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稀土元素 (La和Ce) 对U75V钢的微观结构和机械性能的影响
Mengqiang Hu1, Lei Ren1, Guangqian Feng2
1School of Rare Earth Industry, Inner Mongolia University of Science and Technology (IMUST), Baotou 014010, China.
稀土元素通过改进微观结构和增强机械特征来改善U75V钢的性能. 适度的添加提供了平衡的好处,但过量的添加可以降低低温下的性.
科学领域:
- 金工程 金工程 金工程
- 材料科学 材料科学 材料科学
背景情况:
- 在各种工业应用中,U75V钢是关键材料.
- 了解合金元素对钢材性能的影响对于材料优化至关重要.
研究的目的:
- 研究多元素稀土 (RE) 添加对U75V钢的微观结构和机械性能的影响.
- 为了确定最佳的RE含量,以提高钢材性能.
主要方法:
- 制作了三个U75V钢样本:一个没有RE,两个含有不同数量的兰 (La) 和 (Ce).
- 微观结构分析,观察含量和谷物精炼的变化.
- 机械性能测试包括硬度,抗拉强度,摩擦系数和不同温度下的冲击性.
主要成果:
- 在RE2O2S和RE2O2S-氧化物复合物中添加改性MnS和氧化含量,减少含量大小和数量.
- 微观结构的精细化,包括粒径和珍珠石间距,在RE添加时被观察到.
- 样本2 (0.0035%La,0.018%Ce) 在硬度 (+15.3%),拉伸强度 (+7.9%) 和摩擦系数 (-69.5%) 中显示出平衡的改善.
- 随着在室内和中度低温添加RE,冲击性增加,但样本3 (过度的RE) 在-60°C时显示冲击能量减少.
结论:
- 多元稀土添加对U75V钢产生积极影响,通过改进微观结构和增强机械性能.
- 适度的RE含量,如样本2中,提供了最平衡的性能改善.
- 过度的RE添加可以在冷条件下对冲击性产生负面影响,这凸显了受控添加的重要性.
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