Influence of QLT treatment on microstructure and mechanical properties of a high nickel steel

2013 ◽  
Vol 213 (1) ◽  
pp. 120-128 ◽  
Author(s):  
S.J. Wu ◽  
G.J. Sun ◽  
Q.S. Ma ◽  
Q.Y. Shen ◽  
L. Xu
Keyword(s):  
Mechanical Properties ◽  
Nickel Steel ◽  
Microstructure And Mechanical Properties ◽  
High Nickel ◽  
High Nickel Steel

Thermal stabilization of austenite in a high-nickel steel

1977 ◽  
Vol 8 (9) ◽  
pp. 1449-1452 ◽  
Author(s):  
R. Brook ◽  
T. K. Sanyal ◽  
G. White
Keyword(s):  
Thermal Stabilization ◽  
Nickel Steel ◽  
High Nickel ◽  
High Nickel Steel

scholarly journals The Impact of the Lubricant Dose on the Reduction of Wear of QRO90 Steel Dies Used in the Forging Process of the Valve Forging Made of High-Nickel Steel

2020 ◽  
Author(s):  
Łukasz Dworzak ◽  
Marek Hawryluk ◽  
Marta Janik
Keyword(s):  
Cooling System ◽  
Industrial Process ◽  
Nickel Steel ◽  
Lubrication System ◽  
Forging Process ◽  
Feed Pressure ◽  
Wide Range ◽  
High Nickel ◽  
The Impact ◽  
High Nickel Steel

TThe paper presents the results of research on the influence of the settings of lubrication and cooling system parameters (solenoid valve opening time and lubricant feed pressure in terms of its quantity) in order to select the optimal lubricating conditions and thus reduce the wear of the dies used in the first forging operation of the valve forging made of high-nickel steel. Based on the observation of lubrication in the industrial process, it was found that a significant part of the lubricant fails to reach the die cavity, reaching the outside of it, which causes die wear due to seizure resulting from adhesion of the forging material to the tool surface, as well as high lubricant consumption and dirt in the press chamber. The authors proposed their own mobile lubricating and cooling system, which allows for a wide range of adjustments and provided with automatic cleaning procedures of the entire system, unlike the fixed lubrication system used so far in the industrial process. First, tests were carried out in laboratory conditions to determine the highest wettability and the lubricant remaining inside the tool cavity. These tests determined the lubrication system parameter settings which ensured that the greatest amount of lubricant remains in the cold die cavity without the forging process. Then, to verify the obtained results, tests were carried out in the industrial process of hot die forging of valve forgings, for short production runs of up to 500 forgings. The results were compared with the measurement of changes in the geometry of tools and forgings based on 3D scanning and surface topography analysis with the use of SEM. For best results (the variant of the setting of the dose and the time of exposure to lubricant), the forging process was carried out with the use of a new tool, up to the maximum service life.

scholarly journals Effect of Solute Elements on Dislocation Substructures Developed during High Temperature Creep in High Chromium High Nickel Steel

1990 ◽  
Vol 76 (2) ◽  
pp. 246-253 ◽  
Author(s):  
Yoshihiro KONDO ◽  
Tohru INAZUMI ◽  
Masao TAKEYAMA ◽  
Takashi MATSUO ◽  
Ryohei TANAKA
Keyword(s):  
High Temperature ◽  
Nickel Steel ◽  
High Temperature Creep ◽  
High Chromium ◽  
Temperature Creep ◽  
High Nickel ◽  
High Nickel Steel

scholarly journals An Experimental and Simulation Studies of a High Strain-Rate Deformation Shear Band in a High-Nickel Steel

2015 ◽  
Vol 21 (S3) ◽  
pp. 363-364
Author(s):  
Sung-Il Baik ◽  
Dieter Isheim ◽  
Divya Jain ◽  
R. K. Gupta ◽  
K.S. Kumar ◽  
...  
Keyword(s):  
Shear Band ◽  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Nickel Steel ◽  
Simulation Studies ◽  
High Nickel ◽  
High Strain Rate Deformation ◽  
High Nickel Steel

Microstructure and mechanical properties of 9% nickel steel welded by FSW

2020 ◽  
Vol 111 (11-12) ◽  
pp. 3225-3240
Author(s):  
Jaime Casanova ◽  
Gonçalo Sorger ◽  
Pedro Vilaça ◽  
Sérgio Duarte Brandi
Keyword(s):  
Mechanical Properties ◽  
Nickel Steel ◽  
Microstructure And Mechanical Properties
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