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HIGH PERFORMANCE HOT WORK TOOL STEEL
DTX2
Doosan Heavy Industries & Construction
DOOSAN HEAVY INDUSTRIES & CONSTRUCTION
TOOL STEEL FOR DIE CASTING & HOT STAMPING DTX2
03
TOOL STEEL FOR DIE CASTING & HOT STAMPING DTX2 CONTENTSCharacteristics | 특징
Mechanical properties | 기계적 특성
Thermal properties | 열적 특성
Melt-out property | 용손 반응 특성
Procedure for repair welding | 용접절차
Machinability | 기계 가공성
Applications | 적용 사례
04
07
08
09
09
10
11
DOOSAN TOOL STEELS
DOOSAN HEAVY INDUSTRIES & CONSTRUCTION
1. Higher resistance to crack initiation due to excellent toughness 인성이 우수하여 사용 중 금형의 균열 발생 억제
2. Shortens machining time and extends tool life due to excellent machinability 기계가공성이 우수하여 가공시간 단축 및 공구수명 향상
3. Better resistance to heat crack due to excellent mechanical and physical properties 기계적 특성 및 물리적 특성이 우수하여 내 heat crack 성 우수
4. Extended mold life due to higher resistance to softening at high temperature 연화 저항성이 우수하여 금형 수명 증대
Annealing 1) Quenching Tempering
800~900 °C 1000~1050 °C 550~650 °C
1) Max. hardness(HB) of as annealed material : 229
Heat treatment | 열처리
Material(재질명)
Heat crack resistance(내 heat crack 성)
High temp. strength(고온강도)
Toughness(인성)
Machinability(기계가공성)
DTX2 ◎ ◎ ◯ ◎
DTX1 ◯ ◯ ◎ ◎
STD61 △ △ △ ◯
Comparison of properties | 특성 비교
Material(재질명)
Hardness(경도)
Reference specification (규격)Applications (용도)
AISI DIN JIS
DTX2Max
HB229H13
Improved1.2344
ImprovedSKD61
ImprovedDie-casting, Hot-stamping, Extrusion die,
Hot forming die with high performance
High performance hot work tool steel
CHARACTERISTICS | 특징
Time
Tem
pera
ture
(°C)
1200
1000
800
600
400
200
0
1000~1050°C
550~650°C
80~100°C
550~650°C
2nd Preheat(700~800°C)
1st Preheat(500~600°C)
Austenitizing
1st Tempering 2nd Tempering
High Pressuregas cooling
Air cooling Air cooling
■ Heat treatment cycle | 열처리 조건 ■ Quenched & tempered hardness | 소입 & 소려 경도
Har
dnes
s (H
Rc)
Test temperature(°C) x 2H, Twice
As quenched
60
55
50
45
40
35
30
25
200 300100 400 500 600 700
Excellent ◎ > ◯ > △Poor
DOOSAN TOOL STEELS
05
Continuous cooling transformation curves | 연속 냉각 변태
Excellent properties compared with standard materials I 우수한 특성
Austenitization at 1030°C
Tem
pera
ture
(°C)
Time (s)
1000
800
600
400
200
01 100.1 100 1000 10000 100000
F+PBM
DTX2
100 °C/s 5 °C/s10 1 0.5 0.2 0.1 0.15 0.02 0.005
■ High temperature yield strength | 고온항복강도
■ Thermal conductivity | 열전도도
■ Softening resistance | 연화저항성
■ Impact absorbed energy | 충격인성
Str
engt
h (M
pa)
DTX2 DTX1 STD61
430
390383
Ther
mal
con
duc
tivi
ty (W
/mK)
DTX2 DTX1 STD61
28.2
31.7 31.9
Imp
act a
bso
rbed
en
ergy
(J/c
m^
2)
DTX2 DTX1 STD61
52.3
33.8
54.7
Har
dn
ess
(HR
c) 50
40
30
20
10
0
DTX2 DTX1 STD61
21.320.926.1
MS
MF
400°C
DOOSAN HEAVY INDUSTRIES & CONSTRUCTION
Nitriding property | 질화 특성
Softening resistance at elevated temp. | 고온 연화저항성
CHARACTERISTICS | 특징
■ Hardness after nitriding | 질화 후 경도
• 질화 방법(Process) : 침류질화(Sulfnitriding)
• 초기 경도(Hardness before nitriding) : 45HRc
Har
dnes
s (H
Rc)
Holding time at 600°C (Hrs)
Quenched & tempered
50
40
30
20
1 10010 1000
DTX2DTX1STD61
Har
dnes
s (H
Rc)
600°C650°C700°C
Holding time (Hrs)
Quenched & tempered
50
45
40
35
30
25
20
0.11 1 10 100
Har
dnes
s (H
V 0.
