Incoloy 800HT is a nickel-chromium-iron alloy with the same basic composition as Incoloy 800, but with a significant increase in creep rupture strength through strict control of carbon, aluminum, and titanium content. This alloy retains good strength at high temperatures and has excellent resistance to oxidation and carburizing. In addition, it is resistant to corrosion in many aqueous environments. The chemical composition of IncoloY800HT contains about 30% nickel and 20% chromium, with iron being the main remaining component.
Incoloy 800HT superalloys can be formed and machined by a hot working process. Here are some common thermal processes:
1.Hot rolling: Hot rolling is the heating of the Incoloy 800HT superalloy to the appropriate temperature range (usually 1100-1200°C), and then the material is pressed into the desired shape (such as plates, strips, etc.) by rolling machinery. Hot rolling can change the thickness, width, and length of the material, improving the plasticity and machinability of the material.
2.Hot Extrusion: Hot extrusion is the process of heating the Incoloy 800HT superalloy to a certain temperature, and then extruding the material into the desired shape (such as tubes, bars, etc.) through an extruder. Hot extrusion can change the cross-sectional shape and size of the material, and improve the compactness and mechanical properties of the material.
3.Hot Forging: Hot forging is the process of heating the Incoloy 800HT superalloy to the appropriate temperature, and then applying pressure to shape the material into the desired shape (such as forgings, shafts, etc.) by the forging machinery. Hot forging can change the shape and structure of the material, improving the strength and toughness of the material.
Before proceeding with thermal processing, the following points need to be noted:
Ensure the cleanliness and stability of thermal processing equipment and tools to avoid the effects of impurities and uneven heating on material properties.
Control the heating temperature and holding time to ensure that the material reaches the proper processing temperature range and maintains enough time for uniform heating.
During thermal processing, appropriate protective measures, such as an inert atmosphere or vacuum environment, are required to prevent the material from reacting with gases such as oxygen and oxidizing.
It is important to note that the specific thermal processing parameters and processes will vary depending on the shape, size, and application needs. Therefore, it is advisable to consult with a material supplier or professional for specific thermal processing process advice before proceeding with thermal processing.