一种高温合金制品及其大层厚选区激光熔化制备方法
By optimizing the selective laser melting and remelting processes for thick layers, the problems of long forming time and weak bonding force of GH4169 high-temperature alloy components were solved, realizing the preparation of high-efficiency and high-performance GH4169 high-temperature alloy products with high density and excellent mechanical properties.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CENT SOUTH UNIV
- Filing Date
- 2025-07-16
- Publication Date
- 2026-07-17
AI Technical Summary
When preparing GH4169 high-temperature alloy components with high thickness, the existing technology has problems such as long forming time, high requirements for equipment and process stability, weak interlayer bonding and increased interlayer unfused porosity under large layer thickness.
By optimizing the thick selective laser melting process and combining it with a specific remelting process, the low-defect laser melting process window was determined. The instability of the molten pool was calculated using the number of keyholes Ke=ηP/[(T1-T0)πρCp(αvr3)0.5]. The laser power of 350-400W, the scanning speed of 900-1000mm/s, and the laser remelting parameters were selected. Selective laser melting and remelting were carried out layer by layer to prepare high-temperature alloy products.
The efficient and high-performance preparation of GH4169 high-temperature alloy products has been achieved, with a density of 99.6%, a room temperature tensile yield strength of 1310 MPa, a tensile strength of 1470 MPa, and an elongation of 16.0%, while reducing the preparation cost.
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Figure CN120839082B_ABST