High manganese hlauNws muaj qhov tsis tshua muaj zog thiab hardness, tab sis siab plasticity thiab toughness, thiab muaj peev xwm ua haujlwm siab hardening. Yog li ntawd, thaum nws yog deformed nyob rau hauv kev cuam tshuam loj heev thiab muaj zog siab, austenite undergoes ua hauj lwm hardening. Ntxiv mus, nrog rau kev hloov pauv ntawm martensitic, qhov saum npoo ntawm qhov tau dhau los ua qhov tseem ceeb, mus txog HRC 52-56. Yog li ntawd, siab manganese steel muaj siab hnav tsis kam.
1, Kev sib raug zoo ntawm hnav tsis kam thiab Toughness ntawm High Manganese Steel
Cov ntsiab lus ntawm manganesesiab manganese hlauyog feem ntau ntawm 11 feem pua thiab 14 feem pua, yog li nws hnav tsis kam yog qhov zoo heev. Tom qab ua tiav, ib feem ntawm manganese ntsiab nyob rau hauv siab manganese hlau yuav yaj mus rau hauv cov hlau matrix, tsim ib tug uniform ntxaib qauv thiab hardened martensite qauv. Cov qauv no muaj zog tiv thaiv hnav, yog li qhia txog kev hnav tsis kam ntawm cov hlau manganese siab.
Nyob rau tib lub sij hawm, siab manganese hlau kuj muaj zoo toughness. Qhov no yog vim hais tias cov ntsiab lus ferrite nyob rau hauv siab manganese hlau yog siab, thiab ferrite yog ib tug qauv nrog zoo toughness, uas yuav ua tau zoo tiv thaiv brittle puas ntawm siab manganese hlau, yog li qhia lub toughness ntawm siab manganese hlau.
2, Yog vim li cas rau qhov zoo ntawm High Manganese hlau
1. High manganese steel muaj kev hnav zoo heev. Vim muaj cov manganese ntau nyob rau hauv siab manganese hlau, cov ntsiab lus no tuaj yeem ntxiv dag zog rau lub lattice ntawm cov hlau thiab tiv taus kev hnav thiab kev sib txhuam thaum hnav, ua rau muaj kev hnav zoo heev ntawm cov hlau manganese siab.
2. High manganese steel muaj zoo toughness. High manganese steel muaj cov ntsiab lus siab ntawm ferrite, yog li nws muaj qhov zoo toughness. Lub koom haum no tuaj yeem tso cov kev ntxhov siab ntawm cov hlau mus rau sab nraud, yog li tiv thaiv kev tawg thiab tawg ntawm cov hlau, ua rau cov hlau manganese siab muaj qhov ua tau zoo heev.
3. High manganese steel yog yooj yim rau txheej txheem. High manganese steel muaj siab hardness thiab zoo toughness, uas ua rau nws yooj yim rau txheej txheem thiab yas deform, ua rau nws yooj yim mus nqa tawm forging, vuam thiab lwm yam txheej txheem nyob rau hauv ntau lawm.
4. High manganese steel muaj corrosion kuj zoo. Manganese muaj cov txiaj ntsig zoo rau kev txhim kho corrosion ntawm cov hlau, yog li cov hlau manganese siab tau zoo heev corrosion kuj.
Hauv cov ntsiab lus, qhov zoo ntawm cov hlau manganese siab nyob rau hauv hnav tsis kam thiab toughness yog txiav txim los ntawm nws cov microstructure thiab tshuaj muaj pes tsawg leeg. Lub xub ntiag ntawm cov manganese siab thiab cov qauv ferrite nyob rau hauv siab manganese steel tuaj yeem muab cov yam ntxwv sib txawv rau cov hlau, ua rau nws siv cov khoom siv zoo hauv kev tsim khoom.
Manganese Hlau Mechanical Properties
1. Cov nyhuv ntawm carbides rau cov khoom ntawm cov hlau manganese siab
Txo qhov cuam tshuam toughness thiab tensile zog
2. Cov nyhuv ntawm non-metallic inclusions ntawm cov khoom ntawm siab manganese hlau
Thaum lub sij hawm solidification ntawm molten hlau, ib tug loj npaum li cas ntawm manganese oxide precipitates nyob rau hauv daim ntawv ntawm cov non-metallic inclusions nyob rau hauv lub perimeter ntawm cov hlau, txo qhov cuam tshuam toughness ntawm cov hlau thiab ua rau lub siab nyiam kub tawg nyob rau hauv lub casting.
