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《Heat Treatment》 2011-06
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Heat Treatment of New Type R4 Mooring Chain Steel

ZHANG Yi-wei~1,LI Ying-kui~2,YUAN Xiao-min~1 (1.School of Materials Science and Engineering,Anhui University of Technology,Ma' anshan 243002, Anhui China;2.Nanjing Iron and Steel Co.,Ltd.,Nanjing 210035,Jiangsu China)  
Microstructure and mechanical properties of a new type R4 mooring chain steel heat treated by different processes were investigated.The results show that both yield and tensile strengths decrease,and low-temperature impact toughness increases with the elevation of tempering temperature,and that after water quenching from 900°C and tempering at 620 to 660°C for 30 min,the microstmcture of the steel is composed of tempered troostite and tempered sorbite with better strength and toughness,conforming with mechanical property requirements for the R4 mooring chain steel.
【CateGory Index】: TG161
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