| GH3128高温拉伸强度设计方法的优化 |
| 赵熹, 原鲲, 周羽 |
| 清华大学 核能与新能源技术研究院, 先进核能技术协同创新中心, 先进反应堆工程与安全教育部重点实验室, 北京 100084 |
| Optimization of the high temperature tensile strength design method for the GH3128 Alloy |
| ZHAO Xi, YUAN Kun, ZHOU Yu |
| Key Laboratory of Advanced Reactor Engineering and Safety of the Ministry of Education, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China |
摘要:
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| 摘要国产镍基高温合金GH3128在高温下具有良好的强度, 有望成为超高温气冷堆(very high temperature reactor, VHTR)核心部件中间换热器(intermediate heat exchanger, IHX)的主要结构材料。该文针对美国机械工程师协会(American Society of Mechanical Engineers, ASME)标准应用于GH3128时无法在全温度段得到一致可靠设计余量的不足, 采用正态分布直接计算的方法, 通过整体多项式、分段多项式以及分段指数这3种拟合方式, 对拉伸性能设计许用值进行了计算。分析结果表明: 针对现有的GH3128拉伸性能数据, 应分别采用分段多项式拟合及分段指数拟合来求抗拉强度和屈服强度的设计许用值, 并且这种方法给出的设计许用值曲线可以在全温度区间给出一致可靠的设计余量, 可作为超高温气冷堆中间换热器结构设计的参考依据。 | |||
| 关键词 ：超高温气冷堆(VHTR),中间换热器(IHX),GH3128,拉伸强度 | |||
| Abstract：GH3128, a domestic Ni-based superalloy, has good high-temperature performance and is a promising main structural material for intermediate heat exchangers (IHX) which are the key component in very high temperature reactors (VHTR). The existing American Society of Mechanical Engineers (ASME) standard is shown to be inappropriate. Then, 3 fitting methods (single polynomial fit, 2-step polynomial fit and 2-step exponential fit) are used to calculate the allowable design strengths for the tensile strength. The results show that the 2-step polynomial fit method should be used for the ultimate tensile strength with the 2-step exponential fit method for the yield strength. These design curves give consistent and reliable design margins for the structural design of IHX. | |||
| Key words：very high temperature reactors (VHTR)intermediate heat exchangers (IHX)GH3128tensile strength | |||
| 收稿日期: 2015-03-19 出版日期: 2015-11-09 | |||
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| 通讯作者:原鲲, 副研究员, E-mail: kyuan@mail.tsinghua.edu.cnE-mail: kyuan@mail.tsinghua.edu.cn | |||
| 引用本文: |
| 赵熹, 原鲲, 周羽. GH3128高温拉伸强度设计方法的优化[J]. 清华大学学报（自然科学版）, 2015, 55(9): 998-1002. ZHAO Xi, YUAN Kun, ZHOU Yu. Optimization of the high temperature tensile strength design method for the GH3128 Alloy. Journal of Tsinghua University(Science and Technology), 2015, 55(9): 998-1002. |
| 链接本文: |
| http://jst.tsinghuajournals.com/CN/或 http://jst.tsinghuajournals.com/CN/Y2015/V55/I9/998 |
图表:
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| 图1 GH3128拉伸性能 |
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| 表1 容限系数与容限范围母体比例的对应关系 |
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| 表2 不同拟合方式SD 值对比 |
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| 图2 整体多项式拟合的拉伸性能设计许用值曲线 |
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| 图3 分段多项式拟合的拉伸性能设计许用值曲线 |
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| 图4 分段指数拟合的拉伸性能设计许用值曲线 |
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| 图5 拉伸数据与平均曲线偏差直方图 |
参考文献:
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