1.4021 Stainless hlau yog dab tsi?

1.4021 stainless hlau, feem ntau hu ua 420 los yog UNS S42000, yog siab dua - carbon martensitic stainless hlau uas muaj zog hardness thiab hnav tsis kam piv rau 410. Nrog nws cov sib npaug ntawm chromium rau corrosion kuj thiab elevated carbon rau hardenability, nws muaj peev xwm ua tau cua sov kho kom ua tau siab zog thiab 55 HRC lub tswv yim hardness, ua kom muaj zog heev thiab 55 RC surplus hardness. cov cuab yeej, thiab ntau yam khoom siv kho tshuab qhov twg ntug tuav thiab nruab nrab corrosion kuj yuav tsum tau.

 

Qhov hardenable martensitic qib no yog tus qauv raws li ntau lub tshuab thoob ntiaj teb.

Txuj	Qib sib npaug
EN (Tebchaws Europe)	1.4021
ASTM / AISI (USA)	420, UA S42000
JIS (Nyiv)	SUS420J1
KS (Korea)	STS 420

Nws muaj pes tsawg leeg yog nyob ib ncig ntawm chromium rau corrosion kuj thiab ntau dua carbon rau txhim kho hardenability thiab hnav tsis kam.

Lub ntsiab	C	Si	Mn	P	S	Cr
Cov ntsiab lus (%)	0.16 - 0.25	Tsawg dua los yog sib npaug rau 1.0	Tsawg dua los yog sib npaug li 1.5	Tsawg dua lossis sib npaug li 0.04	Tsawg dua los yog sib npaug li 0.03	12.0 - 14.0

Cov khoom siv tshuab sib txawv heev raws li kev kho cua sov (annealed vs. hardened thiab tempered).

Qhov xwm txheej	Yield zog (Rp0.2)	Tensile zog (Rm)	Elongation (A)	Hardness (HRC)
Annealed	~ 345 MPa	~ 655 MPa	~ 20%	~ 20 HRC
Hardened & Tempered	Ntau dua lossis sib npaug li 550 MPa	Ntau dua lossis sib npaug li 740 MPa	Ntau dua lossis sib npaug li 12%	50 - 55 HRC

 

Cov yam ntxwv tseem ceeb thiab kev siv ntawm 1.4021 / 420

High Hardness thiab Hnav Resistance:Nws tuaj yeem raug kho kom sov kom ua tiav qhov siab tawv (txog ~ 55 HRC), muab kev hnav zoo heev thiab ntug tuav rau kev txiav daim ntaub ntawv.

Nruab nrab Corrosion Resistance:Muab qhov tsim nyog tiv thaiv dej, tshuaj me me, cov khoom noj acids, thiab cov xwm txheej hauv huab cua, tab sis tsis haum rau cov cheeb tsam hnyav xws li marine lossis muaj zog acid.

Magnetic thiab Machinable:Muaj zog sib nqus nyob rau hauv txhua yam mob. Hauv lub xeev annealed, nws muaj kev ua haujlwm ncaj ncees, txawm tias tsawg dua qis dua - qib carbon.

Cov yam ntxwv zoo polishing:Nws tuaj yeem polished mus rau qhov ua tiav siab, ua rau nws haum rau cov cuab yeej phais thiab cov hniav cutlery.

 

Cov ntawv thov tseem ceeb:

Cutlery thiab Blades:Riam, txiab, rab chais, chav ua noj cutlery, thiab cov hniav siv.

Surgical and Dental Instruments:Forceps, clamps, scalpels, retractors, thiab cov cuab yeej kho hniav.

Industrial Components:Twj shafts, valve rooj, bearings, bushings, thiab pwm yuav tsum hnav tsis kam.

General Engineering:Hnav daim hlau, cov lus qhia, spindles, thiab lwm yam uas yuav tsum tau hardness.

Kev ua zaub mov:Cov khoom siv uas yuav tsum tau muaj kev tiv thaiv corrosion thiab hnav tsis kam.

 

Dab tsi yog cov txheej txheem kev kho cua sov rau 420 (1.4021) stainless hlau?
Cov txheej txheem koom nrogtawv: cua sov rau 980-1050 degree, tuav kom ua tiav tag nrho austenitization, ua raws li cov roj los yog cua quenching los tsim ib qho nyuaj martensitic qauv. Preheating yog pom zoo rau cov duab complex los tiv thaiv cracking. Qhov no yog ua raws litempering: reheating rau qhov kub ntawm 150-400℃(nyob ntawm seb qhov xav tau hardness / toughness tshuav nyiaj li cas) los txo cov kev ntxhov siab sab hauv thiab ua tiav cov khoom siv kho tshuab kawg. Cov cua kub qis (150-250 degree) tawm los siab tshaj plaws hardness (55-58 HRC) nrog qis toughness; Qhov kub siab dua (350-400 degree) nce toughness nrog qee qhov txo qis hauv hardness (50-52 HRC). Tempering ntawm 425-550℃feem ntau zam vim yog tempered martensite embrittlement.Annealingyog ua nyob rau ntawm 830-900℃nrog qeeb cub cua txias kom soften cov khoom rau machining.

 

420 stainless hlau piv rau 440C li cas ntawm kev ua tau zoo?
Ob leeg yog martensitic cutlery steels, tab sis 440C muaj cov pa roj carbon ntau dua (0.95-1.20%) thiab chromium (16-18%), tso cai rau nws kom ua tiav qhov siab tshaj plaws hardness (txog 62 HRC) thiab me ntsis corrosion kuj zoo dua . 420 yog suav tias yog "softer" martensitic toughness nyob rau hauv lub xeev qis dua, zoo dua cov qib matensitic. tus nqi. 440C yog siv rau high-end riam, pob bearings, thiab daim ntaub ntawv uas qhov siab tshaj plaws hnav tsis kam yog ib qho tseem ceeb, thaum 420 yog siv rau cov hom phiaj dav dav, cov cuab yeej phais, thiab cov ntawv thov qhov sib npaug ntawm hardness, toughness, thiab corrosion kuj txaus.

 

Nrhiav kev ntseeg siab ntawm 1.4021 / 420 Stainless Hlau?
GNEE Steel muab ntau yam 420 (1.4021) martensitic stainless hlau nyob rau hauv bar, hlau, ntawv, sawb, thiab phaj daim ntawv, muaj nyob rau hauv annealed los yog tshav kub-kho tej yam kev mob kom tau raws li tej yam hardness thiab lub zog yuav tsum tau. Peb muab cov ntaub ntawv pov thawj tag nrho (EN 10204 3.1) thiab kev txhawb nqa suav nrog kev txiav, machining, thiab kev kho cua sov. Yog tias koj muaj kev xav tau, thov koj xav tiv tauj peb.