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3D Printing、MIM、HIP、Brazing、Spraying、Porous material、PM
Nickel-based brazing filler metal is a brazing material composed of nickel as the base matrix, combined with low-melting elements such as boron, silicon, and phosphorus, as well as strengthening elements like chromium, cobalt, molybdenum, tungsten, and iron.
Copper-based brazing alloys refer to a class of brazing filler materials whose primary base element is copper (Cu). Brazing is a joining process in which the filler metal—whose melting point is lower than that of the base materials (the workpieces to be joined)—is heated until it melts. The molten filler then wets the base materials, fills the gaps at the joint, and, through mutual dissolution and diffusion with the base materials, achieves a strong, durable bond between the workpieces.
Silver-based brazing filler metal is a brazing material whose primary component is silver (Ag). It is typically available in the form of wires, sheets, strips, or powders.
BNi-2 is one of the most widely used nickel-based brazing alloys, characterized by a low melting temperature, good wettability, and fluidity. During the brazing process, the base material grains do not grow, which helps prevent deterioration of component performance.
1. High-Temperature and Corrosion Resistance Temperature range: -200°C to 1000°C, oxidation and sulfidation corrosion resistance. Resistant to seawater, chlorides, and acidic media corrosion, suitable for marine and chemical environments. 2. Excellent Processability High sphericity (≥98%), low oxygen content (≤0.1%), good fluidity, reducing 3D printing defects. Strong bonding strength with the substrate, supporting the formation of high-precision complex structures. 3. High Strength and Toughness Room temperature tensile strength ≥900 MPa, maintaining excellent mechanical properties at high temperatures.
1. High-Temperature Performance Applicable temperature range: -250°C to 700°C, resistant to high-temperature oxidation, creep, and sulfide corrosion. Strength is significantly improved after age hardening (room temperature tensile strength ≥ 1300 MPa). 2. Corrosion Resistance Resistant to acids, alkalis, chlorides, and seawater corrosion, suitable for chemical, marine, and nuclear industries. 3. Process Compatibility High sphericity (≥97%), low oxygen content (≤0.1%), excellent fluidity, compatible with additive manufacturing processes such as SLM (Selective Laser Melting) and EBM (Electron Beam Melting). No tendency for cracking after welding, supports the precision forming of complex structures.
1. Physical Properties: White or pale yellow powder, density ~4.6 g/cm³, melting point approximately 1485°C, insoluble in water. 2. Chemical Stability: Acid-resistant, high-temperature oxidation-resistant, slowly dissolves in strong alkalis. 3. Functional Characteristics: High dielectric constant (ε≈40), suitable for electronic ceramics. Excellent photocatalytic activity, can be used to degrade pollutants. Semiconductor properties (band gap ~3.4 eV), suitable for optoelectronic materials. 4. Controllable Morphology: Micrometer to nanometer powders are available, supporting customized morphologies such as spherical and flake-like shapes.
1. High strength and toughness: The weld is dense, with high tensile strength and impact resistance. 2. Corrosion resistance: It has good resistance to acids, alkalis, and high-temperature oxidation environments. 3. Low melting point: Brazing temperature range 780~850℃ (adjustable), suitable for a variety of substrates. 4. Good fluidity: Strong wettability, uniform weld filling, and low porosity.
1. Low melting point: brazing temperature range 620~750℃, energy-efficient and highly effective. 2. Strong wettability: good fluidity, can fill complex welds, and ensure firm bonding. 3. Corrosion resistance: resistant to water vapor and weak acid-base environments, extending the service life of workpieces. 4. Economic efficiency: moderate silver content, high cost performance, suitable for mass production.
Adding elements such as manganese, nickel, and cobalt to copper-zinc brazing filler metal can improve wettability and significantly increase the strength of the brazed joint. When Mn is added, the tensile strength of joints brazed with YG8, YT5, YT15, and other cemented carbides can reach 300-320 MPa at room temperature. At 320°C, it still maintains 220-240 MPa. The addition of nickel can further enhance the wettability of the filler metal to cemented carbides, resulting in better brazing microstructure and performance, and improving the impact toughness and fatigue impact strength of cemented carbide tools.
1. Self-fluxing function: Phosphorus generates phosphate during brazing, reducing oxidation and eliminating the need for additional flux. 2. Low melting point and easy operation: Solidus temperature is approximately 645℃, liquidus temperature is approximately 815℃, suitable for heat-sensitive workpieces. 3. High conductivity: The conductivity of the brazed joint is close to that of pure copper, ensuring reliable electrical connection. 4. Excellent wettability: It wets copper, brass and other base materials thoroughly, resulting in a dense, pore-free weld.
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