GH4648 High temperature alloy

GH4648 superalloy has been listed in TSC printable material team

GH4648 is a Ni-Cr base precipitation hardening deformation superalloy, which can be used in 900℃ for a long time and can resist 1100℃ for a short time. GH4648 has excellent thermal corrosion resistance because it contains about 32% W (Cr). At the same time, the alloy has moderate strength and good resistance to fatigue and creep.

"Material Exploration"

The characteristics of this kind of material: high temperature; High resistance to heat and corrosion; Good cold processing and weldability; High specific strength; Good creep resistance and fatigue resistance.

Application: the alloy has been used to make advanced aero-engine combustor parts and other hot end parts, and the batch production and use is good. Alloys have been widely used in aeroengines abroad.

The call of a new craft

With the development of science and technology, aerospace engine structure in the direction of the lightweight, complicated and integrated development, the aerospace engine parts and components manufacturing technology put forward higher request, this also makes the disadvantages of the traditional "casting welding technology growing, parts in the structure design and innovation and development. Additive manufacturing provides a new tool for aerospace industry with its advantages of flexible manufacturing without mold, high design freedom and high material utilization rate.

The rapid development of science and technology, technological innovation for a long time. Adhering to the concept of "innovation-driven development", Xinjinghe R & D team is determined to forge ahead. On the basis of preliminary research, the laser selective melting forming process of GH4648 material is studied, a large number of experiments and tests are carried out, and the problem of laser selective melting forming process and performance optimization of GH4648 material is successfully overcome. The printed parts have compact metallographic structure, excellent mechanical properties and high dimensional accuracy.

GH4648 material characteristics and printing difficulties

GH4648 has a density of 8.28 g/cm3 and a melting temperature range of 1336℃~1353℃. Non-magnetic. In the chemical composition of the alloy, W and Mo play the role of solution strengthening, Al, Ti and Nb play the role of aging strengthening, and B and Ce play the role of grain boundary strengthening. The thermal strength of the alloy was improved by solution strengthening and aging strengthening.

The technical difficulties of this material are as follows: the high content of Al, Ti and Nb elements in GH4648 alloy leads to poor printing feasibility. At the same time, Cr content is up to 30%, which makes it difficult to optimize the printing process and control the organization.

performance

TSC r&d team always puts customer's needs first. Always keep high fighting passion, full of enthusiasm for work. Uphold the market concept of "innovation-driven, win-win cooperation" and the design concept of "make everything you want". To meet customer demand as its own responsibility, with technological innovation as the guide, continue to promote new materials, new technology and new equipment research and development, and continue to provide customers with high-quality and reliable products.