DOOSAN PLASTIC MOLD STEEL DP10 drill working time is short. Tools wear is small. DP10 product has a...
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DOOSAN PLASTIC MOLD STEEL
DP10Doosan Heavy Industries & Construction
GLOBAL LEADER IN POWER & WATERWe are helping to drive economic development around the world by supplying the basic materials and building the facilitiesneeded by industry. Our product portfolio includes castings and forgings, nuclear power plants, thermal power plants, waterdesalination plants, environmental plants, and material handling systems.
Superior mirror polishability and high rust resistivityDP10 has a superior cleanliness by using the special technology for refining and electroslag remelting, which is required in plastic mold steel.It also has outstanding properties such as resistance to rust, corrosion, erosion and goodweldability. Especially, it offers superior mirror polishability.DP10 is supplied in free hardened condition.
DP10 product characteristics marks and applications■ Although high hardness, DP10 has the excellent machinability, especially in
gun drill work.
* DOOSAN Precipitation free harden mold steels 2010** Steam Injection Method*** Gas Injection Method
DP10
HP70
Grade
38~42
37~42
Hardness(HRc) Machinability
◦
Rust-resistivity
◦
Mirror-polishability
◦
Gun Drill workability
△
Repair-weldability
■ Characteristic•Applied to superior mirror polishability from #8,000 to #14,000 of lapping grade with
excellent cleanness•Excellent Gun Drill workability (flatness and straightness)•Suitable for precision mold steel•Long fatigue life•Minimization in the increase of hardness during the machining and welding process
■ Application : Plastic Injection mold steels for superior mirror polishability•TV part : LCD/LED TV front panel and stand•Premier home appliances : advanced audio, front cover of air conditioner and refrigerator•High class automobiles : Lamp, Head Light, Audio Frame etc.
Excellent >◦ >△ > x Poor
Adv.DP10
DP10*
Rust
resi
tivity
,Cle
anlin
ess,
Wel
dability
Mirror polishability, Hardness
Transfer Injection MoldingTransparent exterior product :
HRc 32~36(VTR, lighting equipments)
SIM**, GIM*** of double-shotInjection Molding
Transparent exterior product :HRc 40±2
(LCD, LED, PDP, etc.)
High funtional materialTransparent exterior
TrTrT ansfer Infer Inf jection MoldingTrTrT ansparent exterior product :t
T f If j ti M ldi
HP4A(D1)HP4MA(D2)
HP4MA(D2) HHHP70
DOOSAN HEAVY INDUSTRIES & CONSTRUCTION
Mechanical Properties
>1092
Yield Strength(MPa)
at RT
>1200
Tensile Strength(MPa)
17
Elongation(%)
40±2
Hardness(HRc)
12.7
Impact Absorbed Energy(J/cm2), 2mm-U notch
DP10 TS
DP10 YS
DP10
20 --
15 --
10 --
5 --
0 --Comm. mat'l
CUN
Ener
gy,J
/cm
2
0 50 100 150 200
CenterSurface
Temperature, ℃
60 --
50 --
40 --
30 --
-- 1300
-- 1250
-- 1200
-- 1150
1100
Har
dnes
s,H
Rc
UTS
,MPa
Stre
ngth
,MPa
1400
1200
1000
800
6000 100 200 300 400 500
DP10 RA
DP10 EL
100 200 300 400 500
Temperature, ℃
100 --
80 --
60 --
40 --
20 --
0 --
EL&
RA,%
TSHRc
■ Uniform hardness distribution and excellent mechanical properties
■ Excellent corrosion resistance
Rust Resistivity
DP10 Typical material of precipitation hardening steel
Dipped in water
for 82hrs
Sprayed 1㎛ -polished(3') Sprayed 1㎛ -polished(3')
Sprayed in 5%
Nacl for 65hrs
* Tess-over photography after sprayed salt water and dipped in water (x1.1)
■Outstanding cleanliness properties, it can be applied to maximum #14,000 of lapping grade
Index of Cleanliness / Mirror Polishability
0.15
0.10
0.05
0.00
-0.05DP10 Comm. mat'I
Surf
ace
Roug
hnes
s,㎛
■ Gun drill working time is short. Tools wear is small. DP10 product has a flatness and straightness (with in 1m/m/1,000m/m, surface roughness more than 2.5S)
Gun Drill Workability
■ Specific Gravity 7.82 ■ Young’s Modulus 217GPa
■ Thermal Conductivity ■ Thermal Expansion Coefficient
Physical and Thermal Properties
•Gun Drill size : Ø6.0mm•Intermittent : 1,170mmL•Continuous : 1,000mmL x 5회=5,000mmL
as -Ø6.0
DP10
200 --
150 --
100 --
50 --
0 --Comm. mat'l
Mac
hini
ngTi
me,
min
.
60
40
20
0
-20
Ther
mal
Cond
uctiv
ity,W
/m.K
0 100 200 300 Temperature, ℃
0 100 200 300 400 500
20
15
10
5
0
Ther
mal
Expa
nsio
nCo
effic
ient
,10
-6/℃
Temperature, ℃
Intermittent
Continuous
■Minimized hardness variation depending on location(WM*/HAZ**/BM***) after repair welded■ No appearance of yellowing phenomenon, gas bubble and weld line after re-lapped with
GTAW/Laser weld
Weldability Characteristics
■ GTAW (Pre Heat), (Inter-pass Heat) : 250 ~ 330±30℃■ GTAW (Post Heating) : 300 ~ 350℃
■ GTAW PWHT
■ Laser Weld : Not apply to heat
GTAW / Laser Weld Cycle
< Lapping(#14,000) after repair welded >
BM
GTAW, Pre-heat
GTAW, NO-heat
BM ▶◀◀ ▶
WMHAZ HAZ
* Required hardness of user
GTAW_P
GTAW_N
Method
TGS-5CM
AdaptionWeld Rod
NO
NO
Weld lineafter 1㎛polish
1.69
1.04
HAZ Width(mm)
Welded
A.C
300~350℃
30(min)/inch
RT
A.C
450~590℃*
1~2hrs
0
10
20
30
40
50
60
70
Distance
Har
dnes
s,H
Rc
* Weld Metal ** Heat Affect Zone*** Base Metal
Doosan Heavy Industries & Construction www.doosanheavy.com
SEOUL OFFICE HEAD OFFICE AND CHANGWON PLANTMail Code 137-920 Mail Code 642-792 22 DoosanVolvo-ro, 465 Gangnam-daero, Seocho-Gu, Seoul Korea Seongsan-Gu, Changwon, Gyeongnam KoreaTel. 82-2-513-6114 Fax. 82-2-513-6200 Tel. 82-55-278-6114, 7114 Fax. 82-55-264-5551~2
| DP10 Product Applications |
premier automobile
LCD/LED TV standair conditioner
refrigerator
smart phone LCD/LED TV front panel
water purifierwater softener
DP10
