Method for defect free keyhole plasma arc welding
DD Harwig, JF Hunt, PM Ryan, WJ Fisher - US Patent 5,225,654, 1993 - Google Patents
A plasma arc welding process for welding metal of increased thickness with one pass
includes operating the plasma arc welding apparatus at a selected plasma gas flow rate,
travel speed and arc current, to form a weld having a penetration ratio to weld height to weld
width, and maintaining the penetration ratio at less than 0.74. Parameters for the plasma gas
flow rate, travel speed and arc current are adjusted to a steady state condition during a start
up period and maintained during the steady state condition to complete a weld. During a …
includes operating the plasma arc welding apparatus at a selected plasma gas flow rate,
travel speed and arc current, to form a weld having a penetration ratio to weld height to weld
width, and maintaining the penetration ratio at less than 0.74. Parameters for the plasma gas
flow rate, travel speed and arc current are adjusted to a steady state condition during a start
up period and maintained during the steady state condition to complete a weld. During a …
Method for defect free keyhole plasma arc welding
DD Harwig, JF Hunt, PM Ryan, WJ Fisher - 1993 - ntrs.nasa.gov
A plasma arc welding process for welding metal of increased thickness with one pass
includes operating the plasma arc welding apparatus at a selected plasma gas flow rate,
travel speed and arc current, to form a weld having a penetration ratio to weld height to weld
width, and maintaining the penetration ratio at less than 0.74. Parameters for the plasma gas
flow rate, travel speed and arc current are adjusted to a steady state condition during a start
up period and maintained during the steady state condition to complete a weld. During a …
includes operating the plasma arc welding apparatus at a selected plasma gas flow rate,
travel speed and arc current, to form a weld having a penetration ratio to weld height to weld
width, and maintaining the penetration ratio at less than 0.74. Parameters for the plasma gas
flow rate, travel speed and arc current are adjusted to a steady state condition during a start
up period and maintained during the steady state condition to complete a weld. During a …
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