scholarly journals A Review Article on Various Phytochemicals and Different Medicinal Activities of Haritaki.

2020 ◽  
Vol 5 (6) ◽  
pp. 1445-1447
Author(s):  
M. Franklin ◽  
P. Perumal ◽  
P. Keerthi Vasan
Keyword(s):  
Heat Treatment ◽  
Treatment Process ◽  
Cryogenic Treatment ◽  
Case Hardening ◽  
Heat Treatment Process ◽  
Deep Cryogenic Treatment ◽  
Entire Cross Section ◽  
Characterization Study ◽  
Before And After ◽  
Soaking Temperature

Heat treatment process is a resultant process to improve the mechanical and metallurgical properties of the material. Deep cryogenic treatment is not an alternative process to the heat treatment process it is a complimentary process to the heat treatment and it affects the entire cross section of the material. Deep cryogenic treatment is a heat treatment process where the material is subjected to comparatively extreme low temperature condition in order to enhance the mechanical and metallurgical behaviors of the material. Low alloyed case hardening steels used for manufacturing of parts which required to withstand high operating condition such as axle drives, gears & shafts. In this proposed work 20MnCr5 steel has been subjected to Deep Cryogenic Treatment at different soaking temperature and period. A comparative characterization study has to be conducted, before and after the cryogenic treatment, to investigate the behavior of materials.

scholarly journals Study on the Ignition Performance of TaN Transducer by Heat Treatment

CONVERTER ◽  
2021 ◽  
pp. 347-353
Author(s):  
Xiaoming Ren, Et al.
Keyword(s):  
Heat Treatment ◽  
Treatment Process ◽  
Heat Treatment Process ◽  
Ignition Voltage ◽  
Cooling Method ◽  
Heat Treated ◽  
Before And After ◽  
Film Transducer

In order to obtain good TaN film transducer and reduce its ignition voltage, the influence of the setting position and cooling method of the heat treatment process on the TaN film transducer were compared and analyzed. By measuring the square resistivity, SEM and XRD, the performance of the film before and after heat treatment were characterized. The ignition voltage of the TaN film transducer was tested, and the results showed that the ignition voltage of the heat-treated TaN film transducer could be reduced a lot. It provided a technical way for the micro-energy of MEMS pyrotechnics.

Study on Thickness of Low Carbon Steel in Rapid Cooling Process: A Short Review

2020 ◽  
Vol 4 (1) ◽  
pp. 52-59
Author(s):  
Siti Noradila Abdullah ◽  
Norazlianie Sazali ◽  
Ahmad Shahir Jamaludin
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Carbon Steel ◽  
Carbon Content ◽  
Treatment Process ◽  
Low Carbon Steel ◽  
Case Hardening ◽  
Heat Treatment Process ◽  
Low Carbon ◽  
Molecular Arrangement

For any process that engaged with changes of chemical properties and physical is a heat treatment process by cooling or heating a metal. The technique for heat treatment includes, case hardening, annealing, tempering and precipitation strengthening, quenching and tempering. The mechanical properties like hardness, toughness and ductility can be altered by intense heat treating on steel to produce different mechanical properties. This matters with the carbon content in low carbon steel such as mild steel with above 0.4% carbon, in Medium carbon steel with above 0.8% carbon, and in High Carbon Steel with up to 2% carbon content in steels. To change the characteristics of metals and alloys is by heat treatment process where by altering the diffusion and cooling rate within its microstructure to make them suitable for any kind of usage by changing the grain size at different phases and changing the molecular arrangement.

Wear Analysis of LM 25 (A356) Alloy Manufactured by Squeeze Casting

2017 ◽  
Vol 867 ◽  
pp. 157-164
Author(s):  
N. Nagendran ◽  
V.K. Shanmuganathan ◽  
N. Gayathri ◽  
G. Dinesh Ram
Keyword(s):  
Heat Treatment ◽  
Treatment Process ◽  
Squeeze Casting ◽  
A356 Alloy ◽  
Wear Test ◽  
Casting Process ◽  
Wear Behaviour ◽  
Heat Treatment Process ◽  
Wear Analysis ◽  
Before And After

Historically, the series of LM were developed for high strength, corrosion resistance, and good machinability for many applications. LM 25 Al-7Si-0.3Mg-0.5Fe alloy cylindrical shaped castings were manufactured successfully by Squeeze Casting process at high temperature and high pressure. The casting products were made by addition of nanoparticles and without nanoparticles. Heat treatment process was conducted at 490○C and metals was quenched at 30○C (water).Specimens were prepared with and without squeeze and stirrer. Wear test was carried out by, variation in load, and microstructure also studied. The results were compared before and after the heat treatment process for addition of nanoparticle and without nanoparticle. SEM analysis was made on worn surface of the wear specimens for different conditions to study the influence of different casting on the wear behaviour mechanism of the cast alloys. Surface roughness was evaluated before and after the wear analysis for various conditions.

