近终形异型连铸坯中显微夹杂物行为研究  

Study on Micro-inclusions Behavior of Beam Blanks

作　　者：张耀平[1] 王硕明[2] 张树江[2] 张彩军[2] 

机构地区：[1]河北钢铁集团矿业公司,河北唐山063000 [2]河北理工大学冶金与能源学院,河北唐山063009

出　　处：《钢铁钒钛》2009年第2期71-74,79,共5页Iron Steel Vanadium Titanium

摘　　要：对采用半敞开方式浇铸的H型钢中显微夹杂物的类型、数量、尺寸以及分布情况进行研究,并通过示踪剂追踪分析了钢中夹杂物的来源。试验结果表明:铸坯内T[O]平均为70.8×10-6,显微夹杂总体积率为0.15%,主要分为球形硅钙酸盐夹杂、块状硅铝酸盐夹杂、球状硫化钙夹杂三类。其中前两类占夹杂总量的89.7%,为多元素的复合氧化物,两者的化学成分比较接近,区别主要在于A l、Ca含量;第三类占10.3%,该类夹杂含S较高。夹杂物主要为小于10μm的显微夹杂,它的分布特点决定了连铸坯中夹杂物的分布特点。The type, magnitude, size and distribution of non-metallic inclusions in beam blanks were researched via systemic sampling and adopting metallographic analysis and SEM/EDS, and the origin of inclusions in H beam was analyzed through method of tracer. The result show that the average of T[ O ] is 70. 8 × 10^-6, the volume ratio of micro-inclusions is 0. 15%. Micro-inclusions mainly have three kinds： A, B and C, the total micro-inclusions contain 89. 7% of A and B, the chemic elements of A and B are similar, the main difference of A and B is that they have different amount of AI, Ca. And C holds 10. 3% in the micro inclusions, which has high content of S. The inclusions＇ size is mostly less than 10 μm. The distribution trait of inclusions in slab is mainly decided by them.

关 键 词：H型钢 近终形连铸 异型坯 显微夹杂物 示踪法 体积率 

分 类 号：TF777[冶金工程—钢铁冶金]