【摘要】 通过对高碳稀土贝氏体钢组织和性能的研究表明：高碳稀土贝氏体钢空冷条件下得到以贝氏体为主的Ｂ／Ｍ复相组织，其中马氏体为板条马氏体和孪晶马氏体的混和组织；而贝氏体为变态下贝氏体组织。实验用钢空冷后经２５０～３００℃回火时具有较好的强韧配合，当回火温度超过３００℃时，产生显著的回火脆性。更多还原

【Abstract】 The study of microstructure and properties of high carbon rare earth bainite steel after heat treatment shows: Under air-cooling conditions,high carbon rare earth bainite steel has B/M duplex microstructure,in which martensite consists of lath martensite and twin martensite,and bainite appears abnormal low bainite microstructure.After air-cooling and tempering under 250℃～300℃,the steel exhibits a best strength-toughness combination, Tempering over 300 ℃,tempering brittleness will occur.更多还原