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

Preparation method of friction-reducing and wear-resistant hypereutectic aluminum-silicon alloy based on rare earth cerium modification

An aluminum-silicon alloy and rare-earth cerium technology is applied in the field of preparation of a new type of friction-reducing and wear-resistant hypereutectic aluminum-silicon alloy, which can solve the problems of inability to meet the friction and wear properties of the alloy, reduce the wear resistance of the alloy, etc., so as to improve the friction environment, The effect of increasing the degree of supercooling and enhancing the wear resistance

Inactive Publication Date: 2018-03-06
LANZHOU UNIVERSITY OF TECHNOLOGY
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the regularization of the Si phase morphology, the refinement of the size, and the uniformity of the distribution in the hypereutectic Al-Si alloy, although it is beneficial to optimize the friction environment of the alloy, the fine Si phase is distributed on the alloy matrix, which reduces the alloy's frictional environment. Wear resistance, still can not meet the requirements of the friction and wear performance of the alloy piston parts in service

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
  • Preparation method of friction-reducing and wear-resistant hypereutectic aluminum-silicon alloy based on rare earth cerium modification

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] Such as figure 1 As shown, the method for preparing a novel friction-reducing and wear-resistant hypereutectic aluminum-silicon alloy based on the modification of rare earth cerium provided by the embodiment of the present invention, the specific steps include:

[0022] S101: Raw material preparation: Prepare the required industrial pure aluminum, industrial crystalline silicon, pure copper and pure bismuth according to the composition requirements;

[0023] S102: Filler melting: put industrial pure aluminum and industrial crystalline silicon in a Si-C rod heating furnace and heat to 780°C~800°C, then add alloying materials copper and bismuth, and stir every 5 minutes until they are completely melted Insulate at 740°C~760°C for 10 minutes;

[0024] S103: Refining pouring: cool down the melt of S102, when the temperature of the melt drops to 700°C~750°C, put C 2 Cl 6 Wrap it with aluminum foil and press it into the alloy melt to stir and refine, remove impurities and ...

Embodiment 1

[0031] (1) Add aluminum ingots and industrial crystalline silicon into a Si-C rod crucible furnace with a furnace temperature of 780°C~800°C. After they are completely melted, add pure copper and pure bismuth, stir every 5 minutes, and 740°C~760°C for 10 minutes; (2) When the melt temperature drops to 700°C~750°C, put the aluminum foil wrapped C 2 Cl 6 Press into the melt to stir and refine, remove impurities and slag; (3) When the temperature of the melt drops to 710°C~720°C, pour the melt into a metal mold to solidify and form, and prepare Al-17Si-3Cu-2Bi Master alloy; (4) Melt the master alloy prepared in step (3) in a crucible boiler at 780°C to 800°C, then add rare earth cerium with a mass fraction of 0.2% to the alloy melt, and stir once every 5 minutes, And heat preservation and deterioration at 760°C~780°C for 20min; (5) Repeat the operation process of step (2) and step (3) to prepare a new anti-friction and wear-resistant hypereutectic aluminum-silicon alloy based on...

Embodiment 2

[0033] Repeat the steps (1) (2) (3) in Example 1 to obtain the master alloy of Al-17Si-3Cu-2Bi, and then melt the master alloy in a crucible boiler at 780 ° C ~ 800 ° C, adding a mass fraction of 0.6% Rare earth cerium is modified, adopt the same modification temperature and holding time as step (4) in Example 1, and cast it when the melt temperature drops to 710 ° C ~ 720 ° C, and prepare a new type of anti-friction and wear resistance based on rare earth cerium modification Hypereutectic Al-Si alloy.

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 novel damping wear-resisting hypereutectic aluminum-silicon alloy preparing method based on rare earth cerium modification. The method comprises the steps of carrying out raw material preparing, padding melting and refining casting, obtaining an intermediate alloy, adding modification agent rare earth cerium according to the specific mass fraction, and carrying out stirring at a time every interval of 5 min until the intermediate alloy added with the medication agent rare earth cerium is completely molten at the temperature of 760 DEG C to 780 DEG C and is subject to heat preservation for 20 min; carrying out repeated refining casting operation on the a melt obtained after complete melting of the intermediate alloy added with the modification agent rare earth cerium, carrying out casting, and obtaining the rare earth aluminum-silicon alloy. According to the novel damping wear-resisting hypereutectic aluminum-silicon alloy preparing method based on rare earth cerium modification, alloying elements of Cu and Bi are adopted, and are dissolved in the aluminum-silicon alloy melt in a solid manner, in the casting and solidifying process of a metal mold, a second phase of a hard point is formed and distributed on an alloy base body, the effect of second phase reinforcing is achieved, and wear resistance of an alloy material is ensured.

Description

technical field [0001] The invention belongs to the technical field of preparation of a friction-reducing and wear-resistant hypereutectic aluminum-silicon alloy, and relates to a method for preparing a novel friction-reducing and wear-resistant hypereutectic aluminum-silicon alloy under the modification of rare earth cerium. Background technique [0002] Studies have shown that 60% of the fuel of a car is consumed by its own weight. If the weight of the car is reduced by 10%, the fuel consumption of the car can be reduced by 6% to 8%, and the fuel efficiency can be increased by about 5.5%. 2.5 kg CO 2 emissions. The hypereutectic aluminum-silicon alloy, which is an ideal substitute for traditional cast iron, is used in the production of automotive engine pistons, cylinder heads, and other parts due to its good casting properties, low thermal expansion coefficient, and good wear and corrosion resistance. , in order to achieve the purpose of reducing the weight of the car a...

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): C22C21/04C22C1/03C22C1/06
CPCC22C1/026C22C1/03C22C1/06C22C21/04
Inventor 李庆林李进宝李斌强张朝奋兰晔峰
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com