Rotation type dynamic continuous preparing method and device for (M1, M2)(CxN1-x) powder

Rotation type dynamic continuous preparing method and device for (M1, M2)(CxN1-x) powder

  • CN 104,987,075 A
  • Filed: 06/09/2015
  • Published: 10/21/2015
  • Est. Priority Date: 06/09/2015
  • Status: Active Grant
First Claim
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1. (M1, M2) (C xn 1-x) the rotary dynamic continuous production method of powder, described chemical formula (M1, M2) (C xn 1-x) in, M1 is the one in Ti, V, Cr, M2 is at least one in Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W, Mn, lanthanide series rare-earth elements, the quality of M1 accounts for 60% ~ 90% of M1 and M2 quality sum, and M1 and M2 is not identity element, x is 0.1 ~ 0.9, it is characterized in that processing step is as follows:

  • (1) prepare burdenPreparation (M1, M2) (C xn 1-x) raw material of powder is the compound powder of M1 and O, the compound powder of M2 and O and reductive agent, the quality of the compound powder of M1 and O accounts for 26.5 ~ 68.9% of raw material total mass, the quality of the compound powder of M2 and O accounts for 6.7 ~ 55.5% of raw material total mass, and the quality of reductive agent accounts for 15.5 ~ 29.5% of raw material total mass;

    Or preparation (M1, M2) (C xn 1-x) raw material of powder is M1 powder, the compound powder of M2 and O and reductive agent, the quality of M1 powder accounts for 20.5 ~ 81.7% of raw material total mass, the quality of the compound powder of M2 and O accounts for 13.0 ~ 63.2% of raw material total mass, and the quality of reductive agent accounts for 5.2 ~ 26% of raw material total mass;

    (2) batch mixing is with dryThe raw material that step (1) measures is put into ball mill, add grinding spheroid and wet grinding media carry out wet-milling, raw material is mixed, the add-on of wet grinding media is limited with raw material described in submergence and grinding spheroid, then sieving separating goes out to grind spheroid and obtains mixed slurry, (M1, M2) (C must be prepared by dry for gained mixed slurry xn 1-x) mixed powder of powder;

    (3) sinterSintering uses dynamic stoking device, sinters, operate as follows under open system under sintering or closed system;

    Sinter under open system;

    be at boiler tube the heeling condition of discharge port lower than opening for feed to be filled with nitrogen or nitrogen and argon gas in boiler tube mixed gas with the gas flow rate of 0.1 ~ 3L/min, then boiler tube is made to rotate and furnace tubing, when the temperature in boiler tube reaches temperature of reaction, step (2) gained mixed powder is sent in boiler tube continuously, reaction forming reactions product is completed with the form of spiral motion by boiler tube heating zone after mixed powder enters boiler tube, reaction product falls into collecting chamber, namely (M1, M2) (C is obtained after cooling xn 1-x) powder;

    Preparation (Ti, M2) (C xn 1-x) powder time, temperature of reaction is 1500 ~ 2000 DEG C;

    Preparation (Cr, M2) (C xn 1-x) powder or (V, M2) (C xn 1-x) powder time, temperature of reaction is 1000 ~ 1550 DEG C;

    Sinter under closed system;

    be in discharge port at boiler tube and make the pressure in boiler tube be 1 ×

    10 lower than the heeling condition of opening for feed by vacuumizing -1~ 1 ×

    10 -2pa, then mixed gas to the pressure in boiler tube passing into nitrogen or nitrogen and argon gas in boiler tube is normal pressure and makes boiler tube be the closed system with isolated from atmosphere, continue after make boiler tube rotate and furnace tubing, when the temperature in boiler tube reaches temperature of reaction, the mixed powder that step (2) obtains is sent in boiler tube continuously, reaction forming reactions product is completed with the form of spiral motion by boiler tube heating zone after mixed powder enters boiler tube, reaction product falls into collecting chamber, namely (M1, M2) (C is obtained after cooling xn 1-x) powder;

    Preparation (Ti, M2) (C xn 1-x) powder time, temperature of reaction is 1400 ~ 2000 DEG C;

    Preparation (Cr, M2) (C xn 1-x) powder or (V, M2) (C xn 1-x) powder time, temperature of reaction is 1000 ~ 1450 DEG C.

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