A kind of diamond micropowder-copper base alloy composite particle and preparation method thereof
A technology of diamond micropowder and copper-based alloy, applied in metal processing equipment, chemical instruments and methods, abrasives, etc., can solve the problems of unstable performance of diamond micropowder abrasive tools, segregation of diamond micropowder, etc., to improve physical/mechanical properties, prevent The effect of macrosegregation
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Embodiment 1
[0033] This embodiment provides a method for preparing diamond micropowder-copper-based alloy composite material particles, comprising the following steps:
[0034] (1) Mix tin, titanium and copper at a mass ratio of 25:0.3:74.7 and heat to 980°C to obtain an alloy melt;
[0035] (2) The alloy melt is poured into the tundish, so that the melt flows out from the Φ5mm aperture at the bottom of the tundish to become an alloy stream, and the flow rate of the alloy stream is controlled by a plunger valve to be 3kg / min. The alloy stream enters the atomization chamber of nitrogen atmosphere;
[0036] (3) in the atomization chamber of nitrogen atmosphere, the diamond micropowder that particle diameter is 20 μ m is injected into described alloy flux by flow rate 55g / min, obtains mixed flux;
[0037] (4) spray the mixed stream with 0.2MPa high-pressure nitrogen to make the mixed stream become a droplet, and then use 10 3 The cooling rate of K / sec is rapidly cooled to make solidified p...
Embodiment 2
[0040] This embodiment provides a method for preparing diamond micropowder-copper-based alloy composite material particles, comprising the following steps:
[0041] (1) Mix tin, tungsten and copper in a mass ratio of 5:0.1:94.9 and heat to 950°C to obtain an alloy melt;
[0042] (2) The alloy melt is poured into the tundish, so that the melt flows out from the Φ5mm aperture at the bottom of the tundish to become an alloy stream, and the flow rate of the alloy stream is controlled by a plunger valve to be 12kg / min. The alloy stream enters the atomization chamber of nitrogen atmosphere;
[0043] (3) in the atomization chamber of nitrogen atmosphere, the diamond micropowder that particle size is 1 μ m is injected into described alloy flux by flow rate 422g / min, obtains mixed flux;
[0044] (4) spray the mixed stream with the high-pressure nitrogen of 2MPa to make the mixed stream become a droplet, and then use 10 5 The cooling rate of K / sec is rapidly cooled to make solidified ...
Embodiment 3
[0047] This embodiment provides a method for preparing diamond micropowder-copper-based alloy composite material particles, comprising the following steps:
[0048] (1) Mix tin, molybdenum and copper in a mass ratio of 40:2:58 and heat to 1200°C to obtain an alloy melt;
[0049] (2) The alloy melt is poured into the tundish, so that the melt flows out from the Φ5mm aperture at the bottom of the tundish to become an alloy stream, and the flow rate of the alloy stream is controlled by a plunger valve to be 6kg / min. The alloy stream enters the atomization chamber in the argon atmosphere;
[0050] (3) in the atomization chamber of argon gas atmosphere, the diamond micropowder that particle diameter is 50 μ m is injected into described alloy flux by flow rate 79g / min, obtains mixed flux;
[0051] (4) spray the mixed stream with 1MPa high-pressure argon to make the mixed stream become a droplet, and then spray the mixed stream with 10 4 The cooling rate of K / sec is rapidly cooled ...
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