论文部分内容阅读
引言蠕变系金属在一定温度和应力作用下的一种粘性流动现象。无论是蒸汽轮机,还是燃汽轮机都可能经受这种蠕变变形。本文将着重研究在最大蒸汽温度高达540～560℃下工作的蒸汽轮机之材料的蠕变特性。试验室的专家们对这种蠕变变形是非常关注的。很容易想象到,电阻式传感器能连续地记录蠕变曲线。但遗憾的是,这一设想还远远没有实现。要实现这一点,首先必须配置长时稳定性好的传感器。然而,即使采用低速记录仪,描绘的二级蠕变阶段的几组应力-温度关系曲线几乎还是水平的,难于做出评定。我们想在这里论述如何应用计算机技术来解决蠕变试验中的一些关键问题。
INTRODUCTION Creep-based metal is a viscous flow phenomenon under certain temperature and stress. Both steam turbines and gas turbines are likely to experience this creep deformation. This article will focus on the creep behavior of materials for steam turbines operating at maximum steam temperatures of 540-560 ° C. Laboratory experts are very concerned about this creep deformation. It is easy to imagine that resistive sensors continuously record creep curves. However, this idea is far from realized. To achieve this, we must first configure the long-term stability of the sensor. However, even with low-speed recorders, the set of stress-temperature relationships plotted in the second-order creep phase is almost level and difficult to assess. We would like to discuss here how to apply computer technology to solve some of the key issues in creep testing.