7results about How to "Arc stabilization" patented technology

The invention discloses a CMT electric arc welding method for defect repair welding of a ZL114A aluminum alloy casting, and belongs to the technical field of defect repair of aluminum alloy castings. The method aims at solving the problems that an existing repair welding method for the ZL114A cast aluminum alloy is high in heat input, large in deformation and low in repair efficiency. The method comprises the following steps: firstly, aiming at defects of different sizes, machining the defects into regular spherical-crown-shaped grooves of different sizes by utilizing a cold machining method; an electric steel wire brush is used for polishing the inner wall of the groove and base metal around the groove, and surface stains and oxide skin are removed; the casting is placed on a welding workbench; robot CMT welding equipment is adopted for repair welding; and writing a welding gun repairing path on the robot demonstrator. And repair welding is carried out according to the following principles: repair welding is carried out by utilizing an Al-Si welding characteristic curve, a repair welding piece is preheated to 250-350 DEG C, shielding gas is started, and automatic repair is started according to the planned path, the wire feeding speed and the welding speed. By means of the method, high-quality repair welding seams without pores and cracks can be obtained.

This invention provides a submerged arc welding wire for coal mine hydraulic supports that combines high strength and toughness in welds, and a method for its preparation. The chemical composition of the submerged arc welding wire, by mass percentage, includes: C: 0.09~0.15, Si: 0.05~0.10, Mn: 1.81~2.30, P≤0.010, S≤0.005, Cr: 0.20~0.45, Ni: 2.30~2.49, Cu: 0~0.09, Mo: 0.51~0.90, Ti≤0.020, Ca≤0.015, V≤0.025, Zr≤0.015, O≤0.004, N≤0.006, with the balance being Fe and other unavoidable impurities. The beneficial effects of the present invention are: (1) By rationally designing the chemical composition, under the process conditions of 20~40 kJ / cm heat input, the yield strength of the weld metal is ≥700 MPa, the tensile strength is between 810~910 MPa, the elongation is ≥22%, and the low-temperature impact toughness at -40℃ is ≥100J; (2) The welding wire preparation process is simple and does not require annealing treatment. When combined with the sintering flux commonly used in engineering, the arc is stable during the welding process, and the weld metal after welding has excellent strength and toughness, which meets the welding requirements of Q690M hydraulic support steel and can promote the large-scale development and application of high-strength hydraulic support steel.

This invention discloses a high-temperature resistant aluminum alloy wire suitable for arc-fused-wire additive manufacturing and its preparation method. The alloy wire comprises: manganese (Mn): 0.3-0.5%, copper (Cu): 5.3-5.8%, titanium (Ti): 0.15-0.35%, boron (B): 0.0005-0.006%, vanadium (V): 0.05-0.3%, zirconium (Zr): 0.05-0.2%, cadmium (Cd): 0-0.4%, silicon carbide (SiC): 0.1-0.4%, iron (Fe): ≤0.15%, silicon (Si): ≤0.06%, magnesium (Mg): ≤0.05%, zinc (Zn): ≤0.1%, other individual impurity elements: ≤0.05%, total other impurity elements: ≤0.15%, and the balance being aluminum (Al). The wire of this invention exhibits a uniform microstructure and moderate strength. The deposit formed by the arc-fused-wire additive manufacturing process possesses excellent strength, toughness, and other mechanical properties, with significantly improved heat resistance.

This application provides a welding control method, apparatus, equipment, and storage medium. In the embodiments of this application, a welding control mode alternating between pulse welding and DC welding is adopted. During the pulse welding cycle, normal welding is performed on the base material, while during the DC welding cycle, the minimum welding voltage and current are used to maintain the arc from extinguishing, preventing arc interruption and avoiding molten droplet spatter or arc ignition failure each time the arc is started. The minimum wire feed speed is used to control wire feeding, ensuring that the welding wire melts but does not transition into the molten pool, preventing short-circuit transition. Furthermore, at the end of both the pulse welding cycle and the DC welding cycle, the wire feed speed continues for a preset time before being changed, giving the wire feed motor appropriate reaction time. This ensures that the wire feed motor does not overshoot during speed changes, resulting in a more stable arc and a more aesthetically pleasing weld, especially for fish-scale welds, where the scales are clearer.

The invention discloses a high fracture toughness flux-cored wire for ocean engineering, which comprises a carbon steel sheath and powder filled in the sheath, and is characterized in that the powder comprises non-metal powder and metal powder; the non-metal powder comprises the following components in parts by weight: 360-380 parts of titanium dioxide; 13 to 25 parts of quartz; 40 to 50 parts of potassium silicotitanate; 35 to 55 parts of sodium silicotitanate; and 13-18 parts of cryolite. The welding wire is suitable for multi-layer and multi-pass welding of an EH36 steel plate with the thickness of 80 mm; and the welding heat input is controlled to be 12-25 kJ / cm, and good process adaptability is achieved.

The application provides a welding wire, a flux core and a cladding metal suitable for welding of 09CrCuSb steel, and belongs to the field of welding materials.The raw material of the flux core comprises, in weight parts, 3.0-6.0 parts of natural rutile, 1-3 parts of 75# ferrosilicon powder, 0.2-0.5 parts of sodium titanate, 0.1-0.3 parts of aluminum powder, 0.2-0.3 parts of fluoride, 1-3 parts of manganese iron powder, 0.6-1.2 parts of metallic chromium, 0.20-0.80 parts of copper powder, 0.2-0.4 parts of ferrochrome, 0.2-0.5 parts of quartz sand, 0.1-0.3 parts of antimony powder, 0.8-1.8 parts of iron powder and 0.4-1.0 parts of electrolytic manganese, so as to solve the problem of poor sulfuric acid dew point corrosion resistance of the cladding metal formed by welding of 09CrCuSb steel in the prior art.

The application aims to provide a hot plasma torch capable of freely adjusting power while providing more stable arc. The hot plasma torch has a first anode assembly and a second anode assembly, and the two anode assemblies are respectively configured with independent first power supply and second power supply, so that when the hot plasma torch is used, the high-temperature arc generated can be inside the first anode assembly or inside the second anode assembly, avoiding local high-temperature electrode ablation caused by a single anode, and providing the service life of the hot plasma torch. Specifically, the hot plasma torch provided by the application comprises a cathode assembly, a first anode assembly and a second anode assembly, a first power supply is arranged between the cathode assembly and the first anode assembly, a second power supply is arranged between the cathode assembly and the second anode assembly, and the first power supply and the second power supply are independent of each other.