Cov nyhuv ntawm alloying ntsiab ntawm aluminium bronze
Cov ntsiab lus tseem ceeb ntawm aluminium bronze alloy yog tooj liab thiab txhuas. Txhawm rau txhim kho thiab txhim kho kev ua tau zoo ntawm aluminium bronze, qee qhov lwm yam alloying feem ntau ntxiv. Qhov tsim nyog ntxiv ntawm cov ntsiab lus alloy ua lub luag haujlwm tseem ceeb hauv kev txhim kho cov khoom siv, xws li kev tiv thaiv corrosion ntau dua, hardness dua, thiab zoo dua toughness. Nyob rau tib lub sijhawm, kev sib ntxiv ntau dhau ntawm qee cov ntsiab lus tseem yuav ua rau muaj qhov tshwm sim tsis zoo, xws li txo lub zog, nce brittleness, txo corrosion kuj, thiab lwm yam. Kab lus no qhia txog lub luag haujlwm ntawm lub ntsiab alloying ntsiab ntxiv rau txhuas bronze.
Hlau Fe
1. Ib qho me me ntawm Fe tuaj yeem yaj hauv cov khoom siv ntawm Cu-Al alloy. Yog tias nws dhau lawm, koob zoo li FeAl3 yuav raug tsim, uas yuav txo tau cov khoom siv dag zog thiab kev tiv thaiv corrosion ntawm cov hlau. Yog li, Fe cov ntsiab lus hauv cov hlau yuav tsum tsis pub tshaj 5%.
2. Yog hais tias Ni, Mn, thiab Al cov ntsiab lus nyob rau hauv lub alloy nce, lub solubility ntawm Fe nyob rau hauv cov khoom tov yuav raug txo ntxiv. Hlau tuaj yeem ua kom qeeb ntawm qhov sib txawv ntawm cov atoms hauv aluminium bronze thiab ua rau kom muaj kev ruaj ntseg ntawm theem, yog li inhibiting qhov tshwm sim "tus kheej-annealing" uas ua rau cov hlau ua nkig, zoo heev txo cov brittleness ntawm cov hlau.
3. Qhov tsim nyog ntawm cov hlau tuaj yeem ua kom zoo dua cov casting thiab recrystallization nplej ntawm txhuas bronze thiab txhim kho cov khoom siv kho tshuab. Ntxiv 0.5% rau 1.0 yuav muaj qhov pom tseeb ntawm kev ua kom cov nplej.
NickelNi
1. Nickel muaj qee yam khoom solubility hauv Cu-Al alloy. Thaum Ni cov ntsiab lus siab tshaj qhov siab tshaj plaws solubility, K theem NiAl theem yuav raug tsim. Ntawm qhov tod tes, Ni nce qhov kev hloov pauv ntawm eutectoid kub ntawm txhuas bronze, ntawm qhov tod tes, nws txav cov eutectoid point Cheebtsam hauv cov cua kub kev taw qhia, thiab tuaj yeem hloov pauv morphology ntawm theem. Thaum cov ntsiab lus Ni tsawg, cov theem yog koob-zoo li tus, thiab thaum cov ntsiab lus nickel nce mus txog 3%, nws hloov mus rau hauv flakes.
2. Thaum Mn ntxiv rau Cu-Al-Ni alloy, cov theem nyhav tsim cov qauv granular thaum lub sij hawm dhau mus eutectoid transformation.
3. Ni tuaj yeem txhim kho lub zog, hardness, thermal stability thiab corrosion kuj ntawm txhuas bronze. Cu-Al-Ni-Fe alloys uas muaj qee tus nqi ntawm Ni tsis tas yuav muaj kev kho mob thiab quenching tom qab ua kub. Lub sij hawm ncaj qha.
4. Ntxiv Ni thiab Fe tib lub sijhawm rau txhuas bronze tuaj yeem tau txais kev ua tau zoo tag nrho. Hauv Cu-A1-Ni-Fe alloy, daim ntawv nag lossis daus ntawm κ theem muaj kev cuam tshuam zoo rau nws cov khoom siv kho tshuab.
5. Cov ntsiab lus zoo tshaj plaws ntawm Ni rau Fe yog 0.9 ~ 1.1.
Manganese
1. Mn muaj ib tug loj solubility nyob rau hauv cov khoom tov ntawm Cu-Al alloy, tab sis nws txo cov khoom solubility ntawm txhuas nyob rau hauv . Manganese stabilizes -phase decomposition, txo qhov pib kub ntawm theem hloov, thiab ncua kev hloov eutectoid.
2. Cov ntsiab lus Mn nyob rau hauv txhuas bronze tsis tshaj qhov siab tshaj plaws solubility txwv, uas yog zoo rau cov neeg kho tshuab zog thiab corrosion kuj ntawm alloy. Lawv muaj kev ua tau zoo thiab formability.
3. Binary aluminium bronze uas muaj 0.3% ~ 0.5% Mn muaj cov khoom ua haujlwm kub zoo heev, thiab nyiam tawg thaum kub dov yog txo qis.
4. Ntxiv ib qho nyiaj ntawm Fe rau txhuas bronze uas muaj Mn tuaj yeem txhim kho qhov kev ua tau zoo ntawm cov hlau, vim Fe tuaj yeem ua kom zoo dua cov nplej, tab sis hlau yuav ua rau cov nyhuv stabilizing ntawm Mn nyob rau theem.
Tin thiab Chromium
1. Ntxiv Tsawg dua lossis sib npaug rau 0.2% Sn rau txhuas bronze tuaj yeem txhim kho lub peev xwm ntawm cov hlau kom tiv thaiv kev ntxhov siab corrosion tawg hauv chav thiab me ntsis acidic cua.
2. Chromium tuaj yeem txhim kho cov khoom siv ntawm binary Cu-Al alloys, inhibit grain kev loj hlob thaum lub sij hawm alloy annealing, thiab ua kom cov hardness ntawm cov ntaub ntawv annealed.
Zinc thiab silicon
1. Zinc muaj kev sib cais tsawg hauv Cu-Al alloy thiab nthuav dav rau theem cheeb tsam. Txawm li cas los xij, Zn yuav txo cov hlau nplua nuj theem ntawm Cu-Al-Ni-Fe alloy thiab txo qhov hnav tsis kam. Cov ntsiab lus siab tshaj plaws ntawm impurity zinc hauv cov txheej txheem txhuas bronze yog 1.0%.
2. Silicon yog ib qho impurity nyob rau hauv txhuas bronze, thiab nws cov ntsiab lus yuav tsum tsis txhob ntau tshaj 0.2%. Rau feem ntau aluminium bronzes, nws yuav tsum tsis pub tshaj 0.1%. Txwv tsis pub, cov khoom siv kho tshuab thiab cov txheej txheem cov khoom ntawm cov hlau yuav raug txo, tab sis cov machinability ntawm cov hlau tuaj yeem txhim kho.
