kobe steelkobe steel s’s activities activities in aerospacein aerospace · 2018. 4. 14. · cf34...

Kobe Steel’s ActivitiesKobe Steel s Activities in Aerospacein Aerospace

200 C fITA Ti-2007 Annual ConferenceOctober 2007

Shinya IshigaiTitanium Technology Department

KOBE STEEL, LTD. Proprietary Information 1

gy pKOBE STEEL, LTD.

Contents

Tit i M k t f A i JTitanium Market of Aerospace in JapanDevelopment Programs for Airplanes and Jet EnginesState of Manufacturing Technologiesg g

Die ForgingN N t Ri R lliNear Net Ring Rolling

Developed Alloys with Excellent


Formability

Mill Product Shipments by Applications in Japan

Total amount of shipment in 2006 was 17,317 tons

C onsum er &El t iC hem ical

O thers%

S t

M edical7.3 %

ElectricP ow er14.9 %

D istributors 11.6 %

Electrolysis

C hem ical 9.4 %

6.2 %

P H E20 5 %

Sports3.1 % A utom otive

9.3 %D li ti

Electrolysis 8.5 %

20.5 %

Ships

D esalination1.2 % A erospace

6.8 %p1.2 %

6.8 %

・Forgings for Engine（Disk，Blade，Shaft，Case etc.) ・Titanium Alloy Plate & Sheet

CP Tit i Sh t


（Disk，Blade，Shaft，Case etc.)・Forgings for Airframe（Fittings, Bulkhead)

・CP Titanium Sheet

Recent Development Programs for Civil Airplanes and Jet Engines in Japanp g p

1980’s 1990’s 2000’sDomestic D f

C-XP X

Airplane

Defense P-X

BoeingB777

B787Regional Jet MRJ

Business Jet Honda JET

IAE V2500IAE V2500

GEGE 90

GEnxJet Engine RR

TrentTr

900ent1000

Regional JetCF34


Regional JetEco Engine

Honda HF 120

Japanese Developed AirplanesTransport Cargo Plane C-X

B th lBoth planes were launched in September

Patrol Plane P X

Septe be2007

Patrol Plane P-X

KOBE STEEL, LTD. Proprietary Information 5Photos: Courtesy of Asagumo Shimbunsha Inc.Designed and Assembled by KHI

XF7-10 Engine

Regional Jet

Full Composite Wing and Body70 – 90 PassengersLarge Cabin SpaceComfortable SeatsExpected Launch in 2012


Mockup model of MRJ exhibited in 2007 Paris Air-show

Business Jet

HONDA Business Jet

Over-the-wing Engine MountLower Drag, Larger Cabin Space

Photos: Courtesy of Honda R&D Co.,LtdAll Composite FuselageOriginal Developed Turbo Fan Engine “HF120”


Lightweight, Fuel-efficient, Low-Emission

Turbo Fan EnginesJapanese manufactures of aero-engines have joined new engine development programs for B787 g p p g


GEnx Engine Trent 1000 Engine-Photo: copyright Rolls-Royce plc

V2500 Turbo Fan Engine

A320A320

Fan case

KOBE STEEL, LTD. Proprietary Information 9Photos: Courtesy of Kawasaki Heavy Industries

V2500V2500LPC disk

Trent 900 Engine

A380A380

Ti-6Al-4V IPC CASE

KOBE STEEL, LTD. Proprietary Information 10Photos: Courtesy of Rolls Royce plc

Manufactured by Near Net Ring Rolling

Trent 900Trent 900

Key Points to Grow-up the Amount of Titanium Alloy for Civil Airplane

Reliability, High QualityStable manufacturing procedure based on sophisticated forging technologies

fcontribute to achieve reliability of material.

Cost ReductionCost ReductionReduce material input weight by achieving“N N t Sh ” f i“Near Net Shape” forging.Reduce forging cost through using material with excellent formability


with excellent formability.

Titanium Forgings for Civil Aero-engineLPC blade

Fan disk

Fan blade

Stub shaft

Stator baneLPC blade

Fan disk

Fan blade

Stub shaft

Stator baneLPC blade

Fan disk

Fan blade

Stub shaft

Stator bane

Compr.CaseHPC blade

Compr.CaseHPC blade

Compr.CaseHPC blade

Fan caseFan caseFan case

Combustion TurbineCombustion TurbineCombustion Turbine

LPC disk

HPC disk

FAN Compressor

760 dia.

LPC disk

HPC disk

FAN CompressorLPC disk

HPC disk

FAN Compressor

760 dia.760 dia.760 dia.


Titanium alloys used for jet engines;Ti-64, Ti-811, Ti-6242S, Ti-17, Ti-6246, IMI834 etc.

