1.4125 Stainless hlau yog dab tsi?

1.4125 stainless hlau, feem ntau hu ua 440C los yog UNS S44004, yog siab -carbon, siab -chromium martensitic stainless hlau muaj npe nrov rau kev ua tiav qhov siab tshaj plaws hardness thiab hnav tsis kam ntawm cov qauv stainless hlau qib. Nws yog dav siv rau cov ntawv thov uas yuav tsum tau muaj zog heev thiab nruab nrab corrosion kuj, xws li siab -kawg bearings, precision riam, cov cuab yeej phais, thiab cov khoom siv valve.

 

Qhov kev hwm no siab tshaj - qib hardness martensitic yog tus qauv raws li cov txheej txheem thoob ntiaj teb tseem ceeb.

Txuj	Qib sib npaug
EN (Tebchaws Europe)	1.4125
ASTM / AISI (USA)	440C, UA S44004
JIS (Nyiv)	SUS 440 C
KS (Korea)	STS 440 C

Nws cov ntsiab lus carbon thiab chromium siab yog qhov tseem ceeb rau nws qhov hnyav hnyav thiab hnav tsis kam.

Element	C	Si	Mn	P	S	Cr	Mo
Cov ntsiab lus (%)	0.95 - 1.20	Tsawg dua los yog sib npaug rau 1.0	Tsawg dua los yog sib npaug rau 1.0	Tsawg dua los yog sib npaug li 0.04	Tsawg dua lossis sib npaug li 0.03	16.0 - 18.0	0.4 - 0.8

Nws ua tau zoo heev hardness tab sis nrog txo toughness piv rau qis dua - carbon martensitic qib.

Qhov xwm txheej	Yield zog (Rp0.2)	Tensile zog (Rm)	Elongation (A)	Hardness (HRC)
Annealed	~ 450 MPa	~ 740 MPa	~ 12%	~ 25 HRC
Hardened & Tempered	Ntau tshaj lossis sib npaug li 700 MPa	Ntau dua lossis sib npaug li 850 MPa	Ntau dua lossis sib npaug li 2%	58 - 62 HRC

 

Cov yam ntxwv tseem ceeb thiab kev siv ntawm 1.4125 / 440C

Hardness thiab hnav tsis kam:Muaj peev xwm ncav cuag qib hardness mus txog 62 HRC, muab kev tiv thaiv kev puas tsuaj thiab ntug tuav.

Nruab nrab Corrosion Resistance:Muaj kev tiv thaiv corrosion zoo dua li ntau cov cuab yeej steel vim nws cov ntsiab lus chromium siab, tab sis tsis haum rau cov cheeb tsam hnyav xws li marine lossis tshuaj lom neeg.

Sib nqus thiab Brittle:Muaj zog sib nqus thiab tuaj yeem nkig nyob rau hauv tag nrho lub xeev hardened, yuav tsum tau ceev faj tempering kom sib npaug hardness thiab toughness.

 

Cov ntawv thov tseem ceeb:

Bearings:Pob thiab cov menyuam bearings rau precision ntsuas, aerospace, thiab cov cuab yeej kho mob.

Cutlery thiab Blades:High- riam kawg, phais scalpels, thiab cov hniav siv.

Valve Cheebtsam:Cov rooj zaum, pob, thiab stems nyob rau hauv siab - hnav daim ntaub ntawv.

Nozzles thiab Wear Parts:Cheebtsam raug rau abrasive tej yam kev mob nyob rau hauv manufacturing thiab ua.

 

Dab tsi yog qhov txawv ntawm 440C (1.4125) thiab 440B (1.4112)?
Qhov sib txawv tseem ceeb yog cov ntsiab lus carbon: 440C muaj 0.95–1.20% C, thaum 440B muaj 0.75–0.95% C. Cov pa roj carbon ntau dua no tso cai rau 440C kom ua tiav qhov siab tshaj plaws hardness (txog 62 HRC vs. ~ 58 HRC rau 440B) thiab hnav zoo dua, tab sis ntawm tus nqi ntawm kev siv zog ntau dua 12 }C rau qhov siab tshaj plaws hardness yog qhov tseem ceeb, thaum 440B muab qhov sib npaug zoo dua ntawm hardness thiab toughness.

 

Dab tsi yog cov txheej txheem kev kho cua sov rau 440C stainless hlau?
Yuav kom ua tiav qhov siab tshaj plaws hardness, 440C feem ntau yogaustenitizedntawm 1010-1065 degree, ua raws liroj quenching. Nws yog ceskub siabntawm qhov kub ntawm 150-370 degree, feem ntau nrog ntau lub voj voog tempering kom ntseeg tau tias muaj kev ntxhov siab thiab qhov ruaj khov. Lower tempering kub yield hardness dua; siab dua kub txhim kho toughness tab sis txo hardness. Preheating yog pom zoo kom tsis txhob tawg thaum lub sij hawm hardening, tshwj xeeb tshaj yog rau complex los yog tuab seem.

 

Nrhiav kev ntseeg siab ntawm 1.4125 / 440C Stainless Hlau?
GNEE Steel muab cov khoom zoo siab -hardness 440C (1.4125) stainless hlau nyob rau hauv bar, hlau, thiab precision av Tshuag, muaj nyob rau hauv annealed los yog tshav kub-kho tej yam kev mob rau xav tau hnav- daim ntaub ntawv resistant. Peb muab tag nrho cov ntaub ntawv pov thawj thiab kev txhawb nqa. Yog tias koj muaj kev xav tau, thov koj xav tiv tauj peb.