Technical Topics-第4页-Changsha Langfeng Metallic Material Co., Ltd.

Work Hardening and Mechanism of High Manganese Steel（三）
By adding TiC-based cemented carbide, can form a high hardness of the second phase of the particle,is to improve the high manganese steel wear resistance of one of the main reasons.The formation of the dispersion matrix on the austenite matrix of the second phase of hard spots and solid solution in the austenite matrix to form a Cobo group to prevent dislocation movement,improve the hardening capacity,increase wear resistance. For more information please link: www.langfengmaterials.com,please contact us: sales@langfengmaterials.com
Cold forging usually
Forming the head of the bolt adopts cold heading plastic processing. Compared with cutting, the metal fiber (metal wire) is continuous along the shape of the product with no cutting in the middle, thus improving the product strength, especially the excellent mechanical property. Cold heading forming process includes cutting and forming, single-click single-click, double-cold heading and multi-station automatic cold heading. An automatic cold heading machine in several forming die in the stamping, upsetting, extrusion and shrinkage and other multi-station technology. The processing characteristics of the original blanks used in single-station or multi-station automatic cold heading are determined by the bar size of 5-6 meters in material size or the wire diameter of 1900-2000KG, that is, the characteristics of the processing technology Rather than using a pre-cut single piece of stock for cold upsetting, the blank is cut and upset (if necessary) from an automatic cold heading machine itself by bar and wire rod. The blank must be reshaped before the cavity is squeezed. Through plastic surgery can be obtained in line with the requirements of the rough. Before upsetting, shrinking and being squeezed, the blank does not need to be reshaped. Blank cut off, sent to upsetting shaping station. The...
TiC TaC sintered carbide tools
Sintered carbides consist of fine, hard, wear-resistant carbides,like tungsten carbide, titanium carbide, tantalum carbide, either singly or in combination, bonded together by a relatively soft metallic binder such as cobalt or nickel. According to the type and the amount of carbides and binders used, sintered carbides exhibit a wide range of properties from extreme hardness to very tough grades. These grades have their own applications.
Modern Powder Metallurgy Technology
Modern powder metallurgy technology has become the most important preparation method of non-equilibrium materials. The use of these technologies not only can significantly improve the performance of traditional materials, but also the development of new materials. The ultra-fine powders were prepared by evaporative condensation method, and the amorphous, quasicrystal and microcrystalline materials were prepared by rapid condensation technique. The nanocrystalline materials were prepared by mechanical alloying. The ultrahigh pressure or ultra-high temperature Synthetic powder metallurgy products with special properties, the use of special forming and special sintering method to maintain the material in the metastable phase and the preparation of non-equilibrium materials.
Spray powders occupy a very important position
Spray powders occupy a very important position in the entire thermal spray material. Thermal spray powder alloys include nickel-based, iron-based and cobalt-based alloy powder, according to the hardness of different coatings were applied to mechanical parts repair and protection. Thermal spray technology after years of development, China has formed a complete system of research and production equipment, currently engaged in this work have more than 20 units, capable of producing all types of oxyacetylene flame spraying equipment, spray melting equipment, arc spraying equipment, complete sets of equipment, plasma spraying, spray equipment, supporting a variety of special equipment.
Highlight the advantages of vacuum heat treatment technology tool
The tool has a series of outstanding vacuum heat treatment technology advantages: vacuum heat treatment has antioxidant effect. Surface is not oxidized, not decarbonization, and reducing rust effect, save the tool roughing process, saving expensive tool steel raw material consumption, save processing time and reduce product cost; The vacuum heat treatment with vacuum degassing °reasing effect, There is no risk of hydrogen embrittlement. Prevent the tool from the surface of the refractory metal material is brittle, make the surface of the tool increase the purity of the material and improve tool fatigue strength, ductility and toughness and corrosion resistance, improved tool life. Vacuum carbide powder heat treatment has little deformation hardening, can reduce stress deposit of conventional quenching distortion correction, Reduce the possibility of the blade breaking during use, Vacuum heat treatment deformation of blade for salt bath quenching 1 / 2-1 / 10, after quenching generally do not need correction can be grinding processing to finished. Vacuum heat treatment process stability and good reproducibility. Once the process is determined,as long as the input process procedures, heat treatment operations will run automatically. Avoid instability caused by conventional heat treatment process caused by tool quality fluctuations. Vacuum heat treatment less power consumption,...

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