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首页> 外文期刊>Journal of Materials Engineering and Performance >Effects of Zr, Ti, and Al Additions on Nonmetallic Inclusions and Impact Toughness of Cast Low-Alloy Steel
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Effects of Zr, Ti, and Al Additions on Nonmetallic Inclusions and Impact Toughness of Cast Low-Alloy Steel

机译：Zr，Ti和Al添加对铸造低合金钢的非金属夹杂物和冲击韧性的影响

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摘要

A microalloying of the low-carbon and low-alloy cast steel was conducted with Zr, Ti, and Al that were added to the steel in four combinations. After heat treatment, the samples were tested for impact toughness at room temperature using the Charpy method. The highest values of impact toughness were obtained in the group treated with Zr, while Zr-Ti and Zr-Ti-Al groups showed moderate toughness values; the lowest values were observed in the Zr-Al group. Difference among the treatment groups was observed in the fracture mechanisms, morphology, and area distribution of the inclusions. High toughness values achieved in the trials treated with zirconium corresponded with smooth ductile fracture. The metal treated with a combination of zirconium and titanium had a relatively small area occupied by inclusions, but its toughness was also moderate. Lowest impact toughness values corresponded with the larger area occupied by the inclusions in the trials treated with aluminum. Also, a connection between the solubility product [Al][N] and impact toughness was established. The study also provides a qualitative description and quantitative analysis of the nonmetallic inclusions formation as a result of microalloying treatment. The precipitation sequence of the inclusions was described based on the thermochemical calculations for the nonmetallic compounds discovered in the experimental steel. A description of the size distribution, morphology, and composition was conducted for the oxides, nitrides, sulfides, and multiphase particles.
机译：用Zr，Ti和Al进行低碳和低合金铸钢的微合金化，以四种组合加入钢中。热处理后，使用夏比方法在室温下测试样品进行冲击韧性。在用Zr处理的基团中获得了最高的冲击韧性值，而ZR-Ti和Zr-Ti-Al基团显示中等韧性值;在Zr-Al组中观察到最低值。在裂缝机制，形貌和夹杂物的分布中观察到治疗组之间的差异。用锆处理的试验中达到的高韧性值与平滑的延展性骨折相对应。用锆和钛合金处理的金属具有夹杂物占据的相对较小的面积，但其韧性也适中。最低冲击韧性值与用铝处理的试验中的夹杂物占据的较大面积相对应。而且，建立了溶解性产物[Al] [N]和冲击韧性之间的连接。该研究还提供了由于微合金处理而对非金属夹杂物形成的定性描述和定量分析。基于实验钢中发现的非金属化合物的热化学计算描述了夹杂物的沉淀序列。对氧化物，氮化物，硫化物和多相颗粒进行尺寸分布，形态和组合物的描述。

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