1) erosion damage
冲蚀损伤
1.
This article briefly introduces the mechanisms and harmfulness of erosion damage on the blades based on the investigations of their operation conditions.
该文在深入调查大机组末级长叶片运行情况的基础上 ,简要介绍了末级长叶片冲蚀损伤的机理及其严重危害性 ,着重指出近几年随着新出现的大机组长期带低负荷参与调峰运行 ,相当普遍地发生了末级长叶片出汽侧的冲蚀损伤 ;在北方地区某些机组上叶片进汽侧也发生大范围 (在叶顶防蚀区以下 )的冲蚀损伤。
2) impact damage and penetration
冲击损伤及侵蚀
1.
The smoothed particle hydrodynamics(SPH) technique in conjunction with the macro-homogeneous, anisotropy material concept for fiber composites has been proposed for the simulation of impact damage and penetration of composite structure.
与纤维复合材料的宏观各向同性及各向异性概念相结合的光滑粒子流体动力学技术SPH(The smoothed particle hydrodynamics),已用来模拟复合材料结构的冲击损伤及侵蚀。
3) pitting attack damage
点蚀损伤
1.
By the examination of metallographic microstructure and the hardness analysis of failure gear after used, the main reason that the pitting attack damage appears on the surface of gear was found.
通过对使用后失效齿轮的金相组织检验及硬度分析,找出齿轮表面产生点蚀损伤的主要原因,并提出了相应的改进措施。
4) Corrosion damage
腐蚀损伤
1.
Research of corrosion damage of aluminum alloy based on the fractal theory
基于分形理论的铝合金腐蚀损伤研究
2.
It is concluded from the analysis of temperature distribution and mechanism perfonnance of the tubes of direct fired heaters on long-distance pipelines that the heater tubes are mainly subject to corrosion damage in the temperature below 300 oC and to creep damage in the temperature above 300 oC.
通过对长输原油管道直接式加热炉炉管温度分布和力学性能的测试分析,认为加热炉炉管 300℃以下只有腐蚀损伤,温度高于350℃时,炉管主要是蠕变损伤。
3.
In this paper,a general review on corrosion damages of the alloys and the relevant mechanisms were given.
收集、整理和分析了Al-Cu -Mg系列铝合金常见的腐蚀损伤和腐蚀原因 ,并介绍了相应的防腐措施 。
6) etching damage
刻蚀损伤
1.
The advantage of SiO2 deposited by PECVD was reviewed and the influence of selection and ratio of the reaction gases on controlling of lateral etching was analyzed,and the etching damage was preliminarily analyzed as well.
主要研究了GaAlAs/GaAs多层结构波导的ICP(inductively coupled plasma)刻蚀,评述了使用PECVD制作的Si O2做掩膜的优点,分析了气体选择比对侧向钻蚀控制的影响,并初步分析了刻蚀损伤。
补充资料：冲蚀
冲蚀
erosion corrosion
ehongsh-冲蚀(erosion corrosion)金属材料表面与腐蚀流体冲刷的联合作用，而引起材料局部的金属腐性。在发生这种腐蚀时，金属离子或腐蚀产物因受高速腐蚀流体冲刷而离开金属材料表面，使新鲜的金属表面与腐蚀流体直接接触，从而加速了腐蚀过程。若流体中悬浮较硬的固体颗粒，则将加速材料的损坏。一般说来，流体的速度愈高，流体中悬浮的固体颗粒愈多、愈硬，冲刷腐蚀速度愈快。腐蚀介质流动速度又取决于流动方式:层流时，由于流体的粘度，在沿管道截面有一种稳态的速度分布;湍流时，破坏了这种稳态速度分布，这不仅加速了腐蚀剂的供应和腐蚀产物的迁移，而且在流体与金属之间产生切应力，能剥离腐蚀产物，从而加大了冲蚀速度。因此，在管道的拐弯处及流体进入管道或贮罐处容易产生这种破坏。另外，金属表面成膜的特征也可以影响冲蚀速度。硬的、致密的、连续的、粘附性强的膜冲蚀速度小，反之则大。抑制或减少冲蚀的措施是:选择耐蚀性和耐磨性好的材料;改变腐蚀环境如添加缓蚀剂，过滤悬浮固体粒子，降低温度，减小流速和湍流;采用栖牲阳极作阴机保护等。 (1陈树俊l)
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条