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Welding quality is mainly determined by five core parameters. Welding current controls weld penetration, and arc voltage affects weld formation and width. Welding speed regulates thermal input to avoid common welding defects. Wire extension length stabilizes arc performance, while the welding torch angle ensures effective gas shielding. Scientific adjustment and reasonable matching of these parameters can effectively improve welding stability and achieve high-quality weld results.

Welding porosity is one of the most common welding defects in steel fabrication, shipbuilding, oil and gas projects, and heavy industry. Welding porosity forms when gas becomes trapped inside the weld pool during solidification. These small holes can reduce strength, cause leaks, increase corrosion risk, and affect overall weld quality. Understanding the causes of welding porosity is important for every welder and fabrication company. Proper surface cleaning, shielding gas control, welding parameter adjustment, and correct operating techniques can greatly reduce welding porosity. Morrow Welding provides advanced welding power sources for industries worldwide and helps customers improve welding quality, productivity, and reliability in demanding applications.

Learn practical skills for weld capping, including pre-weld cleaning, parameter setting, weaving methods and joint handling. It also shares tips to avoid typical defects in flat, horizontal, vertical, overhead and 6G pipe welding.

Steel structures are widely used in construction, shipbuilding, oil, energy, and heavy industry. The feature of steel structure includes high strength, light weight, good toughness, and fast installation. These advantages make steel structures important in many modern projects. Morrow Welding provides advanced welding power sources for steel structure production and fabrication. The company focuses on reliable welding equipment for industries such as steel manufacturing, shipbuilding, petroleum, and metallurgy. Morrow Welding has stable markets in Europe, America, Asia, and the Middle East. The company continues to support global customers with efficient welding solutions for different steel structure applications.

We list standard requirements for on-site welding construction. It includes rules for procedure documents, weld bead dimensions, fillet welds, multi-layer welding and special welding bans. All rules help avoid cracks and safety risks, and keep stable weld quality.

Sichuan Morrow Welding presents the NBC-1000, a custom 1000A gas shielded welding machine for precise copper welding. Designed for 4.0mm welding wire, the NBC-1000 ensures stable and strong performance. It features soft switch technology for high efficiency and low power use. Automatic protections prevent over-current, overheating, and voltage issues. Its closed-loop arc control and digital display improve welding quality and reduce spatter. Compact and lightweight, it is perfect for frequent industrial welding. Widely applied in steel, shipbuilding, oil, and construction, the NBC-1000 is trusted by customers across Europe, Asia, and the Middle East as a high-performance custom copper welding solution.

Quality builds trust! A long-time steel structure customer has placed a repeat order for 37 units of NBC Series of IGBT Inverter Carrier-wave MAG Welders with Sichuan Morrow Welding. Satisfied with our welders’ stable performance and reliable service since 2024, the customer will soon receive the new batch of tested machines to support their production.

Interpass temperature is a key process parameter in multi-pass welding. It directly affects the microstructure and mechanical properties of the weld. For low-alloy steels, you must keep a higher interpass temperature to improve toughness. For aluminum alloys, you need strict temperature control to prevent distortion. When you do welding work, you should take actual measurements with a temperature pen or an infrared thermometer. You must record and archive the data. Specific temperature values should be decided by the welding procedure specification (WPS) or welding procedure qualification (PQR).

Weld heat cracks are serious common welding flaws. They easily form in carbon steel and stainless steel due to material brittleness, welding tensile stress and sulfur-phosphorus impurity segregation. Narrower and deeper welds have higher cracking risk. Reasonable heat input, groove design and welding materials can prevent such cracks. Good control of heat cracks is key to welding quality and production safety in offshore engineering and pressure vessel industries.