摘要
利用Gleeble-3800热模拟试验机研究了一种新型硫-铅-碲复合易切削不锈钢热塑性,并对变形前后试样进行了光镜和电镜观察。结果表明,钢基体中存在大量Mn S、Pb及其Mn S-Pb-Te共同形成的复合夹杂物。温度对材料的热塑性产生重要影响,在大于900℃、小于1200℃区间断面收缩率大于60%,具有好的热塑性。φ350电渣锭从钢锭表面至心部,热塑性差异不大,但呈逐渐递减趋势,且与夹杂物大小和间距存在密切关系。
The hot ductility of novel sulfurized, leaded and tellurized free-machining stainless steel were investigated on thermomechanical simulator Gleeble 3800. The samples from ESR ingot and hot-tensile-tested specimens were observed by optical microscopy（OM and scanning electron microscopy（SEM）. The results show that there are large numbers of Mn S, Pb and Mn S-Pb-Te compound inclusions in the matrix; temperature has a strong effect on the hot ductility of the steel, and when in the temperature range of above 900℃and below 1200℃, the steel has a favorable hot ductility with fracture section area reduction above 60%; from the surface location to center of φ350 ESR ingot, the hot ductility is nearly similar, showing a decline trend, which is directly related to the inclusion size and space.
出处
《热加工工艺》
CSCD
北大核心
2015年第14期59-62,共4页
Hot Working Technology
基金
国家科技支撑计划项目(2011BAE31B00)
关键词
热塑性
易切削不锈钢
硫化锰夹杂
铅
碲
hot ductility
free-cutting stainless steel
Mn S inclusion
lead
tellurium
