Abstract
Manufacturers of welding equipment strive to develop the most efficient, cost-effective and easy to process welding methods. This necessity is also related to welding of new, often hard-to-weld steel types. The article aims to present the possibility of welding a high-strength S700MC steel with an increased yield point using MAG (135) process and a blowtorch with an intelligent arc control. The blowtorch allows to reduce input energy and reduce splinters while maintaining the mechanical properties of the material. The S700MC steel has been selected for the tests purposefully, as it may create welding problems in order to maintain high strength and increased yield point. The applied technology provided lower power consumption compared to traditional welding machines and joints with very good mechanical properties were achieved.
Highlights
In civil engineering and in the construction of transport means, high-strength steels and steels with an increased yield point are increasingly being used [1]
Welding with a consumable electrode in the gas shield has been dominating among all types of arc welding for many years due to the wide range of applications and high efficiency [2]
The tests were performed on the example of S700MC steel
Summary
In civil engineering and in the construction of transport means, high-strength steels and steels with an increased yield point are increasingly being used [1]. By welding with MIG/MAG technology, almost all metals and alloys can be combined by appropriately selecting the electrode wires and shielding gases suitable for different materials. The demand for joints with high quality steel materials and heat-sensitive elements is constantly increasing, so there is a need to develop another, low-energy variants of arc welding in the gas shield [6÷8]. The article aims to check the possibility of welding a steel with an increased yield strength using the MIG/MAG process with understated arc energy. The tests were performed on the example of S700MC steel (steel increasingly used in civil engineering and in the construction of transport means due to its high yield strength at 700 MPa)
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