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作 者:安治国[1] 黄艳新 侯环宇[1] 陈红卫 刘艳丽[1] 史远[1] AN Zhi-guo HUANG Yan-xin HOU Huan-yu CHEN Hong-wei LIU Yan-li SHI Yuan(Technology Research Institute, Hesteel Group, Shijiazhuang 050000, Hebei, China Technique Center, Shijiazhuang Iron and Steel Company, Hesteel Group, Shijiazhuang 050031, Hebei, China)
机构地区:[1]河钢集团钢铁研究总院,河北石家庄050000 [2]河钢集团石钢公司技术中心,河北石家庄050031
出 处:《钢铁》2016年第12期70-73,共4页Iron and Steel
基 金:河北省科技计划资助项目(14211014D)
摘 要:采用DIL805L型膨胀仪研究了一种汽车前轴用贝氏体型非调质钢的连续冷却相变组织变化规律,分析了合金元素和冷却速度对CCT曲线、相变组织和显微硬度的影响。结果表明,锰、硅、铬、钒、硼等元素的加入使得贝氏体型非调质钢FAS2225珠光体和贝氏体转变曲线完全分离,可以在较宽的冷却速度范围内得到贝氏体组织,当冷却速度大于0.1℃/s时,均可获得贝氏体组织。随着冷却速度的提高,试验钢的显微硬度增大,当冷却速度为0.1以及2℃/s时,硬度增加的幅度发生明显改变。Microstructure evolution of bainite non-quenched and tempered steel for automobile front axle during continuous cooling transformation was studied by DIL805 L thermal dilatometer. The influences of alloy elements and cooling rate on the continuous cooling transformation curves,microstructure and micro-hardness of the steel were analyzed. The results show that alloy elements,such as Mn,Si,Cr,V and B in FAS2225 steel,were favorable for getting bainite in a wider range of cooling rate,and the transformation zones of pearlite and bainite were separated in the CCT diagram.Bainite can be obtained above the cooling rate of 0.1 ℃/s. With the increasing of cooling rates,the Vickers hardness of experimental steel increased,but the increase amplitude has changed significantly at the cooling rate of 0.1 and 2 ℃/s.
关 键 词:贝氏体型非调质钢 过冷奥氏体 连续冷却转变 显微组织
分 类 号:TG142.1[一般工业技术—材料科学与工程] U463.1[金属学及工艺—金属材料]
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