To meet the dynamic challenges of our customers, NTK Thermal Division of NTK group utilizes a wide range of technologies to address the thermal management needs across all industries. Decades of experience in air and liquid cooling make NTK thermal Solution the world leader in designing, testing, and fabricating cooling solutions for the most demanding and cutting edge products. With such a high level of expertise, NTK is uniquely qualified to help you select the right technology for your application.
Each technology can be utilized as either passive or active cooling solutions depending upon product and customer requirements. Learn more about each of the technologies below, or contact NTK for assistance in selecting the right technology for your solution.
Vacuum brazing is a manufacturing process for joining components that allows for higher thermal performance and lighter solutions. Braze alloys have a lower melting temperature than the materials that they are joining. Prior to the heating process, the braze alloy is applied between close fitting components of the parent alloy that are fixtured into place. The parts are placed in a vacuum furnace that is heated to at least 450°C, a level that will melt the braze alloy but not the main material. As the furnace is a vacuum environment, there is no risk of oxidation and no need for flux. The molten braze alloy fills in gaps between the components through capillary action so that when the part is cooled, it forms a joint through atomic attraction and diffusion. The end result is a clean, one-piece construction with strong joints.
Friction stir welding (FSW) refers to the use of heat generated by friction between high-speed rotating welding tool and workpiece to locally plasticize the welded material. When the welding tool moves forward along the welding interface, the plasticized material flows from the front part of the welding tool to the rear part under the rotating friction force of the welding tool, and forms a compact solid-phase weld under the extrusion of the welding tool.
The main advantages of friction stir welding are as follows:
(1) The micro structures in HAZ of welded joints change little, the residual stress is relatively low, and the welded workpiece is not easy to deform.
(2) Can complete the welding of long seam, large cross-section and different positions at one time. Joint height:
(3) The operation process is convenient to realize mechanization and automation, the equipment is simple, the energy consumption is low, the efficiency is high, and the requirement for the working environment is low.
(4) There is no need to add welding wire, no need to remove oxide film before welding, no need to protect gas, and low cost.
(5) Weldable hot crack sensitive material, suitable for welding dissimilar materials:
(6) The welding process is safe, pollution-free, smokeless and radiation-free.
The castings produced by die casting are called die castings. The tensile strength of these materials is nearly twice as high as that of ordinary casting alloys, which is of more positive significance for the parts of aluminum alloy, such as automobile wheels, frame and other components that hope to be produced with higher strength impact resistant materials.
Forging is a kind of processing method that uses forging machinery to exert pressure on metal blanks to produce plastic deformation to obtain forgings with certain mechanical properties, shape and size. Forging (forging and stamping) is one of the two major components. Forging can eliminate the defects such as as as as-cast looseness and optimize the micro-structure of metals in the smelting process. At the same time, the mechanical properties of forgings are generally better than those of castings of the same material because of the preservation of complete metal streamlines. Forgings are often used for important parts with high load and severe working conditions in related machinery, except for simple rolled plates, profiles or weldments.
Stamping is a method of forming and processing workpiece (stamping piece) with required shape and size by applying external force to sheet, strip, pipe and profile by press and die to produce plastic deformation or separation. Stamping and forging belong to plastic processing (or pressure machining). The stamping blanks are mainly hot rolled and cold-rolled steel plates and steel strips. 60 to 70% of the steel products in the world are sheets, most of which are stamped into finished products. The car body, chassis, fuel tank, radiator fin, boiler drum, container shell, electrical machinery, electrical core silicon steel sheet, etc. are stamped.
Aluminum extrusion is a plastic processing method for parts or semi-finished products which are placed in the die cavity (or extrusion cylinder) under strong pressure, forcing the metal blank to produce directional plastic deformation and extruding from the die hole of the extrusion die, so as to obtain the required cross-section shape, size and certain mechanical properties.
1. Improve the deformability of aluminium.
2. The comprehensive quality of products is high.
3. Wide range of products.
4. Flexibility of production.
3. Wide range of products.
4. Flexibility of production.
Tin soldering is a kind of welding method that uses low melting point metal solder to heat and melt, then infiltrates and fills the gap between the joints of metal parts.
A metal surface treatment process, it refers to a kind of material protection technology that metal material forms oxide film on its surface by applying anodic current in electrolyte solution. It is also called surface anodic oxidation.
Electroplating is the process of plating a thin layer of other metals or alloys on some metal surfaces by electrolysis principle. It is a process of making metal or other materials adhere to a metal film by electrolysis, which can prevent metal oxidation (such as rust), improve wear resistance, electrical conductivity, reflectivity, corrosion resistance (copper sulfate, etc.) and improve aesthetics.
Screen printing is the process of making screen printing plate by stretching silk fabrics, synthetic fabrics or metal screen onto the screen frame and using hand-engraved paint film or photochemical plate-making method. Modern screen printing technology uses photosensitive materials to make screen printing plates by photographic plate making method.