GX130CrSi29, kuj raug xaiv los ntawm cov khoom siv naj npawb 1.4777, sawv cev tshwj xeeb thiab qib siab -kev ua tau zoo hauv tsev neeg ntawm cov cua sov- cov cam khwb cia hlau. Nws txoj kev xaiv, ua raws li cov qauv xws li EN 10295, qhia meej meej txog nws qhov muaj pes tsawg leeg thiab npaj siv. G qhia nws qhov xwm txheej raws li cov khoom siv casting, thaum lub X qhia txog qhov siab - alloy steel. Cov lej thiab cov cim 130CrSi29 taw tes rau nws cov yam ntxwv txhais: cov ntsiab lus carbon siab ntawm kwv yees li 1.30 feem pua thiab ntau cov chromium thiab silicon alloying ntsiab lus, nrog chromium tsom ib ncig ntawm 29 feem pua. Cov khoom no yog tsim los rau qhov kev xav tau siab tshaj plaws - qhov kub thiab txias qhov chaw uas cov khoom yuav tsum tiv taus tsis tsuas yog huab cua kub thiab oxidation tab sis kuj tseem ceeb hnav thiab kev tsim txom. Nws pom nws lub hom phiaj hauv cov haujlwm xws li kev ua cov ntxhia, petrochemicals, thiab lub zog tsim hluav taws xob, qhov chaw ua haujlwm ntev thiab tsis kam ua ke thermal thiab mechanical degradation yog qhov tseem ceeb.
Qhov tshwj xeeb kev ua tau zoo ntawm GX130CrSi29 yog qhov tshwm sim ncaj qha ntawm nws cov tshuaj ua tib zoo ntsuas cov tshuaj muaj pes tsawg leeg, uas txawv nws ntawm qis dua -cov pa roj carbon cua sov- qib resistant. Qhov kev qhia tshwj xeeb yuav tsum muaj cov pa roj carbon ntau ntawm 1.2 txog 1.4 feem pua ntawm qhov hnyav. Qhov siab carbon qib no yog lub luag haujlwm tseem ceeb rau cov khoom siv siab hardness thiab zoo heev tsis kam rau abrasive hnav. Cov pa roj carbon sib xyaw nrog chromium los ua ib qho tseem ceeb ntawm cov tawv chromium carbides nyob rau hauv steels microstructure. Cov carbides no muab cov tawv tawv, hnav- qhov chaw tiv taus uas tuaj yeem tiv taus cov dej ntxhia, tshauv, thiab lwm yam khoom tshwj xeeb ntawm qhov kub thiab txias. Cov yam ntxwv tseem ceeb tshaj plaws tseem yog nws cov ntsiab lus chromium siab, teev ntawm 27.0 thiab 30.0 feem pua. Qhov muaj ntau ntawm chromium no yog qhov tseem ceeb rau kev muab cov hlau nrog nws qhov tshwj xeeb tiv thaiv oxidation thiab corrosion ntawm qhov kub siab. When exposed to hot oxidizing atmospheres, chromium facilitates the formation of a dense, adherent, and stable chromium oxide layer on the surface. Qhov ntsuas tiv thaiv no ua raws li qhov thaiv tsis tau, tiv thaiv cov hlau hauv qab los ntawm kev tawm tsam ntxiv los ntawm oxygen, sulfur, thiab lwm yam corrosive combustion gases, yog li tiv thaiv kev scaling thiab cov khoom siv khib nyiab. Silicon, tam sim no nyob rau hauv thaj tsam ntawm 1.0 mus rau 2.5 feem pua, ua haujlwm sib koom ua ke nrog chromium. Nws tsis tsuas yog txhim kho cov fluidity ntawm cov hlau molten thaum lub sij hawm casting txheej txheem, tso cai rau zus tau tej cov duab complex, tab sis kuj txhim khu kev tsim thiab ruaj khov ntawm kev tiv thaiv oxide nplai, ntxiv boosting siab - kub oxidation kuj. Lwm cov ntsiab lus yog ua tib zoo tswj. Manganese raug tso cai nyob rau hauv thaj tsam ntawm 0.5 mus rau 1.0 feem pua, thaum phosphorus thiab sulfur yog khaws cia kom tsawg kawg nkaus ntawm 0.035 feem pua thiab 0.03 feem pua nyob rau hauv lub sij hawm kom ntseeg tau lub suab castings thiab tiv thaiv cov teeb meem xws li kub tawg. Nickel thiab molybdenum yog suav tias yog cov khoom seem thiab raug txwv rau qhov siab tshaj plaws ntawm 1.0 feem pua thiab 0.5 feem pua txhua qhov, vim lawv tsis yog thawj alloying ntxiv rau qib ferritic tshwj xeeb.
