Knowledge Column
4C+F ? Beginner’s Guide for Diamond Players
Diamonds We Know Diamond, the first of the five precious stones, symbolizes flawless purity, fidelity and eternal sparkle, and is the best symbol of love. The diamond ring has become the most important token of marriage. Diamonds have also steadily increased in value by 5%-10% or more each year, making them a luxury item that …
Metallographic sandpaper, the right choice for perfect results
Metallographic sample preparation process, whether it is metal or composite materials, electronic materials, etc., the use of metallographic sandpaper is basically the first process of sample preparation, the purpose is to remove the damage caused by the cutting process and deformation of the layer, which belongs to the coarse grinding process, in order to prepare for the subsequent polishing, so this process is a rather critical step, if not dealt with properly will affect the effect of the subsequent process, or even lead to the test sample grinding can not If not handled properly, it will affect the results of the subsequent processes, or even lead to the failure of sample grinding and the inability to carry out the final metallographic analysis. In view of this, Chain metallographic editor has a few suggestions to share with friends, I believe it can bring help to your sampling work.
How to choose the right grinding wheel for tool grinding?
There are many types of grinding wheels and various shapes and sizes, and each type of grinding wheel has a certain range of applicability according to the abrasive material of the grinding wheel, the bond material and the manufacturing process. If not properly selected will directly affect the processing accuracy, surface roughness and production efficiency. Therefore, the grinding process, must be based on the specific circumstances of the selection of the appropriate grinding wheel. Then how to choose the correct grinding wheel? For grinding in the commonly used grinding wheel to summarize, so that we understand the selection of grinding wheels.
What are the diamond grinding (work) tools?
Diamond is one type of superhard material and cubic boron nitride is another. The two kinds of superhard materials after a series of machining and processing procedures can be made into a variety of tools and directly with them into a variety of functional devices, collectively referred to as superhard material products.
Mirror machining is realized in several ways
Mirror machining means that the machined surface can reflect the image like a mirror, this level has reached a very good quality of the surface of the workpiece, mirror machining is not only able to create a high “face value” for the product, but also reduces the notch effect and extends the fatigue life of the workpiece; it has an important significance in a lot of assemblies and sealing structures.
Platinum rings are polished to reduce weight? There’s some wear and tear.
Platinum rings are often worn after a long period of time, not only will there be scratches on the top of the ring, but also easy to become dull, this time we need to re-sanding and polishing, then platinum rings after polishing will not lose weight?
Six mold polishing techniques: How many do you know?
The primary goals of polishing molds are to increase the brightness and aesthetics of plastic molds and to make demolding easier.
Identification Characteristics of Diamonds and Simulants
Gemstone (Gem) Mohs hardness (Hardness) Specific Gravity (Specific Gravity) Refractive Index (Refractive Index) Reflectivity (Reflectivity) Double Refraction (Double Refraction) Dispersion (Dispersion) Synthetic Rutil (Synthetic Rutil) 6.5 4.25 2.76 19.75 0.287 0.330 Synthetic Moissanite (Synthetic Moissanite) 9.25 3.22 2.67 20.67 Strained 0.104 Lithium Niobate (Lithium Niobate) 5.5 4.64 2.55 14.87 0.090 0.130 Diamond (Diamond) 10 3.52 …
Identification Characteristics of Diamonds and Simulants Read More »
Sintering mechanism
The specific surface area of the powder surface will change because of the size of the powder particles, when the powder particles are large, the specific surface area will decrease, when the powder particles are small, the specific surface area will increase, the size of the specific surface area relates to the size of the …
