Brown Fused Alumina Oxide, White Fused Alumina Sieve Particle Size Test Method
For stainless steel parts that require deburring and burr removal after stamping, the effect of using white corundum natural abrasive material for grinding is better than using resin-based plastic abrasive materials. For die-cast zinc alloy hardware parts or aluminum alloy hardware parts, resin-based plastic abrasive materials should be used. If brown corundum abrasive materials are used, it is easy to scratch the product.
For iron, stainless steel, white iron, powder metallurgy (magnet) magnetic cores, aluminum alloy, zinc alloy, copper, plastic and other materials, it is recommended to choose the high alumina ceramic polishing abrasive material with excellent surface polishing, rough grinding, precision grinding, gloss polishing, pre-plating fine grinding and vibration performance for grinding.
For the problem of rust on various hardware parts, grinding agents with rust prevention function can be selected for polishing and grinding. Grinding agents also have functions such as oil removal, cleaning, rust prevention and gloss protection, lubrication buffering and reducing grinding stone loss, making them ideal for your first choice for polishing and grinding.
Each type of parts has a corresponding brightness effect. Therefore, the brightness agent is used to make the product bright after polishing or during the polishing process. It can be used in various types of grinding machines and polishing machines as a chemical aid for surface polishing of parts. Based on the performance of the abrasive materials described in the table above, we can flexibly choose suitable grinding and polishing materials for products of different materials.
The most commonly used abrasive materials in abrasive tools are mainly brown corundum, white corundum, black silicon carbide and green silicon carbide.
Brown corundum has high toughness and is suitable for abrasive materials with high tensile strength such as carbon steel, alloy steel, malleable cast iron and hard bronze. White corundum is harder than brown corundum and has better cutting performance. It is suitable for the fine grinding process of quenched steel, high carbon steel, high-speed tool steel and other materials.
Black silicon carbide has high hardness, is brittle and sharp, and is suitable for grinding and cutting materials with low tensile strength, such as cast iron, glass, ceramics, stones, refractory materials, etc.
Green silicon carbide, including green silicon carbide powder, has higher purity than black silicon carbide and is suitable for grinding hard and brittle materials such as hard alloys, optical glass, gems, agates, etc.
Abrasive tools have natural abrasive tools and artificial abrasive tools. Natural abrasive tools are commonly used in the mechanical industry. Artificial abrasive tools are classified into five categories according to their shape and structural characteristics, including grinding wheels, grindstones, oilstones, sand tiles and coated abrasive tools. In addition, the grinding agent is also classified as an abrasive tool.
The tool for natural abrasive material, also known as the grinding tool, is the tool that shapes the workpiece by grinding, and is also the carrier of the grinding agent. Its hardness should be lower than that of the workpiece, and it should have a certain degree of wear resistance. It is commonly made of gray cast iron. The metallographic structure of the wet grinding tool is mainly ferrite, while the dry grinding tool is based on uniformly distributed fine pearlite. When grinding small-sized parts with M5 threads or complex shapes, soft steel grinding tools are often used. When grinding small holes and soft metal materials, brass and bronze grinding tools are mostly used. The grinding tool should have sufficient rigidity, and its working surface should have high geometric accuracy. The precision of the grinding tool can be improved to be higher than its original precision by proper operation, so that the machining accuracy of the workpiece can be higher than that of the original grinding tool.
