CARRS DC53

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DC53 from DAIDO

UNIQUE CHARACTERISTICS

Higher hardness (62-63 HRc) than D2 after heat treatment.
Twice the toughness of D2 with superior wear resistance.
20% higher fatigue strength than D2.
Smaller primary carbides than D2 protect the die from chipping and cracking.
Secondary refining process (DLF) reduces impurities.
Machines and grinds up to 40% faster than D2.
Less residual stress after wire EDMing.

TYPICAL APPLICATIONS

Plastic Moulds

Stepped punch and press-punching dies

Concrete sprayer parts, rotor plates

Swaging dies and backers

Dies for cold forging

Thread-rolling circular dies

Piercing punch

Thread-rolling dies for heat-treated bolts

Forming dies

Stripper plates for lead frame blanking

Gauges

Screws for injection moulding machines

WELDING

Lower minimum pre- and post-heating temperature than D2 reduces the incidence of weld cracking and simplified welding. Low hardness decline in heat affected zone minimises any deterioration in die performance.

HEAT TREATMENT

HARDENING
Pre-heat to 300-400^oC and then to 800-850^oC allowing sufficient time to equalise. Raise to 1,020-1,040^oC and allow soaking time according to the chart below.

Maximum section (mm)	Soaking time (mins)
5	5-8
10	8-10
20	10-15
30	15-20
50	20-25
100	30-40

QUENCHING
Ideally, quench rapidly in Nitrogen in a vacuum furnace interrupting at 500^oC to allow equalisation. Alternatively, quench in salt at 500^oC followed by air cooling.

TEMPERING
Double temper according to the hardness and toughness graphs opposite. As with D2, a third temper at 400^oC should be carried out to avoid any chance of delayed grain growth and distortion.

SURFACE TREATMENTS
Surface treatments such as CVD, PVD, TD and Nitriding require the use of relatively high processing temperatures. While this can be a problem with standard D2, the higher through hardness of DC53 at elevated temperatures will allow these surface treatments to be used successfully. Further technical data is available on request.

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