Stainless hlau 420: Siab -Carbon Martensitic Alloy Rau Precision Txiav cuab yeej

Stainless hlau 420 yog qib siab -carbon martensitic qib nrog superior ntug tuav thiab hardness, ua rau nws tus qauv cov ntaub ntawv rau kev cutlery, phais scalpels, thiab siab - coj precision Cheebtsam. Nws 12-14% chromium cov ntsiab lus muab kev txhim kho corrosion yooj yim, thaum nws cov ntsiab lus siab carbon ua kom tawv tawv heev ntawm kev kho cua sov.

Tshuaj muaj pes tsawg leeg (Key, % per ASTM A240)

Cov pa roj carbon (C): 0.15-0.40

Chromium (Cr): 12.00–14.00

Manganese (Mn): Tsawg dua lossis sib npaug rau 1.00

Silicon (Si): Tsawg dua lossis sib npaug rau 1.00

Mechanical Properties (Kub-Kho)

Tensile Strength: Ntau dua lossis sib npaug li 760 MPa

Yield zog: Ntau dua los yog sib npaug rau 550 MPa

Elongation hauv 50mm: Ntau dua lossis sib npaug li 12%

Hardness: Txog 50 HRC (kub-kho)

Kev Ua Haujlwm Zoo

Exceptional Edge Retention: Hardened carbides khaws sharpness rau tej cuab yeej.

High Wear Resistance: Outperforms 410 nyob rau hauv daim ntawv thov yuav tsum tau khawb thiab abrasion tiv thaiv.

Khoom noj khoom haus -Safe Compatibility: Ua tau raws li FDA cov qauv rau kev siv chav ua noj thiab kev kho mob.

Daim ntawv thov

Premium chav ua noj riam thiab txiab

Kev phais scalpels thiab cov cuab yeej kho hniav

Valve rooj thiab pwm cores

Qib sib npaug

EN 1.4021, JIS SUS420J1 / J2, DIN X20Cr13 / X30Cr13

5 Cov Lus Nug & Cov Lus Teb

Dab tsi muab 420 nws superior ntug tuav piv rau 410?420's siab dua cov ntsiab lus carbon (0.15–0.40%) yog tus thawj tsav tsheb ntawm nws ntug tuav. Thaum kho cua sov, cov pa roj carbon sib xyaw nrog chromium los tsim cov chromium carbide tuab uas tau tawg thoob plaws hauv cov hlau cov microstructure. Cov carbides nyuaj no ua los tiv thaiv kev hnav, tiv thaiv kev txiav ntug ntawm dulling thaum sib cuag nrog cov ntaub ntawv tawv zoo li cov nqaij los yog ntaub . 410, nrog cov pa roj carbon qis, ua rau cov carbides tsawg dua, yog li nws cov ntug hnav sai dua, ua rau nws tsis tsim nyog rau kev txiav cov cuab yeej. Cov carbides kuj txhim kho 420's khawb tiv thaiv, ua kom cov hniav zoo nkauj tshiab ntev dua 410 qhov sib npaug.

Dab tsi yog qhov txawv ntawm 420J1 thiab 420J2 subtypes?420J1 muaj qis dua cov pa roj carbon ntau (0.15-0.25%) thiab yog cov ductile ntau dua, ua kom yooj yim rau hauv cov duab nkhaus xws li cov txiab hauv chav ua noj lossis cov hniav cuav. Nws tuaj yeem ua rau 40-45 HRC, sib npaug hardness nrog formability rau cov cuab yeej nyuaj. 420J2 muaj cov ntsiab lus carbon ntau dua (0.25–0.40%) thiab ua tiav qhov siab tshaj plaws ntawm 50 HRC, ua rau nws zoo tagnrho rau hnyav- cov cuab yeej txiav xws li rab riam tua tsiaj thiab cov cuab yeej ua haujlwm. Ob hom subtypes sib koom tib yam 12-14% chromium cov ntsiab lus, yog li lawv cov kev tiv thaiv corrosion yog ze li zoo tib yam, tab sis J2 cov pa roj carbon ntau dua ua rau nws tsis tshua muaj weldable thiab ntau dua rau brittleness yog tias tsis zoo tempered.

420 puas tuaj yeem welded, thiab yuav tsum tau ceev faj dab tsi?Vuam 420 yog ua tau tab sis nyuaj vim nws cov ntsiab lus carbon siab thiab cov qauv martensitic. Cov hlau yog nquag ua kom txias txias hauv thaj tsam weld, raws li qhov txias sai sai tom qab vuam cov ntaub ntawv nyuaj, brittle martensite tsis muaj sijhawm rau tempering. Txhawm rau tiv thaiv qhov no, preheat lub hauv paus hlau mus rau 200-300℃ua ntej vuam, siv qis- cua sov input (slow mus txawv tebchaws speeds thiab tsis tshua muaj tam sim no) kom txo tau tshav kub- cuam tshuam cheeb tsam (HAZ) loj, thiab tam sim ntawd temper lub welded ib feem ntawm 250-300℃kom soften lub HAZ . 410 sau cov hlau los yog tuab 4. nqe 420j2 yuav tsum tau zam rau welding vim lawv txoj kev pheej hmoo tawg.

Puas yog 420 haum rau daim ntawv thov kev sib cuag zaub mov, thiab yuav ua li cas tswj nws?420 yog FDA- pom zoo rau kev sib cuag zaub mov thiab tau dav siv rau cov riam hauv chav ua noj thiab cov khoom ua zaub mov vim tias nws qhov chaw du tiv thaiv kab mob thiab nws cov chromium oxide txheej fends tawm corrosion los ntawm cov khoom noj acidic xws li citrus thiab txiv lws suav. Txhawm rau tswj nws qhov kev ua tau zoo, 420 cov cuab yeej yuav tsum tau siv tes- ntxuav thiab qhuav tam sim ntawd tom qab siv los tiv thaiv cov dej thiab xeb- tsis zoo li austenitic 304, 420 yuav tsim teeb pom kev xeb yog tias sab laug ntub dej rau lub sijhawm ntev. Qee lub sij hawm polishing nrog lub tshuab ntxhua khaub ncaws stainless hlau yuav rov ua kom nws ci thiab ntxiv dag zog rau cov txheej txheem oxide tiv thaiv, ncua lub cuab yeej kev pab cuam lub neej los ntawm xyoo.

Vim li cas 420 nyiam tshaj 304 rau pwm thiab cov khoom tuag?Pwm cores thiab cov khoom siv tuag yuav tsum muaj qhov tawv tawv los tiv thaiv kev hnav los ntawm cov yas rov qab los yog hlau txhaj tshuaj, thiab 420 muab qhov no thaum tshav kub kub-kho rau 45-50 HRC-txog 304 qhov siab tshaj 217 HB. 420 kuj muaj qhov zoo ntawm qhov ruaj khov tom qab kev kho cua sov, ua kom muaj qhov zoo sib xws. Thaum 304 yog corrosion ntau dua -resistant, nws tsis muaj lub hardness thiab hnav tsis kam rau lub sij hawm ntev pwm kev pab cuam, thiab nws tsis tuaj yeem ua cua sov- kho kom ntxiv dag zog rau thaj chaw tseem ceeb. 420 lub peev xwm los tiv thaiv kev sib cuag siab thiab khaws nws cov duab ua rau nws txoj kev xaiv ntau dua rau kev tsim pwm, txawm tias nws qis dua corrosion kuj.