Design strength of powder metallurgy steels produced by dynamic hot pressing

1983 ◽  
Vol 22 (11) ◽  
pp. 949-952
Author(s):  
Yu. G. Dorofeev ◽  
N. A. Shtepin ◽  
K. K. Lamkov
Keyword(s):  
Powder Metallurgy ◽  
Hot Pressing ◽  
Design Strength ◽  
Dynamic Hot Pressing

Effect of dynamic hot pressing on carbon diffusion in powder metallurgy permanent magnets

1974 ◽  
Vol 13 (1) ◽  
pp. 24-25
Author(s):  
Yu. G. Dorofeev ◽  
Yu. S. Shatov ◽  
K. K. Lamkov ◽  
E. A. Skorikov ◽  
B. G. Gasanov
Keyword(s):  
Powder Metallurgy ◽  
Hot Pressing ◽  
Permanent Magnets ◽  
Carbon Diffusion ◽  
Dynamic Hot Pressing

Application of dynamic hot pressing in powder metallurgy

1966 ◽  
Vol 5 (7) ◽  
pp. 534-540 ◽  
Author(s):  
Yu. G. Dorofeev ◽  
N. T. Zherditskii
Keyword(s):  
Powder Metallurgy ◽  
Hot Pressing ◽  
Dynamic Hot Pressing

Properties of the Electro-Spark Deposited Coatings - Technology and Applications

2015 ◽  
Vol 818 ◽  
pp. 61-64 ◽  
Author(s):  
Norbert Radek ◽  
Jozef Bronček ◽  
Peter Fabian ◽  
Jacek Pietraszek ◽  
Krzysztof Antoszewski
Keyword(s):  
Wear Resistance ◽  
Powder Metallurgy ◽  
Carbon Steel ◽  
Abrasive Wear ◽  
Hot Pressing ◽  
Abrasive Wear Resistance ◽  
Roughness Analysis ◽  
Ceramic Electrodes ◽  
Machine Parts ◽  
Wear Coatings

The paper is concerned with the performance properties of electro-spark deposited coatings, which were determined basing on microstructural and roughness analysis and application tests. The studies were conducted using of the tungsten carbide-ceramic electrodes produced by the powder metallurgy hot pressing route. The anti-wear coatings were electro-spark deposited over C45 carbon steel by means of an EIL-8A. These coatings are likely to be applied to increase the abrasive wear resistance of tools and machine parts.

Diffusion of carbon in iron specimens produced by dynamic hot pressing

1972 ◽  
Vol 11 (10) ◽  
pp. 792-795
Author(s):  
Yu. G. Dorofeev ◽  
V. V. Mural' ◽  
V. T. Prutsakov ◽  
K. K. Lamkov
Keyword(s):  
Hot Pressing ◽  
Dynamic Hot Pressing

Evaluation of the Influence of Pre-Alloyed Powder Fe65Nb on the Production of Metal Matrices by Powder Metallurgy

2020 ◽  
Vol 1012 ◽  
pp. 3-8
Author(s):  
A.C.G. Silva ◽  
Hellen C.P. Oliveira ◽  
Thales Eduardo Leal ◽  
Paulo Santos Assis
Keyword(s):  
Mechanical Properties ◽  
Powder Metallurgy ◽  
Chemical Composition ◽  
Solid State ◽  
Hot Pressing ◽  
Physical And Mechanical Properties ◽  
Toxic Element ◽  
Alloyed Powder ◽  
Eds Analysis ◽  
Porosity Measurements

The objective of this paper is to study Fe65Nb-Cu metal matrices, thus varying the content of the pre-alloyed Fe65Nb powder from 10% to 100%. Therefore, powders of Fe65Nb and Cu were used, innovating in the chemical composition of the commonly used matrices. The objective is to evaluate the substitution of Co (toxic element, commonly used) by Nb (98.2% of reserves are Brazilian). For the sintering of the samples it was used hot pressing technique. The parameters were set at: 850°C / 35MPa / 3min. The sintered bodies underwent SEM/EDS analysis and density and porosity measurements were performed. From the results it is possible to say that the compositions of (10% and 30% Fe65Nb) presented the best physical and mechanical properties. The relative density decreases for the compositions with 40%, 50% and 60% Fe65Nb is justified by the presence of fragile particles in metal matrices, since they require more energy in order to efficiently transport matter (diffusion) in a solid state.

A laboratory unit for the dynamic hot pressing of powder materials

1978 ◽  
Vol 17 (4) ◽  
pp. 310-312
Author(s):  
V. A. Martynov ◽  
V. P. Petrenko ◽  
N. V. Avdeev ◽  
R. G. Berezin
Keyword(s):  
Hot Pressing ◽  
Powder Materials ◽  
Laboratory Unit ◽  
Dynamic Hot Pressing

scholarly journals The effect of porosity and cu rate on microstructure and mechanical properties of co alternative powder metallurgy compound

2017 ◽  
Vol 49 (3) ◽  
pp. 225-234
Author(s):  
Ertuğrul Çelık ◽  
Alı Aslan
Keyword(s):  
Mechanical Properties ◽  
Powder Metallurgy ◽  
Hot Pressing ◽  
Theoretical Density ◽  
Microstructure And Mechanical Properties ◽  
Vacuum Atmosphere ◽  
Porosity Ratio ◽  
Cold Pressed ◽  
Measured Density

Cu-Ni-MX1480 powder compound were prepared at six different alloy ratios and cold pressed with a pressure of 300 MPa. Then 12 samples were obtained by hot pressing at 700 ?C with 20 MPa pressure and at 800?C with 30 MPa pressure for 4 minutes in a vacuum atmosphere hot pressing machine. Porosity ratios of samples were calculated by the different between theoretical density and measured density of samples. Effect of porosity on microstructure and mechanical properties were investigated by performing SEM, XRD, hardness measurements and TRS tests. It was observed that as a result of increased hot pressing parameters and increased Cu ratio, porosity ratio was decreased and better mechanical properties achieved.

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