True to their promise of excellent customer service and a secure supply of merchandise, Air Products has turn out to be a trusted associate to their prospects and performs an integral function in ensuring that their manufacturing processes are efficient, cost-effective and delivers a top quality finish product. These solid relationships have been fashioned as the results of a combination of unsurpassed expert and educated technical experience from the Air Products group. The team at all times strives to offer clients with sound advice on the most suitable merchandise from Air Products’ intensive vary, to maximize their output.
According to Air Products, they’ve managed to place themselves as a market leader as they place an emphasis on the customer’s wants. Firstly, they purpose to guarantee that they’ve the product and the capacity to supply product based on the customer’s wants and assist in preventing disruptions and unnecessary down time. Secondly, เกจวัดแรงดันลมคือ make positive that the customers use the proper fuel for their purposes as this reduces post-weld actions and cleansing up. Their guidance is crucial to prospects, as these adjustments eradicates amassed prices which may be usually not anticipated.
Sean Young, Air Products Welding Specialist
Back to the drafting board with Sean Young
Sean Young emphasizes the importance of protecting a molten weld pool from atmospheric contamination and oxidation, both by a flux or with a protect gas. A flux is used in shielded metal arc (SMA) electrodes or submerged arc processes. Shielding gases, then again, are used in gas metallic arc welding (GMAW), fuel tungsten arc welding (GTAW) and a lot of the flux-cored processes.
Reviewing the specific standards associated to a customer’s processes and offering guidance is crucial. An assessment of the process, material and its thickness, and the popular metal switch must be carried out. Furthermore, to optimize the selection and ultimate high quality of the weld, the porosity, spatter, penetration, bead profile and fusion should be thought-about.
The function and advantages of protecting gases
The most regularly used mixtures and shielding gases with respective purposes are:
Ar: used for many GTAW software and GMAW of non-ferrous supplies
CO₂: used largely for GMAW in dip switch mode of steels
Ar/CO₂, Ar/O₂ and Ar/CO₂/O₂ gas combination: used for GMAW of chrome steel and other steels
Ar/He and Ar/H₂ mixtures: used for superior GTAW applications
Ar/He/CO₂ and Ar/H₂/CO₂ mixtures: used for GMAW
Argon and carbon dioxide both play a core shielding function in GMAW functions as they protect the weld metal from atmospheric oxygen or different contamination.
Young explains the distinction between pure oxygen and argon within the welding course of. “Pure CO₂, which is the original shielding gas for GMAW, is extensively used for general purpose welding of steel and is an effective shielding gasoline that prevents porosity. Due to its inclination to trigger giant droplet formation, it’s restricted in its use within the dip-transfer mode. This shielding gas by itself causes giant volumes of spatter which reduces the effectivity and arc time of the welder and increases the welder’s publish weld activities”.
Young additional explains: “Argon, however, is usually the dominant gas in any shielding gas mixture cylinder. In its pure type, argon is an inert gas which is purely used to keep other gases out and has no chemical effect on the deposited weld steel. Argon is used in almost all GTA welding in addition to for GMAW of aluminium alloys copper, its alloys and different oxygen sensitive material”.
The worth of adding active gases
Adding small quantities of shielding gases could achieve improved welding results, which means that the steel transfer is steady, there might be lowered spatter and a delicate arc. According to Young, an improved switch stability makes the welding course of less delicate to welding parameters and extra tolerant to voltage and present variations. This in the end results in an unlimited reduction in machine set-up time and a noticeable enchancment within the total productiveness.
“It is necessary to note that when welding with cored wires, and the oxygen content is just too excessive, there might be an elevated risk for porosities as the extra oxygen the flux”, says Young. He explains that argon/oxygen mixtures with oxygen of as much as 2% are perfect for chrome steel purposes.
To enhance the penetration of carbon steel joints, CO₂ should be added to the argon in a two-part combine. Young comments that an increase in CO₂ increases the heat of the welding arc, increases penetration and increases the welding pace. He cautions that 20% CO₂ in argon shouldn’t be exceeded, as it causes spatter and instability. “It is necessary to notice that 15% is optimal, and in the case of thinner materials the place you don’t want penetration, 5% CO₂ is sufficient”.
Three-part mixtures– the proven advantages
It is essential to know that a combination of defending gases performs a role in offering the most effective weld properties for particular applications. Young explains that three-part mixtures encompass argon and CO₂ (maximum 15%) and O₂ (maximum 3%). In an instance the place all three of these gases are used, arc stability is improved, penetration and bead profiles are improved, minimal spatter is generated, and metal switch traits are optimised.
One thing that Young is confident about is that there are particular benefits to using three-part mixture, based on his experience with many customers within the industry through the years.
“The three-part mixtures are extremely easy to use, and the welding stability allows for more variations in setting parameters. We have seen how the use of these gases have elevated the standard, productivity and efficiency, and in the end, measurable will increase in profitability. Welding stability is extremely necessary as it has a direct impression on the whole welding prices – it’s fascinating to see how small improvements can make an enormous difference”.
Young concludes: “At Air Products, we strive to turn out to be and stay a trusted associate to every certainly one of our clients by providing them with the best solutions for his or her enterprise, based on our knowledge and technical experience. Our strategy is straightforward: We determine essentially the most appropriate gases for a customer’s processes –thereafter the client focuses on the effectivity of their processes whereas we give consideration to a secure product provide as per their particular requirements.

Scroll to Top