1Kg)
510°C x 5Hrs510°C x 10Hrs
Distance from the sufrace (μm)
1200
1000
800
600
400
1500 300 40035025020010050
DOOSAN TOOL STEELS
07
MECHANICAL PROPERTIES | 기계적 특성
■ Tensile strength at room temp. | 상온인장 ■ Tensile strength at high temp. | 고온인장
Stre
ngth
(MPa
) 2000
1800
1600
1400
1200
1000
800
Tensile strengthYield strength
Duc
tility
(%)
Hardness (HRc)
Hardness (HRc)
524034 46 48 5044423836
524034 46 48 5044423836
Elongation Reduction of area
60
50
40
30
20
10
Stre
ngth
(MPa
) 600
550
500
450
400
350
300
250
Tensile strengthYield strength
Hardness (HRc)
Hardness (HRc)
Duc
tility
(%)
40
40
34
34
46
46
52
52
48
48
50
50
44
44
42
42
38
38
36
36
100
90
80
70
60
50
40
30
Elongation Reduction of area
■ Impact absorbed energy | 충격인성
Abso
rbed
ene
rgy
(J/C
m2)
Hardness (HRc)
140
120
100
80
60
40
20
4034 46 504844423836
DTX2
DTX1
STD61
Thermal expansion coefficient 열팽창계수 (x10-6/˚C)
Thermal conductivity열전도도 (W/mK) Young's modulus
영율 (GPa)200˚C 400˚C 600˚C 25˚C 200˚C 400˚C 600˚C
DTX2 11.8 12.7 13.5 28.5 30.9 31.7 26.3 217
DTX1 12.8 13.5 14.2 29.5 31.7 31.9 31.6 216
STD61 11.6 12.5 13.2 24.0 26.5 28.2 28.9 200
Physical properties | 기본 물성
Heat crack property | 열피로 특성
DOOSAN HEAVY INDUSTRIES & CONSTRUCTION
THERMAL PROPERTIES | 열적 특성
■ Test 방법 ■ Heat crack 양상
1 cycle
35sec14sec
650℃
High frequency induction heating
고주파 유도가열
Total 1,000Cycle
Water cooling
냉각 : 수냉
25℃
60mm
Heat crack 측정(길이, 균열 수)
원통형 시험편(ø43x60mm, 45HRc)
■ Average heat crack length | 평균 길이 ■ Max. crack length | 최고 균열 길이
(μm
)
DTX2 DTX1 STD61
460
292
215
(mm
)
DTX2 DTX1 STD61
3.78
2.241.96
DOOSAN TOOL STEELS
09
MELT-OUT PROPERTY | 용손 반응 특성
PROCEDURE FOR REPAIR WELDING | 용접절차
Test method | 시험방법
Welding condition | 용접조건
Process Current전류 (A)
Voltage전압 (V)
Speed(cm/min)
Preheat temp.예열온도 (℃)
Preheat temp.예열온도 (℃)
Current/Polarity
Flow rate가스유량 (l/min )
Welding rod(용접봉)
Shielding Gas
GTAW 160 ~ 180 13 ~ 16 12 ~ 15 250 ~ 300 Max. 300 DCSP 10 ~ 15 BKD61R Ar (99.99%)
Depth of melt-out | 용손 깊이
DTX2
DTX1
STD61
(μm
)
DTX2 DTX1 STD61
400
280
232
Specimen size : 40 x 40 x 20 (mm)
Graphite crucible
Heater
Thermocouple (k-type) : 700±2°C
용탕 : Liquid Al (700°C)
Time (침지시간) : 43Hrs
Sealed by refractory material (super-3000)
specimen
4mm
1 mm distanceThe data taken 10 times
Specimen
Evaluation of depth | 용손 깊이 측정
Heat treatment | 열처리
* PWHT condition (후열처리 조건)
1) Heating rate(가열속도) : Max. 85 °C/hr
2) Holding temp.(유지온도)
- 580~600℃ (HRc 47~48)