The Research on Process of Deep Cryogenic Treatment for W4Mo3Cr4VSi HSS Drill

2010 ◽  
Vol 97-101 ◽  
pp. 457-460 ◽  
Author(s):  
Hong Juan Yan ◽  
Hong Hai Xu ◽  
Ying Liu
Keyword(s):  
Orthogonal Experiment ◽  
Cryogenic Treatment ◽  
Deep Cryogenic Treatment ◽  
Soaking Time ◽  
Experiment Method ◽  
Before And After ◽  
Orthogonal Experiment Method ◽  
Enhance Wear Resistance ◽  
Carbide Particles ◽  
Soaking Temperature

The Deep Cryogenic Treatment(DCT) process of W4Mo3Cr4VSi HSS was studied by orthogonal experiment method. The paper analysed the effect of various DCT process parameters on mechanical properties and observed microstructure before and after DCT treatment by the SEM. The results show that the effect of soaking temperature on the properties of drill is the first factor, the soaking time is second and the cooling rate is third. DCT enhances the transformation of austenite to martensite, and distributable carbide particles are precipitated from martensite. Therefore DCT increase hardness and enhance wear resistance of twist drill.

Effects of Different Heat Treatments on Transformation of Residual Austenite in Bearing Steel

2014 ◽  
Vol 670-671 ◽  
pp. 56-60
Author(s):  
H.S. Liu ◽  
M.H. Wang ◽  
X.Y. Ge ◽  
H.S. Luo
Keyword(s):  
Heat Treatment ◽  
Thermal Stability ◽  
Treatment Process ◽  
Cryogenic Treatment ◽  
Residual Austenite ◽  
Bearing Steel ◽  
Heat Treatment Process ◽  
Austenite Content ◽  
Quenching Process ◽  
Thermal Stability Of

The effect of heat treatment on transformation of residual austenite in bearing steel is studied, by adding the cryogenic treatment into the normal heat treatment process. The results indicate that the residual austenite content is decreased and the hardness is improved obviously, when putting the cryogenic treatment at -70°C or lower directly behind the quenching process. While when the tempering is added between quench and cryogenic treatment, the temperature of cryogenic treatment must be much lower than -70°C to offset the thermal stability of residual austenite, which is given by tempering.

scholarly journals Cryogenic Hardening of EN 19 Alloy Steel

2019 ◽  
Vol 8 (10) ◽  
pp. 158-161
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
Treatment Process ◽  
Cryogenic Treatment ◽  
Heat Treatment Process ◽  
Wear Protection ◽  
Hardening Process ◽  
Alloy Steels ◽  
Increase Wear Resistance ◽  
The Impact

This paper includes the study of heat treatment process that we carried out on En 19 steel in cryogenic atmosphere. Cryogenic treatments of alloy steels have been significantly increase wear resistance and toughness. These investigations of warmth treatment cryogenic medicines of amalgam steels have been asserted to altogether expand wear protection and sturdiness. Cryogenic handling is a supplementary procedure to customary warmth treatment process in steels. The cryogenic treatment on apparatus materials builds the life of instruments, gear, parts and materials by boosting elasticity, sturdiness and strength. This cryogenic hardening process is an onetime treatment influencing the whole part — not only the surface. Cryogenic treatment has been broadly embraced as a cost decrease and execution upgrading innovation. Cryogenic treatment is likewise utilized as an empowering innovation, when its pressure alleviating benefits are used to allow the manufacture (or machining) of basic resistance parts. With regards to great outcomes about the use of profound cryogenic treatment (DCT) on materials, the impact on the microstructure and properties (hardness, strength and the substance of held austenite) are observed to be made strides. Cryogenic treatment has been distinguished to improve the properties of Tools steels. It is discovered that cryogenic treatment confers almost 110% change in apparatus life.

