Mo对R5系泊链钢过冷奥氏体连续冷却转变曲线的影响  

Effect of Mo on under-cooled austenite continuous cooling transformation curves of R5 offshore mooring chain steel

作　　者：曹瑞芳[1] 王福明[1] 李长荣[2] 成玉飞[3] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]北京科技大学材料科学与工程学院,北京100083 [3]河北工业大学体育部,天津300130

出　　处：《金属热处理》2010年第5期6-10,共5页Heat Treatment of Metals

摘　　要：采用热膨胀仪、金相显微镜与维氏硬度计测定了不同Mo含量下R5系泊链钢的过冷奥氏体在不同冷却速度下的连续冷却转变曲线(CCT),并观察了试验钢在不同冷却条件下的显微组织。结果表明,在R5系泊链钢中钼含量每增加0.15%,Bs点平均下降28℃左右,当Mo含量分别为0.3%、0.45%、0.6%时,Bs点温度依次为632℃、601℃和576℃,钼对Ms点影响较小,降幅不足10℃。Based on dilatometry,metallography and Vickers hardness determination,the continuous cooling transformation curves（CCT） of the under-cooled austenite were determined for R5 offshore mooring chain steels with varied contents of Mo.And the microstructure of these steels under different cooling conditions was observed.The results show that when Mo content increases by 0.15%,the start temperature of bainite transformation decreases by about 28 ℃,when Mo contents are 0.30%,0.45% and 0.60%,Bs point temperatures are 632 ℃,601 ℃ and 576 ℃,respectively.And Mo has little effect on Ms point,which decreases by less than 10 ℃.

关 键 词：Mo R5系泊链钢 贝氏体转变 连续冷却转变曲线 

分 类 号：TG142.11[一般工业技术—材料科学与工程] TG142.13[金属学及工艺—金属材料]