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分析断裂原因或断裂机理的最好办法是用扫描电镜进行断口形貌分析。为了使断口在切取时不受污染,往往用AC试纸覆盖在断口表面进行保护,但是,AC试纸却难以清除干净。特别是凸凹不平较大的断口,AC试纸往往嵌在较深的韧窝中,使清理工作变得更加复杂。若不覆盖AC试纸而直接在锯床上慢慢切,则硬度较高的试样就无法加工。几年来,我们摸索出一种快速切取断口而又便于清洗的好办法:将断口沾上干净的机油或变压器油(油不应受到污染)就可将试样放在金相砂轮切样机上快速切取,只要冷
The best way to analyze the fracture mechanism or fracture mechanism is to use SEM to analyze the fracture morphology. In order to make the fracture when cutting not contaminated, often with AC test paper covered in the fracture surface protection, but AC test paper is difficult to remove clean. In particular, the larger the rugged fracture, AC test strips are often embedded in the deeper dimples, making the cleaning work more complicated. If you do not cover the AC test paper and cut slowly in the sawing machine, then the higher hardness of the specimen can not be processed. Over the years, we have come up with a quick way to cut the fracture and make it easy to clean: Place the fracture with a clean oil or transformer oil (the oil should not be contaminated) to place the sample on the metallographic grinding wheel Cut, as long as cold