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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
DOOSAN ENPUREDoosan Enpure House,Parklands Business Park, Rubery,Birmingham, B45 9PZ, United KingdomTel 44 121 683 2801Fax 44 121 251 9111
DOOSAN IMGB104 Berceni Road, Bucharest 4, RomaniaTel 40 21 301 2500Fax 40 21 301 2501
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
BIRMINGHAM WATER R&D CENTERDoosan Enpure House, Parklands Business Park, Rubery, Birmingham, B45 9PZ, United KingdomTel 44 121 683 2800Fax 44 121 683 2888
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
[MUMBAI OFFICE]501,5th Floor, CNB Square Bldg.Sangam Complex, Near Sangam Cinema, Andheri-Kurla Road, Chakala, Andheri(East), Mumbai 400 059, IndiaTel 91 22 6177 0500Fax 91 22 6177 0599
[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
DOOSAN HEAVY INDUSTRIES VIETNAM CO., LTD. (DOOSAN VINA)Dung Quat Economic Zone, BinhThuan Commune Binh Son District, Quangngai Province, VietnamTel 84 55 3618 900Fax 84 55 713 950
DOOSAN HEAVY INDUSTRIES JAPAN CORP. Mita Kokusai Bldg, Room 2413, 1-4-28, Mita, Minato-Ku Tokyo 108-0073, JapanTel 81 3 3452 5451~3Fax 81 3 3452 5624
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
BANGKOK OFFICE10th Floor, M-Thai Tower, All Seasons Place, 87 Wireless Road Phatumwan, Bangkok 10330, ThailandTel 66 2 654 0690Fax 66 2 654 0693
HANOI OFFICE#1101, Daeha Business Center, 360 Kim Ma, Ba Dinh District Hanoi, VietnamTel 84 4 6273 0545~9Fax 84 4 6273 0550
JAKARTA OFFICEPlaza Bapindo, Mandiri Tower 20F, JlJendSudirman No 54-55, Jakarta, IndonesiaTel 62 21 2995 0101Fax 62 21 2995 0108
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
TAIPEI OFFICE#704, No.51, Keelung Road Section 2, Taipei, Taiwan, R.O.C.Tel 886 2 2739 2255Fax 886 2 2739 2266
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