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		航空齿轮钢16Cr3NiWMoVNbE的真空低压渗碳
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			Vacuum Low-pressure Carburization of Gear Steel 16Cr3NiWMoVNbE for Aviation
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| 图5. 16Cr3NiWMoVNbE钢渗碳淬火后显微组织的OM像 | 
| Fig.5. OM images of 16Cr3NiWMoVNbE steel after carburizing and quenching (a) carbide region (b) mixed region (c) acicular martensite region (d) lath martensite region | 
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