1.4125 Stainless hlau yog dab tsi?

1.4125 stainless hlau, feem ntau hu ua 440C los yog UNS S44004, yog tus tswv cuab siab tshaj plaws ntawm 440 series martensitic stainless hlau. Nrog cov ntsiab lus carbon txog 1.20%, nws ua tiav qhov siab tshaj plaws hardness thiab hnav tsis kam ntawm cov qauv stainless hlau qib, muaj peev xwm ncav cuag 60-62 HRC los ntawm kev kho cua sov kom zoo. Qhov no ua rau nws cov khoom ntawm kev xaiv rau daim ntawv thov uas yuav tsum tau siab tshaj plaws hardness, zoo heev hnav tsis kam, thiab nruab nrab corrosion kuj, xws li high-end bearings, precision riam, cov cuab yeej phais, thiab valve Cheebtsam.

 

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 siab carbon thiab chromium yog qhov tseem ceeb rau nws qhov hnyav hnyav thiab hnav tsis kam, nrog molybdenum ntxiv los txhim kho cov khoom.

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 zoo dua li lwm cov hlau tsis zoo.

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 muaj tshuaj lom neeg muaj zog. Haum rau me ntsis atmospheric thiab dej tshiab.

Sib nqus thiab Hardenable:Muaj zog sib nqus thiab teb zoo rau kev kho cua sov, txawm tias cov ntsiab lus carbon siab yuav tsum tau ceev faj kom tsis txhob tawg.

Zoo Dimensional Stability:Thaum kho cov cua sov kom zoo nrog sub- xoom kev kho mob, muaj kev ruaj ntseg zoo tshaj plaws rau cov khoom muaj tseeb.

 

Cov ntawv thov tseem ceeb:

Bearings:High-precision ball bearings, roller bearings, racers, and thrust washers for instruments, aerospace, and medical devices.

Cutlery thiab Blades:High- riam kawg, phais scalpels, cov hniav siv, thiab txiab uas yuav tsum tau ceev tshaj plaws.

Valve Cheebtsam:Rooj zaum, pob, stems, thiab trim nyob rau hauv siab - hnav daim ntaub ntawv nrog me me corrosive media.

Nozzles thiab Orifices:Cheebtsam raug rau cov kua abrasive los yog siab -Veocity particulate matter.

Cov cuab yeej ntsuas:Gauges, calipers, micrometers, thiab lwm yam cuab yeej precision yuav tsum tau hnav tsis kam.

Pwm thiab Tuag:Kev txhaj tshuaj pwm, sib sau tuag, thiab cov cuab yeej siv rau cov yas thiab lub teeb hlau.

 

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 (60-62 HRC vs . 55-58 HRC rau 440B) thiab superior hnav tsis kam, tab sis ntawm tus nqi qis dua 1} rau brittleness tseem yuav tsum tau ua tib zoo kho cua sov kom tsis txhob tawg thiab muaj kev tiv thaiv corrosion tsawg dua vim muaj nag lossis daus ntau dua carbide. 440C yog xaiv rau cov ntawv thov uas qhov siab tshaj plaws hardness thiab hnav tsis kam yog qhov tseem ceeb, thaum 440B muaj qhov sib npaug zoo dua ntawm hardness thiab toughness rau cov ntawv thov tsawg dua.

 

Dab tsi yog cov txheej txheem kev kho cua sov rau 440C stainless hlau?
Yuav kom ua tiav qhov siab tshaj plaws hardness, 440C yuav tsum tau ceev faj kev kho cua sov.Austenitizingntawm 1010-1065 degree, nrog preheating ntawm 760-815℃qhov tseem ceeb los tiv thaiv thermal shock thiab tawg. Soak lub sij hawm yuav tsum txaus kom yaj carbides tab sis tsis dhau ntau dhau kom tsis txhob muaj cov qoob loo loj hlob.Roj quenchyog ib yam, tab sis cov polymer quenchants yuav siv tau rau cov duab complex. Tam sim ntawdsub-zero kev kho mobntawm -70 mus rau -80℃yog pom zoo kom hloov cov austenite khaws cia thiab ua tiav qhov siab tshaj plaws hardness (ntxiv 1-2 HRC).Temperingntawm 150-200℃(tsawg temper) rau siab tshaj plaws hardness, los yog 230-370℃rau me ntsis qis hardness nrog txhim kho toughness. Kub ntawm 400-550℃yuav tsum tau zam vim embrittlement. Muab ob npaug rau tempering yog pom zoo rau kev daws kev ntxhov siab thiab kev ruaj ntseg. Tag nrho cov kev kho cua sov yuav tsum tau ua nyob rau hauv cov huab cua tiv thaiv kom tsis txhob decarburization.

 

Nrhiav kev ntseeg siab ntawm 1.4125 / 440C Stainless Hlau?
GNEE Steel muab tus nqi siab siab -hardness 440C (1.4125) stainless hlau nyob rau hauv bar, hlau, precision av Tshuag, sawb, thiab phaj daim ntawv, muaj nyob rau hauv annealed mob rau machining los yog ua ntej - hardened rau cov neeg siv khoom specifications. Peb muab cov ntaub ntawv pov thawj tag nrho (EN 10204 3.1) thiab kev txhawb nqa suav nrog kev txiav txiav, sib tsoo, thiab kev kho cua sov. Yog tias koj muaj kev xav tau, thov koj xav tiv tauj peb.