摘要
针对表面质量要求非常严格的高等级汽车板,通过现场工业试验及取样,利用ASPEX系统研究不同类型铸坯在内弧0.5~5.0 mm内大于5μm夹杂物的粒径、类型、数量密度,同时对机清3 mm与非机清热轧板卷取样进行定量分析与评价。结果表明,不同类型铸坯夹杂物均集中在距内弧表层0.5~3.0 mm内,并随着距离表层的增大,夹杂物数量密度逐渐降低,其中头坯距表面0.5~3.0 mm时夹杂物数量密度由2.25个/mm^(2)降至1.32个/mm^(2),距离表层3.5~5.0 mm范围内夹杂物数量密度趋于平稳为1.25个/mm^(2)。正常坯距表面0.5~3.0 mm时夹杂物数量密度由0.89个/mm^(2)降至0.71个/mm^(2),距离表层3.5~5.0 mm范围内夹杂物数量密度趋于平稳为0.63个/mm^(2)。非机清板卷夹杂物类型与机清板卷夹杂物类型相同,板卷中夹杂物主要为Al2O3、TiN和Al2O3-TiN复合夹杂,对机清和非机清夹杂物数量对比发现,夹杂物数量密度分别为0.64个/mm^(2)和0.88个/mm^(2)。
In order to meet the automotive steel plate with very strict and high-grade surface quality requirements,inclusions with size larger than 5μm in the internal arc within 0.5-5.0 mm of different types of slabs was studied by using ASPEX based on industrial test and sampling.The samples with machined to a depth of 3 mm and non-machining of hot rolled plates were quantitatively analyzed and evaluated.The results show that inclusions are concentrated within 0.5-3.0 mm from the top surface of the slab,and with the increase of the distance from the surface,the number density of inclusions gradually decreases,the number density of inclusions decreased from 2.25 to 1.32 per/mm^(2)when the distance from the surface was 0.5 to 3.0 mm in the first slab.The number density of inclusions tended to be stable at 1.25 per/mm^(2)within 3.5-5.0 mm from the surface.The number density of inclusions decreased from 0.89 to 0.71 per/mm^(2)when the distance from the surface was 0.5 to 3.0 mm in the normal slab.The number density of inclusions tended to be stable 0.63/mm^(2)within 3.5-5.0 mm from the surface.The inclusion type of non-scarfing plate is the same as that of scarfing plate.The inclusions in the plates are mainly Al2O3,TiN and Al2O3-TiN composite inclusions.The comparison of the number density of inclusions shows that the number density of inclusions is 0.64 and 0.88 per/mm^(2)in the scarfing and non-scarfing plate,respectively.
作者
包丽明
吕国成
朱金禄
BAO Liming;LÜGuocheng;ZHU Jinlu(Jilin Technology College of Electronic Information,Jilin 132021,Jilin,China;Technology Center,Tonghua Iron Steel Co.,Ltd.,Tonghua 134003,Jilin,China)
出处
《连铸》
北大核心
2025年第2期28-34,共7页
Continuous Casting
关键词
汽车板
机清
夹杂物
定量分析
铸坯
automobile plate
scarfing
inclusion
quantitative analysis
slab
