超声波和电脉冲对钢液凝固组织的影响  

Laboratory Study on the Effect of Ultrasonic and Electric Impulse Discharging on Solidification Structures of Liquid Steel

作　　者：权淑丽[1] 郭昭桥 陶力农 

机构地区：[1]杭州钢铁集团公司技术中心,浙江杭州310022 [2]杭钢集团紫鼎工贸公司,浙江杭州310022

出　　处：《钢铁钒钛》2014年第1期95-100,共6页Iron Steel Vanadium Titanium

摘　　要：采用自行设计的超声波设备开展了超声波处理45钢凝固组织试验;采用脉冲磁场装置开展了60Si2CrVA弹簧钢浇铸前和浇铸后40 s施加电脉冲试验。试验结果表明,超声波处理显著提高45钢铸锭的力学性能;60Si2CrVA弹簧钢浇铸前施加脉冲磁场,铸锭中等轴晶比例由未施加脉冲磁场的49%提高至施加5 Hz/200 V脉冲磁场的74%,等轴晶尺寸由1 mm细化至0.4 mm;60Si2CrVA弹簧钢浇注后40 s施加脉冲磁场,随脉冲磁场作用时间的增加,等轴晶比例升高,等轴晶尺寸减小。Ultrasonic sent from self - designed ultrasonic device was used to inf/uence solidification structures of steel C45 in experiments, and electric impulse generated from pulsed magnetic field device was employed to influence spring steel 60Si2CrVA before casting and 40 s after casting respectively. The re- suits show that the mechanical properties of steel C45 are noticeably improved after ultrasonic treatment. For spring steel 60Si2CrVA influenced with pulsed magnetic field of 5 Hz/200 V before casting, isometric crystal ratio of the cast ingot is greatly increased to 74% from 49% when untreated by the magnetic field, and isometric crystal sizes are significantly reduced to 0.4 mm from 1 mm. For spring steel 60Si2CrVA influenced 40 s after casting,isometric crystal ratio is with the increase of influence time. increased, and isometric crystal sizes are reduced

关 键 词：超声波 电脉冲 铸锭 等轴晶 力学性能 

分 类 号：TF77[冶金工程—钢铁冶金]