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Mechanical Characteristics of Steel01:18

Mechanical Characteristics of Steel

The mechanical characteristics of steel are assessed through various tests that evaluate its strength, toughness, and flexibility. These tests include tension, torsion, impact, bending, and hardness assessments, each providing crucial information about steel's suitability for specific applications.
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used to...

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Updated: Jun 23, 2026

Preparation and High-temperature Anti-adhesion Behavior of a Slippery Surface on Stainless Steel
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开发17-4 PH不钢用于低功率选择性激光烧结.

Yu-Deh Chao1,2, Shu-Cheng Liu1,2, Fu-Lin Chen1,2

  • 1High Speed 3D Printing Research Center, National Taiwan University of Science and Technology, No. 43, Sec. 4, Keelung Rd., Taipei 106, Taiwan.

Materials (Basel, Switzerland)
|January 25, 2025
PubMed
概括

本研究展示了使用低功率激光系统和新型金属聚合物复合材料制造金属元件. 该工艺产生高密度的17-4 PH不钢零件,具有出色的机械性能.

关键词:
17-4 PH不钢粉末可以使用.选择性激光烧结是一种选择性的激光烧结.收缩分析是一种分析.拉力强度 拉力强度是什么

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Last Updated: Jun 23, 2026

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科学领域:

  • 材料科学 材料科学 材料科学
  • 增材制造 增材制造 增材制造
  • 机械工程 机械工程

背景情况:

  • 选择性激光烧结 (SLS) 是一个关键的聚合物增材制造 (AM) 技术.
  • 传统的SLS仅限于聚合物材料.
  • 通过AM制造金属元件通常需要高功率激光器和专用设备.

研究的目的:

  • 开发一种金属聚合物复合材料,用于使用低功率激光SLS系统制造金属元件.
  • 通过这种新的方法,研究生产17-4 PH不钢零件的可行性.
  • 描述由此产生的金属元件的机械性能和密度.

主要方法:

  • 通过将17-4 PH不钢粉与聚氧甲 (POM) 和高密度聚乙烯 (HDPE) 混合,制备一个复合粉末.
  • 绿色零件使用Sinterit Lisa SLS系统 (5W,808nm激光) 制造,其打印参数优化 (140°C,35.87mJ/mm2,100μm层厚度).
  • 通过热脱脂去除聚合物粘合剂,然后进行高温烧结 (1180分钟1310°C),以获得固体金属组件.

主要成果:

  • 通过SLS工艺成功地生产出完全成型的绿色零件,其最大密度为3.61g/cm3.
  • 在烧结后,金属组件的密度达到7.57g/cm3 (理论密度的97%),平均收缩率为22%.
  • 最终组件的抗拉强度为605.64 MPa,硬度为HRC 14.8.8.

结论:

  • 低功率激光选择性激光烧结金属聚合物复合材料是生产密集金属元件的可行方法.
  • 这种技术为金属增材制造提供了具有成本效益,能效和高速的替代方案.
  • 该工艺可以容纳广泛的颗粒大小,提高其适用性并降低制造成本.