A Study on stress relief heat treatment (Report 1)

1967 ◽  
Vol 36 (2) ◽  
pp. 140-145
Author(s):  
Zinkichi Tanaka ◽  
Tadayoshi Obata
Keyword(s):  
Heat Treatment ◽  
Stress Relief

A Study on Stress Relief Heat Treatment (Report 4)

1970 ◽  
Vol 39 (1) ◽  
pp. 49-54 ◽  
Author(s):  
Jinkichi Tanaka ◽  
Tadayoshi Obata
Keyword(s):  
Heat Treatment ◽  
Stress Relief

Optimum Time and Temperature for Stress Relief Heat Treatment of Stainless Steel Wire

1973 ◽  
Vol 52 (6) ◽  
pp. 1171-1175 ◽  
Author(s):  
Michael R. Marcotte
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Steel Wire ◽  
Stress Relief ◽  
Stainless Steel Wire ◽  
Optimum Time ◽  
Dependent Variables

With the use of springback and recovery as dependent variables, the effects of time and temperature of stress relief heat treatment of stainless steel wire were studied. Stainless steel springs exposed to a stress relief heat treatment of 750 F for 11 minutes appear to have significantly improved spring properties.

scholarly journals FEATURES OF FORMATION OF CRYSTALLOGRAPHIC TEXTURE AND PROPERTIES IN Ti-3Al-2.5V TITANIUM ALLOY DURING TUBES MANUFACTURE

2019 ◽  
pp. 105-112
Author(s):  
V.S. Vakhrusheva ◽  
N.V. Hruzin ◽  
D.G. Malykhin
Keyword(s):  
Heat Treatment ◽  
Reduction Rate ◽  
Stress Relief ◽  
Tangential Component ◽  
Maximum Amount ◽  
Formation Processes ◽  
Texture Formation ◽  
Large Share ◽  
Main Factors ◽  
Diameter Reduction

Texture formation processes at all technological stages of tube manufacture were considered. It has been established that at the stage of hot deformation and manufacture of TREX tubes, tangential and radial textures are formed, a large share of tangential component of the texture. Influence of main factors of the technological process on formation of texture and properties was established. Conditions for formation of a maximum amount of radial texture in tubes which ensure improvement of service properties of tubes were determined. To create maximum amount of radial texture in tubes, total reduction rate in passes and the wall to diameter reduction ratio (factor Q) are important. The reduction rate should be increased, especially in the last passes, to 75…85%. Heat treatment (stress relief annealing) practically does not change the tube texture.

New Results of the Heat-Treated CuZn39Pb3 Brass Behavior and Resistance to Cavitation Erosion

2021 ◽  
Vol 890 ◽  
pp. 173-180
Author(s):  
Ilare Bordeaşu ◽  
Nicușor Alin Sîrbu ◽  
Iosif Lazăr ◽  
Ion Mitelea ◽  
Cristian Ghera ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Cavitation Erosion ◽  
Stress Relief ◽  
Air Cooling ◽  
Water Cooling ◽  
Characteristic Parameters ◽  
Volume Heat ◽  
Heat Treated ◽  
Hardness Increase

The paper presents the results of the behavior and resistance to the erosion by vibrating cavitation of the CuZn39Pb3 brass, obtained by quenching the volume heat treatment from 800°C with water cooling, followed by the stress-relief to 250°C, with air cooling. Comparison with both the delivery status and the naval brass (used for ship propellers), based on the characteristic parameters values, recommended by the ASTM G32 standards and used in the Cavitation Laboratory of the Polytechnic University of Timisoara, shows that the hardness increase resulted from the heat treatment led to a significant increase of resistance to vibrating cavitation.

scholarly journals The Influence of the Post-Weld Heat Treatment on the Microstructure of Inconel 625/Carbon Steel Bimetal Joint Obtained by Explosive Welding

Metals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 246 ◽  
Author(s):  
Robert Kosturek ◽  
Marcin Wachowski ◽  
Lucjan Śnieżek ◽  
Michał Gloc
Keyword(s):  
Heat Treatment ◽  
Diffusion Zone ◽  
Explosive Welding ◽  
Stress Relief ◽  
Scanning Transmission Electron Microscope ◽  
Post Weld Heat Treatment ◽  
Inconel 625 ◽  
Scanning Transmission ◽  
Inconel 625 Alloy ◽  
Weld Heat

Inconel 625 and steel P355NH were bonded by explosive welding in this study. Explosively welded bimetal clad-plate was subjected to the two separated post-weld heat treatment processes: stress relief annealing (at 620 °C for 90 min) and normalizing (at 910 °C for 30 min). Effect of heat treatments on the microstructure of the joint has been evaluated using light and scanning electron microscopy, EDS analysis techniques, and microhardness tests, respectively. It has been stated that stress relief annealing leads to partial recrystallization of steel P355NH microstructure in the joint zone. At the same time, normalizing caused not only the recrystallization of both materials, but also the formation of a diffusion zone and precipitates in Inconel 625. The precipitates in Inconel 625 have been identified as two types of carbides: chromium-rich M23C6 and molybdenum-rich M6C. It has been reported that diffusion of alloying elements into steel P355NH takes place along grain boundaries with additional formation of voids. Scanning transmission electron microscope observation of the grain microstructure in the diffusion zone shows that this area consists of equiaxed grains (at the side of Inconel 625 alloy) and columnar grains (at the side of steel P355NH).

Combustion of finned steel tubing during stress relief heat treatment

1986 ◽  
Vol 4 (3) ◽  
pp. 265-271 ◽  
Author(s):  
A. A. Johnson ◽  
J. A. von Fraunhofer ◽  
E. W. Jannett
Keyword(s):  
Heat Treatment ◽  
Stress Relief ◽  
Steel Tubing

The role of addition of Ni on the microstructure and mechanical behaviour of C-Mn weld metals

Exacta ◽  
2008 ◽  
Vol 5 (1) ◽  
Author(s):  
Vicente Braz da Trindade ◽  
João Da Cruz Payão ◽  
Luís Felile Guimarães Souza ◽  
Ronaldo Da Rocha Paranhos
Keyword(s):  
Heat Treatment ◽  
Weld Metal ◽  
Nickel Content ◽  
Stress Relief ◽  
Impact Testing ◽  
Microstructural Refinement ◽  
Weld Metals ◽  
The Impact ◽  
Submerged Arc

The aim in this work is to study the influence of nickel content (as-welded state and after stress relief heat treatment) on the microstructure and toughness of CMn weld metals obtained with submerged arc welding. The nickel content vary between 0.50 wt.% and 3.11 wt.%. The microstructures were observed using optical microscopy (OM) and scanning electron microscopy (SEM). The toughness was evaluated by Charpy-V impact testing in samples cut transversally to the weld bead. The impact energy showed that nickel content up to 1 wt.% improves the toughness due to the increase of the acicular ferrite (AF) content and microstructural refinement. On the other hand, higher nickel contents have a deleterious effect on the toughness due to the presence of the microconstituent martensite-austenite (M-A) in the weld metal. The stress relief heat treatment did not improve too much the weld metal toughness, even the M-A suffering decomposition (ferrite+carbide). This may be explained by the precipitation of carbides along the boundaries of the ferrite.

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