钢中微米夹杂物分布特征及其对力学性能的影响

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中图分类号：TB302 文献标志码：A 文章编号：1002-4026（2025）06-0077-09

开放科学（资源服务）标志码（OSID）

Distribution of micron inclusions in steel and their impact

onits mechanical properties

WANG Zhengci'，LIU Long'，TIAN Linan¹*，LIU Zhe²，SUN Wei² LIU Yongchao²，WEN Peijian²，ZHANG Qing²

（1.Shandong Analysis and Test Center， Qilu University of Technology（Shandong Academy of Sciences），Jinan 250014，China；2.Jinlei Technology Co.，Ltd.， Jinan ，China）

Abstract：Under the currnt technological conditions，inclusions have become inevitable insteel.To investigate the impact of micron inclusions on the mechanical properties of metals，vacuum arcmelting was used to control the mass fractions（contents） of micron A12O3 powder at 0% ， 0.2% ， 0.6% ， 1% ，and 2% ，thereby preparing samples with different contents of micron inclusions.Statistical analysis of inclusion sizes via computedtomography imaging and scanning electron microscopy（SEM） revealed that most inclusions had a size of <5μm .Moreover，the quantity of inclusions proportionally increased with increasing A12O3 content. Mechanical properties were tested using the indentation method; thetestresultsindicated that theaditionofacertainamountof microninclusionscanienhance the mechanical performance of a metal. However，when the A12O3 content exceeded 1% ，the tensile strength increase slowed down and the yield strength decreased. SEM observations revealed that at high A12O3 content，inclusions tended to agglomerate into largeinclusionsorclusters，which caused local stress concentration.Thisphenomenon in turnnegativelyaffcted the strengthening effect of the micron inclusions on the mechanical properties of the investigated metal.

Keywords：micron inclusions；inclusion statistics；scanning electron microscopy；indentationmethod；mechanical properties

钢铁材料在冶炼过程或凝固过程中，由于受炼钢工艺条件的影响，凝固后的铸坏中存在氧化物、硫化物、氮化物等非金属夹杂物[1]。（剩余9794字）