Cov nyhuv ntawm alloying ntsiab ntawm aluminium bronze
Aluminium bronze alloys yog ua los ntawm 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 alloying ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev ua haujlwm ntawm cov ntaub ntawv, xws li kev txhim kho corrosion zoo dua, hardness dua, zoo dua toughness, thiab lwm yam. Nyob rau tib lub sijhawm, 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 lub luag hauj lwm 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, nws yuav tsim cov koob zoo li FeAl3, uas yuav txo cov khoom siv dag zog thiab corrosion tsis kam ntawm cov hlau. Yog li, Fe cov ntsiab lus hauv cov hlau yuav tsum tsis pub tshaj 5%.
2. Yog hais tias cov ntsiab lus ntawm Ni, Mn, thiab Al 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 atomic diffusion tus nqi nyob rau hauv txhuas bronze thiab ua rau kom lub stability ntawm lub theem, yog li inhibiting lub "self-annealing" tshwm sim uas ua rau cov alloy ua nkig, zoo heev txo cov brittleness ntawm cov alloy.
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% ~ 1.0 tuaj yeem ua kom zoo dua cov nplej.
Nickel Nim
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. Ni tsub kom lub eutectoid transformation kub ntawm txhuas bronze ntawm ib sab, thiab txav lub eutectoid taw tes muaj pes tsawg leeg nyob rau hauv cov kev taw qhia ntawm kub nce nyob rau hauv lwm yam tes, thiab kuj yuav hloov lub morphology ntawm theem. Thaum cov ntsiab lus Ni tsawg, theem yog koob-zoo li tus, thiab thaum cov ntsiab lus npib tsib xee nce mus txog 3%, nws hloov mus rau hauv flake.
2. Thaum Mn ntxiv rau Cu-Al-Ni alloy, muaj ib qho kev nyiam rau cov qauv granular thaum lub sij hawm undergoes eutectoid transformation.
3. Ni tuaj yeem txhim kho lub zog, hardness, thermal stability thiab corrosion kuj ntawm txhuas bronze. Cu-Al-Ni-Fe alloy uas muaj qee qhov nyiaj Ni tsis tas yuav kho thiab quenched tom qab ua haujlwm kub, thiab tuaj yeem ncaj qha hnub nyoog.
4. Ntxiv Ni thiab Fe rau txhuas bronze tib lub sijhawm tuaj yeem tau txais kev ua haujlwm zoo dua. Hauv Cu-A1-Ni-Fe alloy, nag lossis daus morphology 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 Mn
1. Mn muaj ib tug loj solubility nyob rau hauv cov khoom tov ntawm Cu-Al alloy, tab sis txo cov khoom solubility ntawm txhuas nyob rau hauv . Manganese stabilizes lub decomposition ntawm theem, txo qhov pib kub ntawm theem transformation, thiab ncua eutectoid transformation.
2. Cov ntsiab lus Mn nyob rau hauv aluminium bronze tsis tshaj qhov siab tshaj plaws solubility txwv, uas muaj txiaj ntsig zoo rau cov khoom siv kho tshuab thiab corrosion tsis kam ntawm cov alloy, thiab lawv muaj kev ua haujlwm zoo thiab tsim cov khoom.
3. Binary aluminium bronze uas muaj 0.3% ~ 0.5% Mn muaj cov khoom ua haujlwm kub zoo heev, thiab kev sib tsoo thaum lub sij hawm kub dov yog txo qis.
4. Ib qho nyiaj ntawm Fe yog ntxiv rau txhuas bronze uas muaj Mn, thiab qhov kev ua tau zoo ntawm cov hlau txuas ntxiv txhim kho, 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 los yog sib npaug rau 0.2% Sn rau txhuas bronze tuaj yeem txhim kho cov alloy lub peev xwm los 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 yaj nyob rau hauv Cu-Al alloy mus rau ib tug txwv, nthuav cov theem cheeb tsam. Txawm li cas los xij, Zn yuav txo cov hlau nplua nuj theem ntawm Cu-Al-Ni-Fe alloys, 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%, thiab rau feem ntau txhuas bronzes yuav tsum tsis txhob ntau tshaj 0.1%, txwv tsis pub nws yuav txo cov neeg kho tshuab zog thiab txheej txheem cov khoom ntawm cov hlau, tab sis nws tuaj yeem txhim kho lub machinability ntawm cov hlau.
