A kind of high temperature resistant aluminum matrix composite material and its preparation method and application
An aluminum-based composite material and composite material technology, applied in the field of high-temperature-resistant aluminum-based composite materials and their preparation, can solve problems such as softening of ordinary aluminum alloys, achieve low production costs, high-temperature wear resistance and yield strength, and no brakes noise effect
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Embodiment 1
[0027] 1. A preparation method of a high temperature resistant aluminum matrix composite material.
[0028] A high temperature resistant aluminum matrix composite material is composed of the following components in mass fractions: 10% iron, 8% silicon, 1.5% nickel, and 80.5% aluminum. The preparation method of the high temperature resistant aluminum matrix composite material includes the following steps.
[0029] Step 1. Preparation of pre-alloyed raw materials by spraying method: adding iron, silicon and nickel to the aluminum melt, melting at high temperature, and spraying it into powder by gas atomization.
[0030] Step 2. Mechanical alloying: The pre-alloyed raw material obtained in Step 1 is ball-milled in a mixer for more than 72 hours.
[0031] Step 3. The powder obtained in step 2 is vacuum-hot pressed in a steel mold, and then sintered. The vacuum degree is -0.1MPa, and the pressure is 250kg / cm at 0-560℃ 2 , the pressure is 350kg / cm at 560-625℃ 2 . The sintering t...
Embodiment 2
[0039] A high temperature resistant aluminum matrix composite material is composed of the following components in mass fractions: 9% iron, 7% silicon, 1.7% nickel, and 82.3% aluminum. The preparation method of the high temperature resistant aluminum matrix composite material includes the following steps.
[0040] Step 1. Preparation of pre-alloyed raw materials by spraying method: adding iron (or iron alloy) to the aluminum melt, melting at high temperature, and spraying it into powder by gas atomization.
[0041] Step 2. Mechanical alloying: The pre-alloyed raw material obtained in Step 1 is ball-milled in a mixer for more than 72 hours.
[0042] Step 3. The powder obtained in step 2 is vacuum-hot pressed in a steel mold, and then sintered. The vacuum degree is -0.1MPa, and the pressure is 250kg / cm at 0-560℃ 2 , the pressure is 350kg / cm at 560-625℃ 2 . The sintering temperature is 660-750° C., and the sintering time is 40-60 min (constant temperature and pressure).
[0043]...
Embodiment 3
[0045] A high temperature resistant aluminum matrix composite material is composed of the following components in mass fractions: 11% iron, 9% silicon, 1.8% nickel, and 78.2% aluminum. The preparation method of the high temperature resistant aluminum matrix composite material includes the following steps.
[0046] Step 1. Preparation of pre-alloyed raw materials by spraying method: adding iron, silicon and nickel to the aluminum melt, melting at high temperature, and spraying it into powder by gas atomization.
[0047] Step 2. Mechanical alloying: The pre-alloyed raw material obtained in Step 1 is ball-milled in a mixer for more than 72 hours.
[0048] Step 3. The powder obtained in step 2 is vacuum-hot pressed in a steel mold, and then sintered. The vacuum degree is -0.1MPa, and the pressure is 250kg / cm at 0-560℃ 2 , the pressure is 350kg / cm at 560-625℃ 2 . The sintering temperature is 660-750° C., and the sintering time is 40-60 min (constant temperature and pressure).
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