The editor, who had just entered the job after leaving school, mistakenly entered the factory and became a metallographic sample making engineer, working in the metallographic laboratory; Skilled workers;, One grinding is a week, grinding and grinding on metallographic sandpaper with samples in hand all day long!


The small sample block is in hand, grinding with P80 metallographic sandpaper on the left, continuing with P320 metallographic sandpaper on the right, replacing with P600 and P1000, grinding and grinding, grinding and grinding&hellip& Hellip;. My teacher gave me a sample and divided it into three, five, and two, which takes 3-5 minutes to complete. Looking at this sample block in my hand again, the more I grind it, the deeper the scratches. It's difficult to make sure that the surface of the sample has changed color. What kind of sandpaper is this? Why is it so difficult to use? The sample cannot be ground out, it's all caused by metallographic sandpaper! Change one sheet, then another, until a large pile of metallographic sandpaper was piled up in front of me that had only been ground a few times before being scrapped, and was severely criticized by the teacher Fu! These days, I've been getting tired a lot. One of these days, I've been feeling dizzy and dizzy. Besides being sad, I've also been particularly aggrieved.


Do you treat me as an intern and give me all the metallographic sandpaper that is defective? Or is it difficult to grind samples for me? Thinking like this, carefully observe the sample in the teacher's hand. It is the same as mine. It uses the same grinder and the same metallographic sandpaper.


People often look for objective factors when things are not done well. Okay, we need to calm down and review what's wrong with ourselves. As we are currently doing, we have wasted a lot of materials, wasted a lot of effort, and the samples have not been well ground. If we continue to work like this, don't do it. If they don't dismiss us, let's take the initiative to resign and occupy a position, consuming costs without creating value. This is not the style of the editor.

    Well, after going to work today, the editor has developed a new mindset and changed his previous heavy workload; Bad habits;, First, pour a cup of tea for the teacher and ask for advice from others. Teacher Fu also changed his previous seriousness and patiently explained the steps and precautions of grinding to the editor. Firstly, he should hold the sample block firmly with his thumb, middle finger, and index finger, and keep it level (as shown in the figure above). Secondly, he should apply light and even force to the sample block at the beginning. While grinding, he should take it up and observe it with the naked eye until the surface is very smooth and even. After taking it out, he should clean the surface of the sample block with water, and then replace it with finer metallographic sandpaper, Turn the sample block 90? Repeat the above steps after turning the corner. There is basically no problem grinding it down like this. As the proficiency and feel of grinding improve, the force on the hands can be appropriately increased to improve grinding efficiency.

    Not to mention, with the guidance of the old master, today's sample can finally be ground. I am really happy in my heart, and I believe I can definitely do this job better.
In addition, I also understood a truth that the metallographic samples of the editor were not well ground. It was not the metallographic sandpaper that caused the trouble, it was the wrong method, and the technique was not proficient enough.