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Forging machining method for super-large titanium alloy forging stock

A technology with super-large specifications and processing methods, which is applied in the field of titanium alloy forging, can solve problems such as anisotropy of mechanical properties, large size, and uneven structure, so as to consolidate the uniformity and consistency of the structure, reduce the residual stress difference, increase the The effect of heart forging

Pending Publication Date: 2022-03-15
湖南湘投金天钛业科技股份有限公司
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Problems solved by technology

In the production process of super-large forging blanks of titanium alloy, in order to ensure the uniformity of the structure of super-large forging blanks, it is usually necessary to carry out multi-fire forging in large-scale equipment. However, due to the large size of super-large forging blanks, the final forging cannot be guaranteed during the forging process. temperature, usually prone to tissue inhomogeneity
In addition, due to the large size of the billet, it is easy to forge impermeable phenomenon when the equipment capacity is insufficient, which is especially easy to cause problems such as uneven structure of the edge and center, anisotropy of mechanical properties, etc., so that it cannot meet the final use requirements.

Method used

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  • Forging machining method for super-large titanium alloy forging stock
  • Forging machining method for super-large titanium alloy forging stock
  • Forging machining method for super-large titanium alloy forging stock

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Embodiment 1 (200*1800*3500mm specification forging billet forging method)

[0029] Choose TC4 titanium alloy Φ880mm specification ingot casting, ingot β transformation temperature T β is 1000°C.

[0030] Step 1: Heat the TC4 ingot to 1150°C for heat preservation, and the heat preservation coefficient in this step is 0.7~0.75min / mm.

[0031] Step 2: Carry out blank forging for the ingot processed in step 1. The forging method is to forge the Φ880mm ingot with 2 upsetting and 2 drawing in the first fire to a square □900mm, and use air cooling after forging; the accumulated in this step The total deformation is not less than 80%, and the final forging temperature is not lower than 850°C.

[0032] Step 3: heat and keep the blank obtained in step 2 at 1080°C, and the heat preservation coefficient in this step is 0.7~0.75min / mm.

[0033] Step 4: Carry out 2 upsetting and 2 drawing of the ingot processed in step 3, and forge it to a flat square size of □800×1000×L mm, wher...

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Abstract

The invention relates to the technical field of titanium alloy forging, in particular to an oversized titanium alloy forging stock forging machining method which is achieved through the steps of cogging forging, homogenizing forging, forging below T beta, finished product forging and the like. By the adoption of the forging method, batch production of the ultra-large TC4 titanium alloy forging stock with the single weight being 3000-5000 kg can be achieved on a high-speed forging machine, the total forging heating number of the forging stock is 8-10, the machining cost is reduced by about 17% compared with 14-16 times of forging of a traditional titanium alloy forging stock, the comprehensive yield is increased by about 7%, and the forging method is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy forging, and in particular relates to a forging processing method for a super-large-sized titanium alloy forging billet. Background technique [0002] With the development of new equipment towards large-scale and technological development, the forging billet of titanium alloy is also developing towards large-scale and super-large. For ultra-large titanium alloy forging blanks with a single weight of more than 5 tons, the uniformity of the structure is always a huge problem. In the production process of super-large forging blanks of titanium alloy, in order to ensure the uniformity of the structure of super-large forging blanks, it is usually necessary to carry out multi-fire forging in large-scale equipment. However, due to the large size of super-large forging blanks, the final forging cannot be guaranteed during the forging process. Temperature, usually prone to tissue inhomogeneity. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/00B21J5/06C22F1/18
CPCB21J5/00B21J5/06C22F1/183
Inventor 朱鸿昌陈艳樊凯邹金佃李超
Owner 湖南湘投金天钛业科技股份有限公司
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