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Preparation method for large titanium-nickel alloy ingots

A titanium-nickel alloy, large-scale technology, which is applied in the field of preparation of large atomic ratio titanium-nickel alloy ingots, can solve problems affecting the success or failure of titanium-nickel alloy ingots, and achieve accuracy and uniformity, uniform alloy composition, and low impurity content Effect

Active Publication Date: 2017-10-13
西安赛特思迈钛业有限公司
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Problems solved by technology

However, for titanium-nickel alloys, the shape of raw materials, the way of electrode block distribution, and the melting process will all affect the success or failure of vacuum self-consumption smelting to obtain large-scale equiatomic titanium-nickel ingots with uniform composition and cleanness.

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  • Preparation method for large titanium-nickel alloy ingots

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preparation example Construction

[0027] The preparation method specifically comprises the following steps:

[0028] Step 1. According to the ratio of titanium-nickel alloy and the number of auxiliary brackets to divide the mold cavity, use 3-12.7mm sponge titanium and square block electrolytic nickel as raw materials, according to the composition ratio of the titanium-nickel alloy to be prepared, carry out Weigh and batch the ingredients to obtain N parts of mixed raw materials, and the number of parts of mixed raw materials is the same as the number of blocks.

[0029] The raw materials for preparing titanium-nickel alloy are mainly sponge titanium and electrolytic nickel. The shapes of granular sponge titanium and large electrolytic nickel plates are quite different, and it is difficult to realize the cloth and pressing of electrode blocks. Therefore, the selection and preparation of raw materials is the primary key work. The square block electrolytic nickel is prepared by the following method: the electro...

Embodiment 1

[0035] Embodiment 1 The Φ460-800Kg ingot smelting method of TiNi50.8 (Ti-Ni50.8at%) alloy: the electrolytic nickel plate is rolled into a 6-8mm thick plate in advance, and punched into a square block with a side length of 8-10mm , cleaned and dried for later use. Sponge titanium uses small particles of 3-12.7mm. The grade of raw materials is 0 grade sponge titanium, Ni9999 electrolytic nickel.

[0036] According to the ratio of Ti-Ni50.8at% (Ti-Ni55.86wt%), press the Φ160-20Kg electrode block. The auxiliary bracket divides the mold cavity into four equal parts, each part is 5Kg. Weighing sponge titanium 2.207Kg, electrolytic nickel 2.793Kg. Mix by hand and pour into the griddle. Repeat the operation 4 times to complete the charging. After taking out the auxiliary bracket, uniformly vertically press it into a Φ160-20Kg electrode block. The electrode block is about 310mm high, and the selected equipment is a 2000T hydraulic press.

[0037] Weld 5 electrode blocks into a c...

Embodiment 2

[0041]Example 2 TiNiV (Ti-Ni50.8-V0.5at%) alloy Φ460-960Kg ingot smelting method: the electrolytic nickel plate is rolled into a 6-8mm thick plate in advance, and punched into a square with a side length of 8-10mm Block material, cleaned and dried for later use. Sponge titanium uses small particles of 3-12.7mm. The grade of raw materials is 0 grade sponge titanium, Ni9999 electrolytic nickel, AlV85 alloy.

[0042] According to the ratio of TiNiV (Ti-Ni55.85-V0.47wt%), press the Φ160-16Kg electrode block. The auxiliary bracket divides the mold cavity into four equal parts, each part is 4Kg. Weighing sponge titanium 1.744Kg, electrolytic nickel 2.234Kg, AlV85 alloy 0.022Kg. Sponge titanium and electrolytic nickel are artificially mixed and poured into the grid twice, and AlV85 alloy is placed in the middle. Repeat the operation 4 times to complete the charging. After the bracket is taken out, it is unified and vertically pressed into a Φ160-16Kg electrode block. The electr...

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Abstract

The invention discloses a preparation method for large titanium-nickel alloy ingots. According to the method, a mold cavity is used, and a detachable auxiliary support is placed in the mold cavity and is used for dividing the inner space of the mold cavity into N grids which are horizontally arranged; 3-12.7 mm sponge titanium and square blocky electrolytic nickel are used as raw materials and are proportioned according to the composition proportion of titanium-nickel alloy to be prepared so as to obtain N parts of mixed raw materials; and each part of the mixed raw materials is poured into the corresponding grid; the auxiliary support is taken out from the mold cavity; electrode blocks for smelting the titanium-nickel alloy is formed by one-time vertical pressing; and the above steps are repeated to obtain a plurality of electrode blocks for smelting the titanium-nickel alloy, the electrode blocks are assembled and welded to form consumable electrodes, and then the consumable electrodes undergo vacuum smelting to obtain the large titanium-nickel alloy ingots. According to the method, the large titanium-nickel alloy ingots with equal atomic ratios, uniform alloy components and low impurity content can be produced.

Description

【Technical field】 [0001] The invention belongs to the technical field of titanium-nickel alloy smelting, in particular to a method for preparing a large ingot of titanium-nickel alloy with equiatomic ratio. 【Background technique】 [0002] Titanium-nickel-based shape memory alloy is a new type of metal functional material that emerged in the 1960s with three characteristics: shape memory, superelasticity and high damping. It also has excellent biocompatibility. It has been used in electronics, machinery , aerospace, energy, medical care and daily necessities and other fields. [0003] The main technical properties of equiatomic ratio Ti-Ni alloy materials are superelasticity and shape memory effect, including parameters such as alloy phase transition point, recovery stress and recovery rate, and chemical composition is the most sensitive factor affecting alloy properties. For Ti-Ni alloys with equiatomic ratios, when the Ni content changes by 0.1 at%, the phase transition po...

Claims

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Application Information

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IPC IPC(8): C22C19/03C22C14/00C22C1/02
CPCC22C1/02C22C1/023C22C14/00C22C19/03
Inventor 毛江虹牛中杰杨晓康胡琦薛飒贾兵然
Owner 西安赛特思迈钛业有限公司
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