Contact Person : ZHANG
Phone Number : 86-18137338517
WhatsApp : +8618137338517
March 13, 2023
Welding Challenges and Solution for Pickled Polished Hastelloy C276 Nickel Based Alloys,Kovar Nickel Based Alloy Strip Coil Foil 4j29 4j36
Kovar Nickel Based Alloy Strip Coil Foil 4j29 4j36 refer to a class of alloys that have comprehensive properties such as high strength and certain oxidation and corrosion resistance at high temperatures of 650-1000 ° C, which makes them the standard choice for aerospace and power generation turbines. However, its weldability can be a serious problem, especially for precipitation-strengthened alloys.For example, alloying elements with low melting points, such as sulfur or lead, can cause metal embrittlement during welding. Carbide precipitation can also lead to crack formation. Stress in the heat-affected zone (HAZ) can cause liquefaction cracks. An incorrect pass temperature will prevent adequate fusion of the metals. The solution can use the following welding techniques:
On the one hand, tungsten inert gas welding (TIG) is the most suitable welding process for nickel-based superalloys. Excellent heat input control minimizes the heat-affected zone, reducing the risk of grain growth and also reducing the risk of cracking. Additionally, inert gas shielding prevents oxidation while forming pure welds. Compatible filler materials containing Ti, Al and Nb and TIG welding can further reduce the risk of cracking or porosity.
On the other hand, automated welding techniques, such as orbital welding, can ensure the correct implementation of welding procedures. The control, consistency and repeatability of the orbital welding process ensures high-quality welds in every process. Orbital welding heads enable correct weld penetration, while a remote monitoring system enables optimization of welding parameters for nickel-based superalloys. Orbital welding can improve overall productivity and economics for manufacturers while maintaining the corrosion resistance and strength of nickel-based superalloys.
Kovar Nickel Based Alloy Strip Coil Foil 4j29 4j36 Picture: