Dispersion strengthened platinum rhodium and platinum composite material and preparation method thereof
A technology of dispersion strengthening and composite materials, applied in the field of metal materials, can solve the problems of forging and strengthening of platinum utensils, and achieve the effects of low volatility, saving usage and prolonging life.
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[0043] Concretely, the preparation method of dispersion strengthened platinum-rhodium and platinum composite material comprises the following steps:
[0044] 1. Preparation of dispersion strengthened platinum rhodium powder
[0045] 1.1. Ingredients: by weight percentage, 0.01-0.06% dispersant, 1-30% rhodium, and the rest are platinum materials;
[0046] 1.2. Induction melting: Melting rhodium and platinum materials in an induction melting furnace, controlling the melting temperature at 1800-2100°C and frequency at 3-100KHz, and performing degassing operations, and then casting platinum-rhodium ingots in molds;
[0047] 1.3 Vacuum melting: Fully melt the dispersant and platinum-rhodium ingot under the conditions of vacuum degree <10Pa, temperature 1800-2100°C, frequency 8-100KHz to obtain liquid alloy;
[0048] 1.4. Casting: Cast the liquid alloy obtained in 1.3 under inert gas, and the casting temperature is 1800-2100°C;
[0049] 1.5. Powder making: making the material obta...
Embodiment 1
[0081] In this embodiment, the ratio of platinum powder and dispersion-strengthened platinum-rhodium powder is 1:1. In actual production, the ratio of the two can be as high as 95:5 according to demand.
[0082] 1. Ingredients: dispersion strengthened platinum-rhodium powder: 0.06% dispersant, 10% rhodium, and the balance is platinum ingot with a purity of more than 99.9%; platinum powder: platinum ingot with a purity of more than 99.9%;
[0083] 2. Induction melting: Melting platinum ingots and rhodium in an induction melting furnace at a temperature of 2000°C, frequency of 30KHz, melting time of 2 hours, degassing, and casting platinum-rhodium ingots in molds; The platinum ingot is smelted through an induction melting furnace, the frequency can be selected at 30KHz, the smelting temperature is 2000°C, and the smelting time is 2 hours to obtain platinum liquid metal;
[0084] 3. Vacuum smelting: put the dispersant and platinum-rhodium ingot into the vacuum smelting furnace fo...
Embodiment 2
[0097] In this embodiment, the ratio of platinum powder to dispersion-strengthened platinum-rhodium powder is 1:4. In actual production, the ratio of the two can be as high as 95:5 according to demand.
[0098] 1. Ingredients: dispersion strengthened platinum-rhodium powder: 0.03% dispersant, 10% rhodium, and the balance is platinum ingot with a purity of more than 99.9%; platinum powder: platinum ingot with a purity of more than 99.9%;
[0099] 2. Induction smelting: Melt platinum ingots and rhodium in an induction melting furnace at a temperature of 1950°C, a frequency of 60KHz, and a smelting time of 1 hour, degassing, and cast platinum-rhodium ingots in molds. The platinum ingot is smelted through an induction melting furnace, the frequency can be selected at 30KHz, the smelting temperature is 1950°C, and the smelting time is 1 hour to obtain platinum liquid metal;
[0100] 3. Vacuum smelting: Put the dispersant and platinum-rhodium ingot into the vacuum smelting furnace for...
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