摘要
与气体碳氮共渗技术相比,真空碳氮共渗不仅保留了其淬火温度低、变形小、淬透性强以及适用于合金钢、碳素钢等优点,还克服了气体碳氮共渗易产生晶界氧化层的缺点,且节约了原料气,废气排放量较少,有利于环保。经850℃×120min真空碳氮共渗后,16MnCr5钢渗层深0.45mm,20CrMnTi钢渗层深0.33mm,35碳素钢渗层深0.30mm。用该新技术处理的20CrMo钢制精密级(5级)齿轮内孔直径变形量≤0.01mm,且无喇叭口。
Vacuum carbonitriding process reserves many advantages comparing with that of traditional gas carbonitriding, and overcomes the defects of grain-boundary oxidation. The application of vacuum carbonitriding can save raw gas, reduce exhaust emission greatly and be benefit to environment protection. After vacuum carbonitriding at 850℃ for 120min,the depth of penetrated layer of 20CrMnTi or 35 steel can gain 0. 33mm and 0. 30mm respectively. The deformation in diameter of the inner hole of precision gear treated with new process is less than 0. 01mm,without flare groove.
出处
《金属热处理》
EI
CAS
CSCD
北大核心
2006年第3期59-61,共3页
Heat Treatment of Metals
关键词
真空碳氮共渗
晶界氧化
氨气
vacuum carbonitriding
grain boundary oxidation
ammonia gas
