|
|||||
|
|
| SAE1144钢铸坯中硫化物分布及其偏析行为分析 | |
| 引用本文： | 王奕,李志伟,徐翔宇,张志明,周楠,付建勋.SAE1144钢铸坯中硫化物分布及其偏析行为分析[J].中国冶金,2022,32(4):34-40. |
| 作者姓名： | 王奕 李志伟 徐翔宇 张志明 周楠 付建勋 |
| 作者单位： | 1.上海大学材料科学与工程学院先进凝固技术中心, 上海 200444; 2.上海大学材料科学与工程学院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; 3.广东韶钢松山股份有限公司制造部, 广东 韶关 512123 |
| 基金项目： | 国家自然科学基金资助项目(51874195,51671124); 广东省科技专项资助项目([2020]43 号) |
| 摘 要： | SAE1144是典型的中碳高硫易切削钢,钢中硫化物的形貌、大小、空间分布、偏析是影响其产品性能的关键因素.对国内某厂生产的SAE114连铸坯取样,采用金相显微镜、扫描电镜、夹杂物三维腐刻技术等表征方法开展硫化物形貌的解析,分析了铸坯中硫化物类型、空间分布、三维形貌的变化规律,并总结了硫偏析的规律.研究发现,SAE114... |
| 关 键 词： | SAE1144钢 硫化物分布 硫偏析 三维蚀刻 夹杂物 三维形貌 |
Analysis of sulfide distribution and segregation behavior in SAE1144 steel cast slab |
|
| WANG Yi,LI Zhi-wei,XU Xiang-yu,ZHANG Zhi-ming,ZHOU Nan,FU Jian-xun.Analysis of sulfide distribution and segregation behavior in SAE1144 steel cast slab[J].China Metallurgy,2022,32(4):34-40. | |
| Authors: | WANG Yi LI Zhi-wei XU Xiang-yu ZHANG Zhi-ming ZHOU Nan FU Jian-xun |
| Affiliation: | 1. Advanced Solidification Technology Center, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China; 2. State Key Laboratory of High-quality Special Steel Metallurgy and Preparation, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China; 3. Manufacturing Department, Guangdong Shaogang Songshan Co., Ltd., Shaoguan 512123, Guangdong, China |
| Abstract: | Abstract: SAE1144 is a typical medium-carbon and high-sulfur free-cutting steel. The morphology, size, spatial distribution and segregation of sulfides in the steel are the key factors that affect the performance of its products. In this experiment, a sample of SAE1144 continuous casting slab produced by a domestic factory was used to analyze the sulphide morphology using characterization methods such as metallographic microscope, scanning electron microscope, and three-dimensional inclusion etching technology, change law of sulfide type, spatial distribution and three-dimensional morphology in the cast slab was analyzed, and the law of sulfur segregation was summarized. It is found that the type of sulfide in SAE1144 cast slab is mainly manganese sulfide inclusions, and the sulfide in the chilled layer is mainly a single ellipsoidal sulfide. The sulfide in the columnar crystal region is mainly a single type sulfide, and the sulfide in the central equiaxed dendrite crystal region are mainly cluster-shaped, chain-shaped and single-type sulfides. The maximum segregation value at the center of SAE1144 cast slab is 1.30. The enrichment of micro-segregation for sulfur elements in the primary dendrite and secondary dendrite leads to the macro-distribution segregation of MnS. The presence of aggregated large particles of MnS is a reflection of SAE1144 sulfur segregation, and it is also an important quality bottleneck restricting product performance. |
| Keywords: | SAE1144 steel sulfide distribution sulfur segregation three-dimensional etching inclusion three-dimensional morphology |
| 点击此处可从《中国冶金》浏览原始摘要信息 | |
| 点击此处可从《中国冶金》下载全文 | |