Technical Topics-第10页-Changsha Langfeng Metallic Material Co., Ltd.

Plasma spraying
Plasma spraying As the plasma spray can spray almost a variety of materials, and the process is simple, good combination of coating and matrix, it has been widely used. However, the control of a large number of parameters related to the spraying process is more complicated and becomes the main obstacle to the high quality coating of plasma spraying. One of the main aspects of the past study was to improve the performance of the gun, including the ablation of the electrode and the study of the instability of the plasma jet caused by hydrodynamic performance and arc performance. Now, by analyzing the model of the turbulent plasma jet, the jet is considered to be a two-fluid system composed of two parts of the fluid with the opposite direction of motion. As the experimental observation of the plasma jet has a wave phenomenon, so the plasma jet temperature field and velocity field distribution of experimental data and theoretical analysis of the comparison there are some difficulties.  The other direction of the current study is to study the formation of coating process, including the coating between the combination of coating and matrix bonding, porosity and non-melting particles control. The ultimate...
Arc spraying
Arc spraying Arc spraying is an economical and reliable thermal spraying process. Spraying materials are generally limited to metals and alloys and can be sprayed against a wide range of substrates. Applications include wear-resistant coating, structural anti-corrosion coating and wear parts repair, the future may also be applied to the field of sealing. Now the main aspect of the study of arc spraying is the research and development of tubular metal powder core. The current research work is focused on how to automate the spraying process. For more information please link: www.langfengmaterials.com,please contact us: sales@langfengmaterials.com
Tile cutter wheel characteristics
Tile cutter wheel for a variety of glazed tiles, anti-skid tiles, hard polished tiles, wall tiles, glass and other linear cutting and angle cutting. Products are straight, high wear-resistant, not collapse edge, not afraid of heavy mouth, bearing products can be evenly under the pressure in the center of gravity to reduce friction, so that product life. Products can be cut 2-20mm thick tiles, use up to 20000M. Is the best cutting tool edge.
Surface Treatment Engineering and Thermal Spray Technology Features and Development
Thermal spraying technology is an important branch in surface engineering. It heats some linear and powdery materials to melting or semi-melting state by heat source such as flame, arc or plasma, Jet to the substrate to form a coating. The coating is resistant to abrasion, corrosion, high temperature and thermal insulation, and offers the ability to repair parts that are subject to wear, corrosion, or process tolerances. The application of thermal spraying technology mainly includes: long-term preservation, mechanical repair and advanced manufacturing technology, mold making and repairing, manufacturing special functional coating and other four aspects. At present, thermal spraying technology has been widely used in almost all industrial areas and household products (such as non-stick pan, infrared health care heater, etc.).
Powder metallurgy overall shortcomings
Powder metallurgy overall shortcomings: 1) There is always porosity inside the product; 2) the strength of ordinary powder metallurgy products than the corresponding forging or casting to low (about 20% to 30%); 3) due to the process of forming the powder flow is far less than liquid metal, so the shape of the product structure has some restrictions; 4) the pressure required for press forming is high, so that the product is limited by the capacity of the pressing equipment; 5) High cost of molding, generally only for batch or mass production. Metal powder: the quality of the final product is difficult to control freely; metal powder expensive; powder is not obedient to the law of hydraulics, leaving the product structure shape has certain restrictions. Manufacturing equipment, methods: 1) Press: often need to use expensive powerful press 2) Die: a consumable, the higher the cost 3) Sintering furnace 4) powder easy to oxidation, mixing takes a long time 5) The size and shape of the product are limited. For more information please link: www.langfengmaterials.com, Please contact us: sales@langfengmaterials.com
Mechanical descaling and chemical pickling two methods
Mechanical descaling and chemical pickling two methods Shelling descaling cold heading steel strip removal of iron oxide plate process stripping light, descaling, mechanical descaling and chemical pickling two methods. Mechanical descaling wire rod to replace the chemical pickling process, both to improve productivity, but also reduce environmental pollution. This descaling process, including bending method (commonly used round groove with triangular groove repeatedly curved rod), such as nine spray method, descaling better, but can not make the residual iron scale to clean (iron oxide scale removal rate was 97% ), Especially in the case of strong scale adherence, mechanical scale removal is subject to the use of carbon steel wire rod for low-strength fasteners (grade 6.8 or less) due to the influence of the thickness, the structure and the stress state of the scale. High-strength fasteners (greater than or equal to 8.8) with wire rod in the mechanical descaling, in addition to net all the iron oxide skin, and then through the chemical pickling process composite descaling. For low carbon steel wire rod, the mechanical descaling residual iron easily lead to uneven wear die grading. When the die hole pull due to the wire rod friction outer temperature when the metal...

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