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H13 1.2344 SKD61

Početna>Proizvodi>Čelici za vruće radne alate>H13 1.2344 SKD61

H13 1.2344 SKD61 ravna šipka

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Specifikacije

H13 Tool Steel is a versatile chromium-molybdenum hot work steel that is widely used in hot work and cold work tooling applications. The hot hardness (hot strength) of H13 resists thermal fatigue cracking which occurs as a result of cyclic heating and cooling cycles in hot work tooling applications. Because of its excellent combination of high toughness and resistance to thermal fatigue cracking (also known as heat checking) H13 is used for more hot work tooling applications than any other tool steel.

Because of its high toughness and very good stability in heat treatment, H13 is also used in a variety of cold work tooling applications. In these applications, H13 provides better hardenability (through hardening in large section thicknesses) and better wear resistance than common alloy steels such as 4140.

Also available as Electro-Slag-Remelted (ESR) and Vacuum-Arc-Remelted (VAR) products as well. The remelting processes provide improved chemical homogeneity, refinement of carbide size, and the associated improvements in mechanical properties and fatigue properties.

PRIJAVE:Inserts, cores, and cavities for die casting dies, die casting shot sleeves, hot forging dies, extrusion dies, and plastic mold cavities and components that require high toughness and excellent polishability.

SASTAV

C

Mn

Si

Cr

Mo

V

0.40

0.40

1.00

5.25

1.35

1.00


Toplotna provodljivost

Temperatura︒F

Btu/hr-ft︒F

Temperatura︒C

W/m︒C

80

10.17

27

17.6

400

13.52

204

23.4

800

14.5

427

25.1

1200

15.49

649

26.8

FIZIČKE SVOJINE

· Gustina: 0.280 lb/in3 (7750 kg/m3)

· Specifična težina: 7.75

· Obradivost: 65-70% 1% ugljeničnog čelika

Modul elastičnosti

Temp︒F

Modulus psi×10-6

Temp︒C

Modulus Gpa

70

30.0

21

206.8

200

29.0

93

199.9

400

27.0

204

186.2

600

28.5

316

196.5

800

27.5

427

189.6

1000

23.0

538

158.6

 

Koeficijent toplinske ekspanzije (47-48 HRC)

Temperatura︒F

in/in︒F×10-6

Temperatura︒C

mm/mm︒C×10-6

80-200

5.8

21-93

10.4

80-400

6.3

21-204

11.3

80-800

6.9

21-316

12.4

80-1200

7.3

21-427

13.1

80-1500

7.5

21-538

13.


1492431268787984


UPUTSTVO ZA TOPLINSKU OBRADU

KALJIVANJE

KRITIČNA TEMPERATURA:

Ac1: 1544°F (840 ℃)

Ac3: 1634°F (890 ℃)

AR1: 1475°F (802 ℃)

AR3: 1418°F (826 ℃)

Predgrevanje: Da biste smanjili izobličenje u složenim alatima, koristite dvostruko predgrijavanje. Zagrijati brzinom koja ne prelazi 400°F na sat (222°C na sat) na 1150-1250°F (621-677°C), izjednačiti, zatim povećati na 1500-1600°F (816-871°C) i izjednačiti. Za normalne alate, koristite samo drugi temperaturni raspon kao jedan tretman predgrijavanja.

Austenitizing (High Heat): Heat rapidly from the preheat. Furnace or Salt: 1800-1890°F (982-1032°C) For maximum toughness, use 1800°F (982°C) For maximum hardness and resistance to thermal fatigue cracking and wear use 1890 (1032°C). Soak at temperature for 30 to 90 minutes.

Gašenje: Vazduh, gas pod pritiskom ili toplo ulje. Debljine profila do i uključujući 5 inča (127 mm) obično će se potpuno stvrdnuti kada se ohlade na mirnom zraku iz tretmana austenitizacije. Sekcije veće od 5 inča (127 mm) u debljini će zahtijevati ubrzano hlađenje korištenjem prisilnog zraka, plina pod pritiskom ili prekinutog gašenja ulja kako bi se postigla maksimalna tvrdoća, žilavost i otpornost na pucanje zbog termičkog zamora.

Za gašenje plinom pod pritiskom, minimalna brzina gašenja od približno 50°F u minuti (28°C u minuti) do ispod 1000°F (538°C) je potrebna da bi se postigla optimalna svojstva čelika.

Za ulje, gasite dok ne pocrni, oko 900°F (482°C), a zatim ohladite na mirnom vazduhu na 150-125°F (66-51°C).

Kaljenje: Temper immediately after quenching. The typical tempering range is 1000-1150°F (538-621°C). Hold at the tempering temperature for 1 hour per inch (25.4mm) of thickness, but for 2 hours minimum, then air cool to ambient temperature. Double tempering is required. To maximize toughness and tool performance, a third temper is often used as a stress relief after all finish machining, grinding, and EDM work are completed on the tool.

ANNEALING

Žarenje se mora izvesti nakon vruće obrade i prije ponovnog kaljenja.

Heat at a rate not exceeding 400°F per hour (222°C per hour) to 1575-1625°F (857-885°C), and hold at temperature for 1 hour per inch 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 of235 HBS.


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