Method for producing semi-solid state sizing agent for founding and the producing device

A semi-solid slurry and rheological casting technology, which is applied in the field of materials, can solve the problems of high cost and complex equipment, achieve low cost, increase the fracture rate and split rate, and improve the effect of heat exchange conditions

Inactive Publication Date: 2007-09-12
NORTHWESTERN POLYTECHNICAL UNIV
View PDF1 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the shortcomings of complex equipment and high cost in the semi-solid slurry preparation method in the prior art, and improve the quality of the semi-solid slurry at the same time, the present invention proposes a new semi-solid slurry preparation method

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
  • Method for producing semi-solid state sizing agent for founding and the producing device
  • Method for producing semi-solid state sizing agent for founding and the producing device
  • Method for producing semi-solid state sizing agent for founding and the producing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In this example, aluminum alloy semi-solid slurry is prepared, and the grade of the alloy used is ZL101.

[0029] This embodiment adopts the method of directly using the heat capacity of the deflector to cool the molten metal, which is suitable for the production of a small amount of semi-solid slurry at a time, and can directly use the heat capacity of the copper tube to quench the alloy liquid.

[0030] In practice, the molten metal is introduced into the mold through a high thermal conduction deflector with cooling effect, the temperature of the deflector is controlled below the liquidus temperature of the alloy, and the molten metal crystallizes on the inner wall of the deflector to grow into The dendrite morphology is broken by the liquid flow and enters the liquid phase to form a semi-solid slurry.

[0031] The device (accompanying drawing 1) of implementing this method comprises molten metal insulation crucible 3, deflector 2 and mold 1. Wherein, the deflector 2...

Embodiment 2

[0036] This example is to prepare magnesium alloy semi-solid slurry, and the grade of alloy used is ZM5.

[0037] In this embodiment, a thermostat is installed on the outer wall of the deflector to forcibly cool the deflector, which is suitable for the production of large quantities of semi-solid slurry.

[0038] In practice, the molten metal is introduced into the mold through a high thermal conduction deflector with cooling effect, and the temperature controller installed on the outer wall of the deflector is used to force the molten metal attached to the inner wall of the deflector. After cooling, the molten metal crystallizes and grows into a developed dendrite morphology on the inner wall of the deflector, which is washed and broken by the liquid flow and then enters the liquid phase to form a semi-solid slurry.

[0039] The device (accompanying drawing 2) that implements this method comprises molten metal insulation crucible 3, deflector 2, thermostat 6 and mold 1, where...

Embodiment 3

[0044] In this example, a magnesium alloy semi-solid slurry is prepared, and the grade of the alloy used is AZ91.

[0045] This embodiment adopts the method of installing a vibrating device on the outer wall of the deflector to force the deflector to vibrate, which is suitable for the production of small batches of high-quality semi-solid slurry.

[0046] In practice, the molten metal is introduced into the mold through a high thermal conduction deflector with cooling effect, the temperature of the deflector is controlled below the liquidus temperature of the alloy, and the molten metal crystallizes on the inner wall of the deflector to grow into The dendrite morphology is broken by the liquid flow and enters the liquid phase. Through the vibrating device installed on the outer wall of the deflector, the solid phase metal attached to the inner wall of the deflector is forced to vibrate, so that the solid phase adhered to the inner wall of the deflector is broken, and the solid...

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 present invention relates to process and apparatus for preparing semi-solid slurry for casting, and aims at raising quality of semi-solid slurry. The process of preparing semi-solid slurry with chilling and/or mechanical vibrating includes making molten metal liquid flow to the casting mold in a flow guide device with cooling effect, controlling the temperature of the flow guide device below liquid temperature of the metal for the metal liquid to grow crystal via chilling, flushing the fine crystal with the flowing metal liquid to make it produce necking, crack and breaking and fuse into the liquid flow so as to form semi-solid slurry, and injecting the slurry into casting mold to complete semi-solid casting. The present invention has the features of low cost, simple technological process, and capacity of obtain semi-solid slurry with rich well dispersed and well nodularized solid particles.

Description

(1) Technical field [0001] The invention relates to the field of materials, and relates to a method and device for preparing semi-solid slurry for casting. (2) Background technology [0002] In recent years, metal semi-solid processing and forming technology has attracted more and more attention. Semi-solid casting technology is considered to be one of the most important metal processing and forming technologies in the 21st century because it has the characteristics of improving product quality, saving energy, and high productivity compared with traditional liquid casting. At present, there are two basic forms of metal semi-solid casting, which are rheocasting and thixocasting. [0003] Rheological casting refers to the rapid cooling of superheated molten metal to the temperature range where solid and liquid coexist, and strong stirring is applied to the alloy during the solidification process, so that the solid phase is suspended in the liquid phase in the form of a large ...

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): B22D1/00
Inventor 黄卫东王猛林鑫
Owner NORTHWESTERN POLYTECHNICAL 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