Cov khoom siv kho tshuab ntawm GX130CrSi29 muaj kev cuam tshuam rau nws ob qho - lub hom phiaj tsim rau siab - kub lub zog thiab hnav tsis kam. Thaum cov ntaub ntawv los ntawm cov khoom sib cais pov tseg ntawm chav tsev kub muab lub hauv paus rau kev tswj kom zoo, nws qhov tseeb muaj txiaj ntsig tau pom hauv kev pabcuam. Lub zog tawm los, qhia txog qhov kev ntxhov siab ntawm cov yas deformation pib, feem ntau tshaj tawm nyob ib ncig ntawm 299 MPa, nrog lub zog tensile qhov tseem ceeb feem ntau hais txog kwv yees li 581 MPa. Ductility, ntsuas los ntawm elongation, yog ntau txwv nyob rau hauv no siab - carbon alloy, feem ntau nyob ib ncig ntawm 23 feem pua, uas yog cov yam ntxwv ntawm ib tug khoom optimized rau hardness thiab hnav tsis kam tshaj formability. Lub hardness ntawm cov khoom yog ib qho tseem ceeb qhia txog kev ua tau zoo, nrog Brinell hardness qhov tseem ceeb feem ntau pom muaj nyob ib ncig ntawm 141 HBW, tab sis qhov no tuaj yeem sib txawv raws li qhov loj me me thiab kev kho cua sov. Nws yog ib qho tseem ceeb kom nkag siab tias cov chav no - qhov kub thiab txias tsis yog cov qauv tsim tshwj xeeb rau siab - cov ntawv thov kub. Hauv kev pabcuam, cov ntaub ntawv kev ua tau zoo yog tswj hwm los ntawm nws txoj kev tiv thaiv kev nkag mus, nws muaj peev xwm tiv taus ntev -lub sij hawm kev ntxhov siab ntawm qhov kub thiab txias yam tsis muaj deformation, thiab nws cov microstructural stability. Nws tsis kam mus rau carburization, qhov tsis xav nqus ntawm cov pa roj carbon monoxide uas tuaj yeem ua rau embrittlement, kuj yog ib qho tseem ceeb hauv kev ua haujlwm hydrocarbon. Tej zaum qhov tseem ceeb tshaj plaws, nws lub siab tawv kom ntseeg tau tias cov khoom xws li cov hniav sib tsoo thiab cov chutes tuav lawv daim ntawv thiab ua haujlwm txawm tias thaum tuav cov khoom kub, abrasive.
Lub cev muaj zog ntxiv txhais lub hnab ntawv thov rau GX130CrSi29. Nws qhov ceev yog kwv yees li 7.6 g / cm2, uas yog ib qho tseem ceeb rau siab - alloy ferritic steels thiab qhov tseem ceeb rau kev xam qhov hnyav hauv cov khoom tsim. Cov khoom siv thermal tshwj xeeb yog qhov tseem ceeb rau cov khoom raug thermal cycling thiab kub kub fluxes. Cov ntaub ntawv qhia txog qhov sib txawv ntawm thermal expansion uas dictates qhov hloov pauv nrog qhov kub thiab txias, ib qho tseem ceeb uas yuav tsum tau suav rau hauv kev tsim los tswj cov thermal stresses thiab tswj kev tshem tawm ntawm qhov txav los yog nyob ib sab. Cov ntaub ntawv tshwj xeeb qhia tias nws cov coefficient ntawm linear thermal expansion yog nyob ib ncig ntawm 11.5 x 10 / K ntawm 20C thiab 400C, nce mus rau 16.0 x 10 / K ntawm 20C thiab 1000C. Nws cov thermal conductivity, uas tswj cov cua kub zoo npaum li cas los ntawm cov khoom, yog kwv yees li 18.8 W / mK ntawm chav tsev kub, cuam tshuam qhov kub thiab txias gradients nyob rau hauv ib qho kev tivthaiv thaum cua sov thiab txias. Lub modulus ntawm elasticity, uas ntsuas nruj, txo nrog nce kub, ib qho tseem ceeb engineers yuav tsum xav txog nyob rau hauv cov txheej txheem xam nyob rau hauv high kub. Ib qho tseem ceeb tshwj xeeb rau cov khoom siv no yog nws qhov siab tshaj plaws siv kub. Raws li cov qauv zoo li DIN EN 10295, GX130CrSi29 raug ntsuas rau kev pabcuam txog 1100C hauv oxidizing cua. Txawm li cas los xij, qhov kev txwv no raug txo mus rau 1050C hauv kev txo cov cua sov los yog hauv ib puag ncig uas muaj cov sulfur-cov kabmob gases, qhov chaw tiv thaiv oxide txheej tuaj yeem cuam tshuam. Qhov ntsuas kub no qis dua me ntsis ntawm qee cov npib tsib xee- cov qib austenitic nplua nuj, tab sis nws hnav tsis kam muab nws qhov txiaj ntsig tshwj xeeb hauv cov ntawv thov tshwj xeeb.
