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Titanium Clad Copper Rods

1.Titanium clad copper rectangular/round/square/drum bars with coating material Ti ASTM B265 Grade 1 and core material copper ASTM C11000 and ASTM C10200
2.Usage: electrochemistry, electroplating, metal finishing, metal recovery
3.SS Clad Cu/Zr Clad Cu/Nb Clad Cu/Ni clad Cu
4.Thermal shock test, ultrasonic test, split test, PT test
5.Excellent conductivity and fully ductile for shaping and forming

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Materials and dimensions

Clad material: Ti, ASTM Gr.1 or Gr.2

Core material: Cu, ASTM C11000 and ASTM C10200

Electric conductivity: Cu-HCP ≥99 % IACS 58 MS/m

Dimensions:                           Dimension in mm                       Dimension in inch

Rectangular and square:          up to 20 x 120 mm                     up to 0.8" x 4"

Typical Ti Thickness:               0.6mm-3.0mm

Length up to 10meters, bent or precut

Customize shapes and size


Product tests

a.Chemical analysis for titanium tube and copper bars

  Table 1

Grade


Ti

Fe

C

N

H

O

Single

Total





TA1

Pure    Ti

Residual

0.2

0.08

0.03

0.015

0.18

0.1

0.4





TA2

Pure    Ti

Residual

0.3

0.08

0.03

0.015

0.25

0.1

0.4








 Table 2

Grade

Chemical composition %

T1

CU+AG

P

AG

Bi2)

Sb2)

As2)

Fe

Ni

Pb

Sn

S

Zn

O

T23)

99.95

0.001

0.001

0.002

0.002

0.005

0.002

0.003

0.002

0.005

0.005

0.02

T3

99.9

0.001

0.002

0.002

0.005

0.005

0.005

TU04)
     [C10100]

99.7

0.002

0.01

CU
     99.99

0.0003

0.0025

0.0001

0.0004

0.0005

0.0010

0.0010

0.0005

0.0002

0.0015

0.0001

0.0005

TU1

Se:0.0003  Te:0.0002  Mn:0.000 05  Cd:0.0001

TU2

99.97

0.002

0.001

0.002

0.002

0.004

0.002

0.003

0.002

0.004

0.003

0.002

TP1
     [C12000]

99.95

0.002

0.001

0.002

0.002

0.004

0.002

0.004

0.002

0.004

0.003

0.003

TP1
     [C12200]

99.90

0.004~0.012

TAG0.1

99.9

0.015~0.040


CU
     99.5

0.06~0.12

0.002

0.005

0.01

0.05

0.2

0.01

0.05

0.01

0.1

The requirement of Ti tube material incoming inspection (Cladded material is tailor-made product):

As per Chinese executive standard standards GB/T3620 or GB/T15073, titanium tube is TA0 or TA1. And they must be supplied with inspection report and chemical analysis (Refer to Table 1). Internal and external surface check for the Titanium tubes must be done at the same time. Surface defects such as crack, peeling, small pits, oxide layer, oil dirt, can not be allowed.

Copper used for Ti/Cu clad is T2 or TU1 as Chinese standard GB/T5231-2001). And they also must be supplied with inspection report and chemical analysis (Refer to Table 2). After receiving certificate, our inspector will check copper bar one by one, including length, roundness. Length is  recorded by tape measure.Roundness shall be measured by micrometer and caliper with records. Roundness within +/- 0.1mm is qualified, otherwise unqualified.


b.  Flattening test

QQ图片20181105111436

Negative result


QQ图片20181105111343

Positive result

Flattening test equipment is oil hydraulic press machine. Cut 20mm of Titanium tube end as sample to press until the length H.  No crack is allowed in flattening test. H=(1+e)t/(e+t/D)                                      Where:                                                                                                                                                  H=distance between flattening plates, in.[mm],                                                                            

t=specified wall thickness in.[mm],                                                                                              

D=specified or caculated (from the specified inside diameter and wall thickness) outside diameter in.[mm],                     

e=deformation per unit length(0.07 for TA1, TA2 and TA9-1).

c.Material Preparation before Assembly                                                                                                After production order sent, the production manager shall make detail review in the drawing. If checked ok, he shall request production teams to prepare Ti tubes and Cu bars for cleaning and following work. To be well prepared for next process.   

