IF钢板坯表层大尺寸夹杂物的三维分布

Continuous Casting(2022)

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Abstract
IF钢铸坯表层大尺寸夹杂物分布对冷轧钢板表面质量有较大影响.采用ASPEX自动检测法与逐层刨削法研究了 IF钢铸坯表层20 mm内中100 μm以上夹杂物的三维分布.铸坯表层20 mm内夹杂物共分成3类,气泡、氧化铝+气泡、块状氧化铝,数量比例分别为72%、26%和2%.结合水模型研究了结晶器内大尺寸夹杂物被凝固坯壳捕获行为,结果表明,在现有浇铸工况下结晶器内大尺寸夹杂物主要集中在上回流涡心处与浸入式水口下部等结晶器"死区"位置.消除结晶器内死区有助于减少铸坯表层大尺寸夹杂物,提高轧板表面质量.
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