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化H13工具钢的疲劳性能 预先处理了细颗粒磨
Hung-Chi Lee1, Tai-Cheng Chen2,3, Wen-Han Chen4
1Department of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung 202301, Taiwan.
Materials (Basel, Switzerland)
|September 13, 2025
概括
有复合层 (CL) 和没有复合层 (CL) 的化H13钢具有相似的疲劳性能. 疲劳强度显著提高,当裂来自地表内嵌入,而不是表面时.
科学领域:
- 材料科学 材料科学 材料科学
- 表面工程是什么?表面工程是什么?
- 机械工程 机械工程
背景情况:
- H13钢是要求苛刻的应用程序的关键工具钢.
- 表面处理,如化,可以提高疲劳性能.
- 复合层 (CL) 在疲劳行为中的作用需要进一步研究.
研究的目的:
- 为了评估化H13钢的疲劳性能,有或没有复合层 (CL).
- 为了研究潜在对微观结构,病例深度和疲劳行为的影响.
- 为了确定裂纹发作点及其对疲劳强度的影响.
主要方法:
- 在精细颗粒除 (FPP) 后,在两个电位 (KN = 0.8 - LN,KN = 2.0 - HN) 上对H13钢进行气体化.
- 微结构分析和测量病情深度和残余应力.
- 高周期疲劳测试,以评估疲劳强度和裂纹启动行为.
主要成果:
- 在HN样本上形成了一个化合物层 (CL),而LN样本仍然没有CL.
- 在钢基板表面发起的疲劳裂,LN和HN样品的残余应力场和疲劳性能相似.
- 在高循环疲劳中,地表内含有物作为裂起源,与基板相比,在两种化物条件下显著改善疲劳强度.
- 在高应力 (>1100 MPa) 时,HN样品的裂纹启动转移到外部表面;没有发生CL分裂.
结论:
- 有或没有CL的化H13钢具有相似的疲劳性能.
- 在高循环状态下改善疲劳寿命的基础上,地表内含有非常重要.
- 在测试条件下,复合层没有对疲劳性能产生负面影响,也没有显示出故障迹象.
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