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Vacuum creep shape righting method for titanium and titanium alloy panels

A titanium alloy and plate technology, which is applied in the field of titanium and titanium alloy plate processing, can solve problems such as low orthopedic temperature, inability to fully release plate stress, and failure to meet unevenness requirements, so as to reduce residual stress and uniform distribution of residual stress Effect

Inactive Publication Date: 2015-08-19
BAOJI TITANIUM IND CO LTD
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AI Technical Summary

Problems solved by technology

Due to the limitations of offline orthopedic equipment: low orthopedic temperature and small unit pressure, the internal residual stress of the plate cannot be completely released after stress relief orthopedic, and the plate cannot meet the requirements for unevenness of subsequent material processing after orthopedic

Method used

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  • Vacuum creep shape righting method for titanium and titanium alloy panels

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Embodiment

[0013] Embodiment: a method for orthopedic treatment of a titanium alloy plate with a thickness of 40mm, a width of 2000mm, and a length of 4000mm.

[0014] Step 1: First, stack the boards to be treated (1) neatly on the orthopedic table (3) in the vacuum creep orthopedic furnace (2), and then cover the boards to be treated with asbestos felt I (4) sequentially and heat-resistant diaphragm (5), then fill the furnace body with gravel (6) above the heat-resistant diaphragm (5), and finally cover the furnace mouth with asbestos felt II (7) and sealing film (8) to seal the furnace chamber ;

[0015] Step 2: Vacuum the furnace cavity to a vacuum degree of 100pa, when the orthopedic pressure reaches 50000N / m 2 Then start the heating system (9) to start heating, the heating temperature is controlled at about 700°C, and kept at this temperature for 5 hours, so that the residual stress inside the titanium alloy plate can be fully released, so as to achieve the purpose of leveling;

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Abstract

A vacuum creep shape righting method for titanium and titanium alloy panels includes the steps of firstly, stacking panels to be processed on a shape righting table top in a vacuum creep shape righting furnace according to sizes and specifications, covering the panels to be processed with asbestos felt I and a heat-resisting membrane, filling gravels in a furnace body above the heat-resisting membrane and sealing a furnace chamber by covering a furnace door with asbestos felt II and a sealing membrane; secondly, vacuumizing the furnace chamber, starting a heating system to start to heat when the vacuum degree is not larger than 100pa, controlling the heating temperature within 500-800 DEG C, and preserving the heat 4-6 hours; thirdly, starting a water cooling system to cool after heat preservation, feeding air into the furnace chamber when the temperature is cooled to 80 DEG C, and discharging the processed panels when intensity of pressure inside the furnace chamber is identical to that outside the furnace chamber. The vacuum creep shape righting method for the titanium and titanium alloy panels has the advantages that internal residual stress in the panels can be lowered and enabled to be distributed uniformly, and the unevenness degree not larger than 3mm / m is guaranteed for the panels.

Description

technical field [0001] The invention relates to the field of processing titanium and titanium alloy plates, in particular to a vacuum creep correction method for titanium and titanium alloy plates. Background technique [0002] Due to the high yield strength, low elastic modulus, and poor stiffness of titanium and titanium alloy plates, the rebound phenomenon of titanium and titanium alloy plates is obvious during processing, and the shape control is relatively difficult, which cannot meet the requirements for unevenness in the standard. In production, the shape of the plate needs to be processed through subsequent thermal shaping. From the perspective of material plastic processing itself, the main cause of poor plate shape (warping, scooping) is the uneven distribution of residual stress inside the material. At present, the orthopedic treatment of titanium and titanium alloy plates mainly relies on online roller straightening or off-line pressure orthopedics. [0003] On...

Claims

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Application Information

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IPC IPC(8): B21D1/00
CPCB21D1/00
Inventor 庞洪王红武高飞董震健
Owner BAOJI TITANIUM IND CO LTD
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