How to ensure a strong connection between titanium and other components when manufacturing a multifunctional constant temperature titanium pot?
Release Time : 2026-01-12
In the manufacturing process of a multifunctional constant-temperature titanium pot, ensuring the strong connection between titanium and other components is crucial for guaranteeing the overall performance, lifespan, and safety of the cookware. Titanium, due to its high strength, low density, and excellent corrosion resistance, is widely used in high-end cookware; however, its unique physicochemical properties place higher demands on the joining process. A comprehensive approach is needed, encompassing material selection, structural design, process control, surface treatment, quality inspection, environmental adaptability, and long-term maintenance, to achieve a reliable connection between titanium and other components.
Material selection is fundamental to ensuring a strong connection. Joining titanium with other metals (such as stainless steel and aluminum alloys) or non-metals (such as ceramics and composite materials) requires consideration of thermal expansion coefficients, elastic modulus, and chemical compatibility. For example, direct welding of titanium to stainless steel is prone to cracking due to differences in thermal expansion; therefore, adding a transition layer material (such as niobium or tantalum) or using a composite structure is necessary to reduce stress concentration. Simultaneously, the surfaces of components must be rigorously cleaned to remove oil, oxide layers, and other impurities to prevent interface contamination from reducing connection strength.
Structural design must balance mechanical performance with manufacturing feasibility. The temperature-regulating function of a multifunctional constant-temperature titanium pot typically relies on a bottom composite heat-conducting layer (such as aluminum alloy) to achieve rapid and even heating. The connection between titanium and aluminum alloy requires processes such as explosive bonding, rolling bonding, or brazing. The design must optimize the geometry of the connection area, such as using a gradual transition structure to reduce stress abrupt changes, or increasing the connection area to distribute the load. Furthermore, the connection between the pot body and components such as the handle and lid must consider frequent opening and closing, and load-bearing scenarios; using embedded structures or reinforcing rib designs can significantly improve connection reliability.
Process control is crucial to ensuring connection quality. Taking welding as an example, titanium readily reacts with elements such as oxygen, nitrogen, and hydrogen at high temperatures, forming a brittle oxide layer or hydrides, leading to deterioration of weld performance. Therefore, welding must be performed under inert gas (such as argon) protection, and welding parameters (such as current, voltage, and speed) must be strictly controlled to avoid overheating. For brazing, a brazing filler metal compatible with titanium and the materials being joined (such as silver-based or titanium-based filler metals) must be selected, and the heating temperature and holding time must be precisely controlled to ensure that the filler metal fully fills the gaps and forms a dense bonding layer. Surface treatment significantly improves connection strength and durability. While the naturally formed oxide film on titanium improves corrosion resistance, it reduces weldability. Therefore, before welding, the oxide film must be removed through mechanical grinding, chemical etching, or plasma cleaning, and annealing should be performed after welding to eliminate residual stress. For non-welded connections (such as riveting and threaded connections), surface treatment can enhance the coefficient of friction or corrosion resistance. For example, anodizing titanium bolts improves wear resistance and prevents electrochemical corrosion.
Quality inspection is the last line of defense for ensuring connection reliability. Non-destructive testing techniques (such as X-ray inspection and ultrasonic testing) must be used to inspect internal weld defects, such as porosity, cracks, or lack of fusion. Tensile and shear tests should be conducted to verify that the mechanical properties of the connection meet standards. Thermal conductivity tests should be performed on composite structures to ensure that the constant temperature function is not affected by connection defects. In addition, environmental adaptability tests such as salt spray tests and high-temperature and high-humidity tests can verify the stability of the connection during long-term use.
Environmental adaptability design must consider the actual use scenarios of the multifunctional constant temperature titanium pot. For example, multifunctional constant-temperature titanium pots used for outdoor camping may face extreme temperatures, vibrations, or impacts, requiring optimized connection structures (such as adding anti-loosening devices) or the use of high-toughness materials to improve impact resistance. For models compatible with induction cooktops, it's crucial to ensure the connection between the titanium and the composite substrate does not affect electromagnetic induction efficiency, preventing connection failure due to localized overheating.
Long-term maintenance and proper usage are equally important. Users should avoid scratching connection areas with sharp tools to prevent damage to the surface coating or oxide layer, which could lead to corrosion; avoid using strong acid or alkali cleaners during cleaning to prevent accelerating the aging of connection materials; regularly check the tightness of detachable parts such as handles and lids, and replace worn parts promptly. Manufacturers must clearly specify usage restrictions and maintenance methods in the product manual to extend the cookware's lifespan.