摘要
通过高温试验研究了钙处理和镁处理对含硫易切削钢中夹杂物的控制效果。钙处理后钢中夹杂物为CaAl-O+(Ca,Mn)S复合夹杂物、(Ca,Mn)S以及Mn S夹杂物;镁处理后钢中夹杂物为Mg Al2O4+(Mg,Mn)S、Al2O3+Mn S复合夹杂物、(Mg,Mn)S以及Mn S夹杂物。钙处理和镁处理后钢中的复合夹杂物所占比例分别为0.67%和3.57%。镁处理后钢中Ⅱ类Mn S夹杂物明显减少,91.7%的夹杂物尺寸小于3μm,纺锤率达到72.5%,其对夹杂物的控制效果优于钙处理。
In this paper,the effects of calcium treatment and magnesium treatment on characters of inclusions in resulfurized free cutting steels were studied by high temperature experiments. The results show that the main types of inclusions after calcium treatment are Ca-Al-O +( Ca,Mn) S complex inclusions,( Ca,Mn) S and Mn S. Meanwhile,the main types of inclusions after magnesium treatment are MgAl_2O_4+( Mg,Mn) S,Al_2O_3+ MnS complex inclusions,( Mg,Mn) S and Mn S. The proportions of complex inclusions after calcium treatment and magnesium treatment are 0. 67% and 3. 57%,respectively. The amounts of type II Mn S inclusions in the steel are obviously reduced after Mg treatment,and 91. 7% of the inclusions are smaller than 3 μm in size. Furthermore,the ratio of spindle inclusions reached 72. 5%. Therefore,the effect of controlling inclusions by magnesium treatment is superior to calcium treatment.
出处
《钢铁钒钛》
CAS
北大核心
2017年第3期140-144,共5页
Iron Steel Vanadium Titanium
基金
国家自然科学基金项目(51374059)
国家自然科学基金项目(51674069)
关键词
含硫易切削钢
钙处理
镁处理
夹杂物
resulfurized free cutting steel
calcium treatment
magnesium treatment
inclusions
