Prediction simulation method for macrosegregation and precipitation of inclusions in cast ingot

A technology of macro-segregation and simulation method, which is applied in the field of solidification process simulation of metal ingots, can solve the problem of not considering the influence of precipitation inclusions on the final segregation, not tracking inclusion distribution and quantitative analysis of nucleation conditions, and rarely considering liquid at the same time. issues of interaction

Pending Publication Date: 2022-07-08
SHANGHAI JIAO TONG UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are the following main problems in the simulation methods used for ingot segregation prediction at home and abroad: the interaction of liquid phase, equiaxed crystals, columnar crystals and inclusions is rarely considered at the same time; the influence of precipitation of inclusions on the final segregation is not considered ; Hardly follow the distribution of inclusions and quantitative analysis of nucleation conditions

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
  • Prediction simulation method for macrosegregation and precipitation of inclusions in cast ingot
  • Prediction simulation method for macrosegregation and precipitation of inclusions in cast ingot
  • Prediction simulation method for macrosegregation and precipitation of inclusions in cast ingot

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0065] The following describes several preferred embodiments of the present invention with reference to the accompanying drawings, so as to make its technical content clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the protection scope of the present invention is not limited to the embodiments mentioned herein.

[0066] In the drawings, structurally identical components are denoted by the same numerals, and structurally or functionally similar components are denoted by like numerals throughout. The size and thickness of each component shown in the drawings are arbitrarily shown, and the present invention does not limit the size and thickness of each component. In order to make the illustration clearer, the thicknesses of components are appropriately exaggerated in some places in the drawings.

[0067] Taking the precipitation simulation of MnS inclusions in steel ingots as an example, the specific steps of th...

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

No PUM Login to view more

Abstract

The invention discloses a prediction simulation method for macrosegregation and precipitation of inclusions in a cast ingot. The prediction simulation method comprises the following steps: obtaining thermophysical parameters of a metal material and the inclusions; obtaining nucleation thermodynamic conditions of the inclusions; calculating and solving mass, momentum, energy and solute transmission required by solidification of the metal material; setting calculation boundary conditions, initializing calculation conditions, starting circulation, solving mass, momentum, energy and solute transmission of a liquid phase, a solid phase in an isometric crystal and a columnar crystal phase of the metal material in a coupling manner, judging nucleation and growth of the inclusions according to a thermodynamic nucleation bar criterion of the inclusions, and solving a distribution domain of the size and the number of the inclusions; the thermophysical property parameters are updated, convergence conditions are judged, and whether repeated iteration is conducted or not is determined according to the judgment result; and obtaining a simulation result until the cast ingot is solidified. The method is suitable for predicting macroscopic component distribution and inclusion distribution of various alloys and different tonnages of cast ingots, and has a reference effect on optimization of a cast ingot preparation process.

Description

technical field [0001] The invention relates to the field of metal ingot solidification process simulation, in particular to a prediction and simulation method for macrosegregation and precipitation inclusions in the ingot. Background technique [0002] Component segregation during solidification is an inherent characteristic of alloys. Therefore, there is a phenomenon of inhomogeneous composition in the ingot after solidification, which is called macrosegregation; macrosegregation is not only related to the properties of the material, but also to the liquid flow, equiaxed crystal deposition, and the formation and flow of non-metallic impurities in the material during the solidification process. During the solidification process, as the temperature decreases and the solute is enriched in the residual liquid phase, a considerable part of the solute elements combine with non-metallic elements to easily precipitate inclusions. This process consumes part of the solute and change...

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): G06F30/20G06F17/13G06F119/08
CPCG06F30/20G06F17/13G06F2119/08Y02P10/20
Inventor 李军夏明许曾龙李建国
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