摘要
基于反向工程方法,对市售5种具有代表性的圆珠笔笔尖钢的成分及含量、易切削相组成及配比进行了检测分析,探讨了开发笔尖钢的关键工艺参数。研究结果显示:5种笔尖钢均为含硫-铅-碲的易切削不锈钢,硫的平均质量分数高于0.35%,平均锰硫比(Mn/S)值为3.45,铅的质量分数为0.11%~0.12%,碲的质量分数为0.013%~0.021%;钢中主要易切削相为硫化锰、单质铅和碲化物。5种笔尖钢中夹杂物的平均等效直径分别为3.3、4.1、4.9、3.8、3.8μm,其中3号笔尖钢中硫化物形态控制较好,易切削相分布均匀。基于检测结果开展了加Te高硫钢高温熔炼试验,通过对硫化物的碲改质寻找最佳的碲硫比(Te/S)值,结果显示,当Te/S=0.25时,夹杂物形态控制较好,进一步提高Te/S,夹杂物改质效果提升不明显。
Composition and content,composition and proportion of free-cutting phases in pen tip steel made for five types of typical ballpoint pens on sale were tested and analyzed based on the reversed engineering method,to explore the key technical parameters for the development of the pen tip steel.The research results showed that five types of pen tip steels were free-cutting stainless steels containing sulfur,plumbum and tellurium,the average mass fraction of sulfur was above 0.35%,the average Mn/S value was 3.45,the mass fraction of plumbum ranged from 0.11%to 0.12%,and the mass fraction of tellurium ranged from 0.013%to 0.021%.The main free-cutting phases in steels were manganese sulfide,plumbum and telluride.The average equivalent diameter of inclusions in the five kinds of pen tip steels was 3.3μm,4.1μm,4.9μm,3.8μm and 3.8μm respectively.As compared with the inclusions in other steels,the morphology of sulfide in steel No.3 was better controlled and the free-cutting phases dispersed relatively uniformly.Based on the detecting result and discussion,high temperature melting experiment of high sulphur steel to which tellurium was added was conducted to explore the best Te/S value for the tellurium modification of sulfide inclusion.The result showed that when the Te/S value was equal to 0.25,the morphology of inclusion was well controlled,and the further increase in Te/S value had a little influence on the improvement in modification of inclusions.
作者
付文笙
沈平
杨乾坤
张东
杨树峰
付建勋
FU Wensheng;SHEN Ping;YANG Qiankun;ZHANG Dong;YANG Shufeng;FU Jianxun(State Key Laboratory of Advanced Special Steel,Shanghai 200444,China;Shanghai Key Laboratory of Advanced Ferrometallurgy,Shanghai 200444,China;School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China;School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China)
出处
《上海金属》
CAS
北大核心
2019年第5期91-96,104,共7页
Shanghai Metals
基金
国家自然科学基金(No.5167010237,No.5187040489)
省部共建高品质特殊钢冶金与制备国家重点实验室开放基金2017-05
关键词
反向工程方法
易切削笔尖钢
不锈钢
硫化锰
reversed engineering method
free-cutting ballpoint pen tip steel
stainless steel
MnS
