Note: Hardening Stainless Steel Surgical Knife Blades

Objective:

Harden a 4"(101.6mm) section of a Stainless Steel surgical blade measuring 7" (177.8mm) long. Hardness should be 48 to 53 Rockwell C on the blade after processing. 

End Product:

Stainless Steel surgical blade

Equipment:

Ambrell 1 kW induction heating system equipped with a remote workhead including one (1) capacitor equaling 1.2‚ μF An induction heating coil designed and developed specifically for this application.

Materials:

420 Stainless Steel Surgical Blades measuring 7"(177.8mm) long, 1/4"(6.35mm) wide at the shank, and 0.085" (2.2mm) thick at the blade.

Temperature:

1850 °F(1010 °C)

Frequency:

365 kHz

Testing:

A two-turn helical coil with an internal quartz tube designed to scan the length of the blade is used to heat the blade to 1850 °F (1010 °C) to achieve the desired hardness.

Benefits:

  • Flameless process

  • Improved production rate

  • Consistent & repeatable results 

Hardening Stainless Steel Surgical Knife Blades

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