Introduction to Titanium Screw Processing Technology!

The mainstream process of titanium screws is divided into two routes: large-scale cold/warm forging mass production and small-scale CNC precision turning. Commonly used raw materials include TA2 pure titanium and TC4 (Ti-6Al-4V) titanium alloy, which are respectively used for anti-corrosion general parts and aviation/high-strength fasteners. The overall process flow is: raw material preparation → blank shaping → rod precision machining → thread processing → heat treatment → surface treatment → full inspection and storage.

Head molding (two major molding processes)

1. Cold heading/warm heading (preferred for large quantities of standard screws, with low cost and a yield rate of 95%+)

Pure Titanium TA2: Cold heading at room temperature, multi station cold heading machine is used to extrude the inner hexagon, disc head, and outer hexagon in stages, with a single deformation of less than 30%, to prevent cracking of the R corner under the head. A special titanium material lubricant anti sticking mold for molybdenum disulfide is used.

TC4 titanium alloy: It must be preheated at 300-750 ℃ during cold heading. The plasticity of α+β titanium at room temperature is poor, and direct cold heading is prone to fracture and cracking; Segmented forging is used to form the head and rounded corners under the head, and the mold is made of YG15 hard alloy material.

2. CNC turning forming (non-standard, micro, and irregular screws)

M0.8 micro precision screws, non-standard irregular heads (plum blossom, twelve corner, eccentric center), large diameter>M30 bolts, using a lathe/CNC lathe, directly turning the head shape and rounded corners, with dimensional accuracy IT6~IT7, tolerance ± 0.01~0.02mm, and material utilization rate 25%~40% lower.