IN718镍基高温合金激光快速成形件组织和力学性能研究
Study on Microstructure and Mechanical Properties of IN718 Superalloy Deposited by Laser Rapid Forming
何绍华
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作者单位：（徐州工程学院 机电工程学院，江苏 徐州 221008）
中文关键字：IN718； 激光快速成形； 沉积态组织； 力学性能
英文关键字：IN718; laser rapid forming; structure in as-deposited; mechanical properties
中文摘要：利用IN718镍基高温合金粉末进行激光快速成形，得到激光快速成形件，然后进行热处理，讨论了经过激光快速成形所得到的沉积态和热处理后的组织特征。结果表明，沉积态的室温拉伸屈服强度和抗拉强度明显比热处理后的低，但塑性比热处理后的高。
英文摘要：IN718 Ni based superalloy powder was deposited by laser rapid forming (LRF) process, and then the samples were heat-treated, the microstructure and mechanical properties of the samples in deposited state and after heat treatment were discussed. The results show that the tensile strength of as-deposited LRF IN718 is lower than that of the heat-treated samples, but the ductility and elongation is better than that of the heat-treated samples.