scholarly journals Inert gas absorption and pore formation in nickel-based hot-melt alloys

2021 ◽  
Vol 97 (1) ◽  
pp. 20-27
Author(s):  
Yu. F. Ternovyi ◽  
◽  
S. A. Vodennikov ◽  
O. S. Vodennikova ◽  
◽  
...  

An integrated approach to the generalization and analysis of scientific and technical literature in the direction of improving the technological processes of spraying metal melts used a comprehensive approach The processing and analysis of experimental data for the determination of argon at different stages of heat-resistant alloy production were performed. Micro structural analysis of nickel-based heat-resistant alloys obtained by gas and centrifugal spraying was performed. A significant increase in the mass fraction of argon in the melt is shown when held in a furnace before gas or centrifugal spraying, the absence of capture of inert gas by sprayed liquid particles during centrifugal spraying is shown, unlike the process of gas spraying, it is shown. The results of the study indicate the absence of "dissolution" of Ar or a mixture of Ar-He in the liquid or solid state at argon levels up to 1 • 10-4% of the mass. It is established that centrifugal spraying of metal melts allows obtaining compact powders with small particle size distribution at relatively low energy consumption. It is also noted that argon is captured by the metal only in the process of moving on the disk, and not due to the weak dynamic gas interaction directly on the melt droplets. Hence, its amount in the metal increases after the argon’s injection into the furnace chamber and at the subsequent centrifugal spraying does not change, in comparison with gas spraying. A technological possibility has been found to significantly reduce the amount of gas pores and the mass fraction of inert gas in nickel-based heat-resistant alloys. Nickel-based heat-resistant alloys obtained by the method of gas and centrifugal spraying make it possible to improve the quality of products for the aviation industry, their reliability when operating in extreme conditions. Keywords: gas spraying, centrifugal spraying, heat-resistant alloy, argon, helium, pore formation.

Alloy Digest ◽  
1962 ◽  
Vol 11 (5) ◽  

Abstract Midohm is a copper-nickel, heat resistant alloy having a maximum operating temperature of 400 deg F. It is normally used for resistor and potentiometer applications where low specific resistance is required. This datasheet provides information on composition, physical properties, and tensile properties. Filing Code: Cu-117. Producer or source: Driver-Harris Company.


Alloy Digest ◽  
1998 ◽  
Vol 47 (12) ◽  

Abstract MO-RE 40MA is a fully austenitic heat-resistant alloy for elevated temperature applications. The alloy is microalloyed for creep strength and oxidation resistance. This datasheet provides information on composition, physical properties, and tensile properties as well as creep. It also includes information on high temperature performance. Filing Code: Ni-548. Producer or source: Duraloy Technologies Inc.


2011 ◽  
Vol 53 (11) ◽  
pp. 3588-3595 ◽  
Author(s):  
Jingbo Yan ◽  
Yimin Gao ◽  
Yudi Shen ◽  
Fang Yang ◽  
Dawei Yi ◽  
...  

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