Method for manufacturing equal-strength steel thin-wall welding component with aluminum or aluminum alloy plating

A method for manufacturing an equal-strength steel thin-wall welded component with an aluminum or aluminum alloy clad layer, comprising the following steps:

• 1) Taking a straight steel plate to be used as a steel plate to be welded, wherein the steel plate to be welded comprises a substrate and at least one clad layer on a surface thereof, wherein the clad layer comprises an intermetallic compound alloy layer in contact with the substrate and a metal alloy layer thereon, wherein the clad layer in a to-be-welded zone of the steel plate to be welded is not removed or thinned;
• 2) Presetting a butt gap between two steel plates to be welded at 0.2-0.5 mm;
• and
• 3) Conducting welding by a laser filler wire welding process, a laser composite filler wire welding process or a gas metal arc welding process to obtain a final equal-strength steel thin-wall welded component with an aluminum or aluminum alloy clad layer, wherein the laser filler wire welding process uses a laser spot having a diameter of from 0.8 to 2.0 mm, a defocus distance of from −10 to 10 mm, a laser power controlled at from 4 to 6 kW, a welding speed controlled at from 40 to 140 mm/s, a welding wire having a diameter of from 0.8 to 1.4 mm, and a wire feeding speed of from 2 to 8 m/min;
• wherein the laser composite filler wire welding process uses a laser spot having a diameter of from 0.4 to 1.2 mm, a defocus distance of from −10 to 10 mm, a laser power controlled at from 1 to 5 kW, a welding speed controlled at from 40 to 140 mm/s, a welding wire having a diameter of from 0.8 to 1.4 mm, a wire feeding speed of from 2 to 8 m/min, a welding electric current of 80-100 A, and an electric voltage of 18-25 V;
• and the gas metal arc welding process uses a welding electric current of 110-130 A, and a welding electric voltage of 18-25 V, a welding speed of from 300 to 800 mm/min, and a welding wire having a diameter of from 0.8 to 1.4 mm.