稀土微合金化对Q345NQR2热轧H型钢性能的影响  

Effect of Rare Earth Microalloying on Properties of Q345NQR2 Hot Rolled H-beam

作　　者：卜向东[1,2] 涛雅 王永明[1] 宋振东[1] 张达先[1] BU Xiangdong;TAO Ya;WANG Yongming;SONG Zhendong;ZHANG Daxian(Technical Center,Inner Mongolia Baotou Steel Union Corporation Limited,Baotou Inner Mongolia 014010,China;Inner Mongolia Enterprise Key Laboratory of Rare Earth Steel Products Research and Development,Baotou Inner Mongolia 014010,China)

机构地区：[1]内蒙古包钢钢联股份有限公司技术中心,内蒙古包头014010 [2]内蒙古自治区稀土钢产品研发企业重点实验室,内蒙古包头014010

出　　处：《高速铁路新材料》2022年第2期33-36,共4页Advanced Materials of High Speed Railway

摘　　要：通过在Q345NQR2热轧H型钢加入0.0050%铈铁合金,研究了稀土(Rare Earth,RE)加入对铸坯高温性能、力学性能及耐腐蚀性能的影响。结果表明:在VD真空后加入铈铁合金工艺可行,成品稀土含量收得率为28%;铈铁合金的加入有效改善了Q345NQR2异型坯高温脆性;-40℃低温冲击韧性及耐腐蚀性能略有提高,但改善效果不明显。By adding 0.0050% cerium iron alloy into Q345NQR2 hot rolled H-beam,the effects of rare earth(RE)addition on high temperature properties,mechanical properties and corrosion resistance of slab were studied.The results show that adding cerium iron alloy after VD vacuum is feasible,and the yield of rare earth in finished product is 28%.The addition of cerium iron alloy can effectively improve the high temperature brittleness of Q345NQR2.The impact toughness and corrosion resistance at -40℃ are slightly improved,but the improvement effect is not obvious.

关 键 词：稀土 微合金化 Q345NQR2 H型钢 

分 类 号：TG142.1[一般工业技术—材料科学与工程]