Production method of thick and large titanium alloy fired mold precision casting

A technology of precision castings and production methods, applied in the direction of molds, cores, mold components, etc., can solve the problems of low quality investment castings, achieve the effects of shortening the production cycle, improving surface quality, and reducing production costs

Inactive Publication Date: 2017-06-13
LUOYANG SUNRUI TI PRECISION CASTING
View PDF8 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defects of low quality of existing investment castings, the present invention provides a production method of thick and large titanium alloy investment castings

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Production method of thick and large titanium alloy fired mold precision casting
  • Production method of thick and large titanium alloy fired mold precision casting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Example 1: Test object primary pump casing casting

[0056] The first step, wax mold preparation: use the wax injection machine to prepare the wax mold required for production;

[0057] Continuing from the previous step, the second step is wax mold cleaning: use acidic wax mold cleaning solution to clean the wax mold to remove surface oil and debris;

[0058] Continuing from the previous step, the third step is the preparation of the surface layer of the mold shell: the ratio of the surface layer slurry: the mass ratio of 325 mesh yttrium oxide powder to silica sol is 5:1, stir at room temperature 200r / min for 30min, let stand for 50-70min, and wax the mold Stain the wax model with 60-120 mesh yttrium oxide sand after dipping in the slurry, and dry it in a constant temperature and humidity workshop for 24 hours; the temperature in the constant temperature and humidity workshop is 23°C and the humidity is 25%;

[0059] Continuing from the previous step, the fourth step ...

Embodiment 2

[0081] Embodiment 2: The test object is the casting of the mounting bracket

[0082] The first step, wax mold preparation: use the wax injection machine to prepare the wax mold required for production;

[0083] Continuing from the previous step, the second step is wax mold cleaning: use acidic wax mold cleaning solution to clean the wax mold to remove surface oil and debris;

[0084]Continuing from the previous step, the third step is the preparation of the surface layer of the mold shell: the ratio of the surface layer slurry: the ratio of 325 mesh yttrium oxide powder to silica sol is 5:1, stir at room temperature 200r / min for 30 minutes, let stand for 50-70min, and wax the mold Stain the wax model with 60-120 mesh yttrium sand after dipping in the slurry, and dry it in a constant temperature and humidity workshop for 24 hours; the temperature in the constant temperature and humidity workshop is 25°C and the humidity is 40%;

[0085] Continuing from the previous step, the f...

Embodiment 3

[0106] Embodiment 3: The test object is a bracket and a fixed plate

[0107] The first step, wax mold preparation: use the wax injection machine to prepare the wax mold required for production;

[0108] Continuing from the previous step, the second step is wax mold cleaning: use acidic wax mold cleaning solution to clean the wax mold to remove surface oil and debris;

[0109] Continuing from the previous step, the third step is the preparation of the surface layer of the mold shell: the ratio of the surface layer slurry: the ratio of silica sol to 325 mesh yttrium oxide powder is 1:5, stir at room temperature 200r / min for 30 minutes, let stand for 50-70min, and wax the mold Stain the wax model with 60-120 mesh yttrium sand after dipping in the slurry, and dry it in a constant temperature and humidity workshop for 24 hours; the temperature in the constant temperature and humidity workshop is 21°C and the humidity is 35%;

[0110] Continuing from the previous step, the fourth s...

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to view more

Abstract

A production method of thick and large titanium alloy investment castings, including the steps of preparing a wax pattern, dipping the slurry twice, preparing the back layer of the mold shell in a constant temperature and humidity workshop, dewaxing, high temperature sintering, pouring, shell cleaning, and pouring removal The step of producing titanium alloy investment casting after the system, removing the quality defects of the titanium alloy investment casting, and obtaining the titanium alloy investment precision casting. The invention adopts the concept of innovative process design in the whole process, and solves the problem of remelting of the dewaxed surface layer and internal slag addition of thick and large titanium alloy investment mold precision castings by formulating a reasonable production process plan route, selecting the ratio of mold shell surface material and pickling process and surface cracks. At the same time, the invention can effectively reduce the production cost, shorten the production cycle, reduce the subsequent trimming time, and improve the surface quality of the casting.

Description

technical field [0001] The invention relates to the technical field of titanium alloy investment precision castings, in particular to a production method of thick and large titanium alloy investment precision castings. Background technique [0002] Investment casting is a casting method that uses fusible primary mold material and sequential molding to make the casting shape. The casting produced by this method has low surface roughness and precise size, also known as investment precision casting. At present, in the casting process of titanium alloy investment precision castings, the surface layer material slurry is often made of zirconium acetate solution and yttrium oxide powder. For thick and large titanium alloy castings with a width of more than 300mm×300mm, the wax pattern used in the wax pattern is likely to cause the surface layer to melt back during the dewaxing process, resulting in internal slag inclusions in the casting. In addition, titanium alloy has strong act...

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
Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04B22C7/02B22C3/00C22F1/18C22F1/02C23G1/10B22D31/00
CPCB22C9/043B22C3/00B22C7/02B22D31/002C22F1/02C22F1/183C23G1/106
Inventor 李伟东刘茵琪周洪强史许娜
Owner LUOYANG SUNRUI TI PRECISION CASTING
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap