Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A Method for Suppressing Cracks in the Center of Ingot

A center crack and ingot casting technology, which is applied in the field of aluminum alloy semi-continuous casting production, can solve problems such as troublesome operation, achieve the effects of small casting speed, prevent cracks, and increase yield

Inactive Publication Date: 2016-01-20
KUNMING UNIV OF SCI & TECH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since this technology requires pressure facilities and dynamic control systems, etc.
The operation is cumbersome, and the success or failure of the process is closely related to personnel and equipment

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Put the industrial remelted aluminum ingot into an induction furnace for smelting. After the alloy is melted, it is transferred to the holding furnace to stand still, and the melt is refined, degassed and other treatments. After standing for a period of time, wait for the melt Perform semi-continuous casting when the temperature drops to 685~705℃;

[0016] (2) Before the start of semi-continuous casting, conventionally set the initial flow of cooling water to 0.2mpa and the initial casting speed of the casting machine to 40mm / min. After the start of casting, the alloy melt of step (1) starts Slowly flow into the mold through the diversion groove. When the length of the ingot reaches 120mm, the starter base starts to decrease according to the set speed. In 5s, the casting speed is increased to 120mm / min in the stable casting stage, and then maintained This casting speed is used for production, and the flow of cooling water is adjusted to 0.4mpa according to the surface ...

Embodiment 2

[0019] (1) Put the industrial remelted aluminum ingot into an induction furnace for smelting. After the alloy is melted, it is transferred to the holding furnace to stand still, and the melt is refined, degassed and other treatments. After standing for a period of time, wait for the melt Semi-continuous casting is carried out when the temperature drops to 675~695℃;

[0020] (2) Before the start of semi-continuous casting, conventionally set the initial flow of cooling water to 0.3mpa, and the initial casting speed of the casting machine to 60mm / min. After the start of casting, the alloy melt of step (1) starts Slowly flow into the mold through the diversion groove. When the length of the ingot reaches 30mm, the base of the starter starts to decrease according to the set speed. In 3s, the casting speed is increased to 120mm / min in the stable casting stage, and then maintained This casting speed is used for production, and the cooling water flow is adjusted to 0.5 mpa according to ...

Embodiment 3

[0023] (1) Put the industrial remelted aluminum ingot into an induction furnace for smelting. After the alloy is melted, it is transferred to the holding furnace to stand still, and the melt is refined, degassed and other treatments. After standing for a period of time, wait for the melt Perform semi-continuous casting when the temperature drops to 700~720℃;

[0024] (2) Before the start of semi-continuous casting, conventionally set the initial flow of cooling water to 0.4mpa and the initial casting speed of the casting machine to 34mm / min. After the start of casting, the alloy melt in step (1) starts Slowly flow into the mold through the diversion groove. When the length of the ingot reaches 35mm, the starter base starts to decrease according to the set speed. In 9s, the casting speed is increased to 45.3mm / min in the stable stage of casting, and then Maintain this casting speed for production, while adjusting the flow of cooling water to 0.6mpa according to the surface tempera...

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
lengthaaaaaaaaaa
Login to View More

Abstract

The invention provides a method for restraining a cast ingot central crack from being generated and belongs to the technical field of aluminum alloy semi-continuous casting production. The method includes that alloy melt is smelted and processed according to convention; before semi-continuous casting begins, initial flow of cooling water is set according to the convention, the initial casting rate of a casting machine is set as 1 / 3-3 / 4 of speed of a casting stabilization stage, and after casting starts, the alloy melt starts to flow into a crystallizer slowly through a flow guiding groove. When the length of the cast ingot reaches 30-120 mm, a dummy ingot base starts to descend according to set speed, casting rate is increased to the speed of the casting stabilization stage within 3-9s, and then production is conducted by keeping the casting speed. The method is used for optimizing casting process of an aluminum alloy cast ingot in the semi-continuous casting production process. The cast ingot produced by using the method is good in internal quality and free of central crack, product yield is improved, economical benefit is increased, and stress value in a casting process is effectively reduced so as to restrain the central crack from being generated effectively.

Description

Technical field [0001] The invention relates to a method for inhibiting the occurrence of central cracks in an ingot, and belongs to the technical field of aluminum alloy semi-continuous casting production. Background technique [0002] At present, shaft semi-continuous casting is the main process for producing aluminum alloy ingots. In the process of semi-continuous casting, center cracks are one of the common defects of ingots. In the subsequent mechanical processing, waste products are often generated due to center cracks, which seriously reduces the yield of products and affects economic benefits. For some aluminum alloy ingots with severe center cracks, the entire ingot will be scrapped. The reason for the center crack of the ingot is mainly because the temperature of the mold during the production process is too low. When the aluminum alloy melt begins to contact the mold, the surface cooling is faster than the internal cooling due to the chilling effect of the mold wall. ...

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 Patents(China)
IPC IPC(8): B22D11/16
Inventor 严继康贾瑞娇甘国友邱哲生周永全杜景红张家敏易健宏
Owner KUNMING UNIV OF SCI & TECH
Features
  • Generate Ideas
  • 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