the like, until the whole straightness of the annealing plate is consistent.

Description

technical field [0001] The invention belongs to the technical field of preparation of titanium and titanium alloy plates, and in particular relates to a shape-correcting annealing method for titanium and titanium alloy plates. Background technique [0002] With the development of industrial technologies such as aviation, aerospace and shipbuilding, the requirements for wide-width thin plates of titanium and titanium alloys are increasing, and the requirements for roughness of the plates are also getting higher and higher. At present, there are mainly three kinds of shape annealing methods for titanium and titanium alloy thin plates commonly used in China: 1) shape adjustment treatment in vacuum annealing furnace → inspection and delivery; 2) shape annealing in atmospheric annealing furnace → alkali pickling → inspection and delivery; 3 ) Creep annealing → alkali pickling → inspection and delivery. The shape correction treatment effect of vacuum annealing furnace is greatly ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/18
Inventor 戴毅吕利强侯高洁吴晓东叶红川王军刚邢义胜安文斌弥鸣尹娟李信王鲁平张晓卫张清李辉王兴王蕊宁舒滢曲恒磊杨建朝
Owner WESTERN TITANIUM TECH
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