Influence of heat treatment and surface hardening on the fatigue resistance of constructional steel parts

1985 ◽  
Vol 27 (8) ◽  
pp. 601-604
Author(s):  
M. Ya. Belkin ◽  
L. M. Belkin
Keyword(s):  
Heat Treatment ◽  
Fatigue Resistance ◽  
Surface Hardening ◽  
Constructional Steel

Heat Treatment

2013 ◽  
pp. 271-324
Keyword(s):  
Heat Treatment ◽  
Surface Hardening ◽  
Precipitation Hardening ◽  
Temper Embrittlement ◽  
Induction Hardening ◽  
Heat Treatments ◽  
Metals And Alloys ◽  
Continuous Cooling Transformation Diagrams ◽  
Transformation Diagrams ◽  
Carbon System

Abstract This chapter discusses the processes used in manufacturing to thermally alter the properties of metals and alloys. It begins with a review of the iron-carbon system, the factors that affect hardenability, and the use of continuous cooling transformation diagrams. It then explains how various steels respond to heat treatments, such as annealing, normalizing, spheroidizing, tempering, and direct and interrupted quenching, and surface-hardening processes, such as flame and induction hardening, carburizing, nitriding, and carbonitriding. It also addresses the issue of temper embrittlement and discusses the effect of precipitation hardening on aluminum and other alloys.

scholarly journals Influence of Different Heat Treatments on Torsional and Cyclic Fatigue Resistance of Nickel–Titanium Rotary Files: A Comparative Study

2020 ◽  
Vol 10 (16) ◽  
pp. 5604 ◽  
Author(s):  
Gianluca Gambarini ◽  
Andrea Cicconetti ◽  
Dario Di Nardo ◽  
Gabriele Miccoli ◽  
Alessio Zanza ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Fatigue Resistance ◽  
Cyclic Fatigue ◽  
Sem Analysis ◽  
Nickel Titanium ◽  
Torsional Resistance ◽  
Heat Treated ◽  
Torsional Test ◽  
Time To Fracture ◽  
Flexural Resistance

Protaper Universal (PTU), Protaper Gold (PTG) (Maillefer, Ballaigues, CH), EdgeTaper (ET), and EdgeTaper Platinum (ETP) (Albuquerque, NM, USA) were tested for both torsional and flexural resistance. The aim of the present study was to evaluate the influence of proprietary heat treatment on the metallurgical properties of the aforementioned instruments. Four groups of 30 different instruments (size 20.07) were tested, then divided into two subgroups of 15 instruments—one for the cyclic fatigue test in a curved canal (90°—2 mm radius) at 300 rpm and 2.5 Ncm. The time to fracture (TtF) and fragment length (FL) were recorded. The other subgroup was subjected to the torsional test (300 rpm, 5.5 Ncm). The torque to fracture and TtF were recorded. All the instruments underwent a SEM analysis. The heat-treated instruments showed a significantly higher fatigue resistance than the non-heat-treated instruments (p < 0.05). No significant differences were found in the torsional resistance between the ET and PTU, and the ETP and PTG. However, when comparing all the groups, the heat-treated instruments showed less torsional resistance. The improvement from heat treatment was mainly found in the cyclic fatigue resistance.

Research Regarding Heat Treatment Influence on Properties of Chromic Steel 40H GOST 4543-71(DIN 41Cr4, Gb 40Cr, ASTM 5140) with Quenching in Polymer Solution with Purpose of Matching Tubing Pipes which Used in Oil and Gas Extraction

2018 ◽  
Vol 284 ◽  
pp. 402-407 ◽  
Author(s):  
S.N. Dzhabbarov ◽  
E.I. Pryakhin ◽  
A.A. Germanov
Keyword(s):  
Heat Treatment ◽  
Tensile Strength ◽  
Low Temperature ◽  
Oil And Gas ◽  
Constructional Steel ◽  
Gas Extraction ◽  
Research Activity ◽  
The Right ◽  
Production Tubing ◽  
Selection Of

According to GOST 4543-71, steel 40H refers to the group of chromium steels. It is a low-alloy constructional steel of pearlite class. The paper presents a theoretical and experimental research activity carried out in order to improve the properties of the 40H steel. The results permit the selection of the right heat-treatment parameters that offer the best combination between the yield strength, tensile strength, elongation, necking, impact strength at low temperature and hardness, in order to obtain a better behavior of the material for production tubing pipes in accordance with GOST 633 Tubing pipes and couplings for them, for strength group M and L.

scholarly journals Surface Hardening Treatment for Titanium Materials Using Ar-5%CO Gas in Combination with Post Heat Treatment under Vacuum

2009 ◽  
Vol 50 (12) ◽  
pp. 2763-2771 ◽  
Author(s):  
Y. Z. Kim ◽  
Takashi Konno ◽  
Taichi Murakami ◽  
Takayuki Narushima ◽  
Chiaki Ouchi
Keyword(s):  
Heat Treatment ◽  
Surface Hardening ◽  
Post Heat Treatment ◽  
Hardening Treatment ◽  
Co Gas
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