The particular microstructure of bainite+austenite and the suitable distribution of ferrite and austenite in bainite are the main reason of good wear resistance matching high toughness.

• 贝氏体+奥氏体的显微组织结构及贝氏体中铁素体与奥氏体的分布特点，是其具有高耐磨性和良好韧性匹配的主要原因。