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		调质处理对G520钢焊接接头组织及性能的影响
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			Influence of Quenching and Tempering on Microstructure and Properties of Welded Joints of G520 Martensitic Steel
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| 图2. 热处理工艺流程图 | 
| Fig.2. Schematics of heat treatment process (AC—air cooling, OC—oil cooling, FC—furnace cooling, Ac1—start temperature of austenite transformation)(a) quenched-tempered before welding (1#) (b) quenched-tempered after welding (2#) | 
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