淬火温度对高硼铸钢显微组织和硬度的影响  

Effect of quenching temperature on microstructure and hardness of high boron cast steel

作　　者：蒋志强[1] 符寒光[2] 杨军[3] 王晋华[3] 

机构地区：[1]郑州航空工业管理学院工业工程系,河南郑州450015 [2]西安交通大学材料科学与工程学院,陕西西安710049 [3]西安建筑科技大学冶金工程学院,陕西西安710055

出　　处：《材料热处理学报》2007年第B08期158-160,共3页Transactions of Materials and Heat Treatment

基　　金：河南省高校杰出科研人才创新工程项目(2006KYCX022);河南省科技攻关计划(0624250005;0624260011);国家科技攻关引导项目(2005BA324C)资助。

摘　　要：研究淬火温度对含碳量小于0.4%和含硼量小于2.0%的高硼铸钢显微组织和硬度的影响。高硼铸钢铸态基体组织由珠光体和铁素体组成。淬火处理后,硼化物数量变化不明显,随着淬火温度升高,基体显微硬度和试样宏观硬度提高,淬火温度超过1000℃后,硬度略有降低。在900～1100℃内淬火,都可获得强韧性好的板条马氏体基体组织。高硼铸钢中的硼化物显微硬度超过1500HV,由Fe_2B和少量FeB组成。The effects of quenching temperature on the microstructure and hardness of high boron cast steel containing smaller than 0.4 wt.%C and smaller than 2.0 wt.%B were investigated. The as-cast matrix of high boron cast steel consists of the pearlite and ferrite. The borides on the matrix have no obvious change quenching at 900-1100℃. The micro-hardness of matrix and macroscopical hardness increase with the increase of quenching temperature. When the quenching temperature excels 1000℃, the hardness has a slight decrease. Under quenching at 900-1100℃, the matrix all transforms into the lath martensite having high strength and excellent toughness. The micro-hardness of borides excels 1500HV, which consists of Fe2B and small amount of FeB phase.

关 键 词：高硼铸钢 淬火温度 硼化物 硬度 显微组织 

分 类 号：TG113[金属学及工艺—物理冶金] TB333[金属学及工艺—金属学]