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A kind of coil type production method of titanium-palladium alloy

A production method, palladium alloy technology, applied in the field of coil production of titanium palladium alloy, can solve the problems of uneven composition of ingots, low production efficiency, small batches, etc., and achieve good appearance quality, high production efficiency and low cost Effect

Active Publication Date: 2017-11-03
LUOYANG SUNRUI TI PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The physical and mechanical properties of TA8 / TA8-1 are close to TA1, and the physical and mechanical properties of TA9 / TA9-1 are close to TA2. These alloys are produced by hot-rolled single-sheet, and the thin plates are cold-rolled single-sheet. Production by means of low production efficiency, small batches and high cost
Because palladium is a high-density element, it is easy to cause uneven composition of ingots during smelting, and there are great risks and some technical problems in the production of large slab coils. There is no report of continuous production by coil cold rolling in China.

Method used

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  • A kind of coil type production method of titanium-palladium alloy
  • A kind of coil type production method of titanium-palladium alloy
  • A kind of coil type production method of titanium-palladium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Select grade 0 sponge titanium with a particle size of 3~12.7mm, select and remove the particles with obvious abnormal appearance, use cloth equipment to spread the sponge titanium in layers, sprinkle pure Pd powder (purity greater than 99.95%) evenly on it, and then press and weld the electrodes; The German ALD vacuum consumable electric arc furnace was used for secondary melting to prepare TA8-1 alloy. The Pd content of the slab was 0.06-0.08% and the O content was 0.05-0.06%. The composition was qualified and there was no obvious segregation of Pd element. After forging, shaping and face milling, a qualified TA8-1 slab with a flaw detection level reaching Class A was obtained. The nominal size of the slab was 180×1050×6000mm and the weight was 5.1t.

[0030] After heating with natural gas and holding at 880±20°C, rough rolling and finish rolling are used to prepare 4.5mm thick TA8-1 hot-rolled titanium coils, followed by annealing at 730°C±20°C, shot blasting, descali...

Embodiment 2

[0036] The same method as in Example 1 was used to prepare TA8 slab, forge and prepare 4.5mm hot-rolled coils, annealed and pickled, and the slab had a Pd content of 0.05-0.08% and an O content of 0.05-0.065%.

[0037] After grinding the surface of the hot-rolled coil, perform multi-pass cold rolling, the rolling deformation rate is about 54%, and the pass deformation rate is ≤12%, to obtain a 2mm thick cold-rolled titanium coil; after rolling, degrease to remove rolling oil, and then Annealing is carried out in a vacuum bell furnace, the annealing temperature is 650°C, and the holding time is about 8h. After annealing, cool to below 200°C, and air-cool after taking out the furnace; after cooling to room temperature, temper rolling with a deformation of ≤1.5% can be carried out to improve the shape of the plate and reduce unevenness; then use a leveler to straighten, and then cut into 2×1000×2000mm finished plates, the unevenness can reach ≤5mm / m.

[0038] Cut a small amount ...

Embodiment 3

[0045] A method similar to that of Example 1 was used to prepare TA9 ingots, smelt three times, forge and prepare 5mm hot-rolled coils, annealed and pickled, and the Pd content of the slab was 0.15-0.23%, and the O content was 0.05-0.07%.

[0046] After grinding the surface of the hot-rolled coil, perform multi-pass cold rolling, the rolling deformation rate is about 40%, and the pass deformation rate is ≤10%, to obtain a 3mm thick cold-rolled titanium coil; after rolling, degrease to remove rolling oil, and then Cut into 3 × 1000 × 2000mm plates, 25 sheets into a stack, press 50mm steel plates for 650 ° C orthopedic annealing, and then perform sandblasting + pickling treatment, the unevenness of titanium plates can reach ≤ 5mm / m.

[0047] The performance and structure of the 3mm thick TA9 plate in the atmospheric annealed state are shown in Table 3.

[0048] Table 3 Properties and structure of 3mm thick TA9 plate (transverse direction)

[0049]

[0050] The elongation tes...

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Abstract

The invention relates to a roll-type production method of titanium-palladium alloy. Good hot-rolled coils are obtained by smelting qualified ingots, hot rolling and annealing and pickling, and the roll-type cold rolling method is used to produce titanium-palladium alloys to make corrosion-resistant titanium-palladium alloys. The production efficiency is higher, the quality is better, and the cost is lower; the composition of the obtained product is qualified, the production efficiency is high, the product appearance and shape are good, the composition of the slab is qualified, the fluctuation of alloy elements is small, and the weight of a single coil is not less than 4t , It can produce corrosion-resistant titanium-palladium alloy plates or coils with a thickness range of 0.5~3mm, and the finished titanium product width can be ≥900mm, with large rolling deformation, high production efficiency, good appearance quality, and low cost. The whole plate (thickness × 1000×2000mm) unevenness can be achieved ≤5mm / m.

Description

technical field [0001] The invention relates to the technical field of production of titanium-palladium-titanium materials, in particular to a roll-type production method of titanium-palladium alloy. Background technique [0002] Industrial pure titanium has the advantages of high specific strength and good corrosion resistance. It has good corrosion resistance in seawater and oxidizing acid media, but it has poor corrosion resistance in reducing media such as hydrochloric acid and sulfuric acid, and is prone to active dissolution. , and significant corrosion occurred. After adding a low content of palladium (Pd) to commercially pure titanium, it not only has excellent corrosion resistance in oxidizing media, but also significantly improves the corrosion resistance of titanium in reducing media, and has greater resistance to crevice corrosion. Titanium-palladium alloy also has the characteristics of low hydrogen absorption capacity and is not easy to produce hydrogen embrit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/18C22C14/00C22C1/02C22F1/02
CPCC22C1/02C22C14/00C22F1/02C22F1/183
Inventor 刘喜波陈令杰刘茵琪
Owner LUOYANG SUNRUI TI PRECISION CASTING
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