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3D Printing

3D printing technology is a type of rapid prototyping technology, also known as additive manufacturing. It is a technology that is based on digital model files and uses adhesive materials such as powdered metal to construct objects by printing layer by layer. It takes into account the rapid manufacturing of complex shapes and high-performance metal parts, creating an important technical approach for the rapid development and innovative design of new products, thereby achieving lightweight, high-performance and low-cost product structures. Metal 3D printing can be directly used for functional structural parts of aviation and aerospace , and can be used for structural verification, functional testing, batch direct application, etc. It can be shaped and manufactured according to the user's design requirements. Aerospace, automotive, precision instruments and other fields. Meanwhile, metal 3D printing can also be used for high-performance repair and re-manufacturing of metal parts to achieve full-life manufacturing and guarantee of high-performance metal parts.

Spraying

Spraying is a coating method that uses a spray gun or a disc atomizer to disperse the spray into uniform and fine droplets with the help of pressure or centrifugal force, and then applies it to the surface of the object to be coated. Common spraying processes include oxygen acetylene flame spraying, hyper-sonic flame spraying (HVOF), plasma spraying, cold spraying, etc. Spraying alloy powders mainly include nickel-based, iron-based and cobalt-based alloy powders, elemental metal powders, metal carbide powders, etc. Depending on the hardness of the coating, it is widely used for the repair and protection of mechanical parts. Powder spraying plays a very important role in the entire thermal spray material. Different coating materials can be selected according to needs to make the substrate obtain one or more properties such as wear resistance, corrosion resistance, oxidation resistance, high temperature resistance, and radiation resistance.

Laser Cladding

Laser cladding is a surface additive manufacturing and restoring technology widely used in mechanical components restoration. The laser light targeted at the substrate melts and deposits metal powder covering onto the substrate surface, thus forming a dense high-performance cladding layer to improve the surface performance of the metal parts with better corrosion resistance and wear resistance, to achieve the purpose of surface modification or restoration while saving huge material cost and meeting the specific performance requirements of the material surface. Compared with surfacing welding, spraying and gas deposition, laser cladding has the characteristics of low dilution, high density, good bonding effect between coating and substrate, many suitable cladding material choices, and more tolerance in particle size and content changes.

MIM

Metal injection molding (MIM) is a new powder metallurgy near-net shape technology derived from the plastic injection molding industry. The basic process steps of metal injection molding are: first select metal powder and adhesive that meet MIM requirements, then use right ways to mix the powder and adhesive at a certain temperature into a uniform feed, then granulate, After injection molding, the resulting molded body is degreased and then sintered and densified to become the final product. It has the characteristics of high precision, uniform structure, excellent performance and low production cost. Its products are widely used in industrial fields such as electronic information engineering, biomedical equipment, office equipment, automobiles, hardware, sports equipment, watch industry, weapons and aerospace. The particle size of metal powder used in the MIM process is generally 0.5~20μm; theoretically, the finer the particles, the larger the specific surface area, making it easier to shape and sinter.

HIP

Hot Isostatic Pressing (HIP) refers to the process of applying isostatic pressure to powder or powder tablets at high temperatures, combining powder sintering and isostatic pressing into one process. The biggest advantage of HIP is that under the action of high temperature and high pressure, the pressed material has good viscous flow. Since it is pressed evenly in all directions, it can be operated at lower temperatures .generally 50% of the melting point of the material to 70%. and under lower pressure, products with fine particles, excellent micro-structure, close to the theoretical density, and excellent performance can be obtained. HIP has become an advanced process in modern powder metallurgy technology for producing large-scale complex shape products and high-performance materials, and has been widely used in cemented carbide, ceramics, powder metallurgy super-alloy materials, powder metallurgy high-speed steel, powder metallurgy stainless steel, and powder titanium alloys. Molding and sintering, etc.

Brazing

Brazing is an important method to complete the connection of materials. It uses a filler metal with a lower melting point than the weldment to be heated together with the weldment to melt the filler metal without melting the welding body. After the filler metal melts, capillary action is used to make the liquid solder. The filler material moistens and fills the gaps at the base metal joints, forming fiber seams through the interaction between the base metal and the brazing material, and then cools and solidifies, thereby forming a metallurgical bonding method. During brazing, the heating temperature of the weldment is low, the structure and mechanical properties of the weldment change little, the deformation is small, the joint is flat and smooth, the process is simple, and the productivity is high, so brazing has been widely application.

Powder metallurgy (PM) is an industrial technology that uses metal powder or metal powder (or a mixture of metal powder and non-metal powder) as raw materials to prepare metal materials, composite materials and various products through shaping and sintering. Powder metallurgy technology has been widely used in transportation, machinery, electronics, aerospace, weapons, biology, new energy, information and nuclear industries. Powder metallurgy technology has obvious characteristics of energy saving, material saving, excellent performance, high product precision and good stability. It has a series of advantages and is very suitable for mass production. The powder metallurgy products industry includes iron and stone tools, cemented carbide, magnetic materials and various powder metallurgy products.

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