Check patentability & draft patents in minutes with Patsnap Eureka AI!

Method for preparing thixomolding plate blank

A technology of thixotropic deformation and slab, applied in welding equipment, manufacturing tools, non-electric welding equipment, etc., can solve problems such as complex process, coarse grain of composite materials, and plate size limitation, and achieve excellent thixotropic performance, spherical The effect of high degree of crystallization and fine grain size

Inactive Publication Date: 2012-06-13
CHONGQING UNIV
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It can be seen that in the process of preparing alloy semi-solid billets by controlling the solidification of alloys, the grains of the prepared composite materials are coarse and the spheroidization effect is not ideal.
Although the new SIMA method has certain advantages over other methods for preparing semi-solid billets, due to the complexity of the process, the degree of grain spheroidization is not ideal, and it is limited by the size of the plate.

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 preparing thixomolding plate blank
  • Method for preparing thixomolding plate blank
  • Method for preparing thixomolding plate blank

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The experimental material is a semi-continuous cast 7075 aluminum alloy, and its chemical composition is: wt% 5.6Zn-2.5Mg-1.6Cu-0.23Cr-balAl. Firstly, the as-cast 7075 alloy plate with a thickness of 15mm was cut out, and the obtained alloy plate was kept at 462°C for 24 hours, then heated to 470°C at a rate of 0.5°C / min and held for 4 hours, and then water quenched; Secondly, the friction stir welding processing experiment of the 7075 aluminum alloy was carried out. The shoulder width of the stirring processing tool used was 16 mm, the needle was a tapered needle with an upper width of 10 mm, a lower width of 8 mm, and a length of 14.9 mm. 0.5mm thread, during the mixing process, the inclination angle of the mixing tool is 2.5°. After the workpiece is fixed, under the conditions of tool rotation speed of 1500rpm and travel speed of 15-25mm / min, according to figure 2 The processing path shown is multi-pass processing; again, the plate after friction stir processing is...

Embodiment 2

[0026] The experimental material is A356 alloy, and the chemical composition of A356 is wt% 7Si-0.32Mg-0.14Fe-0.19Cu-0.08Mn-0.09Zn-0.20Ti-balAl. Firstly, the as-cast A356 alloy sheet with a thickness of 10mm was cut out, and the obtained alloy sheet was kept at 535°C for 2-4 hours, and then water quenched; secondly, the A356 aluminum alloy was subjected to friction stir welding processing experiments. The shoulder width of the mixing tool used is 20mm, the needle is a tapered needle with an upper width of 14mm, a lower width of 12mm, and a length of 9.9mm. The side is provided with a thread with a pitch of 0.5mm. During the mixing process, the inclination angle of the mixing tool is 2.5°. After fixing the workpiece, under the conditions of 1000rpm tool rotation speed and 10-15mm / min travel speed, according to figure 2 The processing path shown is multi-pass processing; again, the plate after friction stir processing is cut and trimmed; finally, the slab is quickly heated to ...

Embodiment 3

[0028] The experimental material is cast AM60 magnesium alloy material, and its alloy composition is: wt% 6.5Al-0.13Mn-0.005Fe-0.01Cu-0.02Ni-Bal.Mg. Firstly, the AM60 as-cast magnesium alloy sheet with a thickness of 10mm was cut out, and the obtained alloy sheet was first heated to 350°C in a box-type resistance furnace, kept for 1h, then heated to 410°C, held for 20h, and quenched with 70°C water Secondly, the friction stir welding processing experiment was carried out on the AM60 as-cast magnesium alloy material. The shoulder width of the stirring processing tool used was 16 mm, and the needle was a tapered needle with an upper width of 10 mm, a lower width of 8 mm, and a length of 9.9 mm. The side is provided with a thread with a pitch of 0.2mm, and the inclination angle of the stirring tool is 2.5° during the stirring process. After the workpiece is fixed, under the conditions of tool rotation speed of 1500rpm and travel speed of 15-25mm / min, according to figure 2 The p...

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 relates to a method for preparing a thixomolding plate blank, which can meet the requirement of thixomolding of semisolid alloys. The method comprises the following steps of: performing homogenization annealing heat treatment on an obtained cast plate; repeatedly processing the obtained plate blank by a stir and friction processing method by using a stirring tool at a high rotating speed and a low advancing speed to obtain a fine grain structure on the whole plate blank; and cutting the plate, trimming, performing stir and friction processing, quickly heating in a heating furnace to obtain an alloy plate, feeding into a semisolid temperature region, and keeping a semisolid temperature to be a balanced temperature to obtain the semisolid alloy plate blank. A semisolid alloy material prepared by the method has small crystal grains, a high balling degree and a high thixotropic property; and the method has a simple preparation process and is not limited by the dimension of the plate blank.

Description

technical field [0001] The invention relates to a method for preparing a slab for thixoforming. The invention can be used for preparing semi-solid alloy slabs for thixotropic deformation, and the prepared semi-solid alloy has the advantages of fine unmelted solid phase grains, high degree of spheroidization, excellent thixotropic performance, and simple preparation process. Background technique [0002] Semi-solid thixoforming technology is a very good near net shape technology for alloys and composite materials. Since the technology was proposed by Professor Flemings of MIT in the 1970s, it has been widely used in the fields of automobiles, electronics and 3C. Semi-solid thixoforming technology usually includes three processes of semi-solid billet preparation, secondary heating and semi-solid thixoforming, among which the most critical technology is semi-solid billet preparation. So far, the preparation methods of semi-solid blanks mainly include mechanical stirring metho...

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): B23K20/12B23K20/24
Inventor 薛寒松孙文菊刘明翔王开
Owner CHONGQING UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com