3. Kev xaiv cov tshuaj muaj pes tsawg leeg thiab nws qhov cuam tshuam rau cov khoom ntawm cov hlau manganese siab
(1) Thaum cov ntsiab lus carbon thiab manganese cov ntsiab lus hauv cov hlau tsis tshua muaj, nws tsis txaus los tsim cov nyhuv hardening zoo; Thaum cov ntsiab lus carbon siab dhau lawm, ntau cov carbides, tshwj xeeb tshaj yog coarse carbides, yuav tshwm sim hauv lub xeev cam khwb cia. Yog li ntawd, txhawm rau kom tsis txhob nag lossis daus ntawm carbide, nws yog ib qho tsim nyog yuav tsum tswj cov ntsiab lus ntawm cov pa roj carbon tsis txhob siab dhau.
Txhawm rau kom muaj kev ua tau zoo ntawm cov hlau manganese siab, nws yuav tsum muaj cov ntsiab lus manganese txaus. Thaum cov ntsiab lus ntawm manganese tsawg dhau lawm, ib qho qauv austenite tsis tuaj yeem tsim tau; Thiab cov ntsiab lus manganese ntau dhau kuj tsis tsim nyog. Hauv kev tsim khoom, nws feem ntau tau teev tseg tias WMn yuav tsum tswj hwm ntawm 11.0 feem pua thiab 14.0 feem pua , thiab WC yuav tsum tswj ntawm 0.9 feem pua thiab 1.3 feem pua . Nws yuav tsum tau taw qhia tias yuav tsum muaj kev sib xyaw tsim nyog ntawm manganese cov ntsiab lus thiab cov ntsiab lus carbon, uas yog, yuav tsum muaj qhov tsim nyog manganese carbon piv, feem ntau tswj ntawm Mn / C=10.
(2) Cov ntsiab lus tshwj xeeb ntawm Wsi hauv cov hlau manganese siab nrog cov ntsiab lus silicon yog 0.3 feem pua rau 0.8 feem pua. Silicon yuav txo cov solubility ntawm carbon nyob rau hauv austenite, txhawb carbide nag lossis daus, thiab txo cov hnav tsis kam thiab cuam tshuam toughness ntawm hlau. Yog li ntawd, cov ntsiab lus ntawm silicon yuav tsum tau tswj nyob rau hauv qis qis ntawm cov specification.
(3) Cov ntsiab lus tshwj xeeb ntawm cov hlau manganese siab nrog cov ntsiab lus phosphorus yog Wp Tsawg dua lossis sib npaug rau 0.7 feem pua. Thaum smelting siab manganese hlau, vim muaj phosphorus cov ntsiab lus ntawm manganese hlau, phosphorus cov ntsiab lus nyob rau hauv cov hlau feem ntau kuj siab. Vim tias phosphorus tuaj yeem txo qhov cuam tshuam ntawm cov hlau thiab ua rau cov hlau ua kom tawg, cov ntsiab lus phosphorus ntawm cov hlau yuav tsum raug txo kom tsawg li ntau tau.
(4) Cov lus qhia tshwj xeeb rau cov hlau manganese siab nrog cov ntsiab lus sulfur yog Ws tsawg dua lossis sib npaug rau 0.05 feem pua . Vim nws cov ntsiab lus siab manganese, feem ntau ntawm cov sulfur thiab manganese nyob rau hauv cov hlau ua ke los tsim manganese sulfide (MnS) thaum lub sij hawm melting txheej txheem, uas nkag mus rau hauv slag. Yog li ntawd, cov ntsiab lus sulfur hauv cov hlau feem ntau qis (feem ntau tsis tshaj 0.03 feem pua), yog li qhov teeb meem ntawm sulfur hauv cov hlau manganese siab yog siab dua li ntawm phosphorus.
Txoj Kev Loj Hlob
(1) Ntawm ntau txoj hauv kev tam sim no siv los txhim kho cov microstructure thiab cov khoom ntawm cov hlau manganese siab, cov nag lossis daus ntxiv dag zog rau kev kho cua sov txoj kev muaj cov yam ntxwv ntawm cov txheej txheem yooj yim, ruaj khov, tsis tshua muaj nqi, thiab txuag hluav taws xob, thiab muaj txiaj ntsig kev lag luam.
(2) Tau txais qee qhov nyiaj thiab qhov loj ntawm dispersed carbide hard point microstructure hauv siab manganese steel los ntawm kev kho cua sov tuaj yeem txhim kho kev ua haujlwm hardening peev xwm thiab yog li txhim kho hnav tsis kam.
(3) Nrog rau kev tshawb fawb tob zuj zus ntawm kev ua kom muaj zog ntawm nag lossis daus, ntxiv dag zog rau kev hnav tsis kam ntawm matrix nrog cov ntsiab lus nyuaj carbide yuav dhau los ua cov qauv kev txhim kho tseem ceeb los txhim kho qhov hnav tsis kam ntawm cov hlau manganese siab.
