Impact Test of High Tensile Mn-Si Steels by 1500Kg-M Large Charpy Testing Machine

Abstract

The effects of impact loading on the transition temperatures of notched or unnotched bead bend specimens were investigated with five high tensile steels and the following conclusions were obtained:
1) With unnotched bead bend specimens the absorbed energies were increased and the transition temperatures were decreased by impact loading.
2) The energy transition temperatures of notched bend specimens of base metals were increased considerably by impact loading, and these specimens showed completely brittle fractures in the temperature range of room temperature to -70°C.
3) The rating of notch toughness of the steels by notched bend impact test was remarkably different from that by V-Charpy impact test.