Research progress and application of austenite-bainite nodular-iron

This article reviewed the birth of austenite-bainite nodular-iron in China in the late 1960s.The research progress,technology and application were introduced.The essential differences of upper bainite and lower bainite and strengthening-toughening mechanism between the nodular-iron and steel were discussed in detail.The new ideas of the strengthening-toughening mechanism at the interface of graphite and metal substrate G-M in cast iron were introduced.The experience of the austenite-bainite nodular-iron hammer developed by the authors was presented.