A method for improving the turning workability of high-strength titanium alloy ingots

Abstract

The invention provides a method for improving the turning machinability of a high-strength titanium alloy ingot. The method comprises the following steps: putting the high-strength titanium alloy ingot into a heat treatment furnace for high-temperature heat treatment; then, taking the high-strength titanium alloy ingot subjected to the high-temperature heat treatment out of the heat treatment furnace; carrying out rapid water cooling to 25-150 DEG C; and finally, subjecting the cooled high-strength titanium alloy ingot to turning machining by utilizing a lathe, wherein a tungsten-cobalt hard alloy is adopted as a turning machining tool during the turning machining process. According to the method provided by the invention, a high-temperature heat treatment and rapid cooling combined method is adopted, so that a single-phase alloy structure can be achieved, secondary precipitation phase strengthening can be avoided; and the strength of a material at a certain depth of the ingot surface can be reduced. Accordingly, the difficulty in turning machining of the ingot surface can be greatly reduced and the number of times that the turning machining tool is replaced can be reduced. Meanwhile, the machining efficiency can be improved and the production cycle can be shortened.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy material processing, and in particular relates to a method for improving the turning processability of high-strength titanium alloy ingots. Background technique [0002] The outstanding advantages of titanium, such as high specific strength, corrosion resistance, non-magnetism, low damping, good high and low temperature performance, and good biocompatibility, have been fully explored and applied. It is known as "space metal" and "ocean metal". It is widely used in aerospace, ships, marine engineering, chemical industry, electric power, metallurgy, medical treatment, sports and leisure industries. [0003] Compared with other metals, titanium has the characteristics of strong chemical activity, high melting point, and interstitial impurity content that is extremely sensitive to its performance, so that the melting of titanium and titanium alloy ingots must be carried out under vacuum or iner...

AI Technical Summary

Problems solved by technology

The application of this material tool to process the high-strength titanium alloy strengthened by vacuum slow cooling is very prone to severe wear of the tool or chipping when turning does not move, the processing efficiency is low, and the production cycle is affected

Although the quality of the current ceramic tools has been improved, and more and more are used to process difficult-to-cut materials, especially high-temperature alloys (such as nickel-based superalloys) used in aero-engines, but due to their poor thermal conductivity and fracture toughness Low and reacts with titanium, so it is less used in the field of titanium alloy cutting

Superhard cutting tool materials (cubic boron nitride and polycrystalline diamond), which have a low wear rate when cutting titanium alloys, perform better than carbide knives, and show good performance, but they are very expensive