H13 1.2344 SKD61 alapin igi

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.

Awọn ohun elo:Awọn ifibọ, awọn ohun kohun, ati awọn cavities fun ku simẹnti ku, kú simẹnti shot apa aso, gbona forging kú, extrusion ku, ati ṣiṣu m cavities ati irinše ti o nilo ga toughness ati ki o tayọ polishability.

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AGBARA ỌRUN

· iwuwo: 0.280 lb/in3 (7750 kg/m3)

· Walẹ pato: 7.75

· ẹrọ: 65-70% ti a 1% erogba, irin

Awọn ilana Itọju gbigbona

OLÁLÁ

Gbona: Lati dinku ipalọlọ ni awọn irinṣẹ idiju lo iṣaju ilọpo meji. Ooru ni oṣuwọn ti ko kọja 400°F fun wakati kan (222°C fun wakati kan) si 1150-1250°F (621-677°C), dọgba, lẹhinna gbe soke si 1500-1600°F (816-871°C) ati dọgbadọgba. Fun awọn irinṣẹ deede, lo iwọn otutu keji nikan bi itọju alapapo kan.

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.

Pipa: Afẹfẹ, gaasi titẹ, tabi epo gbona. Awọn sisanra apakan to ati pẹlu awọn inṣi 5 (127 mm) yoo ṣe deede ni kikun nipasẹ lile nigbati o tutu ni afẹfẹ ti o duro lati itọju astenitizing. Awọn apakan ti o tobi ju inch 5 (127 mm) ni sisanra yoo nilo itutu agbaiye nipa lilo afẹfẹ ti a fipa mu, gaasi titẹ, tabi ipaniyan epo ti o ni idilọwọ lati gba lile lile ti o pọju, lile ati atako si fifọ rirẹ gbona.

Fun piparẹ gaasi titẹ, oṣuwọn piparẹ to kere ju 50°F fun iṣẹju kan (28°C fun iṣẹju kan) si isalẹ 1000°F (538°C) ni a nilo lati gba awọn ohun-ini to dara julọ ninu irin.

Fun epo, pa a titi di dudu, ni iwọn 900°F (482°C), lẹhinna dara ni afẹfẹ ti o duro de 150-125°F (66-51°C).

Gbigbọn: Ibinu lẹsẹkẹsẹ lẹhin quenching. Iwọn iwọn otutu aṣoju jẹ 1000-1150°F (538-621°C). Mu ni iwọn otutu otutu fun wakati 1 fun inch (25.4mm) ti sisanra, ṣugbọn fun wakati 2 o kere ju, lẹhinna ṣe afẹfẹ tutu si iwọn otutu ibaramu. A nilo iwọn otutu meji. Lati mu iwọn lile ati iṣẹ-ṣiṣe ọpa pọ si, igba otutu kẹta ni a maa n lo bi iderun aapọn lẹhin gbogbo ẹrọ ṣiṣe, lilọ, ati iṣẹ EDM ti pari lori ọpa.

ANEALING

Annealing gbọdọ ṣee ṣe lẹhin iṣẹ gbona ati ṣaaju ki o to tun-lile.

Ooru ni oṣuwọn ti ko kọja 400°F fun wakati kan (222°C fun wakati kan) si 1575-1625°F (857-885°C), ki o si mu ni iwọn otutu fun wakati kan fun inch ti sisanra ti o pọju; Awọn wakati 1 kere ju. Lẹhinna dara laiyara pẹlu ileru ni oṣuwọn ti ko kọja 2°F fun wakati kan (50°C fun wakati kan) si 28°F (1000°C). Tẹsiwaju itutu agbaiye si iwọn otutu ibaramu ninu ileru tabi ni afẹfẹ. Lile abajade yẹ ki o jẹ ti o pọju 538 HBS.