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D2 1.2379 SKD11

Inici>Productes>Eines de treball en fred>D2 1.2379 SKD11

D2 1.2379 SKD11 barra plana

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Especificacions
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.

APLICACIONS: Rotlles, punxons, matrius per tallar, conformar, retallar i enrotllar fils, ganivets de cisalla, ganivets de processament d'aliments i calibres.

COMPOSICIÓ

C

Mn

Si

Cr

Mo

V

1.50

0.30

0.30

12.00

0.75

0.90


PROPIETATS RELATIVES

1492431879960282

Coeficient d’expansió tèrmica (58-59 HRC)

Temperatura︒F

in/in︒F×10-6

Temperatura︒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

PROPIETATS FÍSIQUES

· Densitat: 0.278 lb/in3 (7695 kg/m3)

· Gravetat específica: 7.70

· Mòdul d'elasticitat: 30 x 106 psi (207GPa)

· Mecanització: 50-60% d'un 1% d'acer al carboni

1492431918971275

INSTRUCCIONS DE TRACTAMENT DE LA CALOR

ENDURAMENT

TEMPERATURA CRÍTICA :

Ac1: 1449 ℃)

Ac3: 1553 ℃)

AR1: 1418 ℃)

AR3: 1373 ℃)

Precalentament: 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.

Austenititzant (calor alt): 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).

Temperament: 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 obtenir la màxima resistència al desgast, tempereu entre 300 i 350 °F (149-177 °C) per a una duresa de 62-64 HRC. Per obtenir un equilibri òptim entre la resistència al desgast i la duresa, tempereu entre 500 i 550 °F (260-288 °C). Això produirà 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.

Recuit: 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.

ArticleDimensió (mm)procésCondició d’entrega
Barra RodonaDIA1.0 - 30Estirat en fred / Mòlta sense centresBrillant i Recuit
DIA20 - 80peelingBrillant i Recuit
DIA 13-180Enrotllat en calentSuperfície negra i recuit
DIA 70 - 400Enrotllat en calentSuperfície negra i recuit
Barra planaT 3.0-20 XW 20-100Enrotllat en calentSuperfície negra i recuit
BloquejarT 20-200 X 300-800Laminat en calent i forjat en calentSuperfície negra / Màquina i recuit
Rodet de filferroDIA 5.5 - 13Enrotllat en calentSuperfície negra i recuit
FullesT1.0 - 2.5Enrotllat en fredSuperfície negra i recuit
T 2.5 - 8.0Enrotllat en calentSuperfície negra i recuit
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