Recently, covid 19 outbreak spreads in Shanghai, China. There are more than 25,000 new asymptomatic domestic infections every day. China is implementing a dynamic zero-out policy. A leading respiratory expert said the key to COVID-19 prevention and control is to minimize transmission and fatality rate. Omicron has a low case fatality rate but is highly transmissible and can still claim many lives in large outbreaks. "Total openness is not applicable in China. For China, we should keep to the dynamic zero-out and gradually open up."
However, "dynamic zero clearance" is not the pursuit of complete "zero infection". As the Novel Coronavirus has its own uniqueness and strong concealment, there may be no way to prevent the detection of cases at present, but rapid detection and prompt treatment must be carried out, as soon as one case is found, one case will be dealt with.
The situation in Shanghai is serious. As the financial center of China, Shanghai is a very important city, and the outbreak of the epidemic in Shanghai will put a great impact on China's economy. The current task is to contain the spread of the epidemic as soon as possible, to achieve social zero so that Shanghai's life and economy quickly return to normal.
As China plays an important role in the global supply chain, the outbreak will have a significant impact on the supply and prices of many Hastelloy X alloy.
What is GH3536 superalloy (Hastelloy X alloy)
GH3536 (Hastelloy X alloy) is a nickel-based superalloy with high iron content mainly solid solution strengthened by chromium and molybdenum. It has good oxidation resistance and corrosion resistance, and has moderate durability and creep below 900 ℃. Strength, cold and hot workability and good weldability. Used in the manufacture of combustion chamber parts and other high-temperature parts of aero-engines, long-term use below 900 °C, and short-term operating temperature can reach 1080 °C. The main varieties supplied are plates, strips, pipes, bars, forgings, rings and precision castings.
GH3536 (Hastelloy X alloy) process performance and requirements
GH3536 (Hastelloy X alloy) formability alloy has good cold and hot forming
properties. Forging heating temperature 1170℃±10℃, final forging temperature not
lower than 950℃; slab hot rolling heating temperature 1150℃±10℃, final rolling
temperature not lower than 850℃; ring hot rolling heating temperature 1170℃±10℃
GH3536 (Hastelloy X alloy) welding performance This alloy has good welding process performance, and can be welded by argon arc welding, seam welding and spot welding. HGH3536 or HGH3113 wire is recommended for argon arc welding.
The microstructure of the alloy in the solid solution state is an austenite matrix with a small amount of TiN and M6C carbides. After long-term aging at 700～900℃, the main precipitation phases are M12C and M3B2, accompanied by trace μ phase and L phase. After aging at 700℃ for 200h, a small amount of σ phase appeared, but after aging at 800℃, the σ phase did not exist, and a small amount of M23C6 was precipitated, and sometimes a small amount of L phase appeared. Therefore, the alloy exhibits a certain degree of age hardening after long-term aging, which reduces the plasticity and the high temperature strength.
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Researchers at the Centre for Translational Atomic Materials at Swinburne University of Technology, Melbourne, Australia have developed a new graphene film that absorbs more than 90% of sunlight while eliminating most of the infrared thermal emission losses, a highly efficient A solar-heated metamaterial capable of rapidly heating to 83 degrees Celsius (181 degrees Fahrenheit) in an open environment with minimal heat loss. Proposed applications for the film include thermal energy harvesting and storage, solar thermal power generation, and seawater desalination.
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