电工材料
電工材料
전공재료
ELECTRICAL ENGINEERING MATERIALS
2013年
2期
23-27
,共5页
硅钢%铸坯%再加热%夹杂物%析出行为
硅鋼%鑄坯%再加熱%夾雜物%析齣行為
규강%주배%재가열%협잡물%석출행위
Si steel%slab%reheating%inclusions%precipitation behavior
研究了硅钢铸坯再加热过程中夹杂物的析出行为。采用非水溶液电解提取+扫描电镜观察方法,观察了试样的显微组织,统计了夹杂物的尺寸、种类、数量、分布。结果表明,均热温度为1523 K时,水淬试样的夹杂物尺寸绝大部分小于0.5μm,0.5~5.0μm的夹杂物数量很少,没有发现5.0μm以上的夹杂物。此外,均热时间为10、30、60、90、120、240 min时,对应试样中0.05~0.2μm的夹杂物数量分别为4.04×104、4.73×104、3.70×104、3.33×104、3.10×104、1.56×104个/mm3。绝大部分夹杂物以MnS、AlN、CuxS类为主,并以三类夹杂物中的两类复合或三类复合居多。三类复合夹杂物总量占每组试样夹杂物总量的90%或以上。随均热时间延长,典型的夹杂物组成会发生如下变化:MnS+AlN+CuxS MnS+AlN AlN。与此同时,MnS、AlN、CuxS三者复合比例从45.2%(均热10 min)降为9.7%(均热240 min)。
研究瞭硅鋼鑄坯再加熱過程中夾雜物的析齣行為。採用非水溶液電解提取+掃描電鏡觀察方法,觀察瞭試樣的顯微組織,統計瞭夾雜物的呎吋、種類、數量、分佈。結果錶明,均熱溫度為1523 K時,水淬試樣的夾雜物呎吋絕大部分小于0.5μm,0.5~5.0μm的夾雜物數量很少,沒有髮現5.0μm以上的夾雜物。此外,均熱時間為10、30、60、90、120、240 min時,對應試樣中0.05~0.2μm的夾雜物數量分彆為4.04×104、4.73×104、3.70×104、3.33×104、3.10×104、1.56×104箇/mm3。絕大部分夾雜物以MnS、AlN、CuxS類為主,併以三類夾雜物中的兩類複閤或三類複閤居多。三類複閤夾雜物總量佔每組試樣夾雜物總量的90%或以上。隨均熱時間延長,典型的夾雜物組成會髮生如下變化:MnS+AlN+CuxS MnS+AlN AlN。與此同時,MnS、AlN、CuxS三者複閤比例從45.2%(均熱10 min)降為9.7%(均熱240 min)。
연구료규강주배재가열과정중협잡물적석출행위。채용비수용액전해제취+소묘전경관찰방법,관찰료시양적현미조직,통계료협잡물적척촌、충류、수량、분포。결과표명,균열온도위1523 K시,수쉬시양적협잡물척촌절대부분소우0.5μm,0.5~5.0μm적협잡물수량흔소,몰유발현5.0μm이상적협잡물。차외,균열시간위10、30、60、90、120、240 min시,대응시양중0.05~0.2μm적협잡물수량분별위4.04×104、4.73×104、3.70×104、3.33×104、3.10×104、1.56×104개/mm3。절대부분협잡물이MnS、AlN、CuxS류위주,병이삼류협잡물중적량류복합혹삼류복합거다。삼류복합협잡물총량점매조시양협잡물총량적90%혹이상。수균열시간연장,전형적협잡물조성회발생여하변화:MnS+AlN+CuxS MnS+AlN AlN。여차동시,MnS、AlN、CuxS삼자복합비례종45.2%(균열10 min)강위9.7%(균열240 min)。
The methods of electrolysis extraction from nonaqueous solution and scanning electron microscope were adopted to study the precipitation behavior of non-metallic inclusions in Si steel slabs during reheating processes. The morphologies, chemical compositions, quantity and size distribution of non-metallic inclusions in these steel samples were analyzed. Results show that, when the soaking temperature is 1 523 K, almost all of the non-metallic inclusions are smaller than 0.5μm, few are in the range of 0.5~5.0μm, and no non-metallic indusion is larger than 5.0μm. Meanwhile, in the size range of 0.05~0.2μm, the total quantity of non-metallic inclusions is 4.04× 104/mm3, 4.73 × 104/mm3, 3.70 × 104/mm3, 3.33 × 104/mm3, 3.10 × 104/mm3 and 1.56 × 104/mm3, the corresponding reheating time is 10 min, 30 min, 60 min, 90 min, 120 min and 240 min, respectively. Almost all of the non-metallic inclusions are MnS, AlN and CuxS under different reheating time, and most of which exist as the composite of two or three types of non-metallic inclusions. The quantity of the above composite of three types of non-metallic inclusions is up to 90% in each steel sample. The typical types of non-metallic inclusions will change with the inextension of reheating time as MnS+AlN+CuxS→MnS+AlN→AlN. The proportion of the composite containing MnS, AlN and CuxS decreased from 45.2%(reheating time 10 min) to 9.7% (reheating time 240 min).