Welding & Cutting News
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Hydrogen, the culprit causing porosity in aluminum welding
During aluminum welding, the weld metal solidifies and traps hydrogen, creating porosity. Hydrogen is the primary cause of porosity. Hydrogen can be generated from a variety of sources during aluminum welding, including moisture in the ambient air, moisture trapped in or on the weld metal oxide l...Read more -
Detailed introduction to gas welding and oxygen welding
The basic operation of gas welding includes the ignition, regulation, and extinguishing of the oxy-acetylene flame, starting welding, the movement of the welding torch and welding wire during welding, and the key techniques for jointing and finishing. Gas welding can be divided into left-hand we...Read more -
What factors affect welding quality and how to perform heat treatment before and after welding?
Welding quality depends primarily on the welding material, groove shape, welding method, heat treatment, and welder skill. Factors Affecting Welding 1) Among welding methods, flat welding is relatively easy, followed by vertical and horizontal welding, and overhead welding is relatively difficul...Read more -
13 key points to prevent welding deformation, simple and practical
Since welding deformation is mostly caused by the asymmetric heat generated by welding, resulting in different expansions, several methods to prevent welding deformation are summarized as follows for reference: 1. Reduce the cross-sectional area of the weld. On the premise of obtaining a compl...Read more -
What is the strip defect? Why can’t it be polished away and why can’t it be seen?
We often see strip defects in rework orders. Many welders say, “I know about pores, slag inclusions, and incomplete penetration. What is this strip defect? I can’t see it during grinding. What is this defect?” Today, let’s explain the definition of strip defects. The def...Read more -
Measures to improve fatigue strength of welded structures
Measures to improve fatigue strength of welded structures 1) Reduce stress concentration fatigue crack sources in welded joints and stress concentration points on structures. All means to eliminate or reduce stress concentration can improve the fatigue strength of structures. (1) Adopt reasonable...Read more -
Aluminum alloy laser welding technology
With the development of laser technology and aluminum alloy research and development technology, it is particularly important to further carry out basic research on aluminum alloy laser welding application technology, develop new aluminum alloy laser welding processes, and more effectively expand...Read more -
How to effectively prevent porosity in argon arc welding?
Causes of pores (1) The base material is unclean; the groove edge is not cleaned properly; (2) There are large differences in the composition and properties of the welding material and the base material; (3) Problems with welding shielding gas; a) The argon pressure in the gas cylinder is insuffi...Read more -
Tube-to-tube GTAW welding parameters
Tungsten Inert Gas Welding, abbreviated as TIG. Later, the American Welding Society officially named it Gas Tungsten Arc Welding, and the abbreviation was changed to GTAW. Here we talk about the welding parameters of GTAW for pipe-to-pipe butt welding. When the pipe-to-pipe butt fittings are hor...Read more -
If you want to do argon arc welding well, you must remember these process taboos!
Taboos of Tungsten Inert Gas Arc Welding Process 1 Avoid using DC reverse welding in general welding During DC tungsten inert gas arc welding, the heat generated by the anode is much greater than that of the cathode. Therefore, when using DC positive connection (workpiece positive connection) we...Read more -
Analysis of the causes of incomplete welding of branch pipe platform and its countermeasures
1 Introduction With the development of the oil and gas industry, the market has placed higher and higher demands on the exhaust pressure of natural gas compressors. In addition to high quality requirements for the main components of the compressor, higher and higher requirements are placed on th...Read more -
How many people can master the performance of welding heat affected zone?
The welding heat affected zone (HAZ) is different from the weld. The weld can be adjusted by chemical composition, redistribution and appropriate welding process to ensure the performance requirements, while the performance of the heat affected zone cannot be adjusted by chemical composition. It ...Read more
