稀土元素Ce对大型矿用车高强钢板Q620E的影响研究  

Effect of Rare Earth Element Ce on High Strength Steel Plate Q620E for Large Mining Vehicle

作　　者：卢晓禹 袁晓鸣[1] 黄利[1] 王少炳 Lu Xiaoyu;Yuan Xiaoming;Huang Li;Wang Shaobing(Technical Center of Inner Mongolia Baogang United Steel Co.,Ltd.;Key Laboratory of Rare Earth Steel Products R&D Enterprise of Inner Mongolia)

机构地区：[1]内蒙古包钢钢联股份有限公司技术中心 [2]内蒙古自治区稀土钢产品研发企业重点实验室

出　　处：《宽厚板》2024年第2期10-13,48,共5页Wide and Heavy Plate

摘　　要：采用中试试验平台完成不同稀土含量大型矿用车高强钢Q620E的研究,利用蔡司光学显微镜、扫描电镜对组织、夹杂物、冲击断口进行检测,分析不同稀土含量对力学性能的影响。研究结果表明:适当的稀土含量通过细化晶粒、降低夹杂物尺寸和增大韧窝断口尺寸等作用,可使Q620E钢的强度增加30 MPa以上,低温冲击功提高30 J以上,既降低了合金成本,又保证了强度和韧性。The effects of rare earth element with different contents on the mechanical properties of high strength steel Q620E for large mining vehicle are studied by means of the pilot plant testing platform,the tests are carried out on the microstructure,inclusions,impact fracture in order to analyze the effects of different rare earth element content by means of Zeiss optical microscope and scanning electron microscope.The results show that the strength of Q620E steel is increased by more than 30 MPa and the low temperature impact absorbed energy value is increased by more than 30 J under the joint action of grain refining,inclusion size reducing and dimple fracture dimension increasing with appropriate rare earth element content,which not only reduces the alloy cost,but also guarantees the strength and toughness.

关 键 词：稀土 高强钢 Q620E 显微组织 夹杂物 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TD50[金属学及工艺—金属材料]