本文用热重法研究了稀土元素对20钢表面碳氮共渗过程的催渗作用,考察了不同稀土加入量、不同温度对催渗动力学过程的影响。结果表明:共渗速度可提高20—25％;钢表面层碳氮浓度亦有所增加,而且碳氮原子渗入的同时稀土作为活性组元也渗入了钢表面,产生了微合金化效果。
A study was made of the kinetics of the process of catalytic carbonitriding of a steel 20 surface activated by the various additions of rare earth under different temperatures by means of thermogravimetric analysis! It showed that the co-filtration of steel surface carbonitride together with rare earth, as an active element, leads to result microalloying . The carbonitriding rate may be accelerated up to 20—25% with improved quality of concentrated case.
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