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Forging process method of Ti2AlNb alloy large-size disk parts

A process method, large-scale technology, applied in the field of new materials, can solve problems such as uneven tissue

Active Publication Date: 2014-08-27
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The object of the invention is to provide a Ti 2 AlNb alloy large-scale forging process method, which can overcome Ti 2 Large-size AlNb alloy forging cracks and uneven structure defects, to obtain large-size forgings, improve the yield of finished products

Method used

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Embodiment

[0011] Implementation example of the present invention: a certain engine rectification section uses Ti 2 The size of the AlNb alloy disc forging is φ610±10mm and the height is 100±5mm. The disc forging adopts Ti with the nominal composition of Ti-22Al-25Nb (at%) 2 Preparation of AlNb alloy, the billet is Ti with a diameter of φ380mm 2 φ300mm×400mm Ti made of AlNb alloy ingot after homogenization, billet opening and reforging 2 AlNb alloy rods. The billet is heated in the electric furnace before forging, and the furnace is warmed up, and the holding time is 100min. Before forging, the hammer anvil and the pressure head are preheated to 250°C, and a 30mm thick asbestos insulation felt is placed on the upper and lower surfaces of the billet. The height of the billet is measured after the first fire deformation. 203mm, return to the furnace while it is hot, after 30 minutes of heat preservation, the second fire deforms, the measured height of the billet after deformation is 105...

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Abstract

The invention discloses a forging process method of TI2AlNb alloy large-size disk parts. The forging process method optimizes the base technical parameters of thermal deformation of alloy according to the optimal deformation and organization control conditions of the alloy, by reasonable control to heating modes, heating temperature, forging deformation rate and deformation degree of blanks as well as final optimization of post-forming thermal treatment schedules, effectively solves the problems of crack proneness, uneven organization and the like during the forging process due to temperature rise and drop differences and uneven deformation of every parts, and accordingly can be applied to forging the large-size disk parts. The forging process method of the TI2AlNb alloy large-size disk parts sets norms and standards for alloy blank forging processes, can guarantee that the forged TI2AlNb alloy large-size disk parts are intact in appearance and has no defects such as cracks, the size allowance of the TI2AlNb alloy large-size disk parts can meet the machining requirements, the chemical components and the mechanical properties of the TI2AlNb alloy large-size disk parts can meet the design requirements. Therefore, the forging process method of the TI2AlNb alloy large-size disk parts is very applicable to popularization in application of large-size disc-shaped structural parts.

Description

technical field [0001] The invention belongs to the field of new materials, and in particular relates to a novel intermetallic compound high temperature resistant lightweight structure material Ti 2 Forging forming method of AlNb alloy large-size disc. Background technique [0002] In order to achieve the purpose of reducing the weight of the engine, it is necessary to replace the current superalloy with a new type of lightweight high-temperature-resistant structural material. Ti 2 AlNb alloy is a new type of Ti-Al intermetallic compound material developed in the early 1990s. Has a low density (about 5.3g / cm 3 ), high elastic modulus, high temperature strength, high fracture toughness, high creep resistance, low thermal expansion coefficient, non-magnetic and good flame retardancy, etc., it is used as a light specific gravity high temperature structural material for the production of aviation and aerospace engine heat end parts, which will contribute to technological adv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/06B21J1/06
Inventor 梁晓波张建伟李世琼程云君
Owner CENT IRON & STEEL RES INST
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