碲系易切削钢及其切削性评价  

Evaluation of Te-based free-cutting steel and its machinability

作　　者：刘贝贝 张盼盼 胡涛 张浩 陈永峰 邹虎 付建勋 LIU Beibei;ZHANG Panpan;HU Tao;ZHANG Hao;CHEN Yongfeng;ZOU Hu;FU Jianxun(Shanghai University Center for Advanced Solidification Technology(CAST),State Key Laboratory of Advanced Special Steel,Shanghai University,Shanghai 200444,China;Wuhu Xinxing Ductile Iron Pipes Co.,Ltd.,Wuhu 241002,China)

机构地区：[1]上海大学材料科学与工程学院先进凝固技术中心省部共建高品质特殊钢冶金与制备国家重点实验室,上海200444 [2]芜湖新兴铸管有限责任公司,安徽芜湖241002

出　　处：《炼钢》2022年第1期73-79,共7页Steelmaking

基　　金：国家自然科学基金资助项目(52074179,51874195)。

摘　　要：硫系易切削钢利用硫化物的脆断性来提升钢材的切削性能,硫化物的形态、大小、分布是决定易切削钢切削性能优劣的关键因素。上海大学与芜湖新兴铸管有限责任公司合作,通过在1215MS易切削钢基础上添加碲元素,来改善硫化物的形态及分布,提升产品的切削性能。结果表明:硫系易切削钢添加质量分数0.016%的碲后,易切削钢中硫化物三维形貌从长条状变成椭球状,硫化物形态达到高硫易切削钢德标Sep 1572的1-2等级,硫化物的平均面积达到124μm^(2),是一般易切削钢硫化物面积的4倍以上;经与AISI12L14、SUM24L铅系易切削钢超过120 h切削加工对比,刀具磨损表面光洁度达到了相同效果,碲系易切削钢成功替代铅系易切削钢。Sulfur-based free-cutting steel uses the brittleness of sulfide to improve the cutting performance of steel.The shape,size and distribution of sulfide are the key factors that determine the cutting performance of free-cutting steel.Shanghai University cooperated with Wuhu Xinxing Ductile Iron Pipe Co.,Ltd.to improve the shape and distribution of sulfides by adding Te to the 1215 MS free-cutting steel,and enhance the cutting performance of the product.The results showed that after adding Te with mass fraction of 0.016%to sulfur-based free-cutting steel,the three-dimensional morphology of sulfide in free-cutting changed from strip to ellipsoid,and the sulfide form reached grade 1-2 of German standard SEP1572 of high sulfur free cutting steel.The average area of sulfide reached 124μm^(2),which was more than four times the sulfide area of general free-cutting steel sulfide.Compared with AISI12L14 and SUM24L lead-based free-cutting steel for more than120 hours of cutting processing,the tool wear surface finish had reached the same effect.Te-based free-cutting steel successfully replaced lead-based free-cutting steel.

关 键 词：硫系易切削钢 碲系易切削钢 硫化物 三维形貌 切削性能 

分 类 号：TF763[冶金工程—钢铁冶金]