Titanium alloy thin-wall part hot-stretch creep deformation composite molding method

A technology of thin-walled parts and composite forming, which is applied in the forming of metal parts and the field of thermal stretching and creep composite forming of titanium alloy thin-walled parts, which can solve the problems of waste of energy, poor forming quality of thin-plate parts, and low heat utilization rate. Achieve the effect of improving forming precision, constant temperature and uniform temperature distribution

Active Publication Date: 2012-03-07
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of low heat utilization rate and wasting a lot of energy if only the blank is heated when the titanium alloy thin-w

Method used

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  • Titanium alloy thin-wall part hot-stretch creep deformation composite molding method
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  • Titanium alloy thin-wall part hot-stretch creep deformation composite molding method

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Embodiment Construction

[0035] One of the specific implementation methods: the following combination Figure 1 to Figure 6 Illustrate the concrete forming method of the present invention, the forming device of use, see figure 2 , including power supply 1, stretch forming equipment 2, mold tooling 3, electrode splint 4, thermocouple 5, temperature control system 6, forming machine jaw 7, insulating cushion 8 and blank 9 to be formed.

[0036] See image 3 , the mold tooling 3 includes a mold 10, an incubator 11 and a backing plate 12, and the mold tooling 3 is placed on the workbench in the middle of the stretch forming equipment 2; the blank 9 to be formed passes through the gap 13 of the side wall of the mold box, and the blank to be formed 9 both ends are placed in the jaws 7 of the forming machine, and an insulating cushion 8 asbestos cloth is placed between the blank 9 to be formed and the jaws 7 of the forming machine to realize insulation; Electric heating to be formed blank 9,

[0037] See ...

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Abstract

The invention discloses a titanium alloy thin-wall part hot-stretch creep deformation composite molding method. The titanium alloy thin-wall part hot-stretch creep deformation composite molding method comprises eight steps that 1, equipment and raw materials are prepared; 2, electrode splints are electrified and a blank material needing to be molded is heated; 3, real-time measure of a temperature of the blank material needing to be molded is carried out and output voltage of a power supply is adjusted in real time to realize a blank material heating rate of 5 to 25 DEG C per second; 4, when a temperature of the blank material needing to be molded is in a range of 600 to 750 DEG C, jaws of a stretch molding device clamp the blank material needing to be molded and the blank material needing to be molded is subjected to pre-stretch at a preset strain rate; 5, when a pre-strain ratio is in a range of 0.1 to 4%, the molded blank material is subjected to coating at a temperature of 600 to 750 DEG C and a preset strain rate until the molded blank material is completely fitted to a mold; 6, the molded blank material treated by the step 5 is subjected to stretch supplement at a temperature of 600 to 750 DEG C and a preset strain rate until an end strain ratio is in a range of 0.1 to 8%; 7, the molded blank material treated by the step 6 is subjected to heat preservation for a period of time so that stress relaxation in the molded blank material occurs and creep deformation molding is realized; and 8, the powder supply is cut off and the molded blank material treated by the step 7 is cooled and is taken down.

Description

technical field [0001] The invention relates to a forming method of metal parts, in particular to a thermal stretching creep composite forming method of a titanium alloy thin-walled part, which belongs to the technical field of thermal processing. technical background [0002] Titanium alloy materials have high specific strength, high ultimate strength, and excellent metallurgical compatibility and coordination characteristics with composite materials, and small galvanic corrosion. Therefore, large titanium alloy thin-walled parts are high-temperature resistant and long-life in the aerospace field. Advanced lightweight and high-efficiency structures are required to be preferred, but their precise forming is difficult and the process is complicated, and thermoforming is usually used. If the traditional billet heating method is adopted, such as flame heating, blowtorch heating, heating furnace to heat the billet, etc., the heat dissipation speed of the thin-walled parts is fas...

Claims

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Application Information

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IPC IPC(8): C22F1/18
Inventor 李小强肖军杰李东升张超
Owner BEIHANG UNIV
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