Under the spread of the new crown epidemic, after Americans experienced life and death, they set off the largest "resignation wave" in history, and the number of resignations broke the highest record since statistics began in 2000. Since April this year, more than 4 million people in the United States have voluntarily resigned each month. In August, the number of resignations exceeded 4.27 million, and in November, it rose to 4.4 million. The operation of society is linked. The large number of departures in the United States has led to a large shortage of labor; and the shortage of a large number of labor has directly led to the supply chain crisis in the United States; the supply chain crisis has directly affected prices and prices in the United States. The economy has a direct effect on people's lives.
The economic downturn will affect the market demand for Inconel718 powder.
Nickel-based superalloys are the most widely used. The main reason is that, one is that more alloying elements can be dissolved in the nickel-based alloy, and it can maintain good structural stability; the other is that it can form a coherent and ordered A3B-type intermetallic compound γ[Ni3(Al, Ti)] As a strengthening phase, the alloy can be effectively strengthened and obtain higher high temperature strength than iron-based superalloys and cobalt-based superalloys; thirdly, nickel-based alloys containing chromium have better oxidation and resistance than iron-based superalloys.
Nickel-based alloys contain more than ten elements, of which Cr mainly plays an anti-oxidation and anti-corrosion role, and other elements mainly play a strengthening role. According to their strengthening action mode, they can be divided into: solid solution strengthening elements such as tungsten, molybdenum, cobalt, chromium and vanadium; precipitation strengthening elements such as aluminum, titanium, niobium and tantalum; grain boundary strengthening elements such as boron, zirconium, Magnesium and rare earth elements, etc.
In terms of smelting: in order to obtain more pure molten steel, reduce gas content and harmful element content; at the same time, due to the presence of easily oxidizable elements such as Al and Ti in some alloys, it is difficult to control non-vacuum smelting; it is also to obtain better thermoplasticity , Nickel-based heat-resistant alloys are usually smelted in a vacuum induction furnace, and even produced by vacuum induction smelting plus vacuum consumable furnace or electroslag furnace remelting.
In terms of deformation: forging and rolling processes are used. For alloys with poor thermoplasticity, they are even rolled after extrusion and billeting or are directly extruded with mild steel (or stainless steel) sheathing. The purpose of deformation is to break the casting structure and optimize the microstructure.
Casting: usually use a vacuum induction furnace to smelt the master alloy to ensure the composition and control the gas and impurity content, and use the vacuum remelting-precision casting method to make parts.
Heat treatment: Wrought alloy and some cast alloys need to be heat treated, including solution treatment, intermediate treatment and aging treatment. Take Udmet 500 alloy as an example. Its heat treatment system is divided into four stages: solution treatment, 1175℃, 2 hours, Air cooling; intermediate treatment, 1080°C, 4 hours, air cooling; primary aging treatment, 843°C, 24 hours, air cooling; secondary aging treatment, 760°C, 16 hours, air cooling. In order to obtain the required organizational state and good overall performance.
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Due to the Russia-Ukraine conflict and the covid-19 pandemic, how will the international situation develop is highly uncertain. It is too difficult to assess its economic impact properly. However, we could see energy prices and commodity prices keep rising and supply chains are disrupted. Therefore, Inconel718 powder prices are expected to rise in the future.
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