scholarly journals Granite Bainite Microstructure and Hardness of 30Cr3Ni2 Alloy Steel Prepared by Laser Direct Deposition

2017 ◽  
Keyword(s):  
Alloy Steel ◽  
Direct Deposition ◽  
Laser Direct Deposition ◽  
Bainite Microstructure

scholarly journals STUDY ON THE EFFECT OF COMPOSITION AND VARIATION OF Sn/Zn COOLING MEDIA ON NICKEL ALLOY STEEL THROUGH HOT FORGING AND AUSTEMPERING

2021 ◽  
Vol 23 (1) ◽  
pp. 37
Author(s):  
Satrio Herbirowo ◽  
Martin Harimurti ◽  
Septian Adi Chandra ◽  
Dedi Pria Utama ◽  
Faried Miftahur Ridlo ◽  
...  
Keyword(s):  
Nickel Alloy ◽  
Alloy Steel ◽  
Nickel Content ◽  
Hot Forging ◽  
Industrial Applications ◽  
Cooling Medium ◽  
Nickel Chromium ◽  
Cooling Media ◽  
The One ◽  
Bainite Microstructure

STUDY ON THE EFFECT OF COMPOSITION AND VARIATION OF Sn/Zn COOLING MEDIA ON NICKEL ALLOY STEEL THROUGH HOT FORGING AND AUSTEMPERING. Laterite steel with nickel content is expected to be a solution to overcome the lack of domestic steel availability and dependence on imports. This research was conducted to develop Nickel-Chromium-Molybdenum alloy steel used Grinding ball for cement industrial applications. Grinding ball is the one of imported steel products needed to be crushing and size reduction the ores or cement. In addition to import issues, grinding balls have a significant problem: their mechanical properties that do not meet SNI 1049 require the material to have a minimum hardness value of 45 HRC. In this study, the characteristics of Nickel alloy steel were investigated further through heat treatment of forgings heated at the austenitizing temperature of 950 °C and austempering with variations in the cooling medium of Sn/Zn solution. The cooling medium was chosen because it has a melting temperature in the phase diagram area to form the bainite microstructure with complex and challenging characteristics, both of which are required in material for grinding ball applications. In particular, the hardness value that passed the SNI 1069 standard was the use of samples with a Cr-Mo alloy of 1%-wt with a hardness value of 45.92 HRC for Sn Austemper and 48.07 HRC for Zn austemper.

Study of TI64 Vibration Laser Metal Deposition Process

2011 ◽  
Vol 189-193 ◽  
pp. 512-517 ◽  
Author(s):  
Xue Yong Chen ◽  
Todd Sparks ◽  
Jian Zhong Ruan ◽  
Frank Liou
Keyword(s):  
Design Of Experiments ◽  
Grain Refinement ◽  
Crystalline Structure ◽  
Vibration Frequency ◽  
Deposition Process ◽  
Metal Deposition ◽  
Laser Deposition ◽  
Laser Metal Deposition ◽  
Direct Deposition ◽  
Laser Direct Deposition

This paper presents the usage of vibration in laser direct deposition of Ti64. The vibration is used to refine the crystalline structure of the deposition. The vibration device vibrates in the laser deposition system along the Z axis. A design of experiments approach is applied in studying the effect of vibration on the deposited material. Vibration during deposition led to grain refinement and an increase in microhardness over that of samples from no-vibration. Also, vibration frequency is a significant factor. From the experiment results, it is found that a vibration frequency greater than 20Hz is desirable.

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