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相关概念视频

Plastic Deformations01:14

Plastic Deformations

747
It is essential to understand how structural members behave under plastic deformation when the bending stress exceeds the material's yield strength. This state of deformation permanently alters the shape of the member, in contrast to the linear elastic behavior observed before yielding. The strain at any point in the member is expressed in terms of maximum strain. Notably, the neutral axis, which coincides with the centroid during elastic bending, shifts away from the centroid under plastic...
747
Plastic Deformations01:19

Plastic Deformations

674
Plastic deformation represents a fundamental concept in materials science, which explains the irreversible change in the shape of a material when it experiences stress beyond its elastic capability. This phenomenon is important in structural engineering, especially in designing and analyzing cantilever beams—structures that are securely fixed at one end and bear loads at the opposite end. When these beams are subjected to loads within their elastic range, they will return to their...
674

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相关实验视频

Updated: May 7, 2026

A Soft Tooling Process Chain for Injection Molding of a 3D Component with Micro Pillars
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使用增材制造和表面工程的注塑模行为.

Marcelo José de Lima1, Jorge Luis Braz Medeiros1, José de Souza1

  • 1Campus Carreiros, Federal University of Rio Grande (FURG), Av. Itália, Km 8, Rio Grande 96203-900, RS, Brazil.

Materials (Basel, Switzerland)
|September 13, 2025
PubMed
概括

使用激光粉床融合 (LPBF) 的金属增材制造创造了先进的压模组件. 与传统方法相比,这些组件提供了优越的热管理和耐用性.

关键词:
添加剂制造 添加剂制造 添加剂制造的注塑模具 的注塑模具形成的道形成了道.

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相关实验视频

Last Updated: May 7, 2026

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科学领域:

  • 材料科学与工程 材料科学与工程
  • 制造业 制造技术 制造技术
  • 部落学 (tribology) 是一个学科.

背景情况:

  • 有效的热管理和模具耐用性对于压造至关重要.
  • 传统的加工限制了冷却通道设计,导致热点和模具寿命缩短.
  • 增材制造为复杂的几何形状和提高模具性能提供了潜力.

研究的目的:

  • 为了评估压模组件的金属增材制造 (LPBF).
  • 为了比较LPBF制造的300等级钢插件与传统的H13工具钢.
  • 评估合规冷却通道和表面处理对模具性能的影响.

主要方法:

  • 使用激光粉床融合 (LPBF) 制造钢模组件.
  • 将部件加工到最终尺寸,并应用双重表面处理 (等离子体化 + CrAlN PVD 涂层).
  • 对热性能,尺寸稳定性,机械性能和耐磨性进行实验性评估.

主要成果:

  • 优化冷却的LPBF组件实现了更高的热效率.
  • 与H13插件相比,使用寿命延长了2.6×.
  • 观察到明显改善的硬度配置和耐磨性.

结论:

  • 增材制造克服了传统压模具生产的几何和热限制.
  • 量身定制的表面处理和优化的冷却设计提高了模具的可靠性和生产率.
  • LPBF为高性能压造模具提供了一个可行的解决方案.