稀土渣系对35CrNi3Mo1V合金电渣锭枝晶间距及夹杂物的影响  

Influence of rare earth slag system on dendrite spacing and inclusions in electroslag ingot for 35CrNi3Mo1V alloy

作　　者：贾晓斌 雷丙旺 赵金华[3] 涂明金 尹冉冉 高猛 Jia Xiaobin;Lei Bingwang;Zhao Jinhua;Tu Mingjin;Yin Ranran;Gao Meng(Inner Mongolia North Heavy Industries Group Corp.Ltd.,Baotou 014030,China;State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083,China;School of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China)

机构地区：[1]内蒙古北方重工业集团有限公司,内蒙古自治区包头014030 [2]北京科技大学新金属材料国家重点实验室,北京100083 [3]太原科技大学材料科学与工程学院,山西太原030024

出　　处：《锻压技术》2025年第3期58-69,共12页Forging & Stamping Technology

基　　金：国防基础科研计划(JCKY2022208A002)。

摘　　要：为了探究稀土渣系对典型中碳中合金钢电渣重熔后微观组织的影响规律,对比研究了三七渣系、稀土渣系对电渣重熔35CrNi3Mo1V电极锭二次枝晶间距及非金属夹杂物分布特征的作用行为。结果表明,经过稀土渣系处理的电极锭(稀土锭)的外表面、1/4处及中心位置的平均二次枝晶间距要小于经过三七渣系处理的电极锭(三七锭)。稀土处理可以改性钢中非金属夹杂物形态,三七锭非金属夹杂呈断续杆状、三角形、球形及大块状,氧化物夹杂是由多个椭球状夹杂聚集而成,尺寸≤4μm的非金属夹杂约占总夹杂的89.5%;稀土锭非金属夹杂物包含稀土氧化物、稀土硫化物和稀土氧硫化物,该类夹杂物与原始自耗电极锭中夹杂物相比,形状较为规则、尺寸较小且分布弥散,尺寸≤4μm非金属夹杂占总夹杂的100%。In order to explore the influence laws of rare earth slag system on the microstructure of typical medium carbon medium alloy steel after electroslag remelting,the effects of 37 slag system and rare earth slag system on the secondary dendrite spacing and non-metallic inclusions distribution characteristics of 35CrNi3Mo1V alloy electrode ingots after electroslag remelting were compared.The results show that the average secondary dendrite spacing on the outer surface,1/4 and center of the electrode ingot treated with rare earth slag system(rare earth ingot)is smaller than that of the electrode ingot treated with 37 slag system(37 ingot).The morphology of non-metallic inclusions in steel can be modified by the rare earth treatment.The non-metallic inclusions of 37 ingot are intermittent rod-shaped,triangular,spherical and large blocks,and the oxide inclusions is formed by the aggregation of multiple ellipsoidal inclusions.Non-metallic inclusions with a size of less than or equal to 4μm account for about 89.5%of the total inclusions.Non-metallic inclusions of rare earth ingot include rare earth oxides,rare earth sulfides and rare earth oxysulfides.Compared with the inclusions in the original consumable electrode ingot,this type of inclusions has a more regular shape,smaller size and more dispersed distribution.Non-metallic inclusions with a size of less than or equal to 4μm account for about 100%of the total inclusions.

关 键 词：中碳中合金钢 稀土渣 电渣重熔 二次枝晶间距 非金属夹杂 

分 类 号：TF744[冶金工程—钢铁冶金]