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.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
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。
关键词
高硼铸钢
淬火温度
硼化物
硬度
显微组织
high boron cast steel
quench temperature
boride
hardness
microstructure
