20 irin - Mechanical-ini - Kemikali tiwqn

Ipele:20 irin
Iwọnwọn:GB/T 699-1999

abuda
Kikankikan jẹ kekere kan ti o ga ju 15 irin, ṣọwọn quenching, ko si temper brittleness tutu abuku plasticity ga gbogboogbo fun atunse calender flanging ati ju alurinmorin, gẹgẹ bi awọn aaki alurinmorin ati resistance alurinmorin ti o dara iṣẹ alurinmorin, alurinmorin nigbati awọn sisanra jẹ kekere, ti o muna irisi tabi apẹrẹ ti awọn ẹya eka ti o ni itara lati kiraki lori gige ipo machining ti iyaworan tutu tabi deede ipo annealing ti o dara ni gbogbogbo ti a lo ninu iṣelọpọ agbara kii ṣe nla ati giga. lile
Irin naa jẹ ti ohun elo carbon carbon kekere ti o ga, irin ti o tutu, irin alagbara, irin naa ni agbara kekere, lile lile, ṣiṣu ati weldability, agbara fifẹ ti 355-500mpa, oṣuwọn elongation ti 24%
Normalizing le ṣe igbelaruge spheroidization ti irin, ṣe atunṣe bulọọki nla proeutectoid ferrite, ati ilọsiwaju iṣẹ gige ti awọn ofo kere ju 160HBS
Ọna ọna ẹrọ tiirinkú awọn ẹya ara ni: awọn simẹnti forging kú òfo annealing ẹrọ ti o ni inira machining tutu extrusion igbáti recrystallization annealing ẹrọ itanran machining carburizing quenching tempering lilọ polishing ijọ.

https://www.shdhforging.com/news/20-steel-mechanical-properties-chemical-composition

kemikali tiwqn
C: 0.17% ~ 0.24%
Si: 0.17% ~ 0.37%
Mn: 0.35% ~ 0.65%
S: 0.035%
P: 0.035%
Kr: 0.25%
Ni: 0.25%
Kú: 0.25
darí ohun ini
Agbara fifẹ B (MPa): ≥410(42)
Agbara ikore S (MPa): ≥245(25)
Ilọsiwaju 5 (%): ≥25
Idinku awọn aaye agbegbe (%): 55 tabi diẹ ẹ sii
Lile: ko ṣe itọju ooru,≤156HB
Iwọn apẹẹrẹ: Iwọn apẹẹrẹ: 25mm

miiran alaye

Ooru itọju sipesifikesonu: normalizing,910 ℃, air itutu.

Ilana Metallographic: ferrite + pearlite.
Ooru itọjuti irin 20 ati quenching líle ti irin No. 20:
Ooru itọju ti irin 20: Fun 20 irin, o jẹ ṣee ṣe lati se aseyori awọn deede quenching líle ti 30-35HRC.Nitori awọn alapapo otutu jẹ ti o ga, awọn quenching abuku ni o tobi.Wo:
1. Lẹhin ti o ni inira machining, awọn workpiece ti wa ni quenched bi kan gbogbo nipa ooru itọju (920 ℃ quenched brine), ati ki o processing.Due si awọn líle ibeere ti 30-35HRC, gbogbo awọn ilana yẹ ki o wa ni anfani lati lọwọ, ohunkohun siwaju sii ju itanran inu. ati ita awọn ọkọ ayọkẹlẹ Circle, titunṣe keyway.
2. Kanna ti o ni inira machining, akojọpọ iho dada quenching tabi nikan tabili quenching keyway (da lori awọn iwọn ti awọn workpiece), ati nipari pari.
3. Carburizing ati quenching, lilọ iho inu ati ọna bọtini.
Sisan ilana jẹ keji, kẹta ati julọ.
● Ifijiṣẹ ipo: ifijiṣẹ ni ipo ti ko si itọju ooru tabi itọju ooru (annealing, normalizing or high temperature tempering) .Ifijiṣẹ ni ipo ti itọju ooru yoo jẹ itọkasi ni adehun. Ti ko ba tọka si, ifijiṣẹ yoo ṣee ṣe laisiitọju ooru.


Akoko ifiweranṣẹ: Oṣu Kẹwa 15-2020

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