Kana zvasvika kune akadhindwa mabhodhi ematunhu, hatigoni kukanganwa basa rinokosha rezvinhu zvekubatsira.Parizvino, inonyanya kushandiswa tin-lead solder uye lead-isina solder.Iyo inonyanya kuzivikanwa ndeye 63Sn-37Pb eutectic tin-lead solder, yave yakanyanya kukosha yemagetsi solder kwemakore anoda kusvika zana.
Nekuda kwekunaka kwayo oxidation kuramba patembiricha yemumba, tin isimbi yakadzikira inonyungudika ine manyoro akapfava, uye yakanaka ductility.Lead haingori simbi yakapfava ine yakagadzikana makemikari zvimiro, oxidation resistance, uye corrosion resistance, asi zvakare ine yakanaka moldability, uye castability, uye iri nyore kugadzira nekuumba.Mutobvu nemarata ane good mutual solubility.Kuwedzera zvikamu zvakasiyana zvemutobvu kumarata zvinogona kuumba yakakwirira,, yepakati, uye yakaderera tembiricha solder.Kunyanya, 63Sn-37Pb eutectic solder ine yakanakisa magetsi conductivity,, kugadzikana kwekemikari,, mechanical zvivakwa uye processability, yakaderera kunyungudika uye yakakwirira solder joint simba, chinhu chakanakira zvemagetsi soldering.Naizvozvo, tini inogona kusanganiswa ne lead, sirivheri, bismuth, indium uye zvimwe zvinhu zvesimbi kugadzira yakakwirira, yepakati uye yakaderera tembiricha solder kune akasiyana maapplication.
Basic muviri uye kemikari zvimiro zverata
Tin isimbi ine sirivha-chena inopenya uye inoramba yakanaka kuoxidation pakamuri tembiricha uye inoramba ichipenya kana yaiswa mumhepo: ine density ye 7.298 g/cm2 (15) uye inonyunguduka inosvika 232, isimbi inonyungudika. ine nyoro nyoro uye yakanaka ductility.
I. The phase change phenomenon of tin
Chikamu chekuchinja cheti 13.2.white boron tin pane tembiricha yakakwira kupfuura phase change point;kana tembiricha yakadzikira pane chikamu chekuchinja, inotanga kushanduka kuita hupfu.Kana shanduko yechikamu ichiitika, huwandu huchawedzera ne26%.Kudzikira tembiricha tin chikamu shanduko inoita kuti solder iite brittle uye simba rinopotsa ranyangarika.Mwero wekuchinja kwechikamu unokurumidza kutenderedza -40, uye patembiricha iri pasi -50, simbi yesimbi inoshanduka kuita pfumbu grey tin.Nokudaro, tini yakachena haigoni kushandiswa pamusangano wemagetsi.
II.Iyo makemikari emhando yetin
1. Tin ine kunaka kwekuora kwemhepo mumhepo, kwete nyore kurasikirwa nekupenya, kwete kukanganiswa nemvura, oksijeni, carbon dioxide.
2. Tin inogona kudzivisa kuora kwe organic acids uye ine kupikisa kwakanyanya kune zvinhu zvisina kwazvakarerekera.
3. Tin isimbi yeamphoteric uye inogona kuita neasidhi yakasimba uye mabhesi, asi haigoni kurwisa chlorine, iodine, caustic soda uye alkali.
Corrosion.Naizvozvo, kumabhodhi egungano anoshandiswa munzvimbo dzine acidic, alkaline uye munyu wekupfapfaidza, katatu anti-corrosion coating inodiwa kuchengetedza majoini anotengeswa.
Pane zvakanakira nekuipira, aya ndiwo mativi maviri emari.Nokuti PCBA kugadzira, zvinokosha kufunga sei kusarudza zvakarurama tin-lead solder kana kunyange lead-isina solder maererano siyana zvigadzirwa muunhu kuzvidzora.
Nguva yekutumira: Zvita-21-2021