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SiC-Al3Ti enhanced aluminum-based composite material preparing method

A composite material and technology for reinforcing aluminum matrix, applied in the field of aluminum matrix composite materials, can solve the problems of easy agglomeration of SiC particles, easy burning of alloying element Mg and metamorphic element Sr, poor performance of aluminum matrix composite materials, etc., so as to reduce the interface energy. , The effect of promoting uniform distribution and grain refinement

Active Publication Date: 2019-08-16
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention overcomes the shortcomings of the prior art and provides a SiC-Al 3 Preparation method of Ti-reinforced aluminum matrix composites with the aim of improving the wettability between SiC particles and aluminum melt in favor of SiC and Al 3 The uniform distribution of the Ti composite reinforcement phase solves the problems in the prior art that the SiC particles are easy to agglomerate, the alloying element Mg and the metamorphic element Sr are easy to burn out, resulting in poor performance of the aluminum matrix composite material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Step 1: SiC-Al 3 Preparation of Ti composite powder prefabricated blocks:

[0024] 1) SiC powder is cleaned and subjected to high temperature oxidation at 850-950°C in a box furnace.

[0025] 2) Mix the SiC powder, Ti powder and Al powder in step 1 by ball milling in a planetary ball mill under vacuum conditions, the ball milling time is 16 hours, and the rotation speed is 250r / min.

[0026] 3) Press the composite powder in step 2 into a cylindrical prefabricated block by a tablet press. SiC-Al 3 The Ti composite powder prefabricated block includes 5% by mass of micron-sized SiC particles and 1% by mass of Al 3 Ti.

[0027] 4) Dry the prefabricated block in step 3 in a vacuum oven at 110°C for 5 hours.

[0028] Step 2: Preparation of high temperature melt:

[0029] 1) SiC-Al-Ti composite powder prefabricated block preheating: the preheating temperature is 300-400°C, and the preheating time is more than 1 hour.

[0030] 2) Melt pure aluminum accounting for 30% of ...

Embodiment 2

[0041] Step 1: SiC-Al 3 Preparation of Ti composite powder prefabricated blocks:

[0042] 1) The SiC powder is cleaned and subjected to high-temperature oxidation at 950 °C in a box furnace.

[0043] 2) Mix the SiC powder, Ti powder and Al powder in step 1 by ball milling in a planetary ball mill under vacuum conditions, the ball milling time is 8 hours, and the rotation speed is 300r / min.

[0044] 3) Press the composite powder in step 2 into a cylindrical prefabricated block by a tablet press. SiC-Al 3 The Ti composite powder prefabricated block includes 7% by mass of micron-sized SiC particles and 3% by mass of Al 3 Ti.

[0045] 4) Dry the prefabricated block in step 3 in a vacuum oven at 110°C for 4 hours.

[0046] Step 2: Preparation of high temperature melt:

[0047] 1) SiC-Al-Ti composite powder prefabricated block preheating: the preheating temperature is 350°C, and the preheating time is 3 hours.

[0048] 2) Melt pure aluminum accounting for 50% of the total melt ...

Embodiment 3

[0058] Step 1: SiC-Al 3 Preparation of Ti composite powder prefabricated blocks:

[0059] 1) The SiC powder is cleaned and subjected to high-temperature oxidation at 850 °C in a box furnace.

[0060] 2) Mix the SiC powder, Ti powder and Al powder in step 1 by ball milling in a planetary ball mill under vacuum conditions, the ball milling time is 10 hours, and the rotation speed is 200r / min.

[0061] 3) Press the composite powder in step 2 into a cylindrical prefabricated block by a tablet press. SiC-Al 3 The Ti composite powder prefabricated block includes 7.5% by mass of micron-sized SiC particles and 2.5% by mass of Al 3 Ti.

[0062] 4) Dry the prefabricated blocks in step 3 in a vacuum oven at 110°C for 10 hours.

[0063] Step 2: Preparation of high temperature melt:

[0064] 1) SiC-Al-Ti composite powder prefabricated block preheating: the preheating temperature is 400°C, and the preheating time is more than 1 hour.

[0065] 2) Melt pure aluminum accounting for 40% ...

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Abstract

The invention discloses a SiC-Al3Ti enhanced aluminum-based composite material preparing method, and relates to the technical field of aluminum-based composite materials. The problems that in the prior art, SiC particles are prone to being aggregated, the alloy element Mg and the metamorphic element Sr are prone to getting burning losses, and consequently the performance of an aluminum-based composite material is poor are solved. Specifically, high-temperature melt with a SiC-Al3Ti composite powder prefabricated block is prepared, the temperature of the high-temperature melt is 850-900 DEG C,low-temperature melt prepared through pure magnesium, an aluminum copper intermediate alloy and an aluminum strontium intermediate alloy is added in an alloy, the temperature of the low-temperature melt is 580-620 DEG C, then, the low-temperature melt is added in the high-temperature melt, and an aluminum-based composite material is obtained. Due to high-low-temperature mixed treatment, an Al3Ti intermetallic compound can be better formed at the high temperature so that good interface bonding can be kept between SiC and an aluminum base body, and base body grains are refined. According to themethod, the preparing technology is simple in operation, and the comprehensive performance of the aluminum-based composite material can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of aluminum-based composite materials, and in particular relates to a SiC-Al 3 Preparation method of Ti reinforced aluminum matrix composite material. Background technique [0002] Particle-reinforced metal-matrix composites, especially SiC particle-reinforced aluminum-matrix composites, have good comprehensive properties and have been used in aerospace, national defense, automobiles, and marine equipment. Poor wettability leads to reduced performance, which affects its wide use. In order to improve the interface bonding strength between SiC particles and the melt, and reduce the burning loss of alloying elements and modified elements, it is an important research direction to optimize the preparation method for composite material preparation. [0003] According to the investigation of existing technical literature, Chinese patent CN109022948A proposes a SiC particle reinforced aluminum matrix composite mat...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C32/00C22C1/03C22C1/10
CPCC22C21/00C22C32/0063C22C1/1015C22C1/1036C22C1/1047
Inventor 徐宏陈诚诚张文达毛红奎任霁萍
Owner ZHONGBEI UNIV
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