摘要
本研究对低合金铬钼奥贝球铁等温转变规律及相应转变产物的显微组织进行了研究,建立了工艺-组织-性能间关系,进而实现向奥贝球铁材料设计的转变。本实验研究的奥贝球铁适宜的等温淬火温度范围是240～360℃;贝氏体形态丰富,在340℃以上等温得较多羽毛状上贝氏体,材料的冲击韧性较高;在300℃以下得较多下贝氏体,材料的强度、硬度较高;在300～340℃之间等温得上贝氏体、下贝氏体和颗粒贝氏体的混合组织,材料的综合性能好。
The austempering process of ductile iron has been studied in details and discovered how the phase transformation taking place from austenite to bainite with time and temperature to set up its own TTT curve, controlling its up-bainite gained over 340C with a higher toughness, more low-bainite gained below 300C with higher strengh and hardness and mixture of up-bainite, low-bainite and grainy bainite gained between 300~340C with good complex properties.
出处
《中国铸造装备与技术》
CAS
北大核心
2002年第4期7-9,共3页
China Foundry Machinery & Technology
