A kind of preparation method of cemented carbide and cemented carbide prepared by the method
A cemented carbide and alloy powder technology, applied in the field of alloy materials, can solve the problems affecting the normal progress of the project, the cemented carbide is prone to wear and fracture, and cannot meet the development needs, etc., and achieves the effect of improving the purity and reducing the introduction of impurities.
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[0027] see figure 1 , figure 1 It is a flowchart of the preparation method of cemented carbide of the present invention. The preparation method of the present invention at least comprises the following steps:
[0028] S1, using Y(NO 3 ) 3 ·6H 2 O, (NH 4 ) 6 Mo 7 o 24 4H 2 Precursor powder prepared from O and WC-Co alloy powder;
[0029] S2. Calcining the precursor powder in a hydrogen atmosphere, cooling and grinding to obtain WC-Co-Y 2 o 3 -Mo mixed powder;
[0030] S3, the WC-Co-Y 2 o 3 -Mo mixed powder sintered to prepare WC-Co-Y 2 o 3 - Mo cemented carbide.
[0031] see figure 2 , figure 2 for figure 1 The flow chart of preparing the precursor powder in step S1 specifically includes the following steps:
[0032] S11, set Y(NO 3 ) 3 ·6H 2 O and (NH 4 ) 6 Mo 7 o 24 4H 2 O dissolved in deionized water;
[0033] S12. Add WC-Co powder into the above solution, and stir at 120-140° C. until the water in the solution is evaporated to dryness;
[00...
Embodiment 1
[0054] WC-Co-Y prepared in this example 2 o 3 -Y in Mo cemented carbide 2 o 3 0.8 wt%, Mo 2.7 wt%, and WC-Co 96.5 wt%.
[0055] The preparation process is as follows: first according to the Y in the cemented carbide 2 o 3 The content of , Mo and WC-Co is calculated according to the formula (1) and formula (2) to prepare the required Y(NO 3 ) 3 ·6H 2 O, (NH 4 ) 6 Mo 7 o 24 4H 2 The amount of O and WC-Co should be weighed according to the calculated amount.
[0056] 1. Preparing the precursor: the weighed Y(NO 3 ) 3 ·6H 2 O, (NH 4 ) 6 Mo 7 o 24 4H 2 O and C 16 h 22 N 4 o 3 Add it into a beaker filled with deionized water, place it in a constant temperature water bath at 50°C and stir until the solids are completely dissolved, and continue stirring until the solution is colorless; then add the weighed WC-Co powder and magnetic rotor into the beaker, and then add The beaker was heated in a magnetic stirrer, and the heating temperature was set to 120°C. Aft...
Embodiment 2
[0061] WC-Co-Y prepared in this example 2 o 3 -Y in Mo cemented carbide 2 o 3 1.0 wt%, Mo 3.5 wt%, and WC-Co 95.5 wt%.
[0062] The preparation process is as follows: first according to the Y in the cemented carbide 2 o 3 The content of , Mo and WC-Co is calculated according to the formula (1) and formula (2) to prepare the required Y(NO 3 ) 3 ·6H 2 O, (NH 4 ) 6 Mo 7 o 24 4H 2 The amount of O and WC-Co should be weighed according to the calculated amount.
[0063] 1. Preparing the precursor: the weighed Y(NO 3 ) 3 ·6H 2 O, (NH 4 ) 6 Mo 7 o 24 4H 2 O and C 16 h 22 N 4 o 3 Add it into a beaker filled with deionized water, place it in a constant temperature water bath at 50°C and stir until the solids are completely dissolved, and continue stirring until the solution is colorless; then add the weighed WC-Co powder and magnetic rotor into the beaker, and then add The beaker was heated in a magnetic stirrer, and the heating temperature was set at 130°C. Aft...
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