无损电解提取弹簧钢中夹杂物实验研究

Study on the Extraction of Inclusions in Spring Steel Using the Method of Non-Destructive Electrolysis

以非水电解液为介质,设计了一种无损电解弹簧钢方法,并在某钢铁企业生产冶炼51Cr V4弹簧钢过程中,对LF精炼开始和钙处理结束时分别取钢样进行电解实验,采用扫描电镜和能谱分析对电解得到的夹杂物进行形貌、尺寸和成分检测。实验结果表明:在LF精炼开始时夹杂物主要为不规则多边形,平均尺寸为25μm;经过钙处理后,夹杂物转变为球形,平均尺寸为14μm。实验过程中还发现经钙处理后夹杂物表面出现高熔点Ca S富集,表明在钙处理时喂钙量过高,应在冶炼过程中适当降低。

With non-aqueous electrolyte as the medium,a non-destructive electrolytic method has been adopted to extract inclusions from spring steel.An electrolytic experiment has been carried out on the steel samples at the beginning of the LF refining and at the end of the calcium treatment in the process of smelting 51 CrV4 spring steel in a steel enterprise,followed by an examination of the morphology,size and composition of the inclusions by scanning electron microscopy（SEM） and energy spectrum analysis.The results show that the inclusions are mainly irregular polygons in shape,with the average size about 25 μm at the beginning of LF refining,which are transformed into spherical shapes after the calcium treatment,with the average size reduced to 14 μm.It has also been found that there is a concentration of Ca S with a high melting point on the surface of inclusions,indicating that the calcium content tends to be very high in the process of calcium treatment,which should be properly reduced in the process of smelting.