scholarly journals Electrochemical processing of heavy tungsten alloy wastes for obtaining a microdispersed iron-nickel base powder by using alternating current

2021 ◽  
Vol 1942 (1) ◽  
pp. 012056
Author(s):  
O G Kuznetsova ◽  
A M Levin ◽  
M A Sevostyanov ◽  
O I Tsybin ◽  
A O Bolshikh
Keyword(s):  
Alternating Current ◽  
Tungsten Alloy ◽  
Electrochemical Processing ◽  
Base Powder ◽  
Iron Nickel ◽  
Nickel Base ◽  
Heavy Tungsten Alloy

scholarly journals Obtaining microdispersed iron-nickel powder in the process of electrochemical processing of VNZh type heavy tungsten alloys

2021 ◽  
Vol 12 (2-2021) ◽  
pp. 148-153
Author(s):  
O. G. Kuznetsova ◽  
◽  
A. M. Levin ◽  
M. A. Sevostyanov ◽  
◽  
...  
Keyword(s):  
Alkaline Solution ◽  
Nickel Powder ◽  
Alternating Current ◽  
Tungsten Alloy ◽  
Tungsten Alloys ◽  
Electrochemical Processing ◽  
Iron Nickel ◽  
Heavy Tungsten Alloy ◽  
Industrial Frequency

The process of electrochemical processing of the VNZh type heavy tungsten alloy (wt. %: 80 W, 16 Ni, 4 Fe) under the action of direct and alternating current of industrial frequency in an ammonia-alkaline solution has been investigated. It was found, that the process is accompanied by the transition of tungsten from the alloy to the solution and the formation of a microdispersed powder, based on iron and nickel.

scholarly journals Powder Metallurgical Processing and Characterization of Molybdenum Addition to Tungsten Heavy Alloys by Spark Plasma Sintering

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5756
Author(s):  
A. Raja Annamalai ◽  
A. Muthuchamy ◽  
Muthe Srikanth ◽  
Senthilnathan Natarajan ◽  
Shashank Acharya ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Microstructural Characterization ◽  
Tungsten Alloy ◽  
Plasma Sintering ◽  
Heavy Alloys ◽  
Molybdenum Addition ◽  
Spark Plasma ◽  
Iron Nickel ◽  
Heavy Tungsten Alloy ◽  
High Level

The effect of adding molybdenum to the heavy tungsten alloy of W-Ni-Fe on its material characteristics was examined in the current study. The elemental powders of tungsten, iron, nickel, and molybdenum, with a composition analogous to W-3Fe-7Ni-xMo (x = 0, 22.5, 45, 67.5 wt.%), were fabricated using the spark plasma sintering (SPS) technique at a sintering temperature of 1400 °C and under pressure of 50 MPa. The sintered samples were subjected to microstructural characterization and tested for mechanical strength. The smallest grain size of 9.99 microns was observed for the 45W-45Mo alloy. This alloy also gave the highest tensile and yield strengths of 1140 MPa and 763 MPa, respectively. The hardness increased with the increased addition of molybdenum. The high level of hardness was observed for 67.5Mo with a 10.8% increase in the base alloy’s hardness. The investigation resulted in the alloy of 45W-7Ni-3Fe-45Mo, observed to provide optimum mechanical properties among all the analyzed samples.

INCO-WELD B ELECTRODE

Alloy Digest ◽  
1984 ◽  
Vol 33 (12) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Tensile Properties ◽  
Arc Welding ◽  
Base Alloy ◽  
Heat Treating ◽  
Alternating Current ◽  
Nickel Base Alloy ◽  
Shielded Metal Arc Welding ◽  
Metal Arc Welding ◽  
Nickel Base

Abstract INCO-WELD B is a nickel-base alloy developed for shielded metal-arc welding of nickel steels for cryogenic applications. It is similar to INCO-WELD A Electrode (Alloy Digest Ni-305, November 1984) except that it is designed for use with alternating current to minimize magnetic arc blow. It can be operated in all welding positions. This datasheet provides information on composition and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-307. Producer or source: Huntington Alloys.

Study on the solid-phase sintering of the nano-structured heavy tungsten alloy powder

2007 ◽  
Vol 434-435 ◽  
pp. 367-370 ◽  
Author(s):  
J.S.C. Jang ◽  
J.C. Fwu ◽  
L.J. Chang ◽  
G.J. Chen ◽  
C.T. Hsu
Keyword(s):  
Alloy Powder ◽  
Solid Phase ◽  
Tungsten Alloy ◽  
Heavy Tungsten Alloy

Study of selected properties of the 98W-1.4Ni-0.6Fe heavy tungsten alloy

2021 ◽  
Vol 25 (3-4) ◽  
pp. 22-30
Author(s):  
Paweł Skoczylas
Keyword(s):  
Tensile Strength ◽  
Powder Metallurgy ◽  
Temperature Distribution ◽  
Liquid Phase ◽  
Outer Layer ◽  
Linear Shrinkage ◽  
Tungsten Alloy ◽  
Uniform Temperature ◽  
Sample Density ◽  
Heavy Tungsten Alloy

The aim of the work was to determine the density and tensile strength Rm of the sintered rod measured in selected places along its axis. The test rod with the composition of 98W-1.4Ni-0.6Fe was produced by powder metallurgy and sintering with the participation of the liquid phase. The performed measurements showed that the density of the samples depends on the place where the sample was taken from the bar and the amount of the outer layer removed by rolling. The densities of samples taken from the ends of the bar are higher than those taken from the center of the bar. The lowest density was obtained for ready-made strength samples. The performed measurements showed that for several samples the results of density and strength Rm are correlated. Gradually decreasing sample density translates into a decrease in their tensile strength. The lower density of samples from the central part of the bar can be related both to the linear shrinkage occurring during the process, as well as to the non-uniform temperature distribution in the sintering furnace space.

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