{"id":10445,"date":"2026-08-26T14:55:09","date_gmt":"2026-08-26T06:55:09","guid":{"rendered":"https:\/\/am-material.com\/?p=10445"},"modified":"2026-07-22T14:56:45","modified_gmt":"2026-07-22T06:56:45","slug":"professional-guide-to-cm247lc-prep-spherical-powder-certification-and-testing","status":"publish","type":"post","link":"https:\/\/am-material.com\/ar\/news\/professional-guide-to-cm247lc-prep-spherical-powder-certification-and-testing\/","title":{"rendered":"Professional Guide to CM247LC PREP Spherical Powder Certification and Testing"},"content":{"rendered":"

\u0625\u062c\u0627\u0628\u0629 \u0633\u0631\u064a\u0639\u0629<\/h2>\n\n\n\n

CM247LC PREP spherical powder<\/strong> is a high-gamma-prime nickel superalloy powder produced by the plasma rotating electrode process, delivering the creep strength of the cast CM247LC blade alloy in a crucible-free, ultra-clean powder form for additive manufacturing and hot isostatic pressing. With roughly 65-70 volume percent gamma prime, the alloy sustains service temperatures to 1000-1050 C and offers creep rupture life comparable to directionally solidified cast material. PREP production gives sphericity above 0.95, oxygen content at or below 150 ppm, and virtually no ceramic inclusions, making the powder the premium choice for turbine blade repair, hot-section components, and high-integrity rotating parts where powder cleanliness directly governs fatigue performance.<\/p>\n\n\n\n

\u0627\u0644\u0645\u0645\u062a\u0644\u0643\u0627\u062a<\/th>\u0627\u0644\u0642\u064a\u0645\u0629<\/th><\/tr><\/thead>
\u0646\u0638\u0627\u0645 \u0627\u0644\u0633\u0628\u0627\u0626\u0643<\/td>Ni-based gamma-prime superalloy (cast-blade grade)<\/td><\/tr>
Gamma Prime Fraction<\/td>65-70 vol%<\/td><\/tr>
\u0627\u0644\u0643\u062b\u0627\u0641\u0629<\/td>8.54 g\/cm3<\/td><\/tr>
Typical Powder Size<\/td>45-106 um (HIP\/EBM), 53-150 um (DED)<\/td><\/tr>
Sphericity (PREP)<\/td>>= 0.95<\/td><\/tr>
\u0645\u062d\u062a\u0648\u0649 \u0627\u0644\u0623\u0643\u0633\u062c\u064a\u0646<\/td><= 150 ppm<\/td><\/tr>
\u062f\u0631\u062c\u0629 \u0627\u0644\u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u0642\u0635\u0648\u0649 \u0644\u0644\u062e\u062f\u0645\u0629<\/td>1000-1050 C<\/td><\/tr>
\u0627\u0644\u0645\u064a\u0632\u0629 \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/td>Blade-grade creep strength with crucible-free powder cleanliness<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

What Is CM247LC PREP Spherical Powder and Its Material Benefits<\/h2>\n\n\n\n

CM247LC PREP spherical powder<\/strong> belongs to the \u0645\u0633\u0627\u062d\u064a\u0642 \u0623\u0633\u0627\u0633\u0647\u0627 \u0627\u0644\u0646\u064a\u0643\u0644<\/a> family and is the powder-metallurgy form of CM247LC, a low-carbon derivative of the MAR-M247 cast superalloy originally developed for directionally solidified and single-crystal turbine blades. The chemistry is deliberately retained from the cast alloy: a nickel matrix strengthened by a very high fraction of ordered Ni3(Al,Ti,Ta) gamma prime, plus heavy solid-solution elements such as tungsten and tantalum and a grain-boundary package of hafnium, carbon, boron, and zirconium.<\/p>\n\n\n\n

The defining difference lies in how the powder is made. The \u0639\u0645\u0644\u064a\u0629 \u0627\u0644\u0642\u0637\u0628 \u0627\u0644\u062f\u0648\u0627\u0631 \u0628\u0627\u0644\u0628\u0644\u0627\u0632\u0645\u0627 (PREP)<\/a> melts the tip of a rotating alloy bar with a plasma arc and ejects droplets centrifugally into an inert chamber. Because no ceramic crucible or nozzle contacts the melt, the powder avoids the ceramic inclusions that limit fatigue life in gas-atomized superalloy powder, and oxygen pickup stays exceptionally low.<\/p>\n\n\n\n

For hot-section engineering, this combination delivers concrete benefits:<\/p>\n\n\n\n