低碳含碲硫易切削钢的研究与实践

Research and practice of low carbon free-cutting steel containing tellurium and sulfur

通过合理的化学成分、钢水全氧含量、w(Mn)/w(S)、w(Te)/w(S)及加热温度的设计与控制,成功开发出一种环保型含碲硫1214Te易切削钢,并进行了工艺实践。通过金相显微镜、扫描电镜、能谱仪对1214Te盘圆及1215MS盘圆硫化物夹杂进行观察分析发现,1214Te轧材中硫化物夹杂多数呈纺锤形或椭球形,1215MS轧材中硫化物夹杂多数呈长条状。在相同切削条件下,1214Te轧材的断屑效果优于1215MS轧材,且切削加工后的1214Te轧材表面粗糙度降低。

Through the design and control of reasonable chemical composition,total oxygen content of steel,w(Mn)/w(S)ratio,w(Te)/w(S)ratio and heating temperature,an environmentally friendly 1214 Te free-cutting steel containing sulfur and tellurium was successfully developed,and the process was carried out.Metallographic microscope,scanning electron microscope and energy spectrometer were used to observe and analyze the sulfide inclusions in 1214 Te disk and 1215 MS disk,which showed that most of the sulfide inclusions in the 1214 Te rolled product were spindle-shaped or ellipsoid,and most of the sulfide inclusions in the 1215 MS rolled product were long strip.Under the same cutting condition,the chip breaking effect of 1214 Te rolled product was better than that of 1215 MS rolled product,and the surface roughness of 1214 Te rolled product after cutting was reduced.