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Experimental Study on Rare Earth and Magnesium Composite Treatment of 49MnVS3 Non-quenched and Tempered Steel
Steel Research International ( IF 2.2 ) Pub Date : 2021-07-01 , DOI: 10.1002/srin.202100190 Yang Li 1 , Qi Wang 1 , Meng Sun 1 , Chang-Yong Chen 1 , Zhou-Hua Jiang 1
Steel Research International ( IF 2.2 ) Pub Date : 2021-07-01 , DOI: 10.1002/srin.202100190 Yang Li 1 , Qi Wang 1 , Meng Sun 1 , Chang-Yong Chen 1 , Zhou-Hua Jiang 1
Affiliation
Nowadays, under the context of severe resource shortage, it is urgent to develop non-quenched and tempered steel. Herein, a new method of combining rare-earth cerium (Ce) and magnesium (Mg) to treat the 49MnVS3 steel with low oxygen and rather high sulfur is proposed. The inclusions modification, microstructure evolution, and mechanical properties change of 49MnVS3 steel with different Ce and Mg content composite treatment are investigated by optical microscope (OM), scanning electron microscope (SEM)–energy-dispersive spectrometer (EDS), electron probe microanalyzer (EPMA), and tensile and impact tests. The results indicate that the small spherical Ce–Mn–Mg–O–S composite inclusions replace the Al2O3 wrapped MnS composite inclusions and elongated MnS inclusions after Ce and Mg joint treatment. After Ce and Mg composite treatment, the proportion of ferrite is significantly improved. Meanwhile, the interlamellar spacing of pearlite is refined. Attributed to modified inclusions and optimized microstructure, the strength and impact toughness are gradually enhanced. In contrast to Ce–Mg free steel, the impact energy of 4# steel with 0.0122 wt% Ce and 0.0012 wt% Mg addition is increased by 33%. In the current study, the optimal mass fractions of Ce and Mg are 0.0122 and 0.0012 wt%, respectively.
中文翻译:
49MnVS3非调质钢稀土镁复合处理的试验研究
如今,在资源严重短缺的背景下,发展非调质钢迫在眉睫。本文提出了一种稀土铈(Ce)和镁(Mg)复合处理低氧高硫49MnVS3钢的新方法。采用光学显微镜(OM)、扫描电子显微镜(SEM)-能谱仪(EDS)、电子探针显微分析仪等研究了不同Ce和Mg含量复合处理的49MnVS3钢的夹杂物改性、组织演变和力学性能变化。 EPMA),以及拉伸和冲击测试。结果表明,小球状 Ce-Mn-Mg-O-S 复合夹杂物取代了 Al 2 O 3Ce和Mg联合处理后包裹的MnS复合夹杂物和细长的MnS夹杂物。Ce、Mg复合处理后,铁素体比例显着提高。同时,细化珠光体的层间距。得益于改性夹杂物和优化的微观结构,强度和冲击韧性逐渐增强。与不含 Ce-Mg 的钢相比,添加 0.0122 wt% Ce 和 0.0012 wt% Mg的 4 #钢的冲击功提高了 33%。在目前的研究中,Ce 和 Mg 的最佳质量分数分别为 0.0122 和 0.0012 wt%。
更新日期:2021-07-01
中文翻译:
49MnVS3非调质钢稀土镁复合处理的试验研究
如今,在资源严重短缺的背景下,发展非调质钢迫在眉睫。本文提出了一种稀土铈(Ce)和镁(Mg)复合处理低氧高硫49MnVS3钢的新方法。采用光学显微镜(OM)、扫描电子显微镜(SEM)-能谱仪(EDS)、电子探针显微分析仪等研究了不同Ce和Mg含量复合处理的49MnVS3钢的夹杂物改性、组织演变和力学性能变化。 EPMA),以及拉伸和冲击测试。结果表明,小球状 Ce-Mn-Mg-O-S 复合夹杂物取代了 Al 2 O 3Ce和Mg联合处理后包裹的MnS复合夹杂物和细长的MnS夹杂物。Ce、Mg复合处理后,铁素体比例显着提高。同时,细化珠光体的层间距。得益于改性夹杂物和优化的微观结构,强度和冲击韧性逐渐增强。与不含 Ce-Mg 的钢相比,添加 0.0122 wt% Ce 和 0.0012 wt% Mg的 4 #钢的冲击功提高了 33%。在目前的研究中,Ce 和 Mg 的最佳质量分数分别为 0.0122 和 0.0012 wt%。