METHOD FOR PREVENTING CRACKING OF NICKEL-BASED SUPERALLOY FABRICATED BY SELECTIVE LASER MELTING

A method for preventing cracking of nickel-based superalloy fabricated by selective laser melting (SLM) belongs to the field of additive manufacturing (AM). The method of preparing an as-built part with a high density, no crack defects, and good mechanical properties includes: reducing the content o...

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Bibliographische Detailangaben
Hauptverfasser: LIU, Zuming, ZHOU, Xu, AI, Yongkang, WEI, Bing, REN, Yake, NONG, Bizhong, LU, Sizhe, CAO, Bin
Format: Patent
Sprache:eng
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Zusammenfassung:A method for preventing cracking of nickel-based superalloy fabricated by selective laser melting (SLM) belongs to the field of additive manufacturing (AM). The method of preparing an as-built part with a high density, no crack defects, and good mechanical properties includes: reducing the content of elements Zr and B forming low melting point phase in a nickel-based superalloy, adjusting the total content of Al and Ti in the alloy to 4.5 wt % or below, and combining with the control of special SLM process parameters. The new method has the advantages of a reasonable component design, a simple preparation process, and good performance of the as-built part, and therefore is suitable for large-scale application.