Application of MIM Process for Nickel Base Superalloy
Application of MIM Process for Nickel Base Superalloy
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DOI：
10.2497/jjspm.58.33
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
Hikaru Ikeda;T. Iwahashi;Toshiko Osada;H. Miura
中科院分区：
文献类型：
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作者：
Hikaru Ikeda;T. Iwahashi;Toshiko Osada;H. Miura
高温合金由于其优异的耐腐蚀性、抗氧化性和高温强度等特性，已被特别用于航空航天和原子能应用领域。Inconel 718是典型的镍基高温合金之一。然而，由于其加工性能差，不容易以低成本生产复杂形状的零件。在这项研究中，金属注射成型（MIM）工艺，近净成形的粉末之一，已被应用到制造Inconel 718合金压坯使用不同类型的粉末，气体和水雾化粉末。通过优化MIM工艺，获得了相对密度接近全密度（98 ~ 99%）的合金，烧结态的抗拉强度为1000 MPa，延伸率为10%左右，与锻造材料相当。经热处理后，合金的抗拉强度提高到1250 MPa，伸长率提高到8%左右。
Superalloys have been used especially for aerospace and atomic energy applications because of their excellent attributes of high corrosion and oxidation resistance, and high temperature strength. A Inconel 718 is one of representative Ni-base superalloys. However, it is not easy to produce the complicate shaped parts with low cost due to their poor workability. In this study, Metal Injection Molding (MIM) process, one of near net-shape forming of powders, has been applied to fabricate the Inconel 718 alloy compacts using different type of powders; gas and water atomized powders. By optimizing the MIM process, their obtained relative density was near full density (98∼99 %) and the tensile property of as-sintered compacts was the strength of 1000 MPa and the elongation of around 10 %, which are similar to those of wrought materials. The tensile properties were improved to the strength of 1250 MPa and the elongation of around 8 % by heat treatment.