Precision rolling method for titanium alloy with excellent high-temperature characteristics
A titanium alloy, excellent technology, applied in the field of precision rolling of titanium alloys with excellent high temperature characteristics, which can solve the problems of low material utilization rate, difficult rolling and forming, and large size.
Active Publication Date: 2021-05-28
WUXI PAIKE HEAVY CASTING & FORGING
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Problems solved by technology
[0003] The outer ring of the intake casing is a large special-shaped thin-walled titanium alloy ring used on a certain type of engine. It is large in size and thin in wall thickness, making it difficult to roll and form. The material is TC2 titanium alloy, which is a difficult-to-deform material and deforms during the forging process. The resistance is relatively high. At present, the overall molding is generally used, and the subsequent machining is used to process the molding. The damage to the flow line is relatively large, and the material utilization rate is low.
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Embodiment
[0024] Embodiment: a kind of precision rolling method of titanium alloy with excellent high-temperature characteristics, such as figure 1 shown, including the following steps:
[0025] S1: Blank blanking: The staff prepares TC2 titanium alloy raw materials, the size of blanking is: φ400×603mm, and the weight is 341Kg.
[0026] S2: billet heating: the billet is heated to 960°C in a furnace, and then kept for 240 minutes. When the TC2 titanium alloy is heated above 800°C, the recrystallization of the crystal structure is basically completed, and it transforms into an equiaxed crystal structure of α phase and β phase. As the annealing temperature increases, the strength of the material decreases, and the plasticity increases. High is good for deformation. After exceeding 800°C, as the temperature rises, the crystal grains continue to grow, and at the same time, they are kept warm for a period of time to ensure that the tissue transformation is completed. Improving the plastici...
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Abstract
The invention discloses a precision rolling method for titanium alloy with excellent high-temperature characteristics, and belongs to the technical field of titanium alloy rolling. The technical scheme of the invention has the key points that the precision rolling method comprises the following steps of: S1, blank blanking; S2, blank heating; S3, punching after upsetting of a blank; S4, blank heating; S5, reaming of an inner hole of the blank; S6, blank heating; S7, pre-rolling of the blank; S8, blank heating; and S9, finishing rolling of the blank. The method has the advantages that the forging deformation amount of each working procedure is reasonably distributed, damage to a streamline is reduced, the streamline of a forged piece tends to be attached to the shape of a part, and the material utilization rate is improved.
Description
technical field [0001] The invention relates to the technical field of titanium alloy rolling, in particular to a titanium alloy precision rolling method with excellent high-temperature characteristics. Background technique [0002] Titanium alloy refers to a variety of alloy metals made of titanium and other metals. Titanium is an important structural metal developed in the 1950s. Titanium alloys have the advantages of high strength, good corrosion resistance and high heat resistance. Because of their mechanical properties, titanium alloys are also favored by all parties. At present, titanium alloy forgings are widely used in a certain type of domestic advanced aero-engine, especially the TC2 titanium alloy casing accounts for more than 60%. It is a medium-strength α-β two-phase titanium alloy with excellent comprehensive mechanical properties. , The long-term working temperature of the alloy is 350°C-400°C. [0003] The outer ring of the intake casing is a large special-...
Claims
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IPC IPC(8): B21H1/06B21B3/00B21J5/08B21J5/10B23P15/00
CPCB21H1/06B21B3/00B21J5/08B21J5/10B23P15/00
Inventor 王骏刘智刘其源何方有
Owner WUXI PAIKE HEAVY CASTING & FORGING