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| 热处理对铸态钢中硫化锰夹杂物的影响 | |
| 引用本文： | 林腾昌,门兵,程雄,郭瑞刚,董凯.热处理对铸态钢中硫化锰夹杂物的影响[J].中国冶金,2021,31(4):48-54. |
| 作者姓名： | 林腾昌 门兵 程雄 郭瑞刚 董凯 |
| 作者单位： | 1.钢铁研究总院冶金工艺研究所, 北京 100081; 2.攀钢集团江油长城特殊钢有限公司装备部, 四川 江油 621000; 3.山东省石横特钢集团有限公司生产技术部, 山东 泰安 271612; 4.北京科技大学冶金与生态工程学院, 北京 100083 |
| 基金项目： | 国家重点研发计划资助项目(2017YFB07B030400);国家自然科学基金资助项目(51674092) |
| 摘 要： | 基于1215易切削钢成分,采用Factsage软件对Mn-S-O-Fe体系进行热力学计算,并将铸坯样在不同温度进行热处理,运用金相显微镜、扫描电镜对热处理前后钢中硫化锰的变化进行了研究。结果表明,硫化锰在800 ℃热处理时开始出现晶间析出现象,析出的硫化锰在热处理后发生聚集长大的球化现象,且温度越高,球化现象越明显。经过1 200 ℃保温处理后,钢中大于10 μm夹杂物的比例上升。在500~1 200 ℃热处理时,硫化锰的长宽比降低率达到7%~15%。基于试验结果,轧制加热炉采用800~900、1 050~1 150及1 200~1 220 ℃加热制度有利于改善硫化锰形态,从而改善钢材易切削性能。 |
| 关 键 词： | 热处理 硫化锰 形貌 粒径 易切削钢 |
Influence of heat treatment on MnS inclusion in as-cast steel |
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| LIN Teng-chang,MEN Bing,CHENG Xiong,GUO Rui-gang,DONG Kai.Influence of heat treatment on MnS inclusion in as-cast steel[J].China Metallurgy,2021,31(4):48-54. | |
| Authors: | LIN Teng-chang MEN Bing CHENG Xiong GUO Rui-gang DONG Kai |
| Affiliation: | 1. Institute for Metallurgical Proeess, Central Iron and Steel Research lnstitute, Beijing 100081, China; 2. Equipment Department, Jiangyou Changcheng Special Steel Co., Ltd., Pansteel Group, Jiangyou 621000, Sichuan, China; 3. Production Technology Department, Shandong Shiheng Special Steel Group Co., Ltd., Taian 271612, Shandong, China; 4. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China |
| Abstract: | Based on the composition of 1215 free-cutting steel, the thermodynamic calculation of Mn-S-O-Fe system was carried out by Factpage software. 1215 free-cutting steel was heated at different temperatures, and changes of MnS inclusions before and after the heat treatment were observed by metallographic microscope and SEM. The results show that MnS inclusions began to precipitate along the grain boundary at 800 ℃ heat treatment, and balling phenomena with aggregation and growth of the precipitated MnS occurred after heat treatment, and the higher the temperature was, the more obvious balling phenomena was. After heat treatment at 1 200 ℃, the ratio of inclusions larger than 10 μm in the steel increased. Based on the result of experiment, the reheating furnace of rolling adopting 800-900, 1 050-1 150 and 1 200-1 220 ℃ heating operation is beneficial to improve form of MnS in free-cutting steel, so as to improve the performance of free cutting steel. |
| Keywords: | heat treatment MnS topography particle size free-cutting steel |
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