Effects of ultrasonic vibrations on the porosity and hardness of compacts in the pressing of hard-alloy powder mixtures

1975 ◽  
Vol 14 (9) ◽  
pp. 717-720
Author(s):  
L. G. Kostin ◽  
L. T. Buchek ◽  
V. M. Shkil' ◽  
N. N. Sumaneev ◽  
M. E. Grenader ◽  
...  
Keyword(s):  
Hard Alloy ◽  
Alloy Powder ◽  
Ultrasonic Vibrations ◽  
Powder Mixtures

Effect of Nitridation Magnetic Properties of Nanocrystalline Fe-Co Alloy Powders

2010 ◽  
Vol 654-656 ◽  
pp. 1106-1109
Author(s):  
Ya Qiong He ◽  
Chang Hui Mao ◽  
Jian Yang
Keyword(s):  
Grain Size ◽  
Magnetic Properties ◽  
Alloy Powder ◽  
High Energy ◽  
X Ray Diffraction ◽  
Powder Mixtures ◽  
X Ray ◽  
Transmission Electron ◽  
Nitridation Temperature ◽  
Microstructure And Magnetic Properties

Nanocrystalline Fe-Co alloy powders, which were prepared by high-energy mechanical milling, were nitrided under the mixing gas of NH3/H2 in the temperature range from 380°C to 510°C. X-ray diffraction (XRD) was used to analyze the grain size and reaction during the processing. The magnetic properties of the nitrided powders were measured by Vibrating Sample Magnetometer (VSM). The results show that with the appearance of Fe4N phase after nitride treatment, and the grain-size of FeCo phase decreases with the increase of nitridation temperature between 380°C to 450°C.The saturation magnetization of nitrided alloy powder treated at 480°C is about 18% higher than that of the initial Fe-Co alloy powder, accompanied by the reduction of the coercivity. Transmission electron microscope (TEM) was used, attempting to further analyze the effect of Fe4N phase on microstructure and magnetic properties of the powder mixtures.

scholarly journals Study on Microstructure and Hardness of Hard Alloy Powder Layer Inserted by Molten Cast Steel.

2002 ◽  
Vol 15 (1) ◽  
pp. 1-7
Author(s):  
Kazuhiko OKADA ◽  
Hiroyuki IKE ◽  
Shoji GOTO ◽  
Setsuo ASO ◽  
Yoshinari KOMATSU
Keyword(s):  
Hard Alloy ◽  
Alloy Powder ◽  
Cast Steel ◽  
Powder Layer

Phase transformations in Si-based alloy powder mixtures induced by microwave heating in a 2.45 GHz single-mode applicator

2010 ◽  
Vol 18 (11) ◽  
pp. 2030-2033 ◽  
Author(s):  
Song Li ◽  
Guoqiang Xie ◽  
Dmitri V. Louzguine-Luzgin ◽  
Ziping Cao ◽  
Noboru Yoshikawa ◽  
...  
Keyword(s):  
Phase Transformations ◽  
Microwave Heating ◽  
Alloy Powder ◽  
Single Mode ◽  
Powder Mixtures

Inheritance of carbide-particle dimensions in explosive surfacing with hard-alloy powder

2015 ◽  
Vol 35 (4) ◽  
pp. 267-269
Author(s):  
A. V. Krokhalev ◽  
V. O. Kharlamov ◽  
O. A. Avdeyuk ◽  
K. V. Prikhod’kov ◽  
A. N. Savkin ◽  
...  
Keyword(s):  
Hard Alloy ◽  
Alloy Powder ◽  
Carbide Particle

Investigation of Thermal Fields at Phase Boundaries in Powder Mixtures that are Subject to Melting and Chemical Transformation

2020 ◽  
Vol 992 ◽  
pp. 1011-1015
Author(s):  
S.F. Dmitriev ◽  
Vladimir Malikov ◽  
Alexey V. Ishkov
Keyword(s):  
Hard Alloy ◽  
Melting Temperature ◽  
Phase Boundaries ◽  
Powder Mixtures ◽  
Thermal Fields ◽  
Temperature Recording ◽  
Alloy Particles ◽  
Charge Mixture ◽  
Thermocouple Method ◽  
Complex Temperature

An important part of the process of parts hardening by the induction surfacing method is the heating of hard alloy particles and flux in charge mixture. The article describes comprehensive studies on measurement and simulation of temperatures at phase boundaries in complex melting and heat-sensitive powder mixtures. To record the temperature in the induction surfacing process, it is proposed to apply CA micro-thermocouple method and the thermal indication method using SHS compositions. The developed methods for complex temperature recording in the process of induction surfacing allow to determine the melting temperature of the charge mixture and its single components.

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