基于Thermo-Calc和JMatPro模拟计算的新型镍基合金设计
发布时间:2018-03-01 19:03
本文关键词: Thermo-Calc JMatPro Nimonic 合金 HRC合金 出处:《材料热处理学报》2017年04期 论文类型:期刊论文
【摘要】:运用Thermo-Calc和JMatPro热力学模拟软件对镍基Nimonic 105合金进行了成分优化以及新合金设计研究。研究表明,通过降低Co、Cr和Mo元素含量可有效降低Nimonic 105合金中μ相的析出温度,同时也可降低700℃时合金中σ相的析出倾向。通过调整Nimonic 105的部分合金元素配比设计了一种新型镍基合金HR105C。HR105C合金在700~1200℃区间无σ相和μ相等有害相。在700℃时HR105C合金中γ'相和M_(23)C_6相的平衡析出量的摩尔分数分别约为32%和1%,γ'相的析出略高于Waspaloy合金。HR105C合金的持久性能较Nimonic 105合金显著降低,但与Waspaloy合金相当,甚至可能略优于Waspaloy合金,可满足700℃参数火电汽轮机高温部件用材设计要求,达到了预期优化设计目的。另外,拥有小尺寸的γ'相的HR105C合金具有更好的持久性能。可采取措施通过提高γ'相的稳定性来减缓γ'相的粗化速率,进而使HR105C合金的持久性能得到提升。
[Abstract]:The composition optimization and new alloy design of Ni-base Nimonic 105 alloy were studied by means of Thermo-Calc and JMatPro thermodynamics simulation software. The results show that the precipitation temperature of 渭 phase in Nimonic 105 alloy can be effectively reduced by reducing the content of CoCr and Mo elements. The precipitation tendency of 蟽 phase in the alloy can also be reduced at 700 鈩,
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