charles pepka chief executive director renton coil & spring … · 2018-04-14 · charles pepka...
TRANSCRIPT
Charles Pepka Chief Executive Director
Renton Coil & Spring Company
New Devolvement's in Titanium Spring Materials Testing of Ti 200 for springs has begun. Successful devolvement requires cooperation between the Material suppliers, The Wire or bar mill converting the material, The Spring manufacturer, and the Customer. The paper will explore the devolvement of materials, testing, and product applications for new Titanium spring alloys.
New Developments in Titanium Spring Material
Chuck PepkaRenton Coil Spring Co Inc.
Aircraft Marketplace
• Titanium spring materials have been used in the aircraft marketplace for over 30 years.
• In-service results have shown a very high level of reliability. Weight savings and volume reduction create an efficient packagepackage.
• Material specifications and process controls make this process very repeatable through wide range of productsprocess very repeatable through wide range of products.
Non-Aircraft Marketplace
• Non-aircraft titanium springs take advantage of many of the same attributes to improve performance of the vehicles they are used on.
• Pricing in the non-aircraft marketplace has shown a limit that a consumer will not exceed in quantities at higher price pointsconsumer will not exceed in quantities at higher price points.
• Applications of new titanium materials such as Ti-200 will be limited by pricelimited by price.
Titanium’s Competition
• Sanctioning Bodies / Rules– Many Racing series stipulate that springs must be magneticMany Racing series stipulate that springs must be magnetic
• Production Costs– Building parts in small quantities may not be affordableg p q y
• Alternative Materials– Very high strength ferrous alloys
New Developments in Titanium Spring Material
• Ti-200, a new titanium material, has shown some success as aspring material in early trials.
New Developments in Titanium Spring Material
• Successful development requires cooperation between the Success u de e op e t equ es coope at o bet ee t ematerial supplier, the wire or bar mill that converts the material, the spring manufacturer, and the customer.
• This paper will explore the development of materials, testing, and product applications for new titanium spring alloys.
New Developments in Titanium Spring Material New Developments in Titanium Spring Material
Ti-200 Tensile Testing
TI-200 Tensile Results
210
KSI
)
185190195200205
Stre
nght
(K
170175180185
Ulti
mat
e S
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Sample #
Ti-200 Tensile Testing
JOB Lot# Wire Size Time Temp F Tensile (KSI) Tensile (MPa) Elongation RA
30139 JQU 0.2730 12 940 202 1393 16% 50%
30139 JQU 0.2730 12 940 205 1413 13% 46%
30745 JUW 0.2875 12 940 195 1344 16% 48%
30745 JUW 0.2875 12 940 196 1351 16% 46%
30746 JUW 0.2875 12 900 201 1386 14% 33%
30746 JUW 0.2875 12 900 203 1400 13% 32%
30747 JUW 0.2875 12 900 203 1400 8% 14%
30747 JUW 0.2875 12 900 204 1407 7% 10%
30748 JUW 0.2870 12 920 195 1344 23% 46%
30748 JUW 0.2870 12 920 198 1365 18% 46%
30750 JUW 0.2875 12 940 184 1269 20% 52%
30750 JUW 0.2875 12 940 189 1303 15% 51%
30751 JUW 0 2875 12 940 194 1338 17% 50%30751 JUW 0.2875 12 940 194 1338 17% 50%
30751 JUW 0.2875 12 940 194 1338 18% 51%
30755 JUW 0.2865 12 940 202 1393 13% 44%
30755 JUW 0.2865 12 940 203 1400 15% 38%
Ti-200 Tensile Testing
TI-200 Tensile Results
205210
KSI
)
185190195200205
Stre
nght
(K
170175180185
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Ulti
mat
e
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Sample #
Ti-200 Tensile Testing
JOB Lot# Wire Size Time Temp F Tensile (KSI) Tensile (MPa) Elongation RA
30750 JUW 0.2875 12 940 184 1269 20% 52%
30750 JUW 0.2875 12 940 189 1303 15% 51%
30751 JUW 0.2875 12 940 194 1338 17% 50%
30751 JUW 0 2875 12 940 194 1338 18% 51%30751 JUW 0.2875 12 940 194 1338 18% 51%
30745 JUW 0.2875 12 940 195 1344 16% 48%
30748 JUW 0.2870 12 920 195 1344 23% 46%
30745 JUW 0.2875 12 940 196 1351 16% 46%
30748 JUW 0.2870 12 920 198 1365 18% 46%
30746 JUW 0.2875 12 900 201 1386 14% 33%
30139 JQU 0.2730 12 940 202 1393 16% 50%
30755 JUW 0.2865 12 940 202 1393 13% 44%
30746 JUW 0.2875 12 900 203 1400 13% 32%
30747 JUW 0.2875 12 900 203 1400 8% 14%
30755 JUW 0.2865 12 940 203 1400 15% 38%
30747 JUW 0.2875 12 900 204 1407 7% 10%
30139 JQU 0.2730 12 940 205 1413 13% 46%
Ti-200 Cycle Testing
Life vs. max stressfor Ti 200 compression springs
N 1,528,653 cycles R .208 wirediameter .554
N 739 791 l R 208 ifor Ti 200 compression springs
140
160
180
)
N 739,791 cycles R .208 wirediameter .554
N 1,277,941 R.43 wire diameter .275
N 300,010 R.43 wire diameter .275
80
100
120
140
mum
str
ess
(ksi
) F 147,592 R.43 wire diameter .275
F 379,272 R.41 wire diameter .275
F 191,555 R.41 wire diameter .275
0
20
40
60
Max
im F 299,379 R.41 wire diameter .275
F 139,092 R.41 wire diameter .275
F 248,649 R.41 wire diameter .275
100000 1000000 10000000
Cycles completed
F 101,245 R.41 wire diameter .275
F 247,168 R.12 wire diameter .375
N 266,173 R.12 wire diameter .375 F designates failure N no failueN no failue
Titanium Applications
Off-Road Racing
Motorcycles
Motorcycles
Video courtesy of Bill Werner
Open Wheel Racing
Snowmobiles
Snowmobile
Video courtesy of Mountain Mod Mania
Drag Racing
ATV
Dirt Oval Racing
Boat Racing
Conclusion
Ti 200 needs more development but the results look goodTi 200 needs more development but the results look good
Aging time and temps need to be optimized
There are many uses in the non aircraft market
Cycle testing is continuing on many wire sizes
Thank You!
