1) erosion mechanism
冲蚀机制
1.
A summary was made from three aspects, which are the influence of environment parameters including impact angle, impact velocity, erosion time, and target characters containing hardness, microstructure, fracture toughness on erosion behavior, and the present erosion mechanism.
本文介绍了近年来在陶瓷颗粒增强金属基热喷涂层以及烧结块体材料冲蚀行为方面的研究结果,并从攻角、冲蚀粒子速度、冲蚀时间等环境参数,靶材硬度、显微结构和断裂韧性对冲蚀的影响以及冲蚀机制等三个方面进行评价。
2) erosive mechanism
冲蚀失效机制
3) erosion wear mechanism
冲蚀磨损机制
1.
The erosion wear surfaces of 40Cr and 45# steel were observed on the scanning electron microscope (SEM),it is showed that the erosion wear mechanism of 40Cr and 45# steel is the micro-cutting effect of hard sand on the material surface.
在电子显微镜(SEM)下对40Cr和45#钢冲蚀磨损表面形貌进行观察,分析表明40Cr和45#钢的冲蚀磨损机制都是硬质砂粒对材料表面的微切削作用。
2.
The erosion wear surfaces of QT500 and HT200 were observed on the scanning electron microscope(SEM),it is showed that the erosion wear mechanism of QT500 is the hard sand's micro-cutting effect on the material's surface,and the mechanism of HT200 is the brittlen.
在电子显微镜(SEM)下对QT500和HT200冲蚀磨损表面形貌进行观察,分析表明:QT500的冲蚀磨损机制是硬质砂粒对材料表面的微切削作用,而HT200的冲蚀磨损机制是因赫兹裂纹导致的脆性脱落。
4) erosion control
冲蚀控制
5) erosion mechanism
冲蚀机理
1.
Study on Erosion Mechanisms and Polishing Technology of Hard-Brittle Materials Machined with Precision Abrasive Waterjet;
精密磨料水射流加工硬脆材料冲蚀机理及抛光技术研究
2.
Combination simulation method with SEM technology,erosion mechanisms of BAT nozzle is researched.
结合仿真技术和扫描电镜技术,分析了BAT喷嘴的冲蚀机理。
6) erosion pilot
冲蚀控制器
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)
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