Modeling the Effect of Chemistry Changes on Phase Transformation Timing, Hardness, and Distortion in Carburized 8620 Gear Steel

2021 ◽  
Author(s):  
Jason Meyer ◽  
Stefan Habean ◽  
Dan Londrico ◽  
Justin Sims
Keyword(s):  
Heat Treatment ◽  
Phase Transformation ◽  
Treatment Process ◽  
Low Cost ◽  
Low Carbon Steel ◽  
Alloy Element ◽  
Case Hardening ◽  
Heat Treatment Process ◽  
Low Carbon ◽  
Using Data

Abstract AISI 8620 low carbon steel is widely used due to its relatively low cost and excellent case hardening properties. The nominal chemistry of AISI 8620 can have a large range, affecting the phase transformation timing and final hardness of a carburized case. Different vendors and different heats of steel can have different chemistries under the same AISI 8620 range which will change the result of a well-established heat treatment process. Modeling the effects of alloy element variation can save countless hours and scrap costs while providing assurance that mechanical requirements are met. The DANTE model was validated using data from a previous publication and was used to study the effect of chemistry variations on hardness and phase transformation timing. Finally, a model of high and low chemistries was executed to observe the changes in hardness, retained austenite and residual stress caused by alloy variation within the validated heat treatment process.

scholarly journals Structural and Tribological Properties of Heat-Treated Stainless Steels against Abrasive and Lubricant Wear Conditions

Coatings ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1473
Author(s):  
Samah A. Al-Shelkamy ◽  
H. M. Abu Hashish ◽  
Amir A. Mahdy
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Tribological Properties ◽  
Treatment Process ◽  
Physical Nature ◽  
Parent Material ◽  
Operating Conditions ◽  
Heat Treatment Process ◽  
Heat Treated ◽  
Before And After

The current paper investigates the effect of the heat treatment process on three grades of stainless steel alloys against the abrasive and the lubricant wear conditions, using 25 wt.% glucose solution for the industrial agriculture applications. The heat treatment process was carried out for one hour at 900 ± 10 °C, followed by quenching with monograde motor oil and tempering for more than two hours at 200 ± 10 °C. Several analyses were conducted to estimate the final mechanical, surface morphological and tribological properties for the studied materials, before and after the heat treatment process. The heat-treated martensitic stainless steel grade exhibited superior wear resistance and higher hydrophobicity compared to the other two heat-treated austenite stainless steel grades. Therefore, the mechanism of the heat treatment process, the chemical and physical nature of the parent material, and the viscosity of the selected lubricant all influence the final behaviour of the studied material against the applied operating conditions for the selected application.

Optimization of Heat Treatment Process of ZE41A Magnesium Alloy Using Grey- Based Taguchi Method

2008 ◽  
Vol 3 (2) ◽  
pp. 63-69
Author(s):  
M. Sivapragash ◽  
◽  
V. Sateeshkumar ◽  
P.R. Lakshminarayanan ◽  
R. Karthikeyan ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Magnesium Alloy ◽  
Taguchi Method ◽  
Treatment Process ◽  
Heat Treatment Process

EFFECT ON HARDNESS and MICRO STRUCTURAL BEHAVIOUR OF TOOL STEEL AFTER HEAT TREATMENT PROCESS

2017 ◽  
Vol 4 (24) ◽  
Author(s):  
Karanbir Singh ◽  
Aditya Chhabra ◽  
Vaibhav Kapoor ◽  
Vaibhav Kapoor
Keyword(s):  
Heat Treatment ◽  
Empirical Study ◽  
Tool Steel ◽  
Treatment Process ◽  
Heat Treatment Process ◽  
Structural Behaviour ◽  
Treatment Processes ◽  
En 31

This study is conducted to analyze the effect on the Hardness and Micro Structural Behaviour of three Sample Grades of Tool Steel i.e. EN-31, EN-8, and D3 after Heat Treatment Processes Such As Annealing, Normalizing, and Hardening and Tempering. The purpose of Selecting Tool Steel is Because Tool Steel is Mostly Used in the Manufacturing Industry.This study is based upon the empirical study which means it is derived from experiment and observation rather than theory.

Sign in / Sign up

Export Citation Format

Share Document