Manufacturing process for ultra-fine grain titanium alloy TC4 blade

A technology of ultra-fine grain and manufacturing process, applied in the supporting elements of blades, metal material coating process, coating and other directions, can solve the problem that depends on heating temperature and vacuum degree, it is difficult to precisely control, and it is difficult to ensure the mechanical properties of titanium alloys and other problems, to achieve the effect of lasting limit improvement

Inactive Publication Date: 2015-07-08
上海驳原金属材料有限公司
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  • Abstract
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Problems solved by technology

[0004] But the disadvantages of this technology are: 1. Injecting hydrogen into titanium alloy is a dangerous action
However, the degree of hydrogen elimination depends on the heating temperature and vacuum degree, and it is difficult to precisely control
Although this process also reduces the forging temperature, it will also cause hydrogen to remain in the forging, making it difficult to guarantee the mechanical properties of the titanium alloy.

Method used

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  • Manufacturing process for ultra-fine grain titanium alloy TC4 blade
  • Manufacturing process for ultra-fine grain titanium alloy TC4 blade
  • Manufacturing process for ultra-fine grain titanium alloy TC4 blade

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Embodiment 1

[0046] This embodiment includes the following steps:

[0047] Such as figure 1 as well as figure 2 a) As shown in 1, use D 0 =50mm, height H 0 =100mm TC4 titanium alloy bar, after intermediate frequency induction heating, put it on the model THP10-2000B forging hydraulic press, which is equipped with an isothermal die forging device, the descending speed of the beam is 1mm / s, and the deformation speed is 10 -3 / s.

[0048] The first step, according to figure 2 As shown, multiple omni-directional deformations are performed under isothermal conditions, specifically:

[0049] 1.1) If figure 2 As shown in 2-4 in a, in the y-axis direction, the total deformation degree is 50% (that is, the height of upsetting is 50mm), and each upsetting deformation is ≤5%, and the upsetting is carried out 10 times; figure 2 As shown in 4 in a, the diameter of the obtained semi-finished product High D 0 .

[0050] 1.2) If figure 2 As shown in 1-4 in b, change the y-axis to the x-a...

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Abstract

The invention relates to a manufacturing process for an ultra-fine grain titanium alloy TC4 blade. After a TC4 titanium alloy bar is subjected to medium-frequency induction heating, the TC4 titanium alloy bar is placed on a hydraulic forging press with an isothermal die forging device, a blank is obtained through times of all-direction deformation under isothermal conditions, then the head of the blank is upset and die-forged isothermally, and finally the surface of a sample is put in plasma catalyst for ion treatment to implant low-energy ionic nitrogen. By performing all-direction isothermal deformation to the blank before die forging, an ultra-fine grain structure with grain size of 0.6mum is obtained, the die forging temperature is further decreased to 700DEG C and the strength of the blade with ultra-fine grains is ensured to be improved to 1160MPa.

Description

technical field [0001] The invention relates to a method in the technical field of engine manufacturing, in particular to a manufacturing process of an ultrafine grain titanium alloy TC4 blade. Background technique [0002] Now, in order to meet the needs of the manufacture of large aircraft, regional aircraft and even fighter jets, my country plans to establish research and development of new engines for mass production. In order to realize the planning smoothly, it is necessary to ensure the production of gas turbines which are competitive in the domestic and foreign markets. The blade is one of the key parts of the gas turbine. Today's conventional die forging methods not only have high costs, but also cannot meet high requirements in terms of comprehensive performance. The present invention aims to overcome the shortage of current manufacturing technology, and manufactures blades with ultra-fine grain 100-500nm TC4 titanium alloy, which not only reduces the forging tem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/08B21J5/02C23C8/36F01D5/14F01D5/28
Inventor 吴振清
Owner 上海驳原金属材料有限公司
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