GH2018 (GH18) superalloy is a Fe-Ni-Cr-based precipitation hardening deformed superalloy with a service temperature of less than 800 °C. Chromium, tungsten and molybdenum are added to the alloy for solution strengthening, and aluminum-titanium elements are added to form an age-strengthened phase. This alloy has a high level of high-temperature strength, good oxidation resistance, hot-working plasticity, welding and cold-forming process properties.
In the manufacturing process of GH2018 (GH18) superalloys, its heat treatment regime is a key link. Both hot-rolled and cold-rolled plates are solution-treated, with a temperature range of 1100-1150 and rapid cooling. Then it is aged at a temperature of 800 degrees Celsius and kept warm for 16 hours before air cooling. This heat treatment system can improve the strength and plasticity of the alloy and ensure that it has good comprehensive properties.
The main product forms of GH2018 (GH18) superalloys are cold-rolled sheet and hot-rolled medium and heavy plate. These products are widely used in the manufacture of combustion chamber parts for aero engines. Due to its high high-temperature strength and good oxidation resistance, this alloy is very widely used in the aviation field.
In the composition of GH2018 (GH18) superalloys, C, CR, NI, W, MO, AL, TI and Fe are the main elements. Among them, the content of element C is 0Below 06%, the content of elements such as CR, NI, W, MO and Al has certain range requirements. The content of these elements has an important impact on the properties of the alloy.
In general, GH2018 (GH18) superalloy is a deformed superalloy with excellent properties, and its manufacturing process requires a strict heat treatment regime to ensure its comprehensive properties. At the same time, the element content in its ingredients also needs to be strictly controlled to ensure that it meets the requirements of use.