High-strength anti-fatigue in-situ nano strengthening aluminum alloy and die casting method thereof

An anti-fatigue, aluminum alloy technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of strong plasticity, low anti-fatigue performance, can not meet the high strength, anti-fatigue, high damping of high-performance engine parts, etc. Guarantee the effect of die-casting performance, good die-casting performance, high-strength anti-fatigue damping performance

Active Publication Date: 2017-10-20
JIANGSU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing typical aluminum alloy AlSi9Cu3 for die-casting has low strong plasticity and fatigue resistance, and especially cannot meet the technical requirements of high-performance engine parts for its high strength, fatigue resistance and high damping. Composition control and in-situ nano-strengthening, combined with the optimized nonlinear high-pressure die-casting method, can increase the content of alloy precipitates, rounding and refining, and at the same time realize the in-situ nano-ceramic reinforcement strengthening in the grain and grain boundary, significantly improving Strong Plasticity, Fatigue Resistance and Damping Properties of Die Casting Products

Method used

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  • High-strength anti-fatigue in-situ nano strengthening aluminum alloy and die casting method thereof
  • High-strength anti-fatigue in-situ nano strengthening aluminum alloy and die casting method thereof

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Experimental program
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Effect test

Embodiment 1

[0023] Using Al-10Zr, Al-10B, Al-20Er, Al-20Fe, Al-10Mn master alloys and pure Ni, pure Mg, pure Zn, and AlSi9Cu3 as raw materials, the optimized nonlinear high pressure die-casting technology is used to prepare automobile engine reduction Tremor bracket.

[0024] Transfer the melted 500Kg commercial AlSi9Cu3 alloy (760°C) into an intermediate holding furnace, then add Al-10Zr and Al-10B master alloys into the holding furnace and heat up to 850°C, while using a graphite stirring rotor to stir the melt to promote the alloy Mix thoroughly, keep the temperature for 15min, then cool the alloy to 750℃ and keep it warm; add Al-20Er, Al-20Fe, Al-10Mn, and pure Ni into the melt, stir and keep for 15min, then make the powder with particle size less than 500μm The complex refining agent is blown into the melt with inert gas through the hollow channel of the graphite rotor, and the melt is refined and degassed to remove the slag generated during the high-temperature melting and reaction of ...

Embodiment 2

[0028] Using Al-10Zr, Al-5B, Al-10Er, Al-10Fe, Al-10Mn master alloys and pure Ni, pure Mg, pure Zn, and AlSi9Cu3 as raw materials, the optimized nonlinear high pressure die-casting technology is used to prepare automobile engine reduction Vibration shell (the shell structure is complex and difficult to fill and exhaust gas, usually reduce Mg content, increase die-casting pressure, improve die-casting performance and yield).

[0029] Transfer the melted 500Kg commercial AlSi9Cu3 alloy (750°C) into an intermediate holding furnace, then add Al-10Zr and Al-5B master alloys into the holding furnace and raise the temperature to 840°C, while using a graphite stirring rotor to stir the melt to promote the alloy Mix thoroughly, hold time for 10min, then cool the alloy to 740℃ and keep it warm; add Al-10Er, Al-10Fe, Al-10Mn, and pure Ni into the melt, stir and keep for 10min, then make the powder with particle size less than 500μm The complex refining agent is blown into the melt with iner...

Embodiment 3

[0033] Using Al-10Zr, Al-5B, Al-20Er, Al-20Fe, Al-5Mn master alloys and pure NIi, pure Mg, pure Zn, and AlSi9Cu3 as raw materials, using optimized nonlinear high pressure die casting technology to prepare automobile engine oil pumps case.

[0034] Transfer the melted 500Kg commercial AlSi9Cu3 alloy (780℃) into an intermediate holding furnace, then add Al-10Zr and Al-5B master alloys into the holding furnace and raise the temperature to 860°C, while using a graphite stirring rotor to stir the melt to promote the alloy Mix thoroughly, hold time for 15min, then cool the alloy to 750℃ and keep it warm; add Al-20Er, Al-20Fe, Al-50Mn and pure Ni into the melt, stir and hold for 10min, then refine the ultra-fine powder The inert gas for the agent is blown into the melt through the hollow channel of the graphite rotor, and the melt is refined and degassed to remove the slag and hydrogen dissolved in the melt during high-temperature smelting and reaction of the alloy. The refining time is...

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Abstract

The invention relates to an aluminum matrix composite, in particular to high-strength anti-fatigue in-situ nano strengthening aluminum alloy and a die casting method thereof. In-situ nano strengthening and alloy component control are conducted, and an optimized nonlinear high-pressure die casting process is combined, so that the die casting is obtained. With the help of the scale effect, the interface effect and the heterogeneous nucleation effect of an in-situ nano ZrB2 reinforcement and a nano Al3Er precipitated phase, the strength, the anti-fatigue performance and the damping performance of the alloy are significantly improved; at the same time, the content of the elements Mg, Zn and Fe is increased, the elements Mn and Ni are introduced, the strengthening phase content is increased, the high strength is obtained, meanwhile, Al-Fe and other harmful coarse precipitated phases are effectively refined and rounded, and the good die casting performance of the alloy is ensured; and thus, a component produced through the high-strength anti-fatigue in-situ nano strengthening aluminum alloy and the die casting method thereof has the characteristics of being high in strength, plasticity, anti-fatigue performance and damping performance, and good in die casting performance.

Description

Technical field [0001] The invention relates to an aluminum-based composite material, in particular to a high-strength anti-fatigue in-situ nano-strengthened aluminum alloy and a die casting method thereof. Background technique [0002] With the development of economy and society, cars have gradually entered the homes of ordinary people and become essential tools for people to travel and live. Statistics from the China Association of Automobile Manufacturers show that in 2016, Chinese brand passenger vehicles sold 10.5286 million units, an increase of 20.50% year-on-year. The engine is the heart of the automobile, and the high efficiency, low cost and high performance of its key components have become the core of major automobile manufacturers to enhance their product competitiveness. [0003] High-pressure casting has the advantages of high production efficiency, good economy, high casting precision, and good surface finish, gradually replacing high-cost low-pressure, gravity cas...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C32/00C22C1/10B22D17/00
CPCC22C21/02B22D17/00C22C1/1036C22C32/0073C22C1/1052C22C1/1073B22D21/007B22D21/04C22C1/0416C22C1/1068B22F2999/00B22F1/07
Inventor 赵玉涛怯喜周陈刚殷来大刘海陈飞吴斌
Owner JIANGSU UNIV
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