利用宏观分析、显微检验、硬度测试和装车试验等手段，对引进奥地利重型汽车内齿圈按照新的气体氮碳共渗工艺处理后的质量进行了研究。
The quality analysis for gas nitrocarburized inner gear ring of heavy truck imported from Austria was taken by means of macro/micro-examination, hardness measuring and running test.
本文研究了稀土元素在气体碳氮共渗中的作用，并系统地提出了稀土催化机理。
This paper studies the effects of rare earth elements (re) in the gas carbonitriding and puts forward a systematic proposition of the rare earth elements catalyzing mechanism.
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