The preparation method of special-section wire titanium alloy spring belongs to the technical field of spring. The spring is wound by special-section titanium alloy wire; According to the mass percentage, the titanium alloy wire is divided into Al: 2 ~ 4, V: 6 ~ 10, Cr: 4 ~ 8, Mo: 2 ~ 6, Zr: 2 ~ 6, Fe: 0.1 ~ 0.3, Si: 0.03 ~ 0.15; Ti is the margin. The section of titanium alloy spring wire can be rectangular, square, hexagonal or oval. The titanium alloy wire wrapped into the spring is prepared by forging and hot rolling technology. Before the wire wrapped into the spring, the solid solution treatment is required, and the finished spring is strengthened by aging. The use of titanium alloy to prepare the spring can play a role in weight reduction, and titanium alloy has good corrosion resistance and long fatigue life in the Marine environment. The use of special-section wire can increase the cross-sectional area and improve the spring stiffness under similar wire specifications to meet the needs of titanium alloy springs under high working loads.
Spring has been widely used in many fields because of its deformation recovery characteristics. Using the spring element deformation will produce restoring force characteristics, can be used for shock absorption, clamping, energy storage and measurement, according to different uses, mainly compression spring, pull spring and torsion spring. The materials used are mainly metal materials, and the spring prepared by metal materials is the most widely used steel spring, including carbon steel, alloy steel and stainless steel, which has been widely used in aerospace, machinery manufacturing, automobiles, ships and other fields.
At present, with the development and continuous progress of equipment manufacturing technology, the application field of spring is also expanding, and the role of spring components for mechanical equipment is more prominent. At the same time, the selection of spring materials and design parameters are also put forward higher requirements, from the point of view of reducing the weight of the equipment, the weight of the assembled spring components is required to be as light as possible. When the spring is used in the ocean and other corrosive environments, the spring is required to have high corrosion resistance to obtain a stable service life, and the existing steel spring is difficult to meet the above requirements.
Titanium alloy has excellent industrial corrosion resistance and Marine atmosphere, seawater corrosion resistance, its density is 4.5 ~ 4.8g/cm3. Therefore, compared with steel springs, titanium alloy springs have obvious weight reduction and corrosion resistance. However, the shear modulus of titanium alloy is only half that of steel, and the stiffness coefficient of titanium alloy spring is small under the condition of the same structural size. When the wire size is similar, the cross-sectional area of the wire is larger than that of the circular wire, and greater stiffness can be obtained after the spring is wound, which effectively makes up for the shortcomings of the low shear modulus of titanium alloy, improves the allowable load of the spring, and increases the fatigue life of the spring.
