摘要
设计了一种新型含碳化物马氏体球墨铸铁材料,并对该材料进行了不同奥氏体化温度的热处理。结果表明：经不同温度奥氏体化后,新型铸铁的组织均为细针状马氏体＋孤立分布的硼-铬碳化物＋球状石墨组织。奥氏体化温度在820～890℃范围变化时,随奥氏体化温度的升高,该铸铁的硬度增大,冲击韧度减小;奥氏体化温度高于890℃时,硬度和冲击韧度均减小。奥氏体化温度为890℃时,试验铸铁硬度和冲击性能达到良好的匹配。
A new martensitic ductile cast iron containing carbides was designed, and the cast iron was heat treated at different austenite temperatures. The results show that after austenitizing at different temperatures, the microstructure of the cast iron consist of acicular martensite, individuals distributed boron-chromium-carbon compounds, and global graphite. When austenitizing temperature changes in the range of 820-890 ℃, with autenitizing temperature increasing, the impact toughness decreases and the hardness increases gradually. When autenitizing temperature is above 890 ℃, the hardness and impact toughness both decrease, and at 890 ℃, the hardness and impact toughness has a better match.
出处
《金属热处理》
CAS
CSCD
北大核心
2016年第9期128-130,共3页
Heat Treatment of Metals
基金
河北省高等学校科学技术研究项目(Z2014092)
关键词
新型含碳化物马氏体球墨铸铁
奥氏体化温度
组织
性能
a new martensitic ductile cast iron containing carbides
austenitizing temperature
microstructure
properties
