nitrogen austenite

例句：

1. 1.The steel was heated to a high temperature before being quenched in order to produce austenite.
   为了产生奥氏体，钢材在高温下被加热后迅速冷却。
2. 2. Austenite is a type of carbon-rich phase that occurs naturally in certain metals and alloys.
   奥氏体是一种富含碳的相，自然存在于某些金属和合金中。
3. 3.During the heat treatment process, the steel undergoes a transformation from austenite to martensite.
   热处理过程中，钢铁从奥氏体转变为马氏体。