Technical Topics-第11页-Changsha Langfeng Metallic Material Co., Ltd.

Spray and spray process distinction
① spray coating and spray coating layer and the combination of the formation of the base metal is different, nickel-coated aluminum flame spray through the radiation heating chemical reaction occurs in the sandblasting rust Sa3, RZ> 50μm carbon steel surface micro-metallurgical Combination of the bottom and the working layer and the resulting "anchor hook" effect of the mechanical bonding coating, and spray bonding layer and the substrate is purely metallurgical bonding coating.
Ceramic matrix composites to face problems in the future
Ceramic matrix composites to face problems in the future Now,people have begun to scientific research on the structure,properties and manufacturing techniques of metal ceramic-based composites,but there are many problems that have not yet been studied.Therefore,from this point of view,there is a need for ceramic experts to further study the theoretical issues.On the other hand,the ceramic preparation process is a very complex process,the quality of its many factors,even if an experienced ceramic experts to the formula and process parameters to tell another also experienced ceramic experts,the latter also often can not make this material successfully produced,and the need for a series of tests and adjustments Caixing,so how to further stabilize the ceramic manufacturing process,improve product reliability and consistency,it is to further expand the scope of application of ceramics facing the problem. For more information please link: www.langfengmaterials.com, Please contact us: sales@langfengmaterials.com
Powder coating storage method
Powder coating storage method 1, away from the fire, to avoid direct sunlight,should be placed in a well ventilated,the temperature below 35 ℃ place. 2, to avoid storage in the water, organic solvents, oil and other materials contaminated sites. 3, the carbide powder coating is not allowed to be exposed to the air at any time,should always cover or tighten the bag to avoid debris mixed. 4, to avoid long-term skin contact,attached to the skin of the powder application of soap and water rinse,do not use solvents.The safety of the coating construction site. 5, the use of equipment to wear equipment to be a good grounding to eliminate static electricity. 6, to avoid the phenomenon of endless discharge machine coating. 7, dusting indoor,the concentration of floating dust as far as possible under the control of safe concentrations,to avoid the risk of dust fire explosion. For more information please link: www.langfengmaterials.com,please contact us: sales@langfengmaterials.com
Carbide introduction
Carbide is an excellent tool material, mainly used for cutting tools, metal forming tools, mining tools, surface wear-resistant materials and high-rigidity structural components. Type has tungsten carbide, steel bonded carbide, coated carbide, fine grain cemented carbide. Steel-based cemented carbide is a new type of mold material, the performance between high-speed tool steel and cemented carbide, is one or several carbides (such as WC, TiC) for carbon steel or alloy steel (Such as high-speed tool steel, chromium molybdenum steel, etc.) powder as a binder, by ingredients, pressing, sintering and made of powder metallurgy materials.
Zirconium carbide powder Features
Zirconium carbide, chemical formula ZrC, relative atomic weight 103.22, carbon 11.64%, belongs to the typical NaCl-type face-centered cubic structure, lattice constant 0.46930nm space group Fm3m, C atom and Zr atom radius ratio 0.481, less than 0.59, In the simple interstitial phase, the Zr atom forms a compact cubic lattice and the C atom is in the lattice octahedral gap. The zirconium carbide has a melting point of 3540 ° C, a theoretical density of 6.73 g / cm 3, a coefficient of linear expansion of 7.2 × 10 -6 K-1, a microhardness of 2600 kg / mm 2 and a resistivity of 57-75 / μΩ · cm. 1100 ~ 1400 ℃, insoluble in hydrochloric acid, but soluble in nitric acid.
Hot Spraying Metal Ladder Coating Process
2 thermal spray zinc: the main equipment: compressed air systems, oxygen, acetylene system, metal gas spray gun and hose and other equipment. The principle is: the compressed air in the gun as the driving force, driven by the drive device, the zinc wire through the nozzle, in the oxygen – acetylene flame heating, become a melt, by compressed air to fog into particles and spray to the workpiece , Forming a thermal sprayed zinc protective layer. As the surface of the substrate after blasting uneven  heat shrinkage after the metal coating can be firmly attached to the surface of the workpiece.

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