Patent ID: 9150949
Filing Date: 2015-10-06
Classification: B23K,C23C,H05H

Abstract:
1. A method for depositing a coating from a plasma torch comprising: supplying a plasma torch generating voltage (U) above 100 V and current (I) below 500 A comprising a cathode electrode, an anode module having an anode electrode having an anode axis, entrance zone and a cylindrical portion having diameter Da wherein said plasma torch generates a plasma arc having an anode arc root attachment inside said anode; a plasma jet forming module located downstream of said anode arc root attachment which forming module controls one or more parameters of the plasma jet in said module; an interelectrode module controlling said plasma arc passage between said cathode and said anode having one end adjacent said cathode module and a second end adjacent said anode module and having a pilot insert adjacent to said cathode; at least one neutral inter-electrode insert; said plasma torch further comprising two passageways to feed plasma gas in a total amount G; supplying a feedstock into said plasma jet and depositing a coating on a substrate; wherein said plasma gas comprises more than 50 vol. % of molecular gas; wherein (U)(I)/(G) is in the range of 43 kJ/g-140 kJ/g; wherein one of said passageways for feeding plasma gas comprises a first plasma gas passage located between said cathode and pilot insert for feeding plasma gas in amount G wherein one of said passageways for feeding plasma gas comprises a second plasma gas passage located between said interelectrode module and said cylindrical portion of said anode for feeding plasma gas in an amount G wherein said gas is directed through a plurality of orifices having a surface area S wherein G wherein said Vort