Coal mining machinery

Coal mining machinery

Steel: high-strength steel plate
Board thickness: 12-30mm
Welding wire: solid welding wire 1.2mm
Preheating temperature: 100-150℃
Welding current: 220-290A
Arc voltage: 27-31V
Welding speed: 30-45CM/Min
Shielding gas: 80%Ar+20%CO2
Inspection requirements: ultrasonic inspection and magnetic particle inspection

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