Cold work steel D2 1.2379

الوصف

Related Specifications
Germany DIN X**3 CrMoV***1
W Nr 1.***9
Great Britain BS***9:BD2
USA AISA D2
Japan JIS G ***4 SKD*1
GB Cr*2Mo1V1
Austra K**0
Decription
The cold worked tool steel D2 is a high carbon, high Chromium alloy steel. It is with high
dimensional stability in heat treatment. A duplex microstructure with coarse complex
carbides provide a steel with high wear resistance good toughness. It is suitable to
processing stock thickness up to 3mm.
Main Application
All kinds of scissor, inlay blade and woodworking blade. High duty cutting tools (dies and
punches), long run form rolls, tube mill rolls, deep drawing tools for sheet and strip, shear
blades, circular shears, thread rolling dies, small moulds for plastic industries and
pressing tools for ceramic industries. Cold heading mould, deep drawn mould and impact
extrusion moulds.
Chemical Analysis
C % Mn % Si Cr % Mo % V % P % S %
1.***1.*0 0.**0.4 0.**0.6 *1.***2.0 0.***1.0 0.**1.0 ≤0.**5 ≤0.**5
Hardening
Hardening should be done a neutral salt bath, fluidized bed or other controlled
atmosphere furnaces. Preheat gradually to **0 to **0 ℃ then rise to *******0 ℃,
followed by air cooling. It is essential to soak at hardening temperature for ****0 minutes.
Obtainable hardness ****5 HRC.
Tempering
Tempering should be carried out immediately on completion of quenching. For maximum
hardness and abrasion resistance heat to ******0 ℃ holding at temperature 1 hour for
each *5mm section. Tempering curve given indicates typical values obtained from air
cooling from ***0 ℃. Nitriding treatment from improved retention of hardness is
recommended for certain applications.
Conventional smelt: EF+LF+VD
Delivery condition: Annealed, hardness HB ******0
Available Size
Type
Thickness
mm
Width/Diameter
mm
Length
mm
Block *****0 ******0 ********0
Round bar *****0 ********0
Treatment
Temperature
Range
Cooling/Quenching Notes
Forging ********0° F Slow.
Heat slowly and uniformly. Do not forge
below ***0°F. Cool in vermiculite or
other insulating media.
Annealing ********0° F
Cool slowly at a
rate of *5° F per
hour to ***0° F.
Protect against surface decarburization
using controlled atmosphere or by
pack-annealing.
Stress
Relieving
********0° F
Cool slowly in
furnace to **0° F.
Then in air.
Stress relieve after rough machining
Preheating ********0° F
Preheat time in furnace is ¾ Hr. per inch
of thickness. Heating up to temperature
as slow as possible
Hardening ********0° F In air.
Temper immediately after hardening.
Allow to cool to ******0° F before
tempering. Soak time is *5 minutes per
inch of thickness. Minimum of *0
minutes.
Tempering
Complete equalization of temperature
throughout the tool is essential for good
results. Double temper. Recommended
temperature is *******0° F