Air valve plate bottom of marine low-speed machine and welding process of air valve plate bottom

• Main Authors: TONG CHANGBING, BAO HAIBEI, JIA LIANJUN, CHEN WENBIN, HU QIXIANG, ZHONG AIDONG, ZHAO DAZHONG, LU HONG
• Format: Patent
• Language: Chinese; English
• Published: 09.11.2016
• Subjects: ALLOYS; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; FERROUS OR NON-FERROUS ALLOYS; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WELDING; WORKING BY LASER BEAM

The invention discloses an air valve plate bottom of a marine low-speed machine and a welding process of the air valve plate bottom. The air valve plate bottom is provided with a central hole; a base material of the central hole is a SNCrW material containing the following chemical components: C, Si, Mn, P, S, Ni, Cr, W, Nb, B, N and the balance of Fe. According to the shape of the central hole, the central hole of the air valve plate bottom is divided into two sections: a straight hole section and an inclined hole section; for different shapes of the central hole, a welding procedure is divided into a welding phase I and a welding phase II. According to the air valve plate bottom of the marine low-speed machine and the welding process of the air valve plate bottom, a welding gun is tilted to a certain angle, and then swung to make welding alloy well fused with the base material, to guarantee full welding of the central hole; furthermore, by the use of a six-axis industrial robot and an MIG welding machine, f