20CrMnH的稀土共渗工艺对渗碳动力学的影响研究  

Study of Effect of Rare Earth Co-permeation for 20CrMnH on Kinetic of Gas Carburization

作　　者：曹利民[1] 马李[2] 赵先锐[2] 

机构地区：[1]东安汽车动力股份有限公司205车间,黑龙江哈尔滨150066 [2]台州学院物理与电子工程学院,浙江台州318000

出　　处：《台州学院学报》2010年第3期28-33,共6页Journal of Taizhou University

摘　　要：对20CrMoH材料汽车齿轮在周期式可控气氛多用炉中进行了稀土渗碳工艺的研究。通过实验考察了添加稀土对渗碳层深及提高碳势对渗碳速度的影响。实验结果表明:采用880℃～900℃,以氮气加甲醇为载体气氛的稀土渗碳工艺中,稀土加入量为5%时渗碳效果最佳,使碳在奥氏体中的扩散系数较普通渗碳提高了1.25～1.35倍;稀土渗碳过程中,提高碳势能稍增加渗碳层厚度,但效果并不明显。RE carburizing technology on the automotive gear of steel 20CrMoH was studied in muti-purpose chamber furnace with protective-gas atmospheres in this paper.The influence of RE addition on the depth of carburized layer and the influence of carbon potential increase on carburizing speed were analyzed by experi-ments.The results show that the pervasion modulus of carbon is(1.25-1.35) times faster than the general car-burizing in austenite with the optimal addition of 5% RE under(880-920)℃ in the atmosphere of ...

关 键 词：汽车齿轮 稀土渗碳 碳势 

分 类 号：TG156.81[金属学及工艺—热处理]