410 vs 420 Martensitic Stainless Steels: Weldable Strength vs Hardenable Cutting Edge

 

Dab tsi yog lawv cov ntsiab lus tseem ceeb thiab qhov sib txawv ntawm kev ua haujlwm tseem ceeb?

410 muaj 11.5–13.5% Cr thiab ≤0.15% C. Nws cov ntsiab lus carbon tsawg tso cai rau nws yuav tsum tau welded yam tsis muaj cracking thiab tshav kub kho mus rau ib tug nruab nrab hardness (txog ~ 40 HRC), ntsuas lub zog nrog toughness.420 nta 12-14% Cr thiab 0.15-0.40% hardness kho kom ntau dua cov pa roj carbon ntau dua. ~ 55 HRC), tsim kom muaj qhov tawv tawv, hnav- qhov chaw tiv taus zoo tagnrho rau kev txiav cov npoo. Ob qib yog hlau nplaum thiab tsis muaj npib tsib xee, ua rau lawv tsis tshua kim dua qib austenitic tab sis tsis tshua muaj corrosion resistant.

Yuav ua li cas lawv cov cuab yeej cuab tam haum rau cov kev siv sib txawv?

410 yog siv rau cov txheej txheem uas yuav tsum tau muaj zog thiab muaj peev xwm yuav welded, xws li twj tso kua mis, valve lub cev, thiab aircraft fittings ua hauj lwm nyob rau hauv qhuav ib puag ncig.420 yog cov khoom ntawm kev xaiv rau "nyuaj" qhov chaw uas yuav tsum tau ib tug ntse ntug los yog tsis kam mus abrasion, xws li riam hniav, phais scalpels, bushings, thiab pwm daim hlau.

Yuav ua li cas lawv corrosion resistances piv nyob rau hauv kev pab cuam ib puag ncig?

410 muaj kev ncaj ncees corrosion kuj nyob rau hauv nruj nreem qhuav, sab hauv ib puag ncig. Nws yuav xeb sai sai yog tias raug dej los yog av noo yam tsis muaj kev tiv thaiv txheej.420 cov ntsiab lus siab dua cov pa roj carbon ntau me ntsis txo nws cov corrosion kuj piv rau 410, ua rau nws tseem nyob ntawm oiling los yog plating los tiv thaiv xeb nyob rau hauv damp tej yam kev mob.Tsis muaj qib yuav tsum tau siv sab nraum zoov los yog nyob rau hauv kev sib cuag nrog dej tsis muaj qhov tseem ceeb nto tiv thaiv.

Dab tsi yog kev lag luam fabrication- tawm ntawm ob qib?

410 yog tib qib siv martensitic nkaus xwb uas suav hais tias yog "weldable," txawm hais tias nws tseem yuav tsum tau ua kom sov thiab tom qab-weld kho cua sov kom rov ua kom cov ductility.420 yog qhov tseem ceeb tsis tuaj yeem nyob rau hauv nws lub xeev hardened thiab nquag tawg yog welded hauv lub xeev annealed yam tsis muaj kev saib xyuas hnyav. Nws yuav luag tsuas yog koom nrog kev siv tshuab (rivets, screws).420 cov cav tov zoo kom ua tiav zoo tab sis yuav tsum tau kho cua sov kom ua tiav nws lub peev xwm; tsis muaj kev kho cua sov, nws yog softer thiab tsis muaj zog tshaj 410.

Cov kev txwv tseem ceeb thiab cov txheej txheem xaiv yog dab tsi?

410 tsis haum rau kev ua dej hiav txwv lossis tshuaj lom neeg; nws tsis muaj corrosion kuj ntawm 304 los yog 316.420 tsis haum rau cov qauv load-cov kabmob uas yuav tsum tau toughness; Nws yog nkig dhau lawm thiab yuav ua rau muaj kev cuam tshuam ntau dua li khoov.Xaiv 410 thaum koj xav tau cov hlau nplaum, weldable, qis- nqi hlau rau cov khoom siv tshuab qhuav.Xaiv 420 thaum koj xav tau cua sov- steel kho tau rau cov cuab yeej txiav lossis hnav daim hlau uas yuav tiv thaiv cov khoom.