High-manganese steel casting technology piav qhia

Raws li kev ua haujlwm ntawm kev cuam tshuam lub zog siab, daim ntawv thov ntau ntawm cov hlau manganese siab thiab ultra-siab manganese steel casting yog dav. Ntau lub foundries tsis muaj kev tsim cov hlau castings. Ua ib qho lus piav qhia luv luv rau cov haujlwm tshwj xeeb tam sim no, muab rau cov neeg siv khoom siv.
1 Tshuaj muaj pes tsawg leeg
Cov hlau manganese siab tau muab faib ua 5 qib raws li lub teb chaws tus qauv, qhov sib txawv tseem ceeb yog cov ntsiab lus carbon, nws qhov ntau yog 0.75% -1.45%. Hnyav ntaus, qis hauv carbon. Cov ntsiab lus manganese nyob nruab nrab ntawm 11.0% -14.0%, thiab feem ntau yuav tsum tsis pub tsawg dua 13%. Tsis muaj lub teb chaws tus qauv rau super siab manganese hlau, tab sis cov ntsiab lus manganese yuav tsum siab dua 18%. Cov qib ntawm cov ntsiab lus silicon muaj qhov cuam tshuam zoo rau qhov cuam tshuam toughness, yog li nws tsim nyog siv qhov qis qis kom tsis pub ntau tshaj 0.5%. Tsawg phosphorus thiab tsis muaj sulfur yog qhov tseem ceeb tshaj plaws, vim hais tias cov ntsiab lus siab manganese ib txwm ua lub luag haujlwm desulfurization, yog li kev txo phosphorus yog qhov tseem ceeb tshaj plaws, sim ua kom phosphorus qis dua 0.07%. Chromium yog los txhim kho qhov hnav tsis kam, feem ntau nyob rau hauv li 2.0%.
2 Cov khoom siv rauv
Cov khoom siv rauv yog txiav txim siab los ntawm cov tshuaj muaj pes tsawg leeg. Lub qhov cub tseem ceeb yog cov pa roj carbon zoo (los yog ingot), siab carbon hlau manganese, nruab nrab carbon hlau manganese, siab carbon hlau chrome thiab siab manganese hlau. Ib qho kev ceeb toom tshwj xeeb ntawm no yog tias tib neeg xav tias ntev npaum li cov tshuaj muaj pes tsawg leeg tsim nyog, nws tuaj yeem siv rov qab rau cov khoom siv hauv qhov cub. Tus neeg no muaj teeb meem. Yog vim li cas vim li cas qee lub Hoobkas khoom zoo tsis zoo, tag nrho ntawm qhov no. Tsis tsuas yog siab manganese hlau, ultra-siab manganese steel, tag nrho cov hlau castings, tsis tuaj yeem siv rau cov khoom siv hluav taws xob ntau dhau, cov khoom siv hluav taws xob yuav tsum tsis pub tshaj 25%. Yog li, ua li cas txog tus nqi xa rov qab? Tsuav qhov pov tseg tsawg kawg nkaus, yuav tsis muaj qhov seem ntxiv.
3 Melt
Ntawm no tsom mus rau qhov kev txiav txim ntawm kev pub mis, txawm tias nrog rau nruab nrab zaus rauv, lossis hluav taws xob arc rauv smelting, ib txwm ua ntej smelting carbon steel, thiab txhua yam ntawm ferromanganese thiab lwm yam khoom muaj txiaj ntsig, muab faib ua ntau zaus, txhua zaus me me rau hauv lub cub tawg, cov ntsiab lus tseem ceeb hauv qhov kawg ntxiv, kom txo tau qhov kub hnyiab. Cov khoom thaiv yuav tsum me npaum li qhov ua tau, nrog 50-80mm yog qhov tsim nyog. Tom qab melting, thaum lub cub tawg kub txog 1580-1600 degree, deoxygenation, dehydrogenation, nitrogen tshem tawm, txhuas hlau, Si-Ca alloy los yog SiC cov ntaub ntawv kuj siv tau. Nias lub deoxygenation tob rau hauv lub cub tawg. Cov hlau ua kua saum npoo ntawm lub sijhawm no nrog tus neeg sawv cev npog los txiav tawm cov cua sab nraud. Tsis tas li ntawd calm down rau ib lub sij hawm ntawm lub sij hawm, kom oxides, inclusions muaj txaus lub sij hawm mus ntab. Txawm li cas los xij, ntau lub lag luam, tsuas yog txhuas hlau thiab txawm tias txhuas chips, tawg ntawm cov hlau ua kua, thiab tsis npog, tsis yog pov tseg! Thaum lub sij hawm no, nruab nrab carbon thiab hlau manganese tau siv los kho cov ntsiab lus ntawm manganese thiab carbon.
Ua ntej cov hlau, nws yog ib qho tsim nyog yuav tau ci lub pob kom ntau tshaj 400 degree. Thaum lub sij hawm kev ntsuam xyuas, siv V-Fe, Ti-Fe, tsis tshua muaj lub ntiaj teb thiab lwm yam kab kawm yog ib tug tsim nyog txhais tau tias yuav ua rau cov thawj crystallization refinement, uas yog ib qho tseem ceeb rau cov khoom ua tau zoo.
4 cov khoom siv hluav taws xob thiab cov khoom siv molding
Txhawm rau txuas ntxiv rau qhov kev txiav txim rau lub cub tawg, thaum twg kom paub qhov txawv ntawm cov yam ntxwv ntawm cov hlau thiab lub tshuab ua kom sov. Manganese steel yog alkaline, rauv hauv ob sab phlu ntawm chav kawm xaiv magnesium cov khoom. Mating furnace hauv ob sab phlu kom rov ua haujlwm dua. Ntxiv rau qhov cub hauv ob sab phlu yog tsis tuab heev, txog 80 cm txhua lub sij hawm yog tsim nyog, tamping kom tsis tshua muaj kub rau lub sij hawm ntev. Yog tias qhov kev ua tau zoo dua qub, tus sau tau qhia tias kev tsim cov crucible (Shenyang Lide Hoobkas thiab Hengfeng Hoobkas ob muag khoom tiav), los ntawm dismantling furnace tamping, tsis yog 1 teev, tuaj yeem muab tso rau hauv ntau lawm, tib lub sijhawm tsim crucible yog muaj txiaj ntsig zoo rau lub tshuab hluav taws xob tiv thaiv. Tau kawg, qhov ntev ntawm qhov kev txiav txim rau lub cub tawg thiab tus neeg teb xov tooj yog loj