Method for identifying counterfeit products by titanium rods

Titanium alloy TC4 has a higher specific strength and is stronger than ultra-high-strength steel. Titanium has a high chemical activity. Above 600°C, titanium absorbs oxygen and forms a hardened layer with high hardness. The thermal conductivity of titanium is low, about 1/5 of that of iron and 1/14 of that of aluminum. The modulus of elasticity of titanium is small, about 1/2 of that of steel. Because of the special properties of titanium alloy processing, there are mainly the following difficulties in processing:

(1) The cutting deformation coefficient of titanium alloy is close to 1, so the sliding friction distance of chips on the rake face is greatly increased, which accelerates tool wear.

(2) The thermal conductivity is low and the cutting temperature is high. Under the same conditions, TC4 is more than twice as high as 45 steel.

(3) Due to the short contact length between the tool and the chip, the cutting force per unit contact area is greatly increased, and it is easy to chip.

(4) The chemical activity is large, and it is easy to produce a surface metamorphic pollution layer, which makes the organization uneven, severely damages the tool, and produces chipping, chipping, and peeling.

(5) Due to the high affinity of titanium alloy and high cutting temperature, the sticking phenomenon during cutting is serious, which will cause bonding wear during the cutting process. Therefore, chipping, chip breaking and chip removal will occur in the process of titanium alloy thin-walled titanium machining parts, so it is more difficult to prevent the distortion of the machined parts.

Titanium alloy has poor cutting performance and is one of the typical difficult-to-machine materials. This requires us to combine theory with practice in work, accumulate processing experience in actual work, and formulate practical titanium alloy processing and construction technology plans for problems. The equipment, tools, fixtures, cutting parameters and other process methods of titanium alloy processing parts of this type of material parts are summarized and demonstrated, in order to better guide the processing and application of titanium alloys in practice. It is hoped that this article can be useful in the manufacturing industry. My colleagues were helpful and inspired.
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