Raws li ib tug cam khwb cia hlau, GX130CrSi29 yog yuav luag tshwj xeeb tshaj yog zoo li tus ua tiav los yog ze rau -cov khoom tiav los ntawm ntau yam txheej txheem foundry. G nyob rau hauv nws lub npe underscores tias nws cov khoom yog optimized rau lub as-cast condition. Qhov no tso cai rau kev lag luam kev lag luam ntawm qhov nyuaj, hnyav- seem geometries, xws li agitator caj npab, lub nruas burner, daim hlau hearth, thiab chutes, uas yuav tsis yooj yim sua rau fabricate los ntawm wrought txheej txheem xws li forging los yog dov. Cov khoom siv feem ntau yog muab nkag rau hauv lub as- nrum lub xeev, lub ntsiab lus tom qab solidification thiab txias los ntawm lub foundry, nws yog npaj txhij rau kev siv los yog tsuas machining rau qhov kawg qhov ntev. Txawm li cas los xij, kev kho cua sov tuaj yeem siv tau yog tias pom zoo. Piv txwv li, ISO 11973 tus qauv rau cov cua sov-cov ntaub ntawv pov thawj tiv taus cov ntawv sau tseg tias cov qib zoo li GX130CrSi29 yuav raug muab tshem tawm ntawm qhov kub ntawm qhov kub ntawm 800 txog 850 degrees Celsius. Xws li kev kho mob tuaj yeem ua tau los ua kom cov khoom muag muag me ntsis rau kev ua haujlwm lossis txo cov kev ntxhov siab sab hauv tsim thaum lub sij hawm txias ntawm complex castings, yog li txhim kho qhov ntev stability. Ib qho tseem ceeb rau cov khoom no yog nws cov weldability. Vim nws cov pa roj carbon ntau thiab cov ntsiab lus chromium, GX130CrSi29 feem ntau suav hais tias tsis tuaj yeem siv tau raws li cov khw muag khoom ib txwm muaj. Nws cov microstructure yog nquag tawg thaum vuam, yog li yog tias kev koom ua ke yog qhov tsim nyog, cov txheej txheem tshwj xeeb thiab cov ntaub ntawv muab tub lim yuav tsum tau ua, thiab feem ntau cov qauv tsim yuav zam kev sib txuas welded tag nrho.
Kev xaiv ntawm GX130CrSi29 rau ib daim ntawv thov tshwj xeeb yog tsav los ntawm nws qhov tshwj xeeb ua ke ntawm siab -kub oxidation kuj thiab tshwj xeeb tsis kam rau abrasive hnav. Ib qho ntawm nws qhov chaw tseem ceeb ntawm kev siv yog nyob rau hauv kev tsim cov khoom siv rau kev ua ntxhia thiab pyrometallurgy. Nws yog feem ntau ua hauj lwm rau fabricate agitator hniav thiab caj npab rau hlau pyrite roasting furnaces. Hauv cov ntawv thov no, cov khoom siv yuav tsum tau ua kom kub, abrasive sulfide ores ntawm qhov kub thiab txias, ua kom muaj kev tawm tsam tshuaj lom neeg los ntawm leej faj-cov kabmob gases thiab cov khoom siv los ntawm cov khoom siv. Nws tsis kam mus rau ob qho xwm txheej ua rau nws cov khoom ntawm kev xaiv. Ib yam li ntawd, nws yog siv rau burner drums, swb tuav, chutes, thiab hearth daim hlau uas tuav kub tej khib nyiab xws li tshauv, clinker, los yog ore. Cov khoom siv no yuav tsum tsis yog tsuas yog txhawb nqa hnyav ntawm qhov kub thiab txias tab sis kuj tiv thaiv qhov kev ua haujlwm ntawm cov ntaub ntawv zawv zawg tshaj lawv. Hauv kev lag luam petrochemical thiab hluav taws xob tsim hluav taws xob, nws pom kev siv hauv cov khoom noj khoom haus, ladles, thiab lwm yam hnav hnyav heev-cov khoom siv hluav taws xob tiv taus uas raug tshav kub thiab abrasive ib puag ncig. Cov ntaub ntawv muaj peev xwm tswj tau ib qho nyuaj, hnav- qhov chaw tiv taus thaum tiv taus siab -kub oxidation ua kom lub neej ua haujlwm ntev hauv cov kev xav tau no, txo qis sijhawm thiab cov nqi kho.
