Method for manufacturing superplastic forming ceramic thin-wall product

A technology for superplastic molding and thin-walled products, which is applied in the field of thin-walled product manufacturing, can solve problems such as gas sealing difficulties, and achieve the effects of increased production efficiency, low efficiency, and high cost

Inactive Publication Date: 2012-09-12
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to solve the problem that the existing method for ceramic thin-walled products requires not only blank-holding force, but also an external air source to inflate the mold to complete the bulging, and difficult gas sealing. Manufacturing method of molded ceramic thin-walled product

Method used

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  • Method for manufacturing superplastic forming ceramic thin-wall product
  • Method for manufacturing superplastic forming ceramic thin-wall product
  • Method for manufacturing superplastic forming ceramic thin-wall product

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Experimental program
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specific Embodiment approach 1

[0010] Embodiment 1: The manufacturing method of superplastic molded ceramic thin-walled products in this embodiment is as follows: 1. Put the gasification agent into a container made of superplastic titanium alloy, and then seal the container to form an air bag; 2. Put the air bag Put it into the groove in the lower mold, then cover the upper surface of the groove of the lower mold with a superplastic ceramic circular thin plate with a thickness of 2mm to 6mm, and then place the upper mold on the lower mold to obtain the workpiece; 3. Put the workpiece Put it into a vacuum hot-pressing sintering furnace, and keep it warm for 10-30 minutes under the condition that the upper surface pressure of the workpiece is 1MPa-10MPa and the temperature is 800-1000℃; 4. The upper surface pressure of the workpiece processed in step 3 is 15MPa ~30MPa, temperature 1400℃~1700℃ under the condition of heat preservation for 30~90 minutes, then cooling to room temperature, demoulding, and then mach...

specific Embodiment approach 2

[0011] Embodiment 2: This embodiment differs from Embodiment 1 in that the superplastic molded ceramic thin-walled product is a superplastic molded ceramic hemispherical product. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0012] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 2, the superplastic ceramic circular thin plate is a composite ceramic circular thin plate mixed with ultra-fine grained zirconia and ultra-fine grained alumina. Fine-grain zirconia ceramic round sheet or ultra-fine-grain alumina ceramic round sheet. Others are the same as those in the first or second embodiment.

[0013] In this embodiment, in the multi-phase ceramic circular thin plate mixed with ultrafine grain zirconia and ultrafine grain alumina, the ratio of ultrafine grain zirconia to ultrafine grain alumina is arbitrary.

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Abstract

The invention provides a method for manufacturing a superplastic forming ceramic thin-wall product, belonging to the method for manufacturing a thin-wall product and aiming at solving the problems that the method for manufacturing the traditional ceramic thin-wall product needs the edge pressing force and also needs the exterior air source to inflate and expand the mould, and the air sealing is difficult. The method comprises the following steps of: (1) preparing an air bag; (2) preparing workpieces; and (3) putting the workpieces into a vacuum hot press sintering furnace, preserving the heatof the workpiece twice, cooling to room temperature, demoulding and removing the air bag to obtain the superplatic forming ceramic thin-wall product. The method of the invention does not need edge pressing force and does not need to lead air to the mould in the vacuum hot press sintering furnace, the ceramic material can be formed into integral parts at one time after the gasifying agent sealed in the air bag is expanded, the formability of the superplastic forming material is good, and the net forming can be realized.

Description

technical field [0001] The invention relates to a method for manufacturing thin-walled products. Background technique [0002] As one of the three pillars of materials, ceramic materials play an important role in modern industrial production. Nano-ceramics have excellent room temperature and high temperature mechanical properties, flexural strength, and fracture toughness, making them widely used in cutting tools, bearings, high-temperature engine components, etc., and in many harsh environments such as ultra-high temperature and strong corrosion It plays an irreplaceable role for other materials and has broad application prospects. [0003] However, due to the brittleness and hardness of ceramic materials, the current processing methods for ceramic thin-walled products are generally mechanical processing or hot pressing and sintering in simple-shaped molds, but these methods have high cost, low efficiency, or can only produce simple-shaped parts. Shortcomings. Utilizing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/622C04B35/48C04B35/10C04B35/645
Inventor 王国峰张凯锋
Owner HARBIN INST OF TECH
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