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Author: Ivan Perfilyev

Metallography and Heat Treatment of Metal

The crystalline structures.

Posted on November 8, 2017 by Ivan Perfilyev / 0 Comment

In the solid metal the atoms are aligned in even lines, rows and layers, forming three-dimensional crystalline structures. By definition, the metals have the cr...

To become an Inspection Engineer

The features of AC arc burning. The diagrams of currents and voltages for the AC arc.

Posted on October 16, 2017 by Ivan Perfilyev / 0 Comment

It should be noted that all the properties of the DC arc are inherent in the AC arc. When the arc burns at the alternating current of 50 Hz, there are condition...

Metallography and Heat Treatment of Metal

The surface work of the critical dimension nucleus formation.

Posted on October 9, 2017 by Ivan Perfilyev / 0 Comment

In the formation of the crystallization nucleus, the part of the energy is released when the bulk phase occurs, and part of the work is spent on creating the su...

Metallography and Heat Treatment of Metal

The isolation of the excess phase from the supersaturated solid solution (Part 2).

Posted on September 15, 2017 by Ivan Perfilyev / 0 Comment

With the appearance of β-phase crystals, the α-solution surrounding them is depleted by component B. Near the β phase, the solid α-solution has the Сг compositi...

To become an Inspection Engineer

The amount of metal evaporating from the cathode spot (Part 2).

Posted on September 4, 2017 by Ivan Perfilyev / 0 Comment

At present, it is considered that the value of the ion fraction of the current in the welding arcs is approximately β ≈ 0.5. Assuming that the value of β does n...

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