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

Claim 3:
4. 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 the welding machine, 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 welding wire material adopts GCrMo91 (C<0.1% wt, Cr<8-10% wt, Mo<1% wt) heat-resistant steel welding wire, ER310S welding wire or ERNiCr-3 alloy, as welding filler; and
cooling after completion of the welding;
wherein the fusion welding adopts laser welding, and the welding parameters of the welding machine are adjusted as follows: welding power 2-3 kw, welding speed 50-100 mm/min, wire feed speed 85-100 mm/s, and defocusing amount 6-10 mm, meanwhile, the parameter of the welding shielding gas in the shield is adjusted to: shielding gas flow rate 20-25 L/min.