Cov nyhuv ntawm alloying ntsiab ntawm tin bronze
Tin bronze yog tooj liab alloy nrog tooj liab raws li lub hauv paus ntsiab lus thiab tin yog lub ntsiab tseem ceeb. Muaj ntau ntau hom tin bronze alloys, uas yog tsim rau siv nyob rau hauv txawv kev ua hauj lwm tej yam kev mob. Qhov sib txawv ntawm cov hom yog nyob ntawm tus nqi ntawm cov khoom ntxiv. Cov khoom sib txawv ntxiv tuaj yeem ua rau tin bronze alloys kom ua tiav cov khoom sib txawv thiab siv rau hauv kev siv sib txawv. Hauv qab no peb yuav ua kom nthuav dav qhov cuam tshuam ntawm qhov sib ntxiv ntawm ntau lub ntsiab lus ntawm cov khoom ntawm tin bronze.
Phosphorus P
1. Cov ntsiab lus phosphorus ntawm tin bronze feem ntau tsis tshaj 0.45%. Thaum cov ntsiab lus phosphorus ntau dua 0.5%, eutectic-peritectic cov tshuaj tiv thaiv L+ +Cu3P yuav tshwm sim nyob ib ncig ntawm 637, ua rau thermal embrittlement. Thaum cov ntsiab lus phosphorus ntawm cov hlau yog ntau dua 0.3%, eutectic muaj li ntawm tooj liab thiab tooj liab phosphide (Cu3P) yuav tshwm sim hauv cov qauv.
2. Phosphorus yog ib qho zoo deoxidizer rau tooj liab alloys thiab txhim kho cov fluidity ntawm tin bronze. Qhov tsis zoo yog tias nws nce qhov rov qab cais ntawm lub ingot.
3. Cov qoob loo loj ntawm cov khoom ua ntej txias txias thiab qhov kub thiab txias annealing (180 ~ 300) tom qab ua tiav muaj kev cuam tshuam zoo rau cov khoom siv hluav taws xob ntawm tin-phosphor bronze. Thaum cov nplej zoo, lub zog, hardness, elastic modulus, thiab qaug zog lub zog ntawm cov khoom yog siab tshaj cov ntaub ntawv ntawm coarse grain, tab sis lub plasticity yog me ntsis qis. 4. Tom qab ua haujlwm txias tin-phosphor bronze yog annealed ntawm 200 ~ 260 degree rau 1 ~ 2 teev, nws lub zog, plasticity, elastic txwv thiab elastic modulus yog txhim kho, thiab nws elastic stability kuj yuav txhim kho.
ZincZn
1. Zinc yog ib qho ntawm cov hlau alloy ntawm tin bronze. Zinc muaj ib tug siab solubility nyob rau hauv alpha solid tov ntawm tin bronze. Yog li ntawd, Cu-Sn-Zn ua tiav bronze yog ib qho kev daws teeb meem. Zn txhim kho cov fluidity ntawm cov hlau, txo qis qhov kub ntawm crystallization, thiab txo qis kev sib cais, tsis muaj kev cuam tshuam loj rau nws cov qauv thiab cov khoom.
2. Cov ntsiab lus Zn nyob rau hauv cov txheej txheem tin bronze feem ntau tsis ntau tshaj 5%.
LeadPb
1. Cov ntsiab lus ntawm Pb hauv tin bronze tsis tshaj 5%. Nws tsis yog khoom yaj hauv theem thiab muaj nyob hauv lub xeev dawb. Nws raug faib nruab nrab ntawm dendrites hauv daim ntawv ntawm cov xim dub, tab sis kev faib tsis sib xws.
2. Pb tuaj yeem txo qhov kev sib txhuam coefficient ntawm tin bronze, txhim kho qhov hnav tsis kam, thiab txhim kho lub machinability, tab sis nws txo qis cov khoom siv ntawm cov hlau me ntsis.
Manganese
1. Mn yog ib qho teeb meem impurities nyob rau hauv tin bronze, thiab nws cov ntsiab lus yuav tsum nruj me ntsis tswj thiab yuav tsum tsis txhob ntau tshaj 0.002%. 2. Manganese tau yooj yim oxidized los tsim oxides, uas txo cov fluidity ntawm cov hlau yaj. Tom qab solidification, lawv tau muab faib rau ntawm cov ciam teb ntawm grain, tsis muaj zog lub intergranular bonding thiab txo lub zog.
Hlau Fe
Fe yog ib qho impurity hauv tin bronze, nrog cov ntsiab lus siab tshaj plaws ntawm 0.05%. Nws tuaj yeem kho cov nplej, ncua cov txheej txheem recrystallization, thiab txhim kho lub zog thiab hardness. Txawm li cas los xij, cov ntsiab lus yuav tsum tsis txhob tshaj qhov txwv tus nqi, txwv tsis pub ntau cov hlau nplua nuj theem yuav raug tsim, uas yuav txo tau qhov corrosion kuj thiab txheej txheem kev ua tau zoo ntawm alloy.
Aluminium Al, Magnesium Mg, Silicon Si
1. Ib qho me me tuaj yeem yaj mus rau hauv cov khoom siv los txhim kho cov khoom siv ntawm cov hlau, tab sis thaum lub sij hawm melting txheej txheem, nws yog yooj yim oxidized los tsim refractory oxides, yog li txo qhov fluidity thiab lub zog ntawm tin bronze.
2. Cov ntsiab lus ntawm txhuas nyob rau hauv Sn bronze yuav tsum tsis txhob ntau tshaj 0.002%, thiab cov ntsiab lus ntawm Mg yuav tsum tau nruj me ntsis tswj, vim hais tias lawv oxides yuav txo tau lub zog ntawm cov alloy thiab txo lub fluidity ntawm lub yaj. Qee cov tin bronzes uas muaj Al thiab Mg tau tsim tawm txawv teb chaws, uas tsis tsuas yog muaj lub zog siab, tab sis kuj muaj qhov zoo corrosion kuj. Piv txwv li, Cu-5Sn-7Al alloy muaj kev tiv thaiv corrosion siab thiab lub zog, thiab Cu-5Sn- Lub zog ntawm lMg tin bronze tom qab kev laus tuaj yeem ncav cuag 900 MPa, 30 HRC, thiab conductivity yog 30% ~ 35% IACS. Nws tuaj yeem siv los tsim cov khoom siv nrog lub zog siab, siab corrosion kuj, thiab zoo conductivity.
