摘要
研究渗氮气氛中不同氨气比例及喷射与非喷射渗氮方式对取向硅钢氮含量的影响,对渗氮前后样品表层氧化膜变化进行比较。结果表明,氧化膜厚度为0.1μm的硅钢片在渗氮温度为750℃,氨气量为1%-5%条件下渗氮时短时间内渗氮效果不明显,氨气量为10%-40%的气氛渗氮效果明显。随着氨气比例的增加,硅钢片中的氮含量增加,当氨气量为30%时,喷氮方式渗氮后的硅钢片渗氮量是非喷氮方式的2.5倍。此外,渗氮气氛中的氢气可以还原氧化膜厚度的20%。
The effects of ammonia proportion and the nitriding modes of spraying as well as non-spraying on nitrogen content in oriented silicon steel were studied. The change of oxidation film before and after nitriding is analyzed. The results show that the nitriding which is proceeded in the steel with the oxide film of 0. 11μm at 750 ℃, 1% -5% （volume percentage） NH3 has no prominent nitriding effect in a short time. However,the nitriding effect is prominent when volume percentage of NH3 is 10% -40%. With increasing the volume percentage of NH3 ,the nitrogen content increases. When the volume percentage of NH3 is 30% ,nitrogen content by spraying nitriding mode is 2. 5 times as much as that by non-spraying. Hydrogen in the nitriding atmosphere can deoxide the thickness of the oxidation film by 20%.
出处
《金属热处理》
CAS
CSCD
北大核心
2009年第10期69-71,共3页
Heat Treatment of Metals
基金
湖北省自然科学基金(2006ABA292)
关键词
取向硅钢
氨气
渗氮
氧化膜
oriented silicon steel
ammonia
nitriding
oxidation film
