Discrete casting method for preparing homogenized cast ingot

A technology of homogenization and ingot casting, which is applied in the field of discrete casting for preparing homogenized ingots, can solve the problems of scrapping performance, uneven grains, cracking of forgings, etc., and achieves reduction of shrinkage defects and fine grain size , the effect of increasing the nucleation rate

Inactive Publication Date: 2016-06-15
SHANGHAI JIAO TONG UNIV
View PDF7 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ingots are used as the mother blank of large forgings. At present, the quality of ingot production is low, and the waste of materials and energy is serious.
Some defects in the ingot, such as inclusions and composition segregation, cannot be eliminated in the subsequent processing, resulting in the scrapping of forgings or poor performance; other defects, such as uneven grains, seriously affect subsequent forging forming, which may lead to mismatching of forging parameters The f

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
  • Discrete casting method for preparing homogenized cast ingot
  • Discrete casting method for preparing homogenized cast ingot
  • Discrete casting method for preparing homogenized cast ingot

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0044] In this example, a graphite crucible with a height of 140mm and a diameter of about 130mm is used as the ingot mold, and aluminum-copper alloy is used as the experimental material. The ingots will be separated into 4 packs for casting. For comparison, an ingot of a traditional casting method was cast under the same conditions as follows:

[0045] 1. Using the numerical simulation method to calculate the solidification process of the ingot, it is predicted that the pouring intervals of the second bag, the third bag, and the fourth bag are 30s, 45s, and 60s respectively;

[0046] 2. Add pure aluminum, raise the temperature until it melts, add aluminum-copper master alloy, refine and let the melt keep at 750°C to prepare for casting;

[0047] 3. After casting the first bag, wait for it to solidify for 30 seconds, start casting the second bag, cast the third bag after 45 seconds, and cast the last bag after 60 seconds;

[0048] 4. Casting an ingot using traditional castin...

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
Login to view more

Abstract

The invention discloses a discrete casting method for preparing a homogenized ingot, which comprises the following steps: step 1, numerically simulating the discrete pouring process, obtaining the relationship between the solid phase ratio and solidification time in the solidification process as the numerical simulation result; step 2, After smelting, degassing, and slag removal of the molten metal, the alloy liquid is obtained and ready for casting; step 3, adopt the top pouring casting method, use the alloy liquid to cast to a predetermined thickness, and stop pouring; step 4, track and measure the temperature in real time, refer to step 1 According to the numerical simulation results, when the solid phase ratio of the poured metal liquid reaches 70%-80%, the next casting is carried out; step 5, repeat steps 3 and 4 until the casting and solidification of the ingot is completed; step 6, heat treat the ingot To eliminate casting stress. Compared with the ordinary casting process, in the discrete casting method of the present invention, more metal surfaces are in contact with the environment, and the cooling rate is faster, which is helpful for grain refinement.

Description

technical field [0001] The invention relates to a casting method, in particular to a discrete casting method for preparing homogenized ingots. Background technique [0002] With the development of new energy construction, the demand for large castings and forgings at home and abroad has increased dramatically. Ingots are used as the mother blank of large forgings. At present, the quality of ingot production is low, and the waste of materials and energy is serious. Some defects in the ingot, such as inclusions and composition segregation, cannot be eliminated in the subsequent processing, resulting in the scrapping of forgings or poor performance; other defects, such as uneven grains, seriously affect subsequent forging forming, which may lead to mismatching of forging parameters Cause the forging to crack and be scrapped. According to statistics, 60% of unqualified products in the production of large-scale forgings are caused by the quality of ingots. As a result, the prod...

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): B22D7/00
CPCB22D7/00
Inventor 李军葛鸿浩任凤丽夏明许韩秀君胡侨丹张卫李建国
Owner SHANGHAI JIAO TONG UNIV
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