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300M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.
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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