- 560~580℃ (HRc 50~52)
3) Holding time (유지시간) : 2Hr
4) Double PWHT (동일 조건으로 PWHT 2회 실시)
Time (hr)
Tem
pera
ture
(°C)
350~400°C x 2hrs
100~150°C
250~300°C x 2hrs
Welding
Preheat
Post heating
PWHT *
Air cooling
250
DOOSAN HEAVY INDUSTRIES & CONSTRUCTION
Machinability test (End mill)
Evaluation of tool life | 공구수명 평가
MACHINABILITY | 기계 가공성
Variable As annealed As quenched
*Feed per tooth(mm/tooth)
0.07 0.05
*Spindle speed(rpm)
7,200 5,000
Axial depth of cut(mm)
3.0 3.0
Radial depth of cut(mm)
0.5 0.5
소재Tool life
DTX2 DTX1 STD61
Asannealed
Asquench-
tempered
270m 212m 132m
165m 106m 62m
Milling Tool
Workpiece
■ As annealed test
Resu
ltant
cut
ting
forc
e (N
)
Cutting length (m)
300
250
200
150
100
501500 300 35025020010050
DTX2DTX1STD61
■ As quench-tempered test
Resu
ltant
Cut
ting
Forc
e (N
)
Cutting length (m)
500
400
300
200
100
900 180 2101501206030
DTX2DTX1STD61
Tool life Tool life
DOOSAN TOOL STEELS
11
Applications for die casting | 다이캐스팅 금형 적용 사례
Mold As assembledProduct
■ Timing chain cover | 타이밍 체인 카바
■ Auto transmission housing | 자동 변속기 부품
APPLICATIONS | 적용 사례
Mold As assembledProduct
Applications for hot press forming | 열간 프레스 성형 금형 적용 사례
■ Center piller for car body | 차체용 센타필러
Mold Product
Doosan Heavy Industries & Construction창원본사 (HEAD OFFICE AND CHANGWON PLANT)우편번호 51711 경상남도 창원시 성산구 두산볼보로 22
Mail Code 51711 22 DoosanVolvo-ro,Seongsan-Gu, Changwon, Gyeongnam Korea(T) +82-55-278-6114, (F) +82-55-264-5551/5552
www.doosanheavy.com서울사무소 (SEOUL OFFICE)우편번호 06611 서울시 서초구 강남대로 465Mail Code 06611 465 Gangnam-daero,Seocho-Gu, Seoul Korea(T) +82-2-513-6114, (F) +82-2-513-6200
GLOBAL NETWORK
EUROPE
Subsidiaries
DOOSAN POWER SYSTEMS LTD.Doosan House, Crawley Business Quarter, Manor Royal, Crawley, West Sussex, RH10 9AD, United KingdomTel 44 1293 612888Fax 44 1293 584321
[DOOSAN BABCOCK]Porterfield Road, Renfrew, PA4 8DJ, United KingdomTel 44 141 886 4141Fax 44 141 885 3338
[DOOSAN ŠKODA POWER] Tylova 1/57, 301 28 Plzen, Czech Tel 420 378 185 000Fax 420 378 185 910
[DOOSAN LENTJES] Daniel-Goldbach-Strasse. 19, 40880 Ratingen, GermanyTel 49 2102 166 0Fax 49 2102 166 2500
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Branches
FRANKFURT OFFICE7th Floor, Arabella Center, Lyoner Strasse 44-48, 60528 Frankfurt am Main, GermanyTel 49 69 69 5004 0Fax 49 69 69 5004 10
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ASIA
Subsidiaries
DOOSAN POWER SYSTEMS INDIA PVT. LTD.
