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Abstract:
In this paper, the effect of the micro-addition of race earth
elements (RE) to the nitriding process on the diffusion kinetics and
properties of 38CrMoAl steel were studied. The experimental results
indicate: the nitriding process of 38CrMoAl is accelerated under the
acting of activity and catalysis of RE, its rate of permeation is
increased 25%～30%; the wear resistance and bending fatigue of specimens
increases some too. The SEM energy spectum analysis denote: the RE La
has been permeated with the nitrogen together, which improves the
properties of surface layer through microalloying.
Key words: 稀土元素 氮化 铬钼钢
国家自然科学基金资助项目. Received
198907, received in revised form 199007
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