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How to solve the cracking issue when braze PDC cutters

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How to solve the cracking issue when braze PDC cutters

PDC cutters are playing an increasingly important role in coal mining and geological exploration. However, how are PDC cutters welded? Today, we will reveal how are PDCcutters welded.

Because the heating temperature of PDC, an important component of diamond bit, is limited (generally, it should not exceed 760℃ ~ 800℃), silver base filler metal, induction brazing or flame brazing are generally used in the welding of diamond bit.The strength of the weld depends on the structure and state of the material being connected, the brazing process and the PDC and matrix.

Design of the bonding surface before welding: including the roughness, geometric Angle, shape and position tolerance determination of the bonding surface of the PDC cutters support, and the bonding Angle of the PCD blade.The most basic idea is to realize single side welding and minimize the welding stress under the condition of ensuring the welding strength.Inspection of geometric dimensions: the assembly gap should be between 0.10 and 0.15mm, and the middle gap should not be larger than the surrounding gap.To remove the surface of the oxide skin and oil: sandblast after boiling clean, before welding with acetone clean.

Excessive flux and surface oxide should be cleaned immediately after bit welding.It is usually sandblasted and soaked in hot water.

The above points are the "big reveal" of the welding method of diamond chip bit we prepared for you today. I hope it will be of help to you. If you have any questions in the daily use of diamond chip bit, please feel free to contact us.

Pub Time : 2020-05-13 21:43:49 >> News list
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