通过微控制沉积轨迹改进304钢丝弧增材制造的微结构和性能
Huijing Zhang1,2, Weihang Liu3, Xiaohui Zhao2
1Key Laboratory of Advanced Structural Materials, Ministry of Education, School of Materials Science and Engineering, Jilin Provincial Key Laboratory of Advanced Materials Processing and Application for Rail Transit, Changchun University of Technology, Changchun 130012, China.
Materials (Basel, Switzerland)
|March 13, 2024
概括
电弧增材制造使用受控的摇摆火改进了沉积宽度和材料性能. 这种微控制沉积轨迹提高了304钢元件的微观结构和机械强度.
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
- 接技术 接技术
背景情况:
- 电弧增材制造 (WAAM) 是制造大型金属元件的一个有前途的技术.
- 控制弧形行为对于优化WAAM过程结果至关重要.
- 现有的方法在管理热量输入和实现所需的微观结构方面经常面临挑战.
研究的目的:
- 为了研究微控制沉积轨迹对304钢WAAM中弧形特征,微观结构和机械性能的影响.
- 为了评估周期性摆动的GMAW火在修改沉积过程中的有效性.
- 为了比较微控制沉积的结果与常见的薄壁沉积技术.
主要方法:
- 使用步进电机控制气体金属弧接 (GMAW) 火进行周期性摆动,创建微控制沉积轨迹.
- 分析弧形特性,包括弧形力和稳定性,在不同的摆动速度下.
- 检查沉积304钢元件的微观结构 (铁矿和奥氏体阶段) 和机械性能 (拉伸强度,延伸).
- 将微控制薄壁沉积元件与通过普通薄壁沉积产生的元件进行比较.
主要成果:
- 与常见方法相比,微控制沉积轨迹分散弧力,减少热量输入和增加沉积宽度.
- 增加的摆动速度导致更高的弧心力,可能导致弧心不稳定和喷.
- 摆动的弧度促进了池的动,有助于气体逃逸和微观结构的改进.
- 微观结构从状演变为白状铁和奥氏体,随着摆动速度的增加 (高达800°/s).
- 微控制沉积元件表现出优越的拉伸强度和延伸.
结论:
- 微控制沉积轨迹为增强304钢WAAM提供了一种可行的方法.
- 优化的摆动速度可以改善微观结构和机械性能,从而提高组件性能.
- 这种技术有效地改进了微观结构并增加了沉积宽度,与传统的WAAM方法相比具有优势.
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