Method for improving hardness of Al-Si alloy

A technology of aluminum-silicon alloy and hardness, which is applied in the field of metal materials, can solve the problems of limited hardness of aluminum-silicon alloy, and achieve the effects of low cost, elimination of pores, and size reduction

Active Publication Date: 2012-09-12
南通东湖国际商务服务有限公司
View PDF1 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method is easy to be applied in industry, but it is still limited to improve the hardness of aluminum-silicon alloy

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 improving hardness of Al-Si alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The aluminum-silicon alloy whose chemical composition (mass fraction wt%) is Al 93.03%, Si 4.63%, Cu 1.47%, Mg0.51%, Mn0.36 is placed in a KLX-12B box-type resistance furnace for solid solution treatment, The heating temperature is 520°C, the holding time is 120min, and the furnace is water-cooled. Then put the aluminum-silicon alloy after the above solid solution treatment on a CS-IIB six-sided top press for high-pressure treatment, the pressure is 1GPa, the heating temperature is 180°C, the holding time is 150min, and the power is turned off and the pressure is kept and cooled to room temperature. . The hardness test results are shown in Table 1.

Embodiment 2

[0014] The aluminum-silicon alloy whose chemical composition (mass fraction wt%) is Al 94.5%, Si 4.0%, Cu 1.0%, Mg0.3%, Mn0.2 is placed in a KLX-12B box-type resistance furnace for solid solution treatment, The heating temperature is 515°C, the holding time is 130min, and the furnace is water-cooled. Then put the aluminum-silicon alloy after the above solid solution treatment on a CS-IIB six-sided top press for high-pressure treatment, the pressure is 3GPa, the heating temperature is 200°C, the holding time is 120min, and the power is turned off and the pressure is kept and cooled to room temperature. . The hardness test results are shown in Table 1.

Embodiment 3

[0016] The aluminum-silicon alloy whose chemical composition (mass fraction wt%) is Al 90.6%, Si 6.0%, Cu 2.0%, Mg0.7%, Mn0.7 is placed in a KLX-12B box-type resistance furnace for solid solution treatment, The heating temperature is 525°C, the holding time is 150min, and the furnace is water-cooled. Then put the aluminum-silicon alloy after the above solid solution treatment on a CS-IIB six-sided top press for high-pressure treatment, the pressure is 2GPa, the heating temperature is 190°C, the holding time is 140min, and the power is turned off and the pressure is kept and cooled to room temperature. . The hardness test results are shown in Table 1.

[0017] Table 1 Hardness test results of Al-Si alloys in different states

[0018]

[0019] Note: The solid solution + aging process is: heating at 520°C for 120 minutes, water cooling, and then holding at 180°C for 150 minutes.

[0020] The above experimental results show that the aluminum-silicon alloy has higher hardness...

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

A method for improving the hardness of an Al-Si alloy mainly comprises the following steps: putting the Al-Si alloy into a resistance furnace, heating to 515-525DEG C, maintaining the temperature for 120-150min, discharging the alloy from the furnace, and cooling with water, wherein the alloy comprises 4.0-6.0wt% of Si, 0-2.0wt% of Cu, 0.3-0.7wt% of Mg, 0.2-0.7wt% of Mn, and the balance Al; and putting the Al-Si alloy subjected to solid solution treatment into a cubic press, adjusting the pressure to 1-3GPa, heating to 180-200DEG C, maintaining the temperature for 120-150min, and carrying out power-off pressure-maintaining natural-cooling to room temperature. The method has the advantages of simple process, convenient operation, low cost and stable quality; and the hardness of the Al-Si alloy processed through the method is greatly improved, is 60-68% higher than that of the unprocessed Al-Si alloy, and is 8-13% higher than that of the Al-Si alloy processed through routine methods.

Description

technical field [0001] The invention belongs to the field of metal materials and relates to a method for improving the hardness of an aluminum-silicon alloy. Background technique [0002] Aluminum-silicon alloy has good castability, weldability, corrosion resistance and certain mechanical properties, and is one of the most widely used aluminum alloys. However, the alloy has low density, and sometimes its hardness cannot meet the performance requirements of some workpieces. Therefore, improving the hardness of Al-Si alloy has important practical significance. At present, the methods to improve the hardness of Al-Si alloy are mainly the optimization of alloy composition, purification treatment, refinement modification treatment and heat treatment (solution, aging treatment). The above-mentioned method is easy to be applied in industry, but it is still limited to improve the hardness of aluminum-silicon alloy. Contents of the invention [0003] The purpose of the present i...

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): C22F1/043
Inventor 张瑞军闫志刚郑春雷刘建华
Owner 南通东湖国际商务服务有限公司
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