Fatigue resistance

  • 03-Sep-2008 01:20 EDT
RGB_prod 11 autofrettage.jpg

Aquarese has developed high-pressure processes for diesel injection systems such as common rails, tubes, and injectors, integrating those processes in automated lines including machines for deburring, flushing, cleaning, and the company’s autofrettage technique. The technique increases the fatigue resistance behavior of hollow mechanical parts on thick-walled metal tubes or pipes including common rails, pipes, and injectors for diesel-injection systems to improve the durability of the part by creating a compressive residual stress at the bore. The part briefly is subjected to a pressure of 43,000 to 116,000 psi (3000 to 8000 bars), generating a plastic distortion of the inside wall. After the pressure is removed, the elastic recovery of the outer wall puts the inner wall into compression, providing a residual compressive stress.
For more information, visit 2008 SAE ComVEC booth 600

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