Dab tsi yog qhov kev faib tawm ntawm tin bronze nrog sib txawv alloy ntsiab ntxiv?
Muaj tin bronze Tin bronze yog ib qho tseem ceeb tooj liab alloy siv nyob rau hauv kev lag luam. Txhawm rau txhim kho nws cov casting, mechanical thiab hnav tsis kam, nrog rau kev txuag cov tin, alloying ntsiab xws li phosphorus, zinc thiab txhuas yog ntxiv rau tin bronze. Yog li ntawd, tin bronze tuaj yeem muab faib ua peb pawg: tin-phosphor bronze, tin-zinc bronze thiab tin-zinc-lead.
Tin-phosphor tooj liab
Phosphorus yog ib tug zoo deoxidizer rau tooj liab alloys, uas yuav ua rau kom lub fluidity ntawm lub alloy, txhim kho cov txheej txheem thiab txhua yam khoom ntawm tin bronze, tab sis nce qib ntawm rov qab segregation.
Qhov txwv tsis pub solubility ntawm phosphorus hauv tin bronze yog {{0}}.15%. Thaum nws ntau dhau lawm, nws yuav tsim ib + δ + Cu3P ternary eutectic nrog lub melting point ntawm 628 degree. Nws yog ib qho yooj yim los tsim kub brittleness thaum kub dov thiab tsuas yog ua kom txias. Yog li ntawd, phosphorus cov ntsiab lus nyob rau hauv deformed tin bronze yuav tsum tsis txhob ntau tshaj 0.5%, thiab thaum lub sij hawm ua kub, phosphorus yuav tsum tsawg tshaj li 0.25%.
Phosphorus-muaj tin bronze yog cov khoom siv elastic zoo. Thaum lub sij hawm ua, nws yog ib qho tsim nyog los tswj cov qoob loo loj ua ntej ua haujlwm txias thiab qis kub annealing tom qab ua tiav. Lub zog, elastic modulus thiab qaug zog lub zog ntawm cov khoom zoo-grained tiav yog siab dua li cov ntaub ntawv ntxhib-grained tiav, tab sis cov yas qis dua. Cov ntaub ntawv txias ua tiav yog annealed ntawm 200-260 degree rau 1-2h los tsim cov nyhuv annealing hardening, uas tuaj yeem txhim kho lub zog, plasticity, elastic txwv thiab elastic modulus ntawm cov khoom, thiab ua rau kom muaj kev ruaj ntseg ntawm elasticity. .
Muaj 4 qib ntawm phosphorus-muaj tin bronze teev nyob rau hauv Suav teb tus qauv.
Ntawm lawv, QSn6.5-0.1 alloy feem ntau yog siv los ua cov ntsiab lus elastic, tshwj xeeb tshaj yog lub caij nplooj ntoos hlav tiv tauj nrog cov khoom siv hluav taws xob zoo, hnav-tiv taus qhov chaw thiab tiv thaiv cov khoom sib nqus hauv cov twj paj nruag thiab ntsuas;
Qsn6.
QSn7-0.2 alloy yog siv rau qhov chaw uas dais kev sib txhuam nyob rau hauv nruab nrab load thiab zawv zawg ceev, xws li bearings, bushings, turbines, thiab lwm yam., thiab tseem tuaj yeem ua cov khoom elastic thiab lwm yam khoom siv hluav taws xob thiab hluav taws xob;
QSn4-0.3 alloy yog siv los tsim ntau cov kav dej hauv qhov ntsuas siab raws li cov ntsiab lus rhiab, thiab lub npe hu ua siab ntsuas bronze.
Tin-zinc bronze
Zinc yog yaj nyob rau hauv ntau qhov ntau ntawm tooj liab-tin alloys, thiab tus nqi ntawm zinc ntxiv rau deformed tin bronze feem ntau tsis ntau tshaj 4%. Zinc tuaj yeem txhim kho qhov fluidity ntawm cov hlau, nqaim lub crystallization kub ntau, thiab txo qhov rov qab cais.
tin-zinc bronze qib suav nrog hauv Suav teb tam sim no tus qauv yog QSn 4-3, uas muaj elasticity zoo, hnav tsis kam thiab tiv thaiv hlau nplaum. Nws tuaj yeem ua haujlwm siab hauv cov xeev txias thiab kub, yooj yim rau vuam thiab braze, muaj kev ua haujlwm zoo, thiab muaj kev tiv thaiv corrosion zoo hauv huab cua, dej tshiab, thiab dej hiav txwv. Nws yog siv rau ntau yam elastic Cheebtsam, cov yeeb nkab fittings, cov khoom siv tshuaj, hnav-resistant qhov chaw, thiab anti-magnetic qhov chaw.
Tin-zinc-bronze
Lead yog qhov tseeb tsis soluble hauv tooj liab-tin alloys. Nws raug faib nruab nrab ntawm dendrites raws li ib theem, suav nrog dub. Kev faib cov hmoov txhuas nyob rau hauv lub ingot yog tsis yooj yim los ua ib yam. Feem ntau, ib qho me me ntawm npib tsib xee tuaj yeem muab ntxiv los txhim kho nws qhov kev faib tawm thiab kho cov qauv. Lead txo cov kev sib txhuam coefficient ntawm tin bronze, txhim kho hnav tsis kam thiab machinability, tab sis me ntsis txo cov khoom siv.
3% mus rau 5% zinc feem ntau yog ntxiv rau tooj liab-tin-lead alloys los txhim kho cov khoom siv kho tshuab.
Ntxiv {{0}}.02% rau 0.1% zirconium los yog 0.02% rau 0.1% boron, tshwj xeeb tshaj yog ntxiv 0.02 % mus rau 0.2% cov ntsiab lus tsis tshua muaj hauv ntiaj teb tuaj yeem kho cov khoom siv lead ua thiab ua rau lawv sib npaug sib npaug, yog li txhawm rau txhim kho lub koom haum, casting thiab mechanical zog ntawm txhuas-tin bronze.
Cov tin-zinc-lead bronze teev nyob rau hauv Suav teb tus qauv tam sim no muaj ob qib, QSn4-4-2.5 thiab QSn4-4-4. Nws muaj kev hnav tsis kam thiab yooj yim txiav. Nws yog tsuas yog siv nyob rau hauv daim ntawv ntawm daim hlau thiab strips rau tsheb, tsheb laij teb, aviation thiab machinery industries los tsim bushings thiab bearing liners. Nws yog lub npe hu ua automotive bronze.
