Stainless hlau 431: Siab -Strength Martensitic Qib rau Kev Thov Kev Pabcuam

Dab tsi yog Stainless Hlau 431

Stainless hlau 431 yog qib martensitic nrog sib xyaw martensitic -ferritic microstructure thiab 15 mus rau 17 feem pua ​​chromium ntxiv rau 1.25 rau 2.5 feem pua ​​​​nickel. Cov npib tsib xee ntxiv txhim kho corrosion kuj thiab toughness thaum lub martensitic theem muab lub zog siab, sau qhov sib txawv ntawm cov qib martensitic qib xws li 410 thiab austenitic qib xws li 304.

Tshuaj muaj pes tsawg leeg

Cov kev txwv tseem ceeb ntawm ASTM A240 yog carbon 0.20 feem pua ​​​​siab tshaj plaws, chromium 15.00 txog 17.00 feem pua, npib tsib xee 1.25 txog 2.50 feem pua, thiab manganese 1.00 feem pua ​​​​siab tshaj. Qhov siab dua chromium thiab npib tsib xee cov ntsiab lus muab kev tiv thaiv corrosion zoo dua li 410 lossis 420.

Mechanical Properties

Thaum tshav kub kub- kho mob 431 muaj qhov tsawg kawg nkaus tensile lub zog ntawm 725 MPa, qhov tsawg kawg nkaus yield zog ntawm 515 MPa, thiab qhov tsawg kawg nkaus elongation ntawm 15 feem pua, nrog hardness txog 285 HB annealed thiab mus txog 45 HRC tom qab hardening. Kev sib xyaw ua ke ntawm lub zog thiab qaug zog ua haujlwm haum rau siab - kev ntxhov siab rotating thiab reciprocating Cheebtsam.

Kev kho cua sov

Annealing ntawm 800 mus rau 900 ° C nrog qeeb txias softens cov hlau rau fabrication. quenching los ntawm 950 mus rau 1050 degrees C hauv dej ua ntxiv martensite rau lub zog, thiab tempering ntawm 200 mus rau 600 degrees C tailors lub zog: tempering ze 300 degrees C muab 40 mus rau 45 HRC rau valve stems, thaum tempering nyob ze 600 degrees C txo hardness mus txog 30 HRC toughness thiab boost.

Vuam

Vuam 431 yuav tsum tau saib xyuas kom khaws cov qauv thiab tsis txhob martensite embrittlement nyob rau hauv tshav kub- cuam tshuam cheeb tsam. Preheat rau 150 mus rau 250 ° C, siv cov cua kub qis nrog TIG nyiam, thiab kub siab tom qab vuam ntawm 250 mus rau 300 ° C kom mos cov cua sov- thaj tsam cuam tshuam. Kev xaiv muab tub lim yuav tsum ruaj khov rau thaj tsam weld, piv txwv li nrog ntau dua -nickel austenitic muab tub lim.

Daim ntawv thov

431 yog siv rau kev tsav tsheb tsav tsheb, cov khoom siv dav hlau xws li tsaws iav qhov chaw thiab tswj cov pas nrig, lub twj tso kua mis, lub tog raj kheej, fasteners, thiab siab - cov khoom siv zog uas yuav tsum tau muaj kev tiv thaiv corrosion rau txoj kev ntsev, noo noo, thiab cov kua qaub me me. Cov qib sib npaug suav nrog EN 1.4057, JIS SUS431, thiab DIN X2CrNi17-2.

Cov lus nug nquag

Q: Qhov muaj pes tsawg leeg ntawm 431 yog dab tsi?

A: 15 mus rau 17% chromium thiab 1.25 mus rau 2.5 feem pua ​​​​nickel.

Q: Lub zog tensile ntawm 431 yog dab tsi?

A: 725 MPa yam tsawg kawg nkaus.

Q: 431 piv nrog 410 li cas?

A: Ntau dua chromium thiab npib tsib xee muab kev tiv thaiv corrosion zoo dua.

Q: 431 puas tuaj yeem welded?

A: Yog, nrog preheat, tsis tshua muaj cua sov input, thiab post-weld tempering.

Q: Dab tsi hardness tuaj yeem ncav cuag 431?

A: Txog li 45 HRC.

Q: Cov ntawv thov twg siv 431?

A: Tsav shafts, aircraft Cheebtsam, valve stems, thiab fasteners.

Tiv tauj peb rau 431 stainless hlau tuav, forgings, thiab shafts nrog ntawv pov thawj kev kho cua sov thiab cov khoom.