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There is talent, there is material, there is future | GH4648 high temperature alloy

Author： Radium laser

2021-09-15

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GH4648high temperature alloy

GH4648High-temperature alloy successfully listed in Xin Refined Printable Material Team

GH4648It's Ni-CrThe base precipitation hardening deformation high temperature alloy can be used for a long time at 900 ℃ and can resist the working temperature of 1100 ℃ for a short time. GH4648 has excellent hot corrosion resistance due to its content of about 32% w(Cr). At the same time, the alloy has medium strength and good fatigue and creep resistance.

 

"Material exploration"

The characteristics of this kind of material: high temperature; strong hot corrosion resistance; good cold workability and weldability; high specific strength; good creep resistance and fatigue resistance.

Applications: The alloy has been used to make advanced aero-engine combustion chamber components and other hot end components, with good batch production and use. Alloys have been widely used in foreign aero-engines.

 

The Call of New Technology

With the development of science and technology, the structure of aerospace engines is developing in the direction of light weight, complexity and integration, which puts forward higher requirements for the manufacturing process of aerospace engine parts, which also makes the traditional"The disadvantages of "casting, forging and welding" process have become increasingly prominent, which seriously restricts the structural design and innovative development of parts.Additive manufacturing provides a new tool for the aerospace industry with its advantages of flexible manufacturing without mold, high design freedom and high material utilization.

The rapid development of science and technology, technological innovation for a long time. Uphold“Innovation-driven development"The concept of Xin Jinghe research and development team is determined to forge ahead. On the basis of preliminary research, it has carried out research on selective laser melting forming process of GH4648 material, carried out a large number of experiments and tests, and successfully overcome the difficult problems of selective laser melting forming process and performance optimization of GH4648 material, and its printed partsThe metallographic structure is compact, the mechanical properties are excellent, and the dimensional accuracy is high.

 

GH4648Material characteristics and printing difficulties

GH4648The density of 8.28g/cm3The melting temperature range is 1336 ℃ ~ 1353 ℃. Non-magnetic. In the chemical composition of the alloy, W and Mo play the role of solid solution strengthening, Al, Ti and Nb play the role of aging strengthening, and B and Ce are used to strengthen the grain boundaries.The thermal strength of the alloy is improved by solid solution strengthening and aging strengthening.

The technical difficulties of this material printing are:GH4648Al in alloyTi, Nb element content is higher, printing feasibility is poor. At the same time, the content of Cr element is as high as 30%, which leads to the difficulty of printing process optimization and tissue regulation.

 

Performance

Xin Jinghe R & D team always puts what customers want and need first. Always keep high fighting passion and full of enthusiasm for work. Adhering to the "innovation-driven, win-win cooperation" market concept and "manufacturing everything you want" design concept. In order to meet customer needs as its own responsibility, technological innovation as the forerunner, continue to promote the research and development of new materials, new processes and new equipment, and continue to provide users with high-quality and reliable products.

Additive Manufacturing

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The 12th International Forum on Civil Aircraft Industry Held, Metal 3D Printing Technology Helps Aerospace Industry Take Off

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