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首页> 外文会议>International Conference on Life Management and Life Extension of Power Plant May 18-20, 2000, Xi'An, China >Creep damage property and life evaluation of Mod.9Cr-1Mo steel
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Creep damage property and life evaluation of Mod.9Cr-1Mo steel

机译：Mod.9Cr-1Mo钢的蠕变损伤性能和寿命评估

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摘要

In order to establish methodology of life evaluation of Mod.9Cr-1Mo steel, the following creep tests were conducted. By creep interruption test, changes in hardness during creep were found essentially the same under various conditions and hardness after rupture to mainly depend on stress. Creep life ratio was thus evaluated on the basis of hardness change ratio. Hardness change ratio is calculated from (1) initial hardness (2) hardness at inspection time (3) final hardness. The relationship between hardness change ratio and creep life ratio is the same for all test conditions and permits estimations of life ratio based on hardness change ratio and margin of error of +-0.1. This method requires initial and final hardness data, which are lacking in many cases and thus must be assumed. Inital hardness depends on tensile strength and PWHT (Post Weld Heat Treatment), and final hardness on stress. Based on estimated hardness life ratio can be determined within +-0.15 error.
机译：为了建立Mod.9Cr-1Mo钢的寿命评估方法，进行了以下蠕变测试。通过蠕变中断试验，发现蠕变期间的硬度变化在各种条件下基本相同，并且断裂后的硬度主要取决于应力。因此，基于硬度变化率评价蠕变寿命率。硬度变化率由（1）初始硬度（2）检查时的硬度（3）最终硬度算出。硬度变化率和蠕变寿命比之间的关系在所有测试条件下都是相同的，并允许根据硬度变化率和+ -0.1的误差范围估算寿命。此方法需要初始和最终硬度数据，在许多情况下这些数据是缺少的，因此必须假定。初始硬度取决于抗张强度和PWHT（焊后热处理），最终硬度取决于应力。基于估计的硬度寿命比可以确定在±0.15误差范围内。

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