Nitrogen reflow soldering ndi njira yodzaza chipinda chotulukanso ndi gasi wa nayitrogeni kuti atseke kulowa kwa mpweya mu uvuni wa reflow kuti mupewe oxidation ya chigawo cha mapazi pa reflow soldering.Kugwiritsiridwa ntchito kwa nitrogen reflow makamaka kumapangitsanso khalidwe la soldering, kotero kuti soldering imapezeka m'malo okhala ndi mpweya wochepa kwambiri (100 PPM) kapena zochepa, zomwe zingapewe vuto la okosijeni ya zigawo zikuluzikulu.Choncho nkhani yaikulu ya nitrogen reflow soldering ndi kuonetsetsa kuti mpweya wa okosijeni ndi wotsika kwambiri.
Ndi kuwonjezeka kwa kachulukidwe ka msonkhano komanso kutuluka kwa ukadaulo wa Fine pitch Assembly, njira ya nitrogen reflow ndi zida zapangidwa, zomwe zakweza mtundu wa soldering ndi zokolola za reflow soldering ndipo zakhala njira yopangira reflow soldering.Guangshengde kunena za nitrogen reflow soldering ili ndi izi zabwino.
(1) Kupewa ndi kuchepetsa oxidation.
(2) onjezerani mphamvu yowotchera ndikuwonjezera liwiro.
(3) kuchepetsa m'badwo wa mipira malata, kupewa mlatho, kupeza bwino kuwotcherera.
Koma kuipa kwake ndi kuwonjezeka koonekeratu kwa mtengo, kuwonjezeka kwa mtengo ndi kuchuluka kwa nayitrogeni, pamene muyenera kufika ku 1000ppm okosijeni mu ng'anjo ndi 50ppm okhutira okosijeni, ambiri nayitrogeni okhutira mayeso ndi kuthandizira Intaneti mtundu okhutira oxygen analyzer. , Mfundo yoyesera ya okosijeni imapangidwa ndi makina owerengera mpweya wa okosijeni omwe amayamba kulumikizidwa kudzera pa malo osonkhanitsira nitrogen reflow, ndiyeno sonkhanitsani mpweyawo, pambuyo poyesa kusanthula kwa okosijeni Mtengo wa okosijeni umawunikidwa kuti upeze chiyero cha nayitrogeni.Nayitrogeni reflow soldering gasi malo osonkhanitsira ali ndi malo osachepera amodzi, malo osonkhanitsira mpweya wa nayitrogeni owonjezera amakhala opitilira atatu, zomwe zimafunikira pakuwotcherera ndizosiyana pakufunika kwa nayitrogeni ndikusiyana kwapadziko lonse lapansi.
Poyambitsa nayitrogeni mu reflow soldering, m'pofunika kuchita kafukufuku wamtengo wapatali, phindu lake limaphatikizapo zokolola zamtengo wapatali, kusintha kwa khalidwe, kukonzanso kapena kuchepetsa ndalama zothandizira, ndi zina zotero. sichimawonjezera mtengo womaliza, m'malo mwake, tingapindule nazo, madzi wamba wamba nayitrogeni, pali makina a nayitrogeni, kusankha kwa nayitrogeni kumakhalanso kosavuta.
Kodi mpweya wa PPM wochuluka bwanji ndi woyenera mu ng'anjo ya nayitrogeni?
Mabuku oyenerera amatsutsa kuti pansi pa 1000PPM kulowa mkati kudzakhala bwino kwambiri, 1000-2000PPM ndiyomwe imagwiritsidwa ntchito kwambiri, koma kugwiritsa ntchito kwenikweni njira yogwiritsira ntchito 99.99% yomwe ndi 100PPM nayitrogeni, ndipo ngakhale 99.999% yomwe ili 10PPM, ndi makasitomala ena. ngakhale kugwiritsa ntchito 98% ya nayitrogeni yomwe ili 20,000PPM.ndondomeko ina ya OSP, kuwotcherera mbali ziwiri, ndi PTH iyenera kukhala pansi pa 500PPM, pamene kuwonjezeka kwa zipilala zoyima kumayamba chifukwa cha kusindikiza kosakwanira.
Zambiri mwa ng'anjo zomwe zimagwiritsidwa ntchito masiku ano ndi zamtundu wa mpweya wotentha woumirizidwa, ndipo si ntchito yophweka kulamulira kadyedwe ka nitrogen m'ng'anjo zotere.Pali njira zingapo zochepetsera kuchuluka kwa nayitrogeni: imodzi ndiyo kuchepetsa malo otsegulira kuitanitsa ndi kutumiza kunja kwa ng'anjo, ndikofunikira kugwiritsa ntchito magawo, makatani kapena zida zofananira kuti aletse gawo la kulowetsa ndi kutumiza kunja kwa danga. yomwe sikugwiritsidwa ntchito, ina ndiyo kugwiritsa ntchito mfundo yakuti kutentha kwa nayitrogeni kumakhala kopepuka kuposa mpweya ndipo sikungatheke kusakaniza, popanga ng'anjo kuti apange chipinda chotenthetsera kuposa kuitanitsa ndi kutumiza kunja ndipamwamba, kotero kuti chipinda chotenthetsera chipangidwe. wosanjikiza wa nayitrogeni wachilengedwe, womwe umachepetsa kuchuluka kwa chiwongola dzanja cha nayitrogeni ndikuchepetsa kuchuluka kwa nayitrogeni ndikupangitsa kuti zikhale zosavuta kusakaniza.Izi zimachepetsa kuchuluka kwa chipukuta misozi ya nayitrogeni ndikusunga chiyero chofunikira.
Nthawi yotumiza: Aug-23-2022