Thaum piv rau lwm cov cua sov- qib tiv taus, GX130CrSi29 nyob hauv ib qho chaw sib txawv ntawm qhov kev sib tshuam ntawm siab - kub lub zog thiab hnav tsis kam. Nws belongs rau tsev neeg ntawm ferritic tshav kub-cov hlau resistant, uas yog lawv cov ferritic microstructure. Qhov no txawv ntawm ob qho tib si qis dua - cov qib carbon ferritic zoo li GX40CrSi28 thiab cov hlau tsis muaj hlau austenitic ntau dua. Piv nrog rau GX40CrSi28, uas muaj tsuas yog 0.4 feem pua carbon thiab yog optimized feem ntau rau oxidation tsis kam thiab lub zog ntawm lub zog, GX130CrSi29 txi ib co ductility thiab fabricability rau ho hardness thiab hnav tsis kam. Qhov no ua rau nws yog qhov kev xaiv zoo tshaj qhov twg puas yog qhov kev txhawj xeeb tseem ceeb. Piv rau austenitic tshav kub-cov hlau tsis muaj zog, uas feem ntau muaj cov npib tsib xee kom ruaj khov rau cov qauv austenitic thiab muab lub zog nkag siab dua, GX130CrSi29 muab tus nqi ntau dua-cov tshuaj siv tau zoo hauv cov ntawv thov qhov kawg siab tshaj - qhov kub thiab txias tsis yog qhov tseem ceeb ntawm kev sib xyaw ua ke, tab sis qhov tseem ceeb ntawm oxidation yog qhov yuav tsum tau ua. Nws cov ntsiab lus chromium siab muaj kev tiv thaiv txog li 1100C, piv rau ntau qib austenitic, tab sis ntawm cov khoom siv qis dua vim tsis muaj cov npib tsib xee ua cov ntsiab lus alloying. ISO 11973 tus qauv muab kev taw qhia txog kev sib piv qib, tso cai rau cov kws ua haujlwm paub txog kev xaiv raws li cov kev pabcuam tshwj xeeb, hnyav yam xws li kub, huab cua, khoom siv thauj khoom, thiab hnav lub peev xwm.
Hauv kev xaus, GX130CrSi29 yog qhov tshwj xeeb thiab muaj txiaj ntsig zoo thaum tshav kub kub- resistant cam khwb cia hlau uas nws tus nqi yog nyob rau hauv nws cov cim ua ke ntawm siab chromium cov ntsiab lus rau oxidation kuj thiab siab carbon ntsiab lus rau hnav kuj. Nws ua tib zoo sib npaug ntawm cov tshuaj muaj pes tsawg leeg ua kom muaj kev tiv thaiv oxide txheej uas tiv thaiv siab - kub corrosion, thaum lub zog chromium carbides muab cov kav ntev uas xav tau los tiv thaiv ib puag ncig abrasive. Raws li ib tug casting alloy, nws muaj qhov yooj yim tsim los tsim complex, hnyav -lub luag hauj lwm qhov chaw rau cov khoom siv uas xav tau tshaj plaws. Txawm hais tias nws yuav tsis muaj qhov weldability los yog lub zog creep ntawm qee lwm qib, nws qhov kev ua tau zoo tshaj plaws hauv cov ntawv thov uas muaj kev kub hnyiab, xws li hauv kev ua cov ntxhia thiab cov khoom siv, ua kom nws siv tau thiab tseem ceeb. Rau cov kws tsim khoom ua haujlwm xaiv cov khoom siv rau siab- qhov kub thiab txias qhov kev pabcuam yog qhov tseem ceeb, kev nkag siab txog cov khoom tshwj xeeb thiab kev muaj peev xwm ntawm GX130CrSi29 yog qhov tseem ceeb rau kev qhia txog cov khoom uas yuav xa muaj kev nyab xeeb, ntev - kav ntev, thiab kev lag luam. Nws raug lees paub hauv cov qauv thoob ntiaj teb xws li EN 10295 thiab ISO 11973 ua kom nws cov xwm txheej zoo li cov khoom siv tseem ceeb hauv kev ua haujlwm siab -kub engineering.
