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摆弧 SAW 硬面层的微观结构和硬度特征
Zhengyu Zhu1,2, Maoyang Ran1, Xuyang Li1
1Provincial Key Lab of Advanced Welding Technology, School of Materials Science and Engineering, Jiangsu University of Science and Technology, 666 Changhui Road, Zhenjiang 212100, China.
Materials (Basel, Switzerland)
|May 25, 2024
概括
一种新的摇摆弧潜弧接 (SA-SAW) 工艺改善了钢卷上的硬面层. 这种方法减少了硬度的变化,防止了缺陷,并提高了滚筒的可用性.
科学领域:
- 材料科学 材料科学 材料科学
- 制造业 工程 制造工程
- 金工业是金工业的一个方面.
背景情况:
- 在钢铁制造业中,热备用卷需要硬化,以修复磨损.
- 波纹槽缺陷是由于传统弧形硬面层的硬度不均而产生的.
- 这些缺陷损害了卷轴的功能完整性和使用寿命.
研究的目的:
- 引入和评估一种新的旋弧潜弧接 (SA-SAW) 工艺.
- 为了解决硬面层硬度分布不均的问题.
- 为了改善修复卷的微观结构和硬度均性.
主要方法:
- 对潜弧接 (SAW) 和SA-SAW硬面层的微观结构和硬度的实验研究.
- 分析自我温和效应,受热影响区域 (HAZ) 和谷物结构.
- 在SAW和SA-SAW工艺之间对硬度分布和均性的比较分析.
主要成果:
- 一个自我和效应精炼了SAW和SA-SAW的特定区域中的谷物.
- 柱状颗粒在所有区域形成,颗粒最细在自化区 (STZ),最粗在HAZ.
- SA-SAW通过减少HAZ中的炼和均分配热量来增强微观结构的均性.
- SA-SAW实现了更均的硬度分布 (<80 HV0.5差异),比SAW提高了约38.5%.
结论:
- 该SA-SAW工艺有效地减轻了硬面层的硬度分布不均.
- 改进的微观结构均性和均硬度增强了SA-SAW用于滚筒维修的实用性.
- 这一新工艺为防止缺陷和延长钢卷的使用寿命提供了可行的解决方案.
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