A method for preparing dispersion-strengthened iron-based material by ultrasonic dispersion method
An iron-based material and dispersion strengthening technology, applied in the field of powder metallurgy, can solve the problems of easy pollution of oxide dispersion-strengthened iron-based materials, easy agglomeration of oxides, complex control process, etc., to achieve superior performance, simple preparation process, and dispersion effect Good results
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Embodiment 1
[0033] Preparation of 0.5(wt)%TiO 2 Dispersion strengthened iron-based materials, the process is as follows:
[0034] (1) Under ultrasonic conditions, TiO with particle size less than or equal to 10nm 2 Raw material powder (anatase type), added to the ethanol-free solution, and ultrasonically oscillated for 15 minutes to make TiO 2 The powder is evenly dispersed, and a suspension liquid with a raw material powder concentration of 18g / L is obtained, and the frequency of the ultrasonic wave is 30kHz;
[0035](2) While maintaining ultrasonic conditions, use a funnel to lift and release the iron-based powder with a particle size of less than or equal to 150 μm from the bottom of the vessel at a uniform speed, and spread it layer by layer into the prepared suspension liquid until the iron-based powder and the liquid surface In parallel, the mixture is obtained; in the process of powder feeding, the frequency and power of the original ultrasonic wave are maintained, so that the so...
Embodiment 2
[0039] Preparation of 1% (wt) Y 2 o 3 Dispersion strengthened iron, the process is:
[0040] (1) Configure Y with a concentration of 36g / L 2 o 3 Ethanol solution, where Y 2 o 3 The particle size is less than or equal to 30nm, and the prepared solution is ultrasonically oscillated by an ultrasonic instrument for 15 minutes to make the nanometer Y 2 o 3 Uniform dispersion; ultrasonic frequency is 40kHz;
[0041] (2) While maintaining ultrasonic conditions, use a funnel to spread the iron-based powder with a particle size of less than or equal to 75 μm into the prepared suspension liquid layer by layer at a constant speed from the bottom of the vessel until the upper surface of the iron-based powder reaches the height of the liquid level and is in contact with the The liquid surface is parallel; keep the ultrasonic oscillation for 10 minutes; then gradually reduce the ultrasonic frequency and power until the ultrasonic is stopped;
[0042] (3) Put the mixture prepared in ...
Embodiment 3
[0047] Preparation of 0.5(wt)% Y 2 o 3 Dispersion strengthened iron, the process is:
[0048] (1) Under ultrasonic conditions, the particle size is less than or equal to -10nm Y 2 o 3 The raw material powder is added to the absolute alcohol liquid, and ultrasonically oscillated for 15 minutes to make Y 2 o 3 The powder is evenly dispersed, and a suspension liquid with a raw material powder concentration of 18g / L is obtained, and the frequency of the ultrasonic wave is 30kHz;
[0049] (2) While maintaining ultrasonic conditions, use a funnel to spread the iron-based powder with a particle size of less than or equal to 75 μm into the prepared suspension liquid layer by layer from the bottom of the vessel at a constant speed until the upper surface of the iron-based powder reaches the liquid level and Parallel to the liquid surface to obtain a mixture; in the process of powder feeding, the frequency and power of the original ultrasonic wave should be maintained, so that the ...
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