Combined Laser-Ultrasonic Surface Hardening Process for Improving the Properties of Metallic Products

2018 ◽  
pp. 97-107 ◽  
Author(s):  
Dmytro Lesyk ◽  
Silvia Martinez ◽  
Bohdan Mordyuk ◽  
Vitaliy Dzhemelinskyi ◽  
Oleksandr Danyleiko
Keyword(s):  
Surface Hardening ◽  
Laser Ultrasonic ◽  
Hardening Process

Theoretical justifi cation for use of combined methods for hardening of surfaces of machine parts in order to control their fretting resistance

2020 ◽  
pp. 339-342
Author(s):  
V.F. Bez’yazychny ◽  
M.V. Timofeev ◽  
R.V. Lyubimov ◽  
E.V. Kiselev
Keyword(s):  
Surface Layer ◽  
Fatigue Limit ◽  
Surface Hardening ◽  
Theoretical Justification ◽  
Hardening Process ◽  
Subsequent Application ◽  
Machine Parts ◽  
Combined Methods

The theoretical justification for the hardening process of the surface layer of machine parts for combined methods of surface hardening with subsequent application of strengthening coatings, as well as reducing or increasing the fatigue limit due to the fretting process is presented.

Surface Hardening of Steel Using Highly Concentrated Solar Energy Process

1999 ◽  
Vol 121 (1) ◽  
pp. 36-39 ◽  
Author(s):  
A. Ferriere ◽  
C. Faillat ◽  
S. Galasso ◽  
L. Barrallier ◽  
J-E. Masse
Keyword(s):  
Solar Energy ◽  
Surface Hardening ◽  
Solar Furnace ◽  
Small Scale ◽  
Single Spot ◽  
Energy Process ◽  
Concentrated Solar Energy ◽  
Compressive Stresses ◽  
Hardening Process ◽  
Continuous Scanning

A recent French contribution in the field of surface hardening of steel using concentrated solar energy is presented. Single spot and continuous scanning processes have been investigated in a small-scale solar furnace. Hardened regions of 0.5–1.5 mm in thickness have been obtained on specimens of carbon steel, resulting from the transformation hardening process. Compressive stresses are induced in the thermally affected layer, without tensile peak in the bulk.

scholarly journals Experimental Design and Performance Analysis in Plasma Arc Surface Hardening

2012 ◽  
pp. 57-75
Author(s):  
Mohd Idris Shah Ismail ◽  
Zahari Taha ◽  
Mohd Hamdi Abdul Shukor
Keyword(s):  
Surface Roughness ◽  
Experimental Design ◽  
Surface Hardening ◽  
Processing Parameters ◽  
Plasma Arc ◽  
Signal To Noise ◽  
Scanning Velocity ◽  
Hardening Process ◽  
Arc Current ◽  
And Performance

In this paper, the experimental design by using the Taguchi method was employed to optimize the processing parameters in the plasma arc surface hardening process. The evaluated processing parameters are arc current, scanning velocity and carbon content of steel. In addition, the significant effects of the relation between processing parameters were also investigated. An orthogonal array, signal-to-noise (S/N) ratio and analysis of variance (ANOVA) were employed to investigate the effects of these processing parameters. Through this study, not only the increasing in hardened depth and improvement in surface roughness, but the parameters that significantly affect on the hardening performance were also identified. Experimental results showed the effectiveness of this approach. Dalam kertas kerja ini, reka bentuk ujikaji menggunakan kaedah Taguchi digunakan untuk mengoptimumkan parameter pemprosesan dalam proses arka plasma pengerasan permukaan. Parameter pemprosesan yang dinilai adalah arus arka, halaju imbasan dan kandungan karbon dalam keluli. Sebagai tambahan, kesan-kesan penting yang lain seperti hubungan di antara parameter pemprosesan juga diselidiki. Tatasusunan ortogon, nisbah signal to noise (S/N) dan analisis varians (ANOVA) digunakan untuk mengkaji kesan parameter pemprosesan ini. Melalui kajian ini, bukan sahaja kedalaman pengerasan bertambah dan kekasaran permukaan lebih baik, malah parameter pemprosesan yang nyata sekali menpengaruhi prestasi pengerasan dikenal pasti. Hasil percubaan mengesahkan keberkesanan pendekatan ini.

Effect of the ion nitriding surface hardening process on fatigue behavior of AISI 4340 steel

2008 ◽  
Vol 59 (4) ◽  
pp. 351-358 ◽  
Author(s):  
Sule Yildiz Sirin ◽  
Kahraman Sirin ◽  
Erdinc Kaluc
Keyword(s):  
Surface Hardening ◽  
Fatigue Behavior ◽  
Ion Nitriding ◽  
Aisi 4340 Steel ◽  
Hardening Process ◽  
4340 Steel ◽  
Aisi 4340

Estimation of Surface Absorptivity and Surface Temperature in Laser Surface Hardening Process

1996 ◽  
Vol 35 (Part 1, No. 6A) ◽  
pp. 3658-3664 ◽  
Author(s):  
Yann-Shouh Sun ◽  
Cheng-I Weng ◽  
Tei-Chen Chen ◽  
Wang-Long Li
Keyword(s):  
Surface Temperature ◽  
Surface Hardening ◽  
Laser Surface ◽  
Hardening Process ◽  
Laser Surface Hardening

Study on the Surface Plasma Hardening Treatment and Anti-Penetration Mechanism of Armor Steel

2013 ◽  
Vol 690-693 ◽  
pp. 2141-2144
Author(s):  
Kai Ping Yu ◽  
Feng Wang ◽  
Rong Gang Chen ◽  
Jun Jun Zong
Keyword(s):  
Surface Hardening ◽  
Protective Layer ◽  
High Hardness ◽  
Surface Plasma ◽  
Hardening Process ◽  
Plasma Transferred Arc ◽  
Hardening Treatment ◽  
Penetration Ability ◽  
Penetration Mechanism ◽  
Armor Steel

Plasma surface hardening process was performed to improve the surface on the 22SiMn2TiB steel by plasma transferred arc. Experiments were carried out to characterize the hardening qualities. The anti-penetration ability and mechanism were analyzed, and hardness protective layer can improve greatly the ability of armor protection. The dual hardness armor steel composed of high hardness panel and basic backplane was developed based on the experimental results.

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