190> (2)Requirements 1)Understand the crystal structure,the process of metal crystallization,the general law of solid state transformation. 2)Master the general relationship between material component-structure-heat treatment,be able to make technology route of processing and heat treatment. 3)Understand usual metal materials and learn to how to choose them. Clue:relationship between component- structure-property(2) Requirements 1) Understand the crystal structure, the process of metal crystallization, the general law of solid state transformation. 2) Master the general relationship between material component-structure-heat treatment, be able to make technology route of processing and heat treatment. 3) Understand usual metal materials and learn to how to choose them. Clue: relationship between component￾structure-property