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D2 1.2379 SKD11

Home>Products>Acciaiu di Strumenti di travagliu à Fretu>D2 1.2379 SKD11

D2 1.2379 SKD11 flat bar

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D2 Tool Steel is a versatile high-carbon, high-chromium, air-hardening tool steel that is characterized by a relatively high attainable hardness and numerous, large, chromium-rich alloy carbides in the microstructure. These carbides provide good resistance to wear from sliding contact with other metals and abrasive materials. Although other steels with improved toughness or improved wear resistance are available, D2 provides an effective combination of wear resistance and toughness, tool performance, price, and a wide variety of product forms. Also available as an Electro-Slag-Remelted (ESR) product. The remelting process provides improved chemical homogeneity, refinement of carbide size, and the associated improvements in mechanical and fatigue properties.

TIPI: Rotoli, punzoni, fustelle per tranciatura, formatura, rifilatura e laminazione di filettature, coltelli da cesoia, coltelli per l'alimentazione e calibro.

COMPOSITION

C

Mn

Si

Cr

Mo

V

1.50

0.30

0.30

12.00

0.75

0.90


PROPRIETÀ RELATIVE

1492431879960282

Coefficient of Thermal Expansion (58-59 HRC)

Température ︒F

in/in︒F×10-6

Température ︒ C

mm/mm︒C×10-6

100-500

5.71

38-260

10.3

100-800

6.63

38-427

11.9

100-1000

6.82

38-538

12.3

100-1200

6.83

38-649

12.3

100-1500

6.9

38-816

12.4

PROPRIETÀ FISICHE

· Densità: 0.278 lb/in3 (7695 kg/m3)

· Gravità Specifica: 7.70

· Modulu d'elasticità: 30 x 106 psi (207GPa)

· Machinability: 50-60% di un 1% acciaio carboniu

1492431918971275

ISTRUZIONI DI TRATTAMENTO CALORE

DURRITURA

TEMPERATURA CRITICA :

Ac1: 1449 ° F (788 ℃)

Ac3: 1553 ° F (845 ℃)

AR1: 1418 ° F (769 ℃)

AR3: 1373 ° F (744 ℃)

Priscaldamentu: To minimize distortion and stresses in large or complex tools use a double preheat. Heat at a rate not exceeding 400°F per hour (222°C per hour) to 1150-1250°F (621-677°C) equalize, then heat to 1400-1450°F (760-788°C). For normal tools, use only the second temperature range as a single preheating treatment.

Austenitizing (High Heat): Heat slowly from the preheat. Furnace or Salt: 1850-1875°F (1010-1024°C).

Quenching: Air or pressurized gas to 150-125ºF (66-51ºC). Sizes up to 4 inches (101.6 mm) in thickness will through harden when air cooled from 1575ºF (857ºC). Sizes up to 6 inches (152.4 mm) in thickness will through harden when air cooled from 1625ºF (885ºC).

Temperatura: Temper immediately after quenching. Hold at temperature for 1 hour per inch (25.4 mm) of thickness, 2 hours minimum, then air cool to ambient temperature. The typical tempering range is 350 to 400ºF (177 to 204ºC).

Per a massima resistenza à l'usura, temperate trà 300-350 ° F (149-177 ° C) per una durezza di 62-64 HRC. Per l'equilibriu ottimale trà a resistenza à l'usura è a tenacità, temperate trà 500-550 ° F (260-288 ° C). Questu pruducerà 58-60 HRC.

For maximum toughness, double temper, 2 hours plus 2 hours, at temperatures above 950°F (510°C). This will produce hardness of less than 58 HRC.

To minimize internal stresses in cross sections greater than 6 inches (152.4 mm) and to improve stability in tools that will be EDM'd after heat treatment, soaking times of 4 to 6 hours at the tempering temperature below 950°F (510°C) are strongly recommended.

Annealing: Annealing must be performed after hot working and before re-hardening. Heat at a rate not exceeding 400°F per hour (222°C per hour) to 1600-1650°F (871-899°C), and hold at temperature for 1 hour per inch (25.4mm) of maximum thickness; 2 hours minimum. Then cool slowly with the furnace at a rate not exceeding 50°F per hour (28°C per hour) to 1000°F (538°C). Continue cooling to ambient temperature in the furnace or in air. The resultant hardness should be a maximum of 255 HBW.

ItemDimensioni (mm)prucessuCundizione di consegna
Ronda BarDIA 1.0 - 30Disegnu à fretu / rettifica senza centruBright & Anneal
DIA 20 - 80sbucciaturaBright & Anneal
DIA 13-180Rolled HotSuperficie nera & Anneal
DIA 70 - 400Rolled HotSuperficie nera & Anneal
Pianu BarT 3.0-20 XW 20-100Rolled HotSuperficie nera & Anneal
BloccuT 20-200 X 300-800Laminato a caldo e forgiato a caldoSuperficie nera / Machine & Anneal
Rod RodDIA 5.5 - 13Rolled HotSuperficie nera & Anneal
FullesT1.0 - 2.5Ghjuvatu fridduSuperficie nera & Anneal
T 2.5 - 8.0Rolled HotSuperficie nera & Anneal
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