จำหน่ายเกจวัดแรงดัน Pressure Gauge ทุกยี่ห้อ

ศูนย์รวมเครื่องมือวัดความดัน

AIR PRODUCTS – A TRUSTED SUPPLIER AND RELIABLE PARTNER IN WELDING PROCESSES

True to their promise of outstanding customer support and a secure supply of merchandise, Air Products has turn out to be a trusted associate to their customers and plays an integral function in making certain that their production processes are efficient, cost-effective and delivers a quality finish product. These stable relationships have been formed as the outcomes of a mix of unsurpassed skilled and educated technical expertise from the Air Products team. The staff at all times strives to supply prospects with sound advice on essentially the most appropriate merchandise from Air Products’ in depth range, to maximize their output.
According to Air Products, they have managed to position themselves as a market leader as they place an emphasis on the customer’s needs. Firstly, they purpose to guarantee that they’ve the product and the capability to supply product according to the customer’s wants and assist in preventing disruptions and unnecessary down time. Secondly, they ensure that the shoppers use the correct fuel for his or her applications as this reduces post-weld actions and cleaning up. Their steerage is crucial to clients, as these changes eradicates amassed prices that are typically not anticipated.
Sean Young, Air Products Welding Specialist
Back to the drafting board with Sean Young
Sean Young emphasizes the importance of defending a molten weld pool from atmospheric contamination and oxidation, both by a flux or with a shield gas. เกจแรงดัน is used in shielded metallic arc (SMA) electrodes or submerged arc processes. Shielding gases, on the opposite hand, are used in gasoline steel arc welding (GMAW), fuel tungsten arc welding (GTAW) and a lot of the flux-cored processes.
Reviewing the specific standards related to a customer’s processes and offering steerage is important. An assessment of the process, material and its thickness, and the popular metal transfer ought to be conducted. Furthermore, to optimize the choice and ultimate quality of the weld, the porosity, spatter, penetration, bead profile and fusion should be thought-about.
The function and benefits of defending gases
The most incessantly used mixtures and shielding gases with respective purposes are:
Ar: used for many GTAW application and GMAW of non-ferrous materials
CO₂: used largely for GMAW in dip transfer mode of steels
Ar/CO₂, Ar/O₂ and Ar/CO₂/O₂ gas mixture: used for GMAW of stainless steel and different steels
Ar/He and Ar/H₂ mixtures: used for advanced GTAW applications
Ar/He/CO₂ and Ar/H₂/CO₂ mixtures: used for GMAW
Argon and carbon dioxide both play a core shielding role in GMAW applications as they shield the weld metal from atmospheric oxygen or different contamination.
Young explains the distinction between pure oxygen and argon within the welding process. “Pure CO₂, which is the original shielding gasoline for GMAW, is broadly used for general function welding of steel and is an effective shielding fuel that forestalls porosity. Due to its inclination to cause giant droplet formation, it is restricted in its use in the dip-transfer mode. This shielding gasoline by itself causes large volumes of spatter which reduces the efficiency and arc time of the welder and increases the welder’s publish weld activities”.
Young additional explains: “Argon, on the other hand, is usually the dominant gasoline in any shielding gas mixture cylinder. In its pure type, argon is an inert fuel which is solely used to maintain different gases out and has no chemical impact on the deposited weld metallic. Argon is used in almost all GTA welding as properly as for GMAW of aluminium alloys copper, its alloys and different oxygen sensitive material”.
The value of adding lively gases
Adding small quantities of shielding gases could obtain improved welding results, which signifies that the steel transfer is steady, there’s lowered spatter and a soft arc. According to Young, an improved switch stability makes the welding process much less delicate to welding parameters and more tolerant to voltage and current variations. This ultimately leads to an enormous reduction in machine set-up time and a noticeable improvement within the total productivity.
“It is essential to notice that when welding with cored wires, and the oxygen content is too high, there may be an increased threat for porosities as the extra oxygen the flux”, says Young. He explains that argon/oxygen mixtures with oxygen of up to 2% are ideal for stainless steel applications.
To enhance the penetration of carbon metal joints, CO₂ should be added to the argon in a two-part combine. Young comments that a rise in CO₂ increases the heat of the welding arc, will increase penetration and will increase the welding speed. He cautions that 20% CO₂ in argon shouldn’t be exceeded, as it causes spatter and instability. “It is necessary to note that 15% is optimal, and within the case of thinner supplies where you don’t need penetration, 5% CO₂ is sufficient”.
Three-part mixtures– the proven advantages
It is essential to know that a combination of defending gases plays a task in providing one of the best weld properties for explicit 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, minimum spatter is generated, and metal switch traits are optimised.
One thing that Young is confident about is that there are definite advantages to using three-part mixture, based mostly on his expertise with many purchasers in the trade over the years.
“The three-part mixtures are extraordinarily easy to make use of, and the welding stability allows for extra variations in setting parameters. We have seen how the utilization of these gases have elevated the standard, productivity and efficiency, and finally, measurable will increase in profitability. Welding stability is extraordinarily necessary because it has a direct impression on the whole welding costs – it is attention-grabbing to see how small improvements could make a giant difference”.
Young concludes: “At Air Products, we try to become and remain a trusted companion to every one of our clients by offering them with the most effective solutions for his or her business, based mostly on our information and technical expertise. Our method is straightforward: We determine essentially the most appropriate gases for a customer’s processes –thereafter the client focuses on the effectivity of their processes while we give attention to a secure product provide as per their specific necessities.
Share