Patent ID: 11878377
Assignee: AT&M ENVIRONMENTAL ENGINEERING TECHNOLOGY CO., LTD.
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A method for welding Fe—Al intermetallic compound microporous material to dense stainless steel, wherein, the welding method comprises the steps of:
turning on “welding torch fuel-gas” of a fusion-welding machine, and turning on welding shielding gas in a shield, wherein the shield gas is used to protect the Fe—Al intermetallic compound microporous material, and in-shield argon gas (shielding gas) flow rate is 20-25 L/min;
adjusting welding parameters of the welding machine and parameter of the welding shielding gas in the shield for a fusion welding process;
switching on a rotating mechanism of a plasma girth the welding machine, adjusting welding torch position, pressing an arc start switch; using welding wire as welding filler to perform welding of the Fe—Al intermetallic compound microporous material to dense stainless steel and accomplishing the welding by manual filler-wire filling and full welding around whole perimeter, wherein the welding wire adopts GCrMo91 welding wire, ER310S welding wire or ERNiCr-3 welding wire, where the composition in GCrMo91 are C<0.1% wt, Cr 8˜10% wt, Mo<1% wt; and
cooling in the shield after completion of the welding for at least 10 seconds and then taking out a welded part;
wherein the fusion welding adopts plasma welding, and the welding parameters of the welding machine are adjusted as follows: welding current 50-60 A, argon-gas flow rate 10-15 L/min, welding speed 150-180 mm/min, ionized gas flow rate 1±0.1 L/min, meanwhile, the parameter of the welding shielding gas in the shield is adjusted to: shielding-gas flow rate 20-25 L/min.