本文对比分析了氮基保护气氛和真空两种热处理加热介质对300 M钢疲劳性能的影响，并研究了热处理后表面喷丸强化对300 M钢疲劳性能的改善情况。
In this paper, the effect of heat treatment by the nitrogen atmosphere and vacuum furnace and shot peening thereafter on fatigue properties of 300m steel were studied.
将出无氧化加热段的带钢继续加热到热处理制度要求的温度，并在保护气氛中对带钢表面微弱的氧化膜起还原作用。
The strip is heated here to required temperature and the light oxide film on the strip is reduced by protection atmosphere.
用真空熔炼法制备了多种贮氢合金原样，分别经不同温度、时间热处理和保护气氛下球磨处理。
In this paper a series of RE2MgNi9 hydrogen storage alloys were synthesized by vacuum induction melting method.
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