摘要
采用等离子体渗氮技术对铸铁材料进行氮化处理,研究了渗氮前后铸铁的组织和性能变化。结果表明,当渗氮温度不变,保温时间为10～12 h时,渗层深度和显微硬度随着保温时间的延长而增大。保温时间不变,渗氮温度为560～600℃时,渗层深度和显微硬度随温度升高先增大后减小。在580℃渗氮时,铸铁的组织主要为γ′相和ε相,硬度值达到最大值。
Plasma nitriding technology was used to treat cast iron, the changes in the microstructure and properties of cast iron before and after nitriding were studied. The results show that the depth and microhardness of the nitriding layer increase with the increase of holding times when the nitriding temperature is constant. And the depth and microhardness of the nitriding layer increase first and then decrease with the increase of holding temperatures. The micostructure of the sample nitrided at 580 ℃ are γ′ and ε phase, and the hardness value reach its peak.
出处
《铸造技术》
CAS
北大核心
2015年第12期2873-2876,共4页
Foundry Technology
关键词
渗氮
耐磨铸铁
微观组织
硬度
nitriding
wear resistant cast iron
microstructure
hardness
