采用LBW+SPF组合技术制造Inconel718合金多层夹芯板结构.为了增强多层夹芯板结构使用时的安全性,研究其热处理技术.结果表明:Inconel718合金在焊接过程产生了Nb含量较高的Laves沉淀相;超塑成形后焊缝中的Nb元素的偏析问题得了缓解;经980℃固溶30min处理后,焊缝中的δ相完全回溶母体γ相,焊缝中母体γ相的Nb元素含量继续升高,但仍有Laves相未溶解;经1080℃固溶30min后焊缝中的Laves相完全溶解,解决了Nb元素的偏析问题.1080℃固溶后母材的晶粒显著长大,屈服强度比成形后有所下降.
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