Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing TiAl-based alloy formwork by precision-investment casting

A technology of investment precision casting and base alloy, which is applied in casting molding equipment, metal processing equipment, casting molds, etc., can solve the problems of slow drying of shell making, long production cycle of castings, high cost, and achieve high hygroscopicity and save production. The effect of high production cycle and moisture absorption speed

Inactive Publication Date: 2009-06-24
HARBIN INST OF TECH
View PDF0 Cites 46 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the invention is to solve the problems of slow shell drying, long casting production cycle and high cost in the existing TiAl-based alloy precision casting production process, and to provide a preparation method for investment precision casting TiAl-based alloy mold shell

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0008] Specific embodiment one: the preparation method of investment casting precision casting TiAl base alloy mold shell of the present embodiment is implemented according to the following steps: one, adopt SolidWorks software to design three-dimensional CAD model, save as STL file after converting with magic software, then STL file The data information is sent to the SLS rapid prototyping machine, the polystyrene powder with a diameter of less than 0.2mm is sintered layer by layer with selective laser sintering technology, and the investment mold is made after dipping in wax, and then the surface and interior of the investment mold are cleaned with industrial alcohol , dry in the air; 2. Add 60-mesh bauxite sand and polyvinyl alcohol 1788 powder into distilled water and stir at a stirring speed of 300-400r / min until the polyvinyl alcohol 1788 powder is evenly wrapped on the surface of the bauxite sand, and then At 60-80°C, dry for 3-4 hours and grind for 1 hour; 3. After mixi...

specific Embodiment approach 2

[0015] Embodiment 2: This embodiment differs from Embodiment 1 in that the stirring speed in step 2 is 320-380 r / min. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0016] Embodiment 3: This embodiment differs from Embodiment 1 in that the stirring speed in step 2 is 350 r / min. Other steps and parameters are the same as those in Embodiment 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Granularityaaaaaaaaaa
Granularityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing a shuttering for a precision investment casting TiAl-based alloy, and relates to a method for preparing an oxide ceramic shuttering. The method solves the problems of slow drying for making the shuttering, longer production period for cast and high cost during production of a TiAl-based alloy precise cast. The preparation method comprises: firstly, adopting SLS technology to prepare a fusible pattern; secondly, coating polyvinyl alcohol on the surface of bauxite and grinding the bauxite into granules; thirdly, smearing a shuttering surface layer; fourthly, smearing a shuttering back layer; fifthly, removing wax from the shuttering, and roasting the shuttering; and sixthly, casting the TiAl-based alloy in vacuum to obtain the TiAl-based alloy cast. The method only needs 13 to 15 days to obtain the TiAl-based alloy precise cast from CAD design, but the prior method at least needs 45 to 60 days, so the method saves nearly two thirds of production period, and the manufacturing cost is correspondingly lowered.

Description

technical field [0001] The invention relates to a preparation method of an oxide ceramic mold shell. Background technique [0002] Lightweight and high temperature resistant structural materials and their preparation and processing technology are important material basis for the development of aerospace. As the flight speed of new aircraft increases and the flight speed increases, the demand for lightweight high-temperature resistant structural materials for new aircraft is extremely urgent. The TiAl-based alloy has a low density (4g / cm 3 ), high strength (700MPa), high stiffness (20°C, 175GPa; 700°C, 150GPa), high temperature resistance (use temperature up to 750°C) and excellent oxidation resistance (better oxidation resistance below 800°C) , is expected to replace nickel-based superalloys (density 8.7g / cm 3 ) and applied to the manufacture of new aircraft. However, the low room temperature brittleness and difficult processing of TiAl-based alloys are the bottlenecks t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B22C9/04B22C7/02B22C3/00
Inventor 陈玉勇陈艳飞田竟肖树龙孔凡涛徐丽娟王惠光刘志光
Owner HARBIN INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com