Forging Technology of High Strength Ti-6Al-2Sn-4Zr-6Mo HPC Disk

・High strength・Higher fracture toughness

Ti-6246 Forged DiskFull acicular microstructure through β processed final forging g

（700 mm dia.）β p g g

25μm 25μm

A) Microstructure of conventional α＋β forging

• High fatigue strengthHigh elongation

B) Microstructure of β-processed forging

• High fatigue strengthLo elongation


• High elongationLow fracture toughnessHigh speed crack propagation

• Low elongationHigh fracture toughnessSlow crack propagation

Simulation Analysis for Die Forging It is important to control material temperature and forging strain during die forging in order to achieve superior material properties.Forging simulation analyses are very useful and necessary toForging simulation analyses are very useful and necessary to establish proper forging conditions (Deformation, Temperature, Cooling rate analysis on forging and solution heat treatment)β d Ti 6 2 4 6 di k f d b t t ll d hβ-processed Ti-6-2-4-6 disk forged by computer controlled hammer


Distribution of equivalent strain of forged disk

Distribution of temperature of forged disk

Example of Simulation Analysis for Die Forgingg g


Change of material temperature distributions during die forging

Near Net Ring Rolling

Fan Case of V2500 Engine(Ti-6Al-4V,

1700mm dia.)

IPC Case of Trent 900 Engine (Ti-6Al-4V


(Ti 6Al 4V, 1200mm dia.)

Example of Simulation Analysis for Near net ring rollingg g


High Cost-performance Alloysg yWe propose two kinds of developed titanium alloys with superior formability to apply for airframe

“KSTI 9” “KS EL F”Expensive? A tit i ll diffi lt t b ll d f d?

material, “KSTI-9” and “KS EL-F”

Are titanium alloys difficult to be rolled or forged?Change the image of Titanium alloy by using of our advanced alloys !!advanced alloys !!These alloys have excellent formabilities with equal and higher mechanical properties than Ti-6Al-4V !1) Coilable alloy;

KS TI-9 (Ti-4.5Al-2Mo-1.6V-0.5Fe-0.3Si-0.03C)2) E t f ll


2) Easy to forge alloy;KS EL-F (Ti-4.5Al-4Cr-0.5Fe-0.2C)

Coilable Alloy “KS TI-9”Cold Rolled in coil to coil as same as CP titaniumCapable of SPF/DB

1400

L direction

KS TI-9(ASTM G35)

1000

1200

h /

MPa

L direction

T direction

(ASTM G35)

600

800

um s

trengt

h

2.0 t mm

200

400

Max

im

300 mm

0

1.00E+04 1.00E+05 1.00E+06 1.00E+07

C ycles to failure / cycle


SPF/DB Honeycomb structure

Smooth axial fatigue properties of KS TI-9 1.2 mm thick sheet

Advantage of KS TI-9 Compared with Ti-6Al-4V

Low ProductivityHigher Cost

Process for Sheets of Ti-6Al-4V

p

Should be cut and hot rolled with steel pack Ti-6Al-4V Plates

Steel Packed

Process for Coil Strip of KS TI-9

B kd

Cold rolled in coil to coil by the steel mills with high productivity

Breakdown Forging Rolling

Hot Rolling

Ann.& Pickling

Ann.& Picklingβtransus

965erat

ure

Cold RollingTe

mp

KOBE STEEL, LTD. Proprietary Information 20Slab Hot Strip Cold StripBloomIngot

Advantage of KS EL-F

mmExtra Low flow stress and excellent hot forge-abilityEasy to make precision net forgings as same as steelReduce material input weight reheating times inReduce material input weight, reheating times in forging, and defects

190 1200

a

130

mm

800

1000

ngth

/ M

Pa

High StrengthKS EL-F

KS EL F

400

600

nsile

Stre

n

Low Flow StressKS EL-FTi-6Al-4VCP-Gr. 2

0

200

200 400 600 800 1000 1200

Ten Low Flow Stress


Temperature dependence on tensile strength compared with KS EL-F and Ti-6Al-4V

50 mmTemperature / C

Summary

The amount ratio of titanium product shipment f k t i b t 7 % i Jfor aerospace market is about 7 % in Japan.There are many development programs of civil air-planes and jet engines in Japanplanes and jet engines in Japan.Reliability and high quality required to aerospacematerial can be achieved by sophisticated forgingmaterial can be achieved by sophisticated forging technologies, such as computer controlled forgingand near net ring rolling supported by simulation analysis.Our developed titanium alloys with excellent form-bilit h t d t t d ti


ability have great advantage on cost reduction.

kobe steelkobe steel s’s activities activities in aerospacein aerospace · 2018. 4. 14. · cf34...

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