在重型造中使用中型合金钢中的欧特基碳化物溶解行为
Yu Ji1, Tingting Xu2, Caiyan Zhao2
1School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China.
Materials (Basel, Switzerland)
|October 28, 2023
概括
重型造钢 (MoVW2和MoV) 经过热处理,研究了碳化碳的溶解. 溶解导致均的球形碳化物和由于固溶液的强化而增加的硬度.
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
- 物理金学 物理金学
背景情况:
- 欧特基碳化物对重型造品的机械性能有很大的影响.
- 了解碳化物溶解对于优化钢材性能至关重要.
研究的目的:
- 为了研究在MoVW2和MoV钢中优化碳化物的溶解行为.
- 分析溶解对微观结构和硬度的影响.
- 探索合金元素和固化的碳化物形成中的作用.
主要方法:
- 在1230°C高温扩散处理,长达100小时.
- 微结构分析使用扫描电子显微镜与电子反射散射衍射 (SEM+EBSD).
- 使用ImageJ进行图像分析和使用Thermo-Calc.进行热力学计算.
主要成果:
- 粗粗的欧特基碳化物逐渐溶解,变得更加均和球形.
- 持有50小时后,钢的硬度显著增加,这是由于固体溶液的强化.
- 在MoVW2钢中较高的 (W) 含量促进了M6C碳化物沉.
- 由于碳 (C) 和 (Cr) 丰富,M7C3碳化物在晚期固化过程中沉在两种钢中.
结论:
- 乙碳化物溶解提炼了微观结构,并提高了MoVW2和MoV钢的硬度.
- 和固化条件在碳化物沉和稳定性中起着关键作用.
- 这些发现为量身定制热处理提供了洞察力,以改善重型造性能.
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