A kind of preparation method of ti6al7nb titanium alloy ingot

A titanium alloy and ingot casting technology is applied in the field of preparation of Ti6Al7Nb titanium alloy ingots, which can solve the problems of substandard mechanical properties, poor ingot composition uniformity, difficulty in meeting the clinical application requirements of medical materials, etc. Partially uniform effect

Active Publication Date: 2021-09-03
西部超导材料科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, since the segregation-prone alloying element Nb content in Ti6Al7Nb alloy is as high as 7%, the Nb element is easy to segregate in the ingot by adopting a melting process similar to other conventional titanium alloys, which not only makes the composition uniformity of the ingot worse, but also causes The results of poor tissue uniformity and substandard mechanical properties make it difficult to meet the clinical application requirements of medical materials

Method used

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  • A kind of preparation method of ti6al7nb titanium alloy ingot
  • A kind of preparation method of ti6al7nb titanium alloy ingot
  • A kind of preparation method of ti6al7nb titanium alloy ingot

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Embodiment 1

[0027] The invention provides a method for preparing a Ti6Al7Nb titanium alloy ingot, which is suitable for melting and preparing a Ti6Al7Nb titanium alloy ingot with a specification of Φ560-Φ720 mm, and specifically includes the following steps:

[0028] (1) Equipped with raw materials, select sponge titanium, AlNbTi alloy, Al beans and TiO 2 As a batching raw material, the batching is completed according to the ratio required by GB / T3620.1;

[0029] (2) mixing and pressing into an electrode block;

[0030] (3) Assembling and welding the electrode blocks in step (2) to obtain consumable electrodes;

[0031] (4) Carry out vacuum arc melting three times to the consumable electrode of step (3), and the melting process is controlled at vacuum degree 5.0Pa

[0032] Below, the smelting current is 30-40KA, the smelting voltage is 30-40V, and the cooling time after smelting is not less than 5 hours. The third vacuum consumable arc smelting adopts the melting speed control, and ente...

Embodiment 2

[0047] The present invention also provides a method for preparing a Ti6Al7Nb titanium alloy ingot, which is suitable for melting and preparing a Ti6Al7Nb titanium alloy ingot with a specification of Φ560-Φ720 mm, and specifically includes the following steps:

[0048] (1) Equipped with raw materials: the national standard sponge titanium, AlNbTi alloy, Al beans and TiO 2According to the proportion of Ti-6Al-7Nb-0.11O, the total weight of ingredients is 5500kg;

[0049] (2) Mixing materials and pressing them into electrode blocks: fully mix the raw materials prepared in step (1) evenly to complete the mixing, and use an 8000-ton hydraulic press to press them into electrode blocks with a pressing pressure of 35 MPa;

[0050] (3) vacuum plasma welding is carried out to the electrode block obtained in step 2 to obtain a consumable electrode;

[0051] (4) Carry out vacuum arc melting three times to the consumable electrode of step (3), specifically:

[0052] For the first vacuum ...

Embodiment 3

[0064] The present invention also provides a method for preparing a Ti6Al7Nb titanium alloy ingot, which is suitable for melting and preparing a Ti6Al7Nb titanium alloy ingot with a specification of Φ560-Φ720 mm, and specifically includes the following steps:

[0065] (1) Equipped with raw materials: the national standard sponge titanium, AlNbTi alloy, Al beans and TiO 2 According to the proportion of Ti-6Al-7Nb-0.11O, the total weight of ingredients is 5000kg;

[0066] (2) Mix the materials and press them into electrode blocks: fully mix the raw materials prepared in step (1) evenly to complete the mixing, and use an 8000-ton hydraulic press to press them into electrode blocks, and the pressing pressure is 32MPa;

[0067] (3) vacuum plasma welding is carried out to the electrode block obtained in step 2 to obtain a consumable electrode;

[0068] (4) Carry out vacuum arc melting three times to the consumable electrode of step (3), specifically:

[0069] For the first vacuum ...

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Abstract

The invention belongs to the technical field of non-ferrous metal processing, and discloses a method for preparing Ti6Al7Nb titanium alloy ingots, which is suitable for smelting and preparing Ti6Al7Nb titanium alloy ingots with specifications of Φ560-Φ720 mm. The method includes: first, sponge titanium, AlNbTi alloy, Al beans and TiO 2 Dosing according to the ratio required by GB / T3620.1; mix uniformly and press into electrode blocks, vacuum plasma weld the electrode blocks to prepare consumable electrodes; then carry out three vacuum consumable arc melting on the consumable electrodes , the last smelting adopts the melting speed control, and enters the feeding stage in the later stage, and the melting rate decreases step by step. When the reserved weight of the consumable electrode is 30-60kg and the melting speed is 0kg / min, a current of 4-6kA is maintained at 40 ~100min, gradually reduce the depth of the molten pool; after cooling, perform surface machining to obtain finished ingots.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal processing, and in particular relates to a method for preparing a Ti6Al7Nb titanium alloy ingot. Background technique [0002] As metal materials for human implants, in addition to good mechanical properties and corrosion resistance, they should also have good biocompatibility; widely used metal materials for surgical implants include stainless steel, cobalt-based alloys and titanium alloys. kind. [0003] At present, Ti6Al7Nb titanium alloy has gradually replaced pure titanium and Ti6Al4V alloy due to its high elastic modulus, good processability, and excellent biocompatibility, and has been applied in the field of surgical implants. [0004] However, since the segregation-prone alloying element Nb content in Ti6Al7Nb alloy is as high as 7%, the Nb element is easy to segregate in the ingot by adopting a melting process similar to other conventional titanium alloys, which not only makes ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/03C22C14/00
CPCC22C1/03C22C14/00
Inventor 华正利付杰曹国鑫罗文忠王凯旋张丰收刘向宏冯勇
Owner 西部超导材料科技股份有限公司
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