表面硬化对各向同性梁疲劳性能的影响

Q3 Engineering
Diagnostyka Pub Date : 2022-09-26 DOI:10.29354/diag/154901
Sajjad H, Nasser, Qasim H. Bader
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引用次数: 1

摘要

本文对表面硬化对各向同性梁高周疲劳行为的影响进行了实验研究。梁由低碳钢(St 44-2)制成。所用的表面处理方法有包渗碳和碳氮共渗。实验工作包括机械试验、表面热处理、疲劳试验和显微镜检查。表面硬化是通过在925°C的温度下采用包埋渗碳工艺,保持时间变化(2、4和6小时),然后进行淬火和回火工艺,以及在800°C温度下采用碳氮共渗工艺,持续0.5、1和1.5小时,然后直接在水中淬火。疲劳试验采用悬臂旋转弯曲系统进行。实验疲劳试验结果表明,不同的行为取决于表面热处理和浸泡时间。研究结果表明,碳氮共渗对疲劳强度和寿命的影响比包埋渗碳处理的试样大。此外,随着浸泡时间的增加,这两种表面热处理的疲劳寿命都会增加。研究发现,随着硬度增加到1644.62HV,使用碳氮共渗工艺硬化的试样获得了更高的表面硬度,而未处理的试样为293HV。与采用包埋渗碳硬化的对比
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Surface hardening effect on the fatigue behavior of isotropic beam
This paper is to present an experimental study of the impact of surface hardening on the high-cycle fatigue behavior of an isotropic beam. The beams made from low carbon steel (St 44-2). Surface treatments used are pack carburizing and carbonitriding. The experimental work included mechanical test, surface heat treatment, fatigue test and Microscopic inspection. The surface hardening was done by using pack-carburizing process at a temperature of 925°C holding time variation (2, 4, and 6hr) followed by quenching and tempering process, and using the carbonitriding process at a temperature of 800°C and for periods (0.5, 1 and 1.5hr) then quenching directly in water. The fatigue test was carried out by a cantilever rotating-bending system. The results of an experimental fatigue test indicate that various behaviors depend on surface heat treatment and time soaking. The findings indicate that carbonitriding has a greater impact on the fatigue strength and life than the specimen has been treated with pack carburizing. In addition, as the time soaking increase, the fatigue life will increase for both types of surface heat treatments. It was found that the specimens that were hardened using the carbonitriding process achieved a higher surface hardness as the hardness increased to 1644.62HV, while the untreated specimens were 293HV. Compared with the hardening using the pack carburizing
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来源期刊
Diagnostyka
Diagnostyka Engineering-Mechanical Engineering
CiteScore
2.20
自引率
0.00%
发文量
41
期刊介绍: Diagnostyka – is a quarterly published by the Polish Society of Technical Diagnostics (PSTD). The journal “Diagnostyka” was established by the decision of the Presidium of Main Board of the Polish Society of Technical Diagnostics on August, 21st 2000 and replaced published since 1990 reference book of the PSTD named “Diagnosta”. In the years 2000-2003 there were issued annually two numbers of the journal, since 2004 “Diagnostyka” is issued as a quarterly. Research areas covered include: -theory of the technical diagnostics, -experimental diagnostic research of processes, objects and systems, -analytical, symptom and simulation models of technical objects, -algorithms, methods and devices for diagnosing, prognosis and genesis of condition of technical objects, -methods for detection, localization and identification of damages of technical objects, -artificial intelligence in diagnostics, neural nets, fuzzy systems, genetic algorithms, expert systems, -application of technical diagnostics, -diagnostic issues in mechanical and civil engineering, -medical and biological diagnostics with signal processing application, -structural health monitoring, -machines, -noise and vibration, -analysis of technical and civil systems.
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