What is impact toughness?
Impact toughness is the ability to reflect the metal to the external impact load resistance, generally by the impact toughness (ak) and impact (Ak) said, the unit were J / cm2 and J (Joule). Impact toughness or impact test (referred to as "impact test"), due to the test temperature is divided into normal temperature, low temperature and high temperature impact test three; according to the specimen gap shape can be divided into "V" Shape notch impact test two.
Impact test: with a certain size and shape (10 & # 55; 55 mm) of the sample (the length of the middle of the "U" or "V" type gap, notch depth of 2mm) in the specified test machine by the impact The experiment of breaking the gap from the gap.
A, the impact of absorbing power Akv (u) - has a certain size and shape of the metal pattern, under the impact of the impact of the load absorbed by the work. The unit is Joule (J) or Kgf. M.