Sintering process of diamond compact for petroleum drill bit
A technology for diamond composite sheets and drill bits, which is used in drill bits, metal processing equipment, earth-moving drilling, etc., can solve the problems of delamination, affecting the heat resistance of products, etc., so as to improve wear resistance, shorten sintering time, and reduce the degree of wear. Effect
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Embodiment 1
[0028] A diamond composite sheet sintering process for an oil drill bit, comprising the following steps:
[0029] S1 raw material pre-assembly: Put the diamond powder sprayed with 0.01mm bond and the cemented carbide substrate I in the shielding cup to form an assembly, ready for use;
[0030] Primary sintering of S2 diamond composite sheet: Send the assembly in step S1 into a high-pressure sintering synthesis chamber, sinter in a high-pressure sintering synthesis chamber with a temperature of 1400°C and a pressure of 5.0GPa for 4 minutes, and remove the cemented carbide matrix I to obtain a diamond composite The crude product is ready for use;
[0031] S3 Rough finished product processing: Roughly grind the rough finished diamond composite sheet with a ceramic grinding wheel, and then finely grind it with a resin grinding wheel to make the thickness the same as the finished product, and the outer diameter is 0.2mm larger than the finished product;
[0032] Secondary sinterin...
Embodiment 2
[0039] A diamond composite sheet sintering process for an oil drill bit, comprising the following steps:
[0040] S1 raw material pre-assembly: Put the diamond powder sprayed with 0.02mm bond and the cemented carbide substrate I in the shielding cup to form an assembly, ready for use;
[0041] S2 diamond composite sheet primary sintering: Send the assembly in step S1 into a high-pressure sintering synthesis chamber, sinter in a high-pressure sintering synthesis chamber with a temperature of 1420°C and a pressure of 5.0GPa for 6 minutes, and remove the cemented carbide matrix I to obtain a diamond composite The crude product is ready for use;
[0042] S3 Rough product processing: Roughly grind the rough product of the diamond composite sheet with a ceramic grinding wheel, and then finely grind it with a resin grinding wheel to make the thickness the same as the finished product, and the outer diameter is 0.3mm larger than the finished product;
[0043] Secondary sintering of S...
Embodiment 3
[0050] A diamond composite sheet sintering process for an oil drill bit, comprising the following steps:
[0051] S1 raw material pre-assembly: Put the diamond powder sprayed with 0.02mm bond and the cemented carbide substrate I in the shielding cup to form an assembly, ready for use;
[0052] S2 diamond composite sheet primary sintering: Send the assembly in step S1 into a high-pressure sintering synthesis chamber, sinter in a high-pressure sintering synthesis chamber with a temperature of 1450°C and a pressure of 5.0GPa for 5 minutes, and remove the cemented carbide matrix I to obtain a diamond composite The crude product is ready for use;
[0053]S3 Rough product processing: Roughly grind the rough product of the diamond composite sheet with a ceramic grinding wheel, and then finely grind it with a resin grinding wheel to make the thickness the same as the finished product, and the outer diameter is 0.3mm larger than the finished product;
[0054] Secondary sintering of S4...
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