一种新型硫-铅-碲复合易切削不锈钢热塑性研究  

Hot Ductility of Novel Sulfurized, Leaded and Tellurized Free-Machining Stainless Steel

作　　者：罗刚[1] 王辉绵 

机构地区：[1]太原钢铁(集团)有限公司先进不锈钢材料国家重点实验室,山西太原030003

出　　处：《热加工工艺》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)

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.

关 键 词：热塑性 易切削不锈钢 硫化锰夹杂 铅 碲 

分 类 号：TG142.71[一般工业技术—材料科学与工程]