d.Thickness Control of Ti Tube and Cu Bar of Inspection Requirements during Rolling Process           During extrusion process, the inspector shall check the surface and roundness of each batch of composite material. Before extrusion, it is necessary to paint MoS2 Lubricant in order to keep the uniformity during extrusion, and protect Ti layer from scratch or crack. In case of scratch, it must be repaired in time. Using polishing grinding tool to repair, and do fine grinding, in order to avoid any problem in next sequences. During extrusion, the inspector shall do roundness check for composited material, using micrometer to check and record. The tolerance shall be in accordance with the drawing requirement.

e.Straightness Test                                                                                                                                   After half-finished product rolled, need to do grinding and polishing. Then do straightening, the straightness shall measure each composite bar (round, rectangular, square, eclipse) by feeler, the straightness should be smaller than 0.5mm/m. (use micrometer for round, eclipse shape measurement, 3+ spots to be done and recorded)

QQ图片20190105113157

Qualified


QQ图片20190105113209

 Unqualified


f.Thermal shock test

During the test process, a sample is annealed at a temperature of 520°C for a period of one hour and then subject to water quenching in a basin. This process is repeated up to forty times.


The tests of Ti/Cu Clad do not show any impairment regarding quality of the metallurgical bond. 

As a result, the clad material bars can be directly coated with iridium, platinum or mixed oxides, since this process requires thermal treatment with many cycles at high temperatures.


g.Ultrasonic testing

QQ图片20181105111418

Negative result


QQ图片20181105111727

Positive result


The ultrasonic testing has been successfully used as a means of quality control in the recent years. Certain types of defects such as cracks or adhesion problems can be detected due to a higher efficiency of the testing techniques. UT test is required for every batch 5% for Ti-Cu clad rod. If any unacceptable defects are found during 5% UT, the extension of UT will be double as 10%; if more unacceptable defects are found during 10% UT, 100% UT will be mandatory for this batch. When the detection part bottom echo is clear, Ti and Cu composite plane has no echo display, this area is defined as quality. When detection area bottom echo diminish or disappear, and the according Ti/Cu composite interface echo is coming to display, this area shall be regarding unquality. 


h.  Split test

QQ图片20181105111646

Accepted cladding


QQ图片20181105111717

Rejected cladding


The so-called split test is a fast and proven method to an overall quality test.

The purpose of the split test is to try to separate the titanium layer from the copper core by using the lathe to mill the titanium layer of the sample bars from four sides. After separation, if color of copper surface is silvery white, without oxide layer, this will be regarded qualified. If the color is dark brown, with oxide layer, this will be regarded unqualified. The inspector shall check the Ti tube thickness and Copper bar thickness, width after Ti and Cu separation. Ti tube thickness should follow customer requirements(normally ±0.10mm). Copper material thickness shall measure by caliper and checked as per drawing requirement. After inspector signed, batch production may proceed.


i. PT test

QQ图片20181105111805

Defective point 


QQ图片20181105111759

No defect

After half-finished workpiece rolled, grinding, polishing, cut and straightened, welding can be performed. The welder has to do some  preliminary work, including spot cleaning and beveling. And then do welding filling.  After work done, the inspection shall do flaw detection for finished product one by one. (welding seam do PT, UT) 

i. Clean surface of bars with remover

ii. Spray penetrant on the bar surface and keep wet for 15 minutes.

iii. Wipe out excess penetrant on the surface, and then clean by cleaner or water.

iv. After surface drying, spray developer to the testing surface(spraying distance about 150-300mm)and keep wet for 15 minutes.

When doing PT, the temperature should be above 10℃. Testing shall proceed from 30 mins after developing solution sprayed in the workpiece. UT is mainly used to check if the cladded material is well cladded.

g. Further processing 

The clad material is so strong that the clad titanium can be welded with other titanium components by tungsten-inert gas welding (TIG-welding), laser or spot welding without damaging the compound.


Apllication

Titanium clad copper bars are generally used in electrochemistry, electroplating, metal finishing, metal recovery wherever high corrosion protection and high current-carrying capacities are required.


Further clad materials

Stainless steel Clad copper(SS Clad Cu) Stainless steel-Copper

Zirconium Clad copper(Zr Clad Cu)Zirconium– Copper

Niobium Clad copper(Nb Clad Cu)Niobium- Copper

Nickel Clad copper(Ni clad Cu)Nickel- Copper


MOLD SPECIFICATIONS


SPECIFICATIONS OF MOLDS


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