Structural Titanium Metal Stamping Bending Parts

Metallographic specimens of titanium and titanium alloys are more difficult to prepare than steel, and their polishing and polishing efficiency is low. Excessive cutting and polishing processes will produce deformation twins in the alpha phase. The microstructure analysis of titanium will be disturbed after deformation twins are produced. Pure titanium is more suitable for cold inlay than hot press inlay. Hot-press inlay may change the content and distribution of hydrogen in pure titanium. Pure titanium is difficult to remove scratches and plastic rheology during Structural titanium metal stamping bending parts preparation.

 

Cut way: laser cut

Titanium alloy：Grade 5

properties: excellent corrosion resistance

Characteristics of titanium processed parts:：

1. Low density, high strength and high specific strength

Metal	Titanium alloy	Fe	Al alloy	Mg alloy	high strength steel
Density(g·cm3) specific strength	4.5 （29）	7.87 --	2.7 （21）	1.74 （16）	-- 23

2. Excellent corrosion resistance

3. Good heat resistance

4. Good low temperature performance

5. Non-magnetic

6. Small thermal conductivity

The thermal conductivity of titanium and other metals is compared in the table below:

Metal	Ti	Al	Fe	Cu
Thermal conductivity/W·(m·K)	17	212	85	255

7. Small elastic modulus

Metal	Ti	Al	Fe
Elastic Modulus/GPa	108	72	196

8. The tensile strength is close to the yield strength

The tensile strength of Ti-6Al-4V titanium alloy is 960Mpa, the yield strength is 892MPa, the difference between the two is only 58Mpa.

The comparison between titanium and other metals in tensile strength and yield strength is shown in the table below:

strength	Titanium alloy（Ti-6Al-4V）	18-8 Stainless steel	aluminum alloy
tensile strength	960	608	470
Yield Strength	892	255	294

Where is the difficulty in processing titanium alloys?

(1) Small deformation coefficient: This is a remarkable feature of titanium alloy cutting, and the deformation coefficient is less than or close to 1. The distance of sliding friction of chips on the rake face is greatly increased, which accelerates tool wear.

(2) High cutting temperature: Due to the small thermal conductivity of titanium alloy (equivalent to 1/7 of steel and 1/16 of aluminum), the contact length between chips and the front edge surface is extremely short, and the cutting force per unit area is greatly increased, which is easy to cause Chipping. The cutting heat is not easy to spread, and it is concentrated in a small range near the cutting area and cutting edge.

(3) Serious chilling and hardening phenomenon: Titanium has high chemical activity, and plastic deformation during cutting will also cause surface hardening.

(4) The tool is easy to wear: After the titanium blank is processed by stamping, forging, hot rolling, etc., a hard and brittle uneven skin is formed, which is easy to cause chipping.

Titanium alloy processing experience:

① Selection of tool material. Cemented carbide tools should be used as much as possible, and YG-type hard alloys with low affinity with titanium alloys should be selected.

For intermittent cutting or impact, high-speed steel cutting tools (such as W2Mo9Cr4VCo8, etc.) or ultrafine-grained cemented carbide (such as YG10H, YG8W, etc.) can also be used.

②Reasonably choose the geometric parameters of the tool. Tool wear and bluntness will increase the main cutting resistance of the part and cause gasket deformation. Although the cutting edge of the tool is too sharp, it is good for cutting, but the tool strength is low, and the tool is easy to wear, which increases the cutting force and also makes the part Deformation, through repeated processing practice, during finishing, the rake angle is taken as γ0=15°～20°, and the back angle is taken as α0=8°～12°.

③Choice of cutting amount. Use lower cutting speeds and larger feeds and depths of cut. When turning with a cemented carbide turning tool, it is desirable to have s=0.1~0.3mm/r; the cutting depth must be greater than the depth of oxide scale during rough machining.

④Choose a reasonable clamping method and adopt axial compression to reduce the geometric error of the workpiece. The clamping force should not be too large to avoid deformation of the workpiece.

⑤ Refining the processing procedure to reduce gasket deformation. The gasket processing process is carried out in sections, and the rough and finish machining are carried out separately to avoid process concentration and eliminate the deformation caused by the large cutting force during the finish machining. After rough turning, the parts are heat-treated to eliminate residual stress and reduce the stress deformation of the parts.

⑥ Reasonable selection of cutting parameters. Reasonable selection of cutting parameters can improve processing efficiency while effectively ensuring the processing accuracy of parts. According to experience and processing practice, the cutting speed V=50m/min, the feed rate f=0.06～0.1mm/r during finishing machining, the thinner the part, the smaller the feed rate, and the back engagement ap=0.05～0.1mm.

⑦Choose cutting fluid, use wet processing to reduce the temperature in the cutting zone, improve the surface quality and prolong the tool life. Generally, extreme pressure emulsion should be used for cooling, and the flow rate should be sufficient. Make full use of cutting fluid for cooling to prevent thermal deformation of parts and prevent heat concentration.

 

 

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why choose us:

1,Located in Baoji, the titanium valley of China, we have excellent raw materials for processing Structural Titanium Metal Stamping Bending Parts.
2,XUBO provides the most advanced titanium CNC machining services to ensure consistent quality and fast turnaround time
3,We have over 50 CNC machining centers, milling machines and lathes available, which means capacity is almost always available and prices are always competitive.
4, Our equipment includes virtually all types of CNC machining centers, milling machines and turning centers, capable of machining anything you need, from simple "machined" workholding to complex geometries with tight tolerances.

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