[CHENNAI OFFICE]18/2A, Senneerkuppam, Bypass Road, Poonamallee, Chennai 600 056, Tamil Nadu, IndiaTel 91 44 3303 5000Fax 91 44 3303 5001
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[NEW DELHI OFFICE]16th Floor, DLF Square Building, Jacaranda Marg, Near NH-8, DLF Phase-II, Gurgaon, Haryana 122 002, IndiaTel 91 124 439 8200Fax 91 124 414 7006
[KOLKATA OFFICE]South City Pinnacle, Mangalam Business Center Suite No - 1214, 12th Floor, Salt Lake, Sector – V Kolkata – 700091Tel 91 33 4019 3425Fax 91 33 4019 3430
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Branches
BEIJING OFFICE19th Floor, Gateway Plaza, Tower B, No. 18 Xiaguangli, North Road, East Third Ring Chaoyang District, Beijing 100027, ChinaTel 86 10 8454 7122, 7136Fax 86 10 8484 7139
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HANOI OFFICE#1101, Daeha Business Center, 360 Kim Ma, Ba Dinh District Hanoi, VietnamTel 84 4 6273 0545~9Fax 84 4 6273 0550
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MANILA OFFICEUnit 1802, One World Place, 32nd street, Bonifacio Global City, Taguig City 1634, PhilippinesTel 63 2 801 4619Fax 63 2 801 4616
SHANGHAI OFFICERm2903A, Gubei International Fortune Center, No.1438, Hong Qiao Road, Chang Ning District, Shanghai, 201103, China Tel 86 21 5877 8696Fax 86 21 5877 5938
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AMERICAS
Subsidiaries
DOOSAN HEAVY INDUSTRIES AMERICA CORP.10th Floor, Parker Plaza, 400 Kelby Street, Fort Lee, NJ 07024, USATel 1 201 944 4554 31, 24Fax 1 201 944 5022
[NEWINGTON OFFICE]178 Shattuck Way, Newington, NH 03801, USATel 1 603 433 5507Fax 1 603 433 1060
[PITTSBURGH OFFICE]1000 Westinghouse Drive, Building 2, 239D, Cranberry Township, PA 16066, USATel 1 412 374 6071Fax 1 724 720 0903
DOOSAN ENGINEERING & SERVICES LLC5 Paragon Drive, Montvale, NJ 07645, USATel 1 201 746 8200Fax 1 201 746 8210
DOOSAN HYDRO TECHNOLOGY, INC.912 Chad Lane, Tampa, FL 33619, USATel 1 813 549 0182Fax 1 813 623 6666
DOOSAN ATS AMERICA, LLC11360 N. Jog Road, Palm Beach Gardens,FL 33418, USATel 1 561 572 9100Fax 1 561 572 9101
Branches
SANTIAGO OFFICEAv. Nueva Tajamar 481, Torre Sur, Piso 11, Oficina 1103, Las Condes, Santiago, ChileTel 56 2 2657 3333Fax 56 2 2657 3343
TAMPA OFFICE912 Chad Lane, Tampa, FL 33619, USATel 1 813 549 0182Fax 1 813 623 6666
TAMPA WATER R&D CENTER912 Chad Lane, Tampa, FL 33619, USATel 1 813 549 0182Fax 1 813 623 6666
MIDDLE EAST & AFRICA
Branches
ABU DHABI OFFICE# 508, Al Ghaith Tower, Hamdan Street, P.O. Box 27767, Abu Dhabi, UAETel 971 2 627 6273Fax 971 2 627 6274
CAIRO OFFICE2nd Floor, Land Mark Building 1,67 El Teseen St., 5th Settlement, New CairoTel 20 2 2537 1040Fax 20 2 2537 1041
DUBAI OFFICE30th Floor, H HotelOffice Tower,Sheikh Zayed Road, P.O.Box 11859,Dubai, UAETel 971 4 327 5545Fax 971 4 327 5529
DAMMAM WATER R&D CENTERAl Turki Business Park 9th Floor, Al Khobar 31952, Eastern Province, Kingdom of Saudi ArabiaTel 966 3 868 6951Fax 966 3 868 7100
KUWAIT OFFICE7B, Block 49, Plot 35, Laila Commercial Tower, Salmiya, P.O Box 2031 KuwaitTel 965 6001 3075Fax 965 2575 2001
MIDDLE EAST OPERATION CENTER30th Floor, H HotelOffice Tower, Sheikh Zayed Road, P.O.Box 11859, Dubai, UAETel 971 4 327 5545Fax 971 4 327 5592
RIYADH OFFICE# 205~206, The Plaza Building (Akariya No. 4), Olaya Street, P.O.Box 9656, Riyadh 11423, Kingdom of Saudi ArabiaTel 966 1 419 1696Fax 966 1 419 1995
AFRICA
Branches
JOHANNESBURG OFFICE12F, The Forum, 2 Maude Street, Sandton, Johannesburg, South Africa+27 113 265 790 (Landline)Tel 27 113 265 790Fax 966 1 419 1995
