Technical Topics-第14页-Changsha Langfeng Metallic Material Co., Ltd.

Crushing hammer special pouring titanium alloy rod
TiC high manganese steel bonded carbide, including TM52, TM60, etc., has good toughness and wear resistance, can be used arc welding, casting and other means of connection with other materials, suitable for the production of impact tools, crusher hammer and Ball mill liner and other wear-resistant anti-impact parts.
Heat treatment of high manganese steel castings
Heat treatment of high manganese steel castings In addition to the austenite phase, the as-cast microstructure of high-manganese steel also has precipitated carbides. In order to obtain high toughness, heat treatment must be performed to remove carbides in the grain and on the grain boundaries in the as-cast structure. The carbon content of high manganese steel is usually about 13%. To remove the carbides in its as-cast structure, the steel needs to be heated to 1,000. C, and keep it for a proper time to completely dissolve the carbide, and then quickly cool it. This heat treatment is usually called water toughening treatment. (1) Water toughness temperature The water toughness temperature depends on the composition of the cast steel and is usually 1050 to 1080 C. Excessive water toughness temperature will cause severe decarburization on the surface of the casting, and austenite grains will precipitate precipitation of eutectic carbides on the grain boundaries. Since eutectic carbides are brittle phases that cannot be reheated to eliminate them, they should be avoided as much as possible. (2) Heating rate High-manganese steel has lower thermal conductivity than ordinary carbon steel castings, and the castings are likely to cause stress when heating; thick-walled castings...
Particle Size of Titanium Carbide Powder and its Application
3: titanium carbide powder used in high temperature thermal spraying materials, mainly with the following commonly used particle size: 40-60 mesh (250-380 microns), 60-80 mesh (180-250 microns), 80-100 mesh (150- 100 to 150 mesh, 150 to 200 mesh (75 to 106 microns), 200 to 400 mesh (38 to 75 microns), 200 to 325 mesh (45 to 75 microns) (-45 microns), -400 mesh (-38 microns)
Titanium carbonitride TiCN powder
Because titanium carbonitride TiCN powder having overall performance of TiC and TiN, its hardness higher than TiC and TiN, has a high melting point, high hardness, wear resistance, oxidation resistance, corrosion resistance and other characteristics, and good thermal conductivity, electrical conductivity and chemical stability, and therefore is an ideal tool coating material. Titanium carbonitride coating can improve the bonding strength with the substrate, while having the overall performance of a variety of materials.
Spray zinc, spray aluminum technology and similar performance comparison (hot-dip galvanizing process)
Spray zinc, spray aluminum technology and similar performance comparison (hot-dip galvanizing process) 1, hot-dip galvanizing process pretreatment using pickling, phosphating process, the surface of the workpiece will be acid, lye residue, leaving a hidden risk of corrosion, so that hot galvanized layer prone to fall off. Sprayed zinc, sprayed aluminum pretreatment using sandblasting process, so the workpiece surface is very clean and rough, the surface sprayed zinc, sprayed aluminum will not produce corrosion from the inside out, which will not produce zinc layer off phenomenon. 2, hot-dip galvanizing process has a certain temperature, about 440 ℃ or so, so the workpiece will be deformed after hot-dip; and spray zinc, spray aluminum spray when the temperature is very low, the workpiece surface temperature <80 ℃, so the workpiece is not deformed. 3, the use of hot-dip galvanizing process, the workpiece by the plating tank length × width × height limit; and the use of spray zinc, spray aluminum process is no restrictions on the workpiece. 4, the use of hot-dip galvanizing process, there are still on-site repair problems. Site installation of the weld, handling, transport process damage, repair can only use paint, resulting in a breakthrough process. Such as the use...
Briefly Similarity and Personality of Tantalum and niobium
Briefly Similarity and Personality of Tantalum and niobium Tantalum and niobium are the same family of elements,the outermost electrons are the same,and the chemical activity is basically the same.Tantalum and niobium are the core structure,lattice constant is close to their thermal conductivity,linear expansion coefficient are also very close. In addition,at any temperature or at a temperature of 100 ° C to 150 ° C, hydrochloric acid,sulfuric acid,nitric acid,phosphoric acid and organic acids can not attack tantalum and niobium at any concentration.In the aqua regia due to the formation of protective oxide film,it also has corrosion resistance.But tantalum and niobium are soluble in hydrofluoric acid solution. For more information please link: www.langfengmaterials.com,please contact us: sales@langfengmaterials.com

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