GH4738 high temperature alloy round bar GH4738 nickel chromium alloy steel plate seamless pipe

It is a precipitation hardening deformed high-temperature alloy with a service temperature below ℃. Cobalt, chromium and molybdenum elements are added to the alloy for solid solution strengthening, aluminum and titanium elements are added to form the R phase, and boron and zirconium elements are added to purify and strengthen the grain boundaries. The alloy has high yield strength and fatigue resistance at ℃ ~ ℃. It has high oxidation resistance and corrosion resistance in gas turbine atmosphere below ℃. It is suitable for making turbine disks, working blades, high-temperature fasteners, and flame tubes. , shafts and turbine casings and other parts. The main products include cold-rolled strips and hot-rolled plates, pipes, strips, wires, forgings and bolt fasteners.
3 High-temperature alloys are used to make turbine disks, blades and sealing rings of aeroengines, as well as flue gas turbine blades, turbine disks and large bolts. This alloy is widely used in aviation, aerospace, petroleum, chemical and power generation equipment fields abroad, such as air compressor blades, turbine discs, valve body annulus and shafts and other transmission parts.
3 High-temperature alloys have good anti-oxidation and corrosion resistance in various atmospheres encountered in jet engines or similar working conditions. The anti-oxidation temperature can reach ℃ in continuous operation, and can reach ℃ in intermittent operation. Reaching ℃, the alloy has relatively good resistance to salt spray corrosion, especially the solution treatment state is the best. After the bar has been treated with ℃/﹢stabilization﹢aging, the notch durability test at ℃, ℃ and ℃ shows that the alloy No notch sensitivity. After long-term aging of the alloy to 3°C and 3°C, no new phases precipitated and the structure was stable.
Excerpted from B/, impurity element analysis is different from /, Yehan-, Yehan-, /./.3, see table
Chemical composition of Yehan 3 high temperature alloy
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/B, Yehan-, The range of impurity elements required to be inspected by Yehan-, /./.3 and /.3, please see the original standard for specific elements and mass fraction indicators.

Heat treatment system
Excerpted from B/, /, Yehan-, Yehan-, /././.3 and literature, literature.
The complete heat treatment of each variety includes: solution treatment + stabilization treatment + aging treatment. Among them:
Solid solution treatment, each variety is:
Cold drawn bar, (~) ℃ ℃ (~)/or faster cooling
Hot rolled bar, ℃ ℃/or Faster cooling
Cold drawn wire materials, (~3) ℃℃/or air cooling
Cold rolled plates and strips, annealed (supply status): ℃/or faster cooling, insulation 3 strips Solution treatment is carried out in a protective atmosphere, ℃℃./or faster cooling
Forged bars, disc forgings, rings, (~) ℃℃/or faster cooling.
Stabilization treatment℃℃. /.
Aging treatment: ℃℃/.