Titaniumalloy products (marketing department of Shanghai HY Industry Co., Ltd)
Titanium alloy refers to a variety of alloy metals made of titanium and other metals, with high strength, good corrosion resistance and high heat resistance. Titanium alloys are widely used in the manufacture of aircraft engine compressor components, skeletons, skins, fasteners and landing gear. Titanium alloys are also used in structural parts of rockets, missiles and high-speed aircraft.
Titanium is an allotrope with a melting point of 1668 °C. When it is lower than 882 °C, it has a close-packed hexagonal lattice structure, which is called α titanium; when it is above 882 °C, it has a body-centered cubic lattice structure, which is called β titanium. Using the different characteristics of the above two structures of titanium, adding appropriate alloying elements to obtain titanium alloys with different structures. At room temperature, titanium alloys have three matrix structures, and titanium alloys are divided into the following three categories: α alloys, (α+β) alloys and β alloys. my country is represented by TA, TC and TB respectively.
The density of titanium alloys is generally around 4.51g/cm3, which is only 60% of steel. Some high-strength titanium alloys exceed the strength of many alloy structures, so the specific strength (strength/density) of titanium alloys is much greater than that of other metal structural materials. , can produce parts with high unit strength, good rigidity and light weight.
Titanium is non-toxic, light in weight, high in strength and has excellent biocompatibility. It is an ideal medical metal material and can be used as implants in the human body. In the United States, five β-titanium alloys have been recommended to the medical field, namely TMZFTM (TI-12Mo-^Zr-2Fe), Ti-13Nb-13Zr, Timetal 21SRx (TI-15Mo-2.5Nb-0.2Si), Tiadyne 1610 (Ti-16Nb-9.5Hf) and Ti-15Mo, suitable for implantation into the human body, such as artificial bones, vascular stents, etc.
The biocompatibility of TiNi alloys is very good, and there are quite a few medical examples of utilizing its shape memory effect and superelasticity. Such as thrombus filters, spinal rods, orthodontic wires, vascular stents, bone plates, intramedullary needles, artificial joints, contraceptives, heart repair components, micro-pumps for artificial kidneys, etc.
Titanium alloy products can be obtained by die casting and machining methods. The melting temperature of titanium alloy is very high, and the requirements for mold steel are also high. There are many methods of machining titanium alloys, including: turning, milling, boring, drilling, grinding, tapping, sawing, EDM, etc.
The machinability of titanium alloys is also poor. The cutting force of titanium alloy is only slightly higher than that of steel with the same hardness, but the thermal conductivity of most titanium alloys is very low, only 1/7 of steel and 1/16 of aluminum, so the heat generated by cutting will not dissipate quickly. , gather in the cutting area, causing the tool edge to wear rapidly, collapse and generate built-up edge.