How to choose a insert for machining a steel part with a hardness of HRC58-62 after quenching?

Most of the quenched steel parts hardness are above HRC58, showing difficult to process. In the past, the grinding process was generally used, but there were problems such as low processing efficiency, the need to add cutting fluid, and environmental pollution. Most factories now use the new car-grinding process for processing. It has the advantages of high efficiency and low cost.

• Turning instead of grinding originally refers to the use of turning technology as the final processing or finishing of metal surface treatment, and the final effect can reach the surface finish processed by the grinding machine, thereby replacing the grinding process. The use of turning instead of grinding affects the service life of the tool due to the high hardness of the material, high cutting force and cutting temperature. This requires that the tool for hard turning has better heat resistance and wear resistance; at the same time, the machine tool system must have sufficient system rigidity and precision.

  
  

• Grade SBH170 of CBN inserts are developed based on quenched steel parts, and are developed with new materials. They have the characteristics of high hardness and good high temperature resistance. They are the best tool solution for processing quenched hardness HRC58-62. It can meet continuous and intermittent processing conditions. For the intermittent gears after hot hard turning, the customer originally used other brands of CBN tools, which are low in efficiency and not wear-resistant. The diameter of the workpiece is 60mm, and the number of machining is 225 pieces. 150% increase. The cost per piece is reduced by 10% compared with the original, and the processing efficiency is increased by 15%.