Effect of preliminary heat treatment, cold deformation, and electric heating on the mechanical properties of steel 30KhGSA

1977 ◽  
Vol 19 (12) ◽  
pp. 1059-1061
Author(s):  
N. M. Fonshtein ◽  
B. G. Sazonov ◽  
L. A. Panteleeva
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Cold Deformation ◽  
Electric Heating ◽  
Preliminary Heat Treatment ◽  
Steel 30Khgsa

Effect of cold deformation and heat treatment on the structure and mechanical properties of bonze Br013 alloyed with titanium and cerium

1990 ◽  
Vol 32 (11) ◽  
pp. 873-876
Author(s):  
V. F. Shamrai ◽  
Yu. V. Efimov ◽  
V. A. Lykhin ◽  
V. V. Nesgovorov ◽  
M. I. Timofeev ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Cold Deformation ◽  
Deformation And Heat Treatment

The Role of Preliminary Heat Treatment in the Formation of Ultrafine-Grained Structure in the Implementation of the Combined Process "Rolling - Equal Channel Angular Pressing"

2016 ◽  
Vol 879 ◽  
pp. 1093-1098 ◽  
Author(s):  
Abdrakhman Naizabekov ◽  
Sergey Lezhnev ◽  
Evgeniy Panin ◽  
Irina Volokitina
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Preliminary Heat Treatment ◽  
Combined Process ◽  
Ultrafine Grained Structure ◽  
Angular Pressing ◽  
Ultrafine Grained ◽  
High Level ◽  
Evolution Of Microstructure ◽  
The Impact

In recent years was developed a number of new methods of processing of metals by pressure aimed at obtaining metal with sub-ultrafine-grained structure, the basic principle of which is the realization in the process of deformation of simple shear scheme. One of those ways is pressing blanks in matrices of different designs, in particular in equal-channel step die. However, this method has a significant disadvantage - it can’t be used for deforming of lengthy billets. Another disadvantage of this method of deformation is that it does not provide the continuity of the pressing process. For removing these shortcomings at the Department "Metal Forming" of Karaganda state industrial University was developed a combined process "Rolling-pressing" using equal channel step matrix with calibrated and smooth rolls. This work investigates the impact of the proposed combined process "rolling-pressing", and also preliminary and final heat treatment during the implementation of this combined process on the evolution of microstructure and mechanical properties of copper alloy. Obtained in the course of these studies, the results indicate that the proposed technology can be recommended for implementation in production to produce blanks of ferrous and non-ferrous metals and alloys with ultrafine-grained structure and high level of mechanical properties.

Mechanical Properties and Corrosion Behavior of a Beta Titanium Alloy

2006 ◽  
Vol 324-325 ◽  
pp. 695-698 ◽  
Author(s):  
Yu Feng Zheng ◽  
Bao Lai Wang
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Corrosion Resistance ◽  
Ph Value ◽  
Biomedical Application ◽  
Artificial Saliva ◽  
Cold Deformation ◽  
Open Circuit ◽  
Beta Titanium Alloy ◽  
Beta Titanium

Recently, people devote to the development of beta titanium alloys which have better biocompatibility because of the addition of Mo, Nb, Ta, Zr, Sn, et al. In this paper, the effects of heat treatment and cold roll deformation on the mechanical properties of the Ti-11.3Mo-6.6Zr-4.3Sn alloy (TMZS) are investigated by tensile test. The results show that the excellent combination of strength and ductility can be obtained by heat treatment or cold deformation. The TMZS alloy can obtain intermediate modulus, stronger than nickel titanium, weaker than stainless steel. The corrosion resistance of this alloy in the Hank's solution, 0.9% NaCl physiological solution and artificial saliva with different pH values at 37 are investigated by means of open-circuit potential (OCP), Tafel and potentiodynamic anodic polarization techniques. All the test results suggest that the TMZS alloy has excellent corrosion resistance in the three simulated solutions especially in the artificial saliva and has a large potential for biomedical application. In addition, the pH value and simulated solutions have some influence on the corrosion resistance of the TMZS alloy.

scholarly journals Single-Step Heat Treatment for the Restoration of Mechanical Properties of Cold-Strained Mining Support Steel 31Mn4

2020 ◽  
Vol 66 (12) ◽  
pp. 687-696
Author(s):  
Gorazd Lojen ◽  
Janez Mayer ◽  
Tonica Bončina ◽  
Franc Zupanič
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Cold Deformation ◽  
Charpy Impact ◽  
Tensile Tests ◽  
Single Step ◽  
Subcritical Annealing ◽  
Cost Efficient ◽  
Step Heat Treatment ◽  
Carbide Particles

The steel 31Mn4+QT630 is used frequently for mining support arches. The supports are cold strained, first during service, and again by re-rolling prior to reinstallation, which results in strain hardening and a loss of ductility. Consequently, many of the rerolled arch-segments are not suitable for reinstallation because their mechanical properties are inadequate. The objective of this work was to assess the feasibility of restoration of the required mechanical properties by means of a cost-efficient single step heat treatment. Specimens were cold deformed to different degrees in the range 0 % to 45 % to establish the relation between the degree of cold deformation and the hardness. Differently strain hardened specimens were subjected to subcritical annealing at temperatures 450 °C to 700 °C in the duration 0.5 h to 8 h to determine a suitable time-temperature combinations. Microstructures and mechanical properties were investigated of as-received, cold strained and recrystallized specimens. Tests performed were optical microscopy, scanning electron microscopy, tensile tests, hardness measurements and Charpy impact tests. Elongation at break of the as-received material was below the requirements of the applicable standard, and its microstructure contained significant fractions of pre-eutectoid ferrite and pearlite. Upon cold straining, hardness increased by approximately 2 HV per 1 % of strain. After one-hour recrystallization at 600 °C to 620 °C, the microstructure consisted of a ferritic matrix containing evenly dispersed globular carbide particles. The original ductility was restored, while the elongation, yield strength, and hardness were higher than in the as-received condition. These results confirmed that it is feasible to restore the original mechanical properties of heavily strained profiles with an adequate single-step heat treatment. Furthermore, they indicated that it should be possible to recover the required properties of inhomogeneously strained material with the same set of well optimized heat treatment parameters. Consequently, it should be possible to increase the reuse rate and to decrease the costs for new support arches significantly.

scholarly journals Influence of Physicochemical Methods of Treatment on Structural And Mechanical Properties of High-Viscosity Oils of Udmurtia

2020 ◽  
Vol 130 (5) ◽  
pp. 26-31
Author(s):  
L. V. Ivanova ◽  
◽  
V. К. Miller ◽  
V. N. Koshelev ◽  
D. V. Repin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Disperse System ◽  
Group Composition ◽  
High Viscosity ◽  
Preliminary Heat Treatment ◽  
Mixed Composition ◽  
Physicochemical Methods ◽  
Oil Disperse System ◽  
Methods Of Treatment

The group composition, physicochemical and viscosity-temperature properties of paraffinic high-resinous high-viscosity and high-viscosity oils of Udmurtia deposits with structural-mechanical properties are investigated. It was established that the destruction energy of the supramolecular structure formed during cooling for the oil of the Mishkinsky field is 43.9 kJ/m3 , for the oil of the Kiengop field – 12.6 kJ/m3 . The use of physicochemical methods (heat treatment and dilution of a mixed composition with a hydrocarbon solvent) for regulating the rheological characteristics of oils can significantly reduce the structure of the oil disperse system, which corresponds to a fracture energy of not more than 1 kJ/m3. It was found that the relaxation of the structural and mechanical properties of the oil disperse system after its preliminary heat treatment proceeds slowly.

Crystallization of MgO • Al2 • SiO2 • ZrO2 glasses

1986 ◽  
Vol 44 ◽  
pp. 440-441
Author(s):  
M. A. McCoy
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Powder Processing ◽  
Glass Composition ◽  
Ceramic Powder ◽  
Transformation Toughening ◽  
Ceramic Powder Processing ◽  
Processing Techniques ◽  
Ceramic Matrices

Transformation toughening by ZrO2 inclusions in various ceramic matrices has led to improved mechanical properties in these materials. Although the processing of these materials usually involves standard ceramic powder processing techniques, an alternate method of producing ZrO2 particles involves the devtrification of a ZrO2-containing glass. In this study the effects of glass composition (ZrO2 concentration) and heat treatment on the morphology of the crystallization products in a MgO•Al2•SiO2•ZrO2 glass was investigated.

INFLUENCE THE QUENCHING AND TEMPERING ON THE MICROSTRUCTURE, MECHANICAL PROPERTIES AND SURFACE ROUGHNESS, OF MEDIUM CARBON STEEL

2018 ◽  
Vol 18 (1) ◽  
pp. 125-135
Author(s):  
Sattar H A Alfatlawi
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Surface Roughness ◽  
Carbon Steel ◽  
Cold Water ◽  
Medium Carbon Steel ◽  
Medium Carbon ◽  
Heating And Cooling ◽  
Treatment Processes ◽  
Quenching And Tempering

One of ways to improve properties of materials without changing the product shape toobtain the desired engineering applications is heating and cooling under effect of controlledsequence of heat treatment. The main aim of this study was to investigate the effect ofheating and cooling on the surface roughness, microstructure and some selected propertiessuch as the hardness and impact strength of Medium Carbon Steel which treated at differenttypes of heat treatment processes. Heat treatment achieved in this work was respectively,heating, quenching and tempering. The specimens were heated to 850°C and left for 45minutes inside the furnace as a holding time at that temperature, then quenching process wasperformed in four types of quenching media (still air, cold water (2°C), oil and polymersolution), respectively. Thereafter, the samples were tempered at 200°C, 400°C, and 600°Cwith one hour as a soaking time for each temperature, then were all cooled by still air. Whenthe heat treatment process was completed, the surface roughness, hardness, impact strengthand microstructure tests were performed. The results showed a change and clearimprovement of surface roughness, mechanical properties and microstructure afterquenching was achieved, as well as the change that took place due to the increasingtoughness and ductility by reducing of brittleness of samples.

Sign in / Sign up

Export